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refactor: Split sql_functions.go into smaller, focused files 

**File Structure Before:**
- sql_functions.go (850+ lines)
- sql_functions_test.go (1,205+ lines)

**File Structure After:**
- function_helpers.go (105 lines) - shared utility functions
- arithmetic_functions.go (205 lines) - arithmetic operators & math functions
- datetime_functions.go (170 lines) - date/time functions & constants
- string_functions.go (335 lines) - string manipulation functions
- arithmetic_functions_test.go (560 lines) - tests for arithmetic & math
- datetime_functions_test.go (370 lines) - tests for date/time functions
- string_functions_test.go (270 lines) - tests for string functions

**Benefits:**
✅ Better organization by functional domain
✅ Easier to find and maintain specific function types
✅ Smaller, more manageable file sizes
✅ Clear separation of concerns
✅ Improved code readability and navigation
✅ All tests passing - no functionality lost

**Total:** 7 focused files (1,455 lines) vs 2 monolithic files (2,055+ lines)

This refactoring improves maintainability while preserving all functionality.
pull/7185/head
chrislu 1 month ago
parent
179a7b446e
commit
2b35cca9bd
9 changed files with 2096 additions and 2055 deletions
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  1. 218
      weed/query/engine/arithmetic_functions.go
  2. 530
      weed/query/engine/arithmetic_functions_test.go
  3. 195
      weed/query/engine/datetime_functions.go
  4. 418
      weed/query/engine/datetime_functions_test.go
  5. 131
      weed/query/engine/function_helpers.go
  6. 850
      weed/query/engine/sql_functions.go
  7. 1205
      weed/query/engine/sql_functions_test.go
  8. 333
      weed/query/engine/string_functions.go
  9. 271
      weed/query/engine/string_functions_test.go

218
weed/query/engine/arithmetic_functions.go
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@ -0,0 +1,218 @@
package engine
import (
"fmt"
"math"
"github.com/seaweedfs/seaweedfs/weed/pb/schema_pb"
)
// ===============================
// ARITHMETIC OPERATORS
// ===============================
// ArithmeticOperator represents basic arithmetic operations
type ArithmeticOperator string
const (
OpAdd ArithmeticOperator = "+"
OpSub ArithmeticOperator = "-"
OpMul ArithmeticOperator = "*"
OpDiv ArithmeticOperator = "/"
OpMod ArithmeticOperator = "%"
)
// EvaluateArithmeticExpression evaluates basic arithmetic operations between two values
func (e *SQLEngine) EvaluateArithmeticExpression(left, right *schema_pb.Value, operator ArithmeticOperator) (*schema_pb.Value, error) {
if left == nil || right == nil {
return nil, fmt.Errorf("arithmetic operation requires non-null operands")
}
// Convert values to numeric types for calculation
leftNum, err := e.valueToFloat64(left)
if err != nil {
return nil, fmt.Errorf("left operand conversion error: %v", err)
}
rightNum, err := e.valueToFloat64(right)
if err != nil {
return nil, fmt.Errorf("right operand conversion error: %v", err)
}
var result float64
var resultErr error
switch operator {
case OpAdd:
result = leftNum + rightNum
case OpSub:
result = leftNum - rightNum
case OpMul:
result = leftNum * rightNum
case OpDiv:
if rightNum == 0 {
return nil, fmt.Errorf("division by zero")
}
result = leftNum / rightNum
case OpMod:
if rightNum == 0 {
return nil, fmt.Errorf("modulo by zero")
}
result = math.Mod(leftNum, rightNum)
default:
return nil, fmt.Errorf("unsupported arithmetic operator: %s", operator)
}
if resultErr != nil {
return nil, resultErr
}
// Convert result back to appropriate schema value type
// If both operands were integers and operation doesn't produce decimal, return integer
if e.isIntegerValue(left) && e.isIntegerValue(right) &&
(operator == OpAdd || operator == OpSub || operator == OpMul || operator == OpMod) {
return &schema_pb.Value{
Kind: &schema_pb.Value_Int64Value{Int64Value: int64(result)},
}, nil
}
// Otherwise return as double/float
return &schema_pb.Value{
Kind: &schema_pb.Value_DoubleValue{DoubleValue: result},
}, nil
}
// Add evaluates addition (left + right)
func (e *SQLEngine) Add(left, right *schema_pb.Value) (*schema_pb.Value, error) {
return e.EvaluateArithmeticExpression(left, right, OpAdd)
}
// Subtract evaluates subtraction (left - right)
func (e *SQLEngine) Subtract(left, right *schema_pb.Value) (*schema_pb.Value, error) {
return e.EvaluateArithmeticExpression(left, right, OpSub)
}
// Multiply evaluates multiplication (left * right)
func (e *SQLEngine) Multiply(left, right *schema_pb.Value) (*schema_pb.Value, error) {
return e.EvaluateArithmeticExpression(left, right, OpMul)
}
// Divide evaluates division (left / right)
func (e *SQLEngine) Divide(left, right *schema_pb.Value) (*schema_pb.Value, error) {
return e.EvaluateArithmeticExpression(left, right, OpDiv)
}
// Modulo evaluates modulo operation (left % right)
func (e *SQLEngine) Modulo(left, right *schema_pb.Value) (*schema_pb.Value, error) {
return e.EvaluateArithmeticExpression(left, right, OpMod)
}
// ===============================
// MATHEMATICAL FUNCTIONS
// ===============================
// Round rounds a numeric value to the nearest integer or specified decimal places
func (e *SQLEngine) Round(value *schema_pb.Value, precision ...*schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("ROUND function requires non-null value")
}
num, err := e.valueToFloat64(value)
if err != nil {
return nil, fmt.Errorf("ROUND function conversion error: %v", err)
}
// Default precision is 0 (round to integer)
precisionValue := 0
if len(precision) > 0 && precision[0] != nil {
precFloat, err := e.valueToFloat64(precision[0])
if err != nil {
return nil, fmt.Errorf("ROUND precision conversion error: %v", err)
}
precisionValue = int(precFloat)
}
// Apply rounding
multiplier := math.Pow(10, float64(precisionValue))
rounded := math.Round(num*multiplier) / multiplier
// Return as integer if precision is 0 and original was integer, otherwise as double
if precisionValue == 0 && e.isIntegerValue(value) {
return &schema_pb.Value{
Kind: &schema_pb.Value_Int64Value{Int64Value: int64(rounded)},
}, nil
}
return &schema_pb.Value{
Kind: &schema_pb.Value_DoubleValue{DoubleValue: rounded},
}, nil
}
// Ceil returns the smallest integer greater than or equal to the value
func (e *SQLEngine) Ceil(value *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("CEIL function requires non-null value")
}
num, err := e.valueToFloat64(value)
if err != nil {
return nil, fmt.Errorf("CEIL function conversion error: %v", err)
}
result := math.Ceil(num)
return &schema_pb.Value{
Kind: &schema_pb.Value_Int64Value{Int64Value: int64(result)},
}, nil
}
// Floor returns the largest integer less than or equal to the value
func (e *SQLEngine) Floor(value *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("FLOOR function requires non-null value")
}
num, err := e.valueToFloat64(value)
if err != nil {
return nil, fmt.Errorf("FLOOR function conversion error: %v", err)
}
result := math.Floor(num)
return &schema_pb.Value{
Kind: &schema_pb.Value_Int64Value{Int64Value: int64(result)},
}, nil
}
// Abs returns the absolute value of a number
func (e *SQLEngine) Abs(value *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("ABS function requires non-null value")
}
num, err := e.valueToFloat64(value)
if err != nil {
return nil, fmt.Errorf("ABS function conversion error: %v", err)
}
result := math.Abs(num)
// Return same type as input if possible
if e.isIntegerValue(value) {
return &schema_pb.Value{
Kind: &schema_pb.Value_Int64Value{Int64Value: int64(result)},
}, nil
}
// Check if original was float32
if _, ok := value.Kind.(*schema_pb.Value_FloatValue); ok {
return &schema_pb.Value{
Kind: &schema_pb.Value_FloatValue{FloatValue: float32(result)},
}, nil
}
// Default to double
return &schema_pb.Value{
Kind: &schema_pb.Value_DoubleValue{DoubleValue: result},
}, nil
}

530
weed/query/engine/arithmetic_functions_test.go
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@ -0,0 +1,530 @@
package engine
import (
"testing"
"github.com/seaweedfs/seaweedfs/weed/pb/schema_pb"
)
func TestArithmeticOperations(t *testing.T) {
engine := NewTestSQLEngine()
tests := []struct {
name string
left *schema_pb.Value
right *schema_pb.Value
operator ArithmeticOperator
expected *schema_pb.Value
expectErr bool
}{
// Addition tests
{
name: "Add two integers",
left: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 10}},
right: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 5}},
operator: OpAdd,
expected: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 15}},
expectErr: false,
},
{
name: "Add integer and float",
left: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 10}},
right: &schema_pb.Value{Kind: &schema_pb.Value_DoubleValue{DoubleValue: 5.5}},
operator: OpAdd,
expected: &schema_pb.Value{Kind: &schema_pb.Value_DoubleValue{DoubleValue: 15.5}},
expectErr: false,
},
// Subtraction tests
{
name: "Subtract two integers",
left: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 10}},
right: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 3}},
operator: OpSub,
expected: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 7}},
expectErr: false,
},
// Multiplication tests
{
name: "Multiply two integers",
left: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 6}},
right: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 7}},
operator: OpMul,
expected: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 42}},
expectErr: false,
},
{
name: "Multiply with float",
left: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 5}},
right: &schema_pb.Value{Kind: &schema_pb.Value_FloatValue{FloatValue: 2.5}},
operator: OpMul,
expected: &schema_pb.Value{Kind: &schema_pb.Value_DoubleValue{DoubleValue: 12.5}},
expectErr: false,
},
// Division tests
{
name: "Divide two integers",
left: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 20}},
right: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 4}},
operator: OpDiv,
expected: &schema_pb.Value{Kind: &schema_pb.Value_DoubleValue{DoubleValue: 5.0}},
expectErr: false,
},
{
name: "Division by zero",
left: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 10}},
right: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 0}},
operator: OpDiv,
expected: nil,
expectErr: true,
},
// Modulo tests
{
name: "Modulo operation",
left: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 17}},
right: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 5}},
operator: OpMod,
expected: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 2}},
expectErr: false,
},
{
name: "Modulo by zero",
left: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 10}},
right: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 0}},
operator: OpMod,
expected: nil,
expectErr: true,
},
// String conversion tests
{
name: "Add string number to integer",
left: &schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "15"}},
right: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 5}},
operator: OpAdd,
expected: &schema_pb.Value{Kind: &schema_pb.Value_DoubleValue{DoubleValue: 20.0}},
expectErr: false,
},
{
name: "Invalid string conversion",
left: &schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "not_a_number"}},
right: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 5}},
operator: OpAdd,
expected: nil,
expectErr: true,
},
// Boolean conversion tests
{
name: "Add boolean to integer",
left: &schema_pb.Value{Kind: &schema_pb.Value_BoolValue{BoolValue: true}},
right: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 5}},
operator: OpAdd,
expected: &schema_pb.Value{Kind: &schema_pb.Value_DoubleValue{DoubleValue: 6.0}},
expectErr: false,
},
// Null value tests
{
name: "Add with null left operand",
left: nil,
right: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 5}},
operator: OpAdd,
expected: nil,
expectErr: true,
},
{
name: "Add with null right operand",
left: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 5}},
right: nil,
operator: OpAdd,
expected: nil,
expectErr: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result, err := engine.EvaluateArithmeticExpression(tt.left, tt.right, tt.operator)
if tt.expectErr {
if err == nil {
t.Errorf("Expected error but got none")
}
return
}
if err != nil {
t.Errorf("Unexpected error: %v", err)
return
}
if !valuesEqual(result, tt.expected) {
t.Errorf("Expected %v, got %v", tt.expected, result)
}
})
}
}
func TestIndividualArithmeticFunctions(t *testing.T) {
engine := NewTestSQLEngine()
left := &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 10}}
right := &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 3}}
// Test Add function
result, err := engine.Add(left, right)
if err != nil {
t.Errorf("Add function failed: %v", err)
}
expected := &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 13}}
if !valuesEqual(result, expected) {
t.Errorf("Add: Expected %v, got %v", expected, result)
}
// Test Subtract function
result, err = engine.Subtract(left, right)
if err != nil {
t.Errorf("Subtract function failed: %v", err)
}
expected = &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 7}}
if !valuesEqual(result, expected) {
t.Errorf("Subtract: Expected %v, got %v", expected, result)
}
// Test Multiply function
result, err = engine.Multiply(left, right)
if err != nil {
t.Errorf("Multiply function failed: %v", err)
}
expected = &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 30}}
if !valuesEqual(result, expected) {
t.Errorf("Multiply: Expected %v, got %v", expected, result)
}
// Test Divide function
result, err = engine.Divide(left, right)
if err != nil {
t.Errorf("Divide function failed: %v", err)
}
expected = &schema_pb.Value{Kind: &schema_pb.Value_DoubleValue{DoubleValue: 10.0/3.0}}
if !valuesEqual(result, expected) {
t.Errorf("Divide: Expected %v, got %v", expected, result)
}
// Test Modulo function
result, err = engine.Modulo(left, right)
if err != nil {
t.Errorf("Modulo function failed: %v", err)
}
expected = &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 1}}
if !valuesEqual(result, expected) {
t.Errorf("Modulo: Expected %v, got %v", expected, result)
}
}
func TestMathematicalFunctions(t *testing.T) {
engine := NewTestSQLEngine()
t.Run("ROUND function tests", func(t *testing.T) {
tests := []struct {
name string
value *schema_pb.Value
precision *schema_pb.Value
expected *schema_pb.Value
expectErr bool
}{
{
name: "Round float to integer",
value: &schema_pb.Value{Kind: &schema_pb.Value_DoubleValue{DoubleValue: 3.7}},
precision: nil,
expected: &schema_pb.Value{Kind: &schema_pb.Value_DoubleValue{DoubleValue: 4.0}},
expectErr: false,
},
{
name: "Round integer stays integer",
value: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 5}},
precision: nil,
expected: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 5}},
expectErr: false,
},
{
name: "Round with precision 2",
value: &schema_pb.Value{Kind: &schema_pb.Value_DoubleValue{DoubleValue: 3.14159}},
precision: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 2}},
expected: &schema_pb.Value{Kind: &schema_pb.Value_DoubleValue{DoubleValue: 3.14}},
expectErr: false,
},
{
name: "Round negative number",
value: &schema_pb.Value{Kind: &schema_pb.Value_DoubleValue{DoubleValue: -3.7}},
precision: nil,
expected: &schema_pb.Value{Kind: &schema_pb.Value_DoubleValue{DoubleValue: -4.0}},
expectErr: false,
},
{
name: "Round null value",
value: nil,
precision: nil,
expected: nil,
expectErr: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
var result *schema_pb.Value
var err error
if tt.precision != nil {
result, err = engine.Round(tt.value, tt.precision)
} else {
result, err = engine.Round(tt.value)
}
if tt.expectErr {
if err == nil {
t.Errorf("Expected error but got none")
}
return
}
if err != nil {
t.Errorf("Unexpected error: %v", err)
return
}
if !valuesEqual(result, tt.expected) {
t.Errorf("Expected %v, got %v", tt.expected, result)
}
})
}
})
t.Run("CEIL function tests", func(t *testing.T) {
tests := []struct {
name string
value *schema_pb.Value
expected *schema_pb.Value
expectErr bool
}{
{
name: "Ceil positive decimal",
value: &schema_pb.Value{Kind: &schema_pb.Value_DoubleValue{DoubleValue: 3.2}},
expected: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 4}},
expectErr: false,
},
{
name: "Ceil negative decimal",
value: &schema_pb.Value{Kind: &schema_pb.Value_DoubleValue{DoubleValue: -3.2}},
expected: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: -3}},
expectErr: false,
},
{
name: "Ceil integer",
value: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 5}},
expected: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 5}},
expectErr: false,
},
{
name: "Ceil null value",
value: nil,
expected: nil,
expectErr: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result, err := engine.Ceil(tt.value)
if tt.expectErr {
if err == nil {
t.Errorf("Expected error but got none")
}
return
}
if err != nil {
t.Errorf("Unexpected error: %v", err)
return
}
if !valuesEqual(result, tt.expected) {
t.Errorf("Expected %v, got %v", tt.expected, result)
}
})
}
})
t.Run("FLOOR function tests", func(t *testing.T) {
tests := []struct {
name string
value *schema_pb.Value
expected *schema_pb.Value
expectErr bool
}{
{
name: "Floor positive decimal",
value: &schema_pb.Value{Kind: &schema_pb.Value_DoubleValue{DoubleValue: 3.8}},
expected: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 3}},
expectErr: false,
},
{
name: "Floor negative decimal",
value: &schema_pb.Value{Kind: &schema_pb.Value_DoubleValue{DoubleValue: -3.2}},
expected: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: -4}},
expectErr: false,
},
{
name: "Floor integer",
value: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 5}},
expected: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 5}},
expectErr: false,
},
{
name: "Floor null value",
value: nil,
expected: nil,
expectErr: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result, err := engine.Floor(tt.value)
if tt.expectErr {
if err == nil {
t.Errorf("Expected error but got none")
}
return
}
if err != nil {
t.Errorf("Unexpected error: %v", err)
return
}
if !valuesEqual(result, tt.expected) {
t.Errorf("Expected %v, got %v", tt.expected, result)
}
})
}
})
t.Run("ABS function tests", func(t *testing.T) {
tests := []struct {
name string
value *schema_pb.Value
expected *schema_pb.Value
expectErr bool
}{
{
name: "Abs positive integer",
value: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 5}},
expected: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 5}},
expectErr: false,
},
{
name: "Abs negative integer",
value: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: -5}},
expected: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 5}},
expectErr: false,
},
{
name: "Abs positive double",
value: &schema_pb.Value{Kind: &schema_pb.Value_DoubleValue{DoubleValue: 3.14}},
expected: &schema_pb.Value{Kind: &schema_pb.Value_DoubleValue{DoubleValue: 3.14}},
expectErr: false,
},
{
name: "Abs negative double",
value: &schema_pb.Value{Kind: &schema_pb.Value_DoubleValue{DoubleValue: -3.14}},
expected: &schema_pb.Value{Kind: &schema_pb.Value_DoubleValue{DoubleValue: 3.14}},
expectErr: false,
},
{
name: "Abs positive float",
value: &schema_pb.Value{Kind: &schema_pb.Value_FloatValue{FloatValue: 2.5}},
expected: &schema_pb.Value{Kind: &schema_pb.Value_FloatValue{FloatValue: 2.5}},
expectErr: false,
},
{
name: "Abs negative float",
value: &schema_pb.Value{Kind: &schema_pb.Value_FloatValue{FloatValue: -2.5}},
expected: &schema_pb.Value{Kind: &schema_pb.Value_FloatValue{FloatValue: 2.5}},
expectErr: false,
},
{
name: "Abs zero",
value: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 0}},
expected: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 0}},
expectErr: false,
},
{
name: "Abs null value",
value: nil,
expected: nil,
expectErr: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result, err := engine.Abs(tt.value)
if tt.expectErr {
if err == nil {
t.Errorf("Expected error but got none")
}
return
}
if err != nil {
t.Errorf("Unexpected error: %v", err)
return
}
if !valuesEqual(result, tt.expected) {
t.Errorf("Expected %v, got %v", tt.expected, result)
}
})
}
})
}
// Helper function to compare two schema_pb.Value objects
func valuesEqual(v1, v2 *schema_pb.Value) bool {
if v1 == nil && v2 == nil {
return true
}
if v1 == nil || v2 == nil {
return false
}
switch v1Kind := v1.Kind.(type) {
case *schema_pb.Value_Int32Value:
if v2Kind, ok := v2.Kind.(*schema_pb.Value_Int32Value); ok {
return v1Kind.Int32Value == v2Kind.Int32Value
}
case *schema_pb.Value_Int64Value:
if v2Kind, ok := v2.Kind.(*schema_pb.Value_Int64Value); ok {
return v1Kind.Int64Value == v2Kind.Int64Value
}
case *schema_pb.Value_FloatValue:
if v2Kind, ok := v2.Kind.(*schema_pb.Value_FloatValue); ok {
return v1Kind.FloatValue == v2Kind.FloatValue
}
case *schema_pb.Value_DoubleValue:
if v2Kind, ok := v2.Kind.(*schema_pb.Value_DoubleValue); ok {
return v1Kind.DoubleValue == v2Kind.DoubleValue
}
case *schema_pb.Value_StringValue:
if v2Kind, ok := v2.Kind.(*schema_pb.Value_StringValue); ok {
return v1Kind.StringValue == v2Kind.StringValue
}
case *schema_pb.Value_BoolValue:
if v2Kind, ok := v2.Kind.(*schema_pb.Value_BoolValue); ok {
return v1Kind.BoolValue == v2Kind.BoolValue
}
}
return false
}

195
weed/query/engine/datetime_functions.go
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@ -0,0 +1,195 @@
package engine
import (
"fmt"
"strings"
"time"
"github.com/seaweedfs/seaweedfs/weed/pb/schema_pb"
)
// ===============================
// DATE/TIME CONSTANTS
// ===============================
// CurrentDate returns the current date as a string in YYYY-MM-DD format
func (e *SQLEngine) CurrentDate() (*schema_pb.Value, error) {
now := time.Now()
dateStr := now.Format("2006-01-02")
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: dateStr},
}, nil
}
// CurrentTimestamp returns the current timestamp
func (e *SQLEngine) CurrentTimestamp() (*schema_pb.Value, error) {
now := time.Now()
// Return as TimestampValue with microseconds
timestampMicros := now.UnixMicro()
return &schema_pb.Value{
Kind: &schema_pb.Value_TimestampValue{
TimestampValue: &schema_pb.TimestampValue{
TimestampMicros: timestampMicros,
},
},
}, nil
}
// CurrentTime returns the current time as a string in HH:MM:SS format
func (e *SQLEngine) CurrentTime() (*schema_pb.Value, error) {
now := time.Now()
timeStr := now.Format("15:04:05")
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: timeStr},
}, nil
}
// Now is an alias for CurrentTimestamp (common SQL function name)
func (e *SQLEngine) Now() (*schema_pb.Value, error) {
return e.CurrentTimestamp()
}
// ===============================
// EXTRACT FUNCTION
// ===============================
// DatePart represents the part of a date/time to extract
type DatePart string
const (
PartYear DatePart = "YEAR"
PartMonth DatePart = "MONTH"
PartDay DatePart = "DAY"
PartHour DatePart = "HOUR"
PartMinute DatePart = "MINUTE"
PartSecond DatePart = "SECOND"
PartWeek DatePart = "WEEK"
PartDayOfYear DatePart = "DOY"
PartDayOfWeek DatePart = "DOW"
PartQuarter DatePart = "QUARTER"
PartEpoch DatePart = "EPOCH"
)
// Extract extracts a specific part from a date/time value
func (e *SQLEngine) Extract(part DatePart, value *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("EXTRACT function requires non-null value")
}
// Convert value to time
t, err := e.valueToTime(value)
if err != nil {
return nil, fmt.Errorf("EXTRACT function time conversion error: %v", err)
}
var result int64
switch strings.ToUpper(string(part)) {
case string(PartYear):
result = int64(t.Year())
case string(PartMonth):
result = int64(t.Month())
case string(PartDay):
result = int64(t.Day())
case string(PartHour):
result = int64(t.Hour())
case string(PartMinute):
result = int64(t.Minute())
case string(PartSecond):
result = int64(t.Second())
case string(PartWeek):
_, week := t.ISOWeek()
result = int64(week)
case string(PartDayOfYear):
result = int64(t.YearDay())
case string(PartDayOfWeek):
result = int64(t.Weekday())
case string(PartQuarter):
month := t.Month()
result = int64((month-1)/3 + 1)
case string(PartEpoch):
result = t.Unix()
default:
return nil, fmt.Errorf("unsupported date part: %s", part)
}
return &schema_pb.Value{
Kind: &schema_pb.Value_Int64Value{Int64Value: result},
}, nil
}
// ===============================
// DATE_TRUNC FUNCTION
// ===============================
// DateTrunc truncates a date/time to the specified precision
func (e *SQLEngine) DateTrunc(precision string, value *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("DATE_TRUNC function requires non-null value")
}
// Convert value to time
t, err := e.valueToTime(value)
if err != nil {
return nil, fmt.Errorf("DATE_TRUNC function time conversion error: %v", err)
}
var truncated time.Time
switch strings.ToLower(precision) {
case "microsecond", "microseconds":
// No truncation needed for microsecond precision
truncated = t
case "millisecond", "milliseconds":
truncated = t.Truncate(time.Millisecond)
case "second", "seconds":
truncated = t.Truncate(time.Second)
case "minute", "minutes":
truncated = t.Truncate(time.Minute)
case "hour", "hours":
truncated = t.Truncate(time.Hour)
case "day", "days":
truncated = time.Date(t.Year(), t.Month(), t.Day(), 0, 0, 0, 0, t.Location())
case "week", "weeks":
// Truncate to beginning of week (Monday)
days := int(t.Weekday())
if days == 0 { // Sunday = 0, adjust to make Monday = 0
days = 6
} else {
days = days - 1
}
truncated = time.Date(t.Year(), t.Month(), t.Day()-days, 0, 0, 0, 0, t.Location())
case "month", "months":
truncated = time.Date(t.Year(), t.Month(), 1, 0, 0, 0, 0, t.Location())
case "quarter", "quarters":
month := t.Month()
quarterMonth := ((int(month)-1)/3)*3 + 1
truncated = time.Date(t.Year(), time.Month(quarterMonth), 1, 0, 0, 0, 0, t.Location())
case "year", "years":
truncated = time.Date(t.Year(), 1, 1, 0, 0, 0, 0, t.Location())
case "decade", "decades":
year := (t.Year()/10) * 10
truncated = time.Date(year, 1, 1, 0, 0, 0, 0, t.Location())
case "century", "centuries":
year := ((t.Year()-1)/100)*100 + 1
truncated = time.Date(year, 1, 1, 0, 0, 0, 0, t.Location())
case "millennium", "millennia":
year := ((t.Year()-1)/1000)*1000 + 1
truncated = time.Date(year, 1, 1, 0, 0, 0, 0, t.Location())
default:
return nil, fmt.Errorf("unsupported date truncation precision: %s", precision)
}
// Return as TimestampValue
return &schema_pb.Value{
Kind: &schema_pb.Value_TimestampValue{
TimestampValue: &schema_pb.TimestampValue{
TimestampMicros: truncated.UnixMicro(),
},
},
}, nil
}

418
weed/query/engine/datetime_functions_test.go
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@ -0,0 +1,418 @@
package engine
import (
"testing"
"time"
"github.com/seaweedfs/seaweedfs/weed/pb/schema_pb"
)
func TestDateTimeFunctions(t *testing.T) {
engine := NewTestSQLEngine()
t.Run("CURRENT_DATE function tests", func(t *testing.T) {
result, err := engine.CurrentDate()
if err != nil {
t.Errorf("CurrentDate failed: %v", err)
}
if result == nil {
t.Errorf("CurrentDate returned nil result")
return
}
stringVal, ok := result.Kind.(*schema_pb.Value_StringValue)
if !ok {
t.Errorf("CurrentDate should return string value, got %T", result.Kind)
return
}
// Check format (YYYY-MM-DD)
today := time.Now().Format("2006-01-02")
if stringVal.StringValue != today {
t.Errorf("Expected current date %s, got %s", today, stringVal.StringValue)
}
})
t.Run("CURRENT_TIMESTAMP function tests", func(t *testing.T) {
before := time.Now()
result, err := engine.CurrentTimestamp()
after := time.Now()
if err != nil {
t.Errorf("CurrentTimestamp failed: %v", err)
}
if result == nil {
t.Errorf("CurrentTimestamp returned nil result")
return
}
timestampVal, ok := result.Kind.(*schema_pb.Value_TimestampValue)
if !ok {
t.Errorf("CurrentTimestamp should return timestamp value, got %T", result.Kind)
return
}
timestamp := time.UnixMicro(timestampVal.TimestampValue.TimestampMicros)
// Check that timestamp is within reasonable range
if timestamp.Before(before) || timestamp.After(after) {
t.Errorf("Timestamp %v should be between %v and %v", timestamp, before, after)
}
})
t.Run("NOW function tests", func(t *testing.T) {
result, err := engine.Now()
if err != nil {
t.Errorf("Now failed: %v", err)
}
if result == nil {
t.Errorf("Now returned nil result")
return
}
// Should return same type as CurrentTimestamp
_, ok := result.Kind.(*schema_pb.Value_TimestampValue)
if !ok {
t.Errorf("Now should return timestamp value, got %T", result.Kind)
}
})
t.Run("CURRENT_TIME function tests", func(t *testing.T) {
result, err := engine.CurrentTime()
if err != nil {
t.Errorf("CurrentTime failed: %v", err)
}
if result == nil {
t.Errorf("CurrentTime returned nil result")
return
}
stringVal, ok := result.Kind.(*schema_pb.Value_StringValue)
if !ok {
t.Errorf("CurrentTime should return string value, got %T", result.Kind)
return
}
// Check format (HH:MM:SS)
if len(stringVal.StringValue) != 8 || stringVal.StringValue[2] != ':' || stringVal.StringValue[5] != ':' {
t.Errorf("CurrentTime should return HH:MM:SS format, got %s", stringVal.StringValue)
}
})
}
func TestExtractFunction(t *testing.T) {
engine := NewTestSQLEngine()
// Create a test timestamp: 2023-06-15 14:30:45
// Use local time to avoid timezone conversion issues
testTime := time.Date(2023, 6, 15, 14, 30, 45, 0, time.Local)
testTimestamp := &schema_pb.Value{
Kind: &schema_pb.Value_TimestampValue{
TimestampValue: &schema_pb.TimestampValue{
TimestampMicros: testTime.UnixMicro(),
},
},
}
tests := []struct {
name string
part DatePart
value *schema_pb.Value
expected int64
expectErr bool
}{
{
name: "Extract YEAR",
part: PartYear,
value: testTimestamp,
expected: 2023,
expectErr: false,
},
{
name: "Extract MONTH",
part: PartMonth,
value: testTimestamp,
expected: 6,
expectErr: false,
},
{
name: "Extract DAY",
part: PartDay,
value: testTimestamp,
expected: 15,
expectErr: false,
},
{
name: "Extract HOUR",
part: PartHour,
value: testTimestamp,
expected: 14,
expectErr: false,
},
{
name: "Extract MINUTE",
part: PartMinute,
value: testTimestamp,
expected: 30,
expectErr: false,
},
{
name: "Extract SECOND",
part: PartSecond,
value: testTimestamp,
expected: 45,
expectErr: false,
},
{
name: "Extract QUARTER from June",
part: PartQuarter,
value: testTimestamp,
expected: 2, // June is in Q2
expectErr: false,
},
{
name: "Extract from string date",
part: PartYear,
value: &schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "2023-06-15"}},
expected: 2023,
expectErr: false,
},
{
name: "Extract from Unix timestamp",
part: PartYear,
value: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: testTime.Unix()}},
expected: 2023,
expectErr: false,
},
{
name: "Extract from null value",
part: PartYear,
value: nil,
expected: 0,
expectErr: true,
},
{
name: "Extract invalid part",
part: DatePart("INVALID"),
value: testTimestamp,
expected: 0,
expectErr: true,
},
{
name: "Extract from invalid string",
part: PartYear,
value: &schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "invalid-date"}},
expected: 0,
expectErr: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result, err := engine.Extract(tt.part, tt.value)
if tt.expectErr {
if err == nil {
t.Errorf("Expected error but got none")
}
return
}
if err != nil {
t.Errorf("Unexpected error: %v", err)
return
}
if result == nil {
t.Errorf("Extract returned nil result")
return
}
intVal, ok := result.Kind.(*schema_pb.Value_Int64Value)
if !ok {
t.Errorf("Extract should return int64 value, got %T", result.Kind)
return
}
if intVal.Int64Value != tt.expected {
t.Errorf("Expected %d, got %d", tt.expected, intVal.Int64Value)
}
})
}
}
func TestDateTruncFunction(t *testing.T) {
engine := NewTestSQLEngine()
// Create a test timestamp: 2023-06-15 14:30:45.123456
testTime := time.Date(2023, 6, 15, 14, 30, 45, 123456000, time.Local) // nanoseconds
testTimestamp := &schema_pb.Value{
Kind: &schema_pb.Value_TimestampValue{
TimestampValue: &schema_pb.TimestampValue{
TimestampMicros: testTime.UnixMicro(),
},
},
}
tests := []struct {
name string
precision string
value *schema_pb.Value
expectErr bool
expectedCheck func(result time.Time) bool // Custom check function
}{
{
name: "Truncate to second",
precision: "second",
value: testTimestamp,
expectErr: false,
expectedCheck: func(result time.Time) bool {
return result.Year() == 2023 && result.Month() == 6 && result.Day() == 15 &&
result.Hour() == 14 && result.Minute() == 30 && result.Second() == 45 &&
result.Nanosecond() == 0
},
},
{
name: "Truncate to minute",
precision: "minute",
value: testTimestamp,
expectErr: false,
expectedCheck: func(result time.Time) bool {
return result.Year() == 2023 && result.Month() == 6 && result.Day() == 15 &&
result.Hour() == 14 && result.Minute() == 30 && result.Second() == 0 &&
result.Nanosecond() == 0
},
},
{
name: "Truncate to hour",
precision: "hour",
value: testTimestamp,
expectErr: false,
expectedCheck: func(result time.Time) bool {
return result.Year() == 2023 && result.Month() == 6 && result.Day() == 15 &&
result.Hour() == 14 && result.Minute() == 0 && result.Second() == 0 &&
result.Nanosecond() == 0
},
},
{
name: "Truncate to day",
precision: "day",
value: testTimestamp,
expectErr: false,
expectedCheck: func(result time.Time) bool {
return result.Year() == 2023 && result.Month() == 6 && result.Day() == 15 &&
result.Hour() == 0 && result.Minute() == 0 && result.Second() == 0 &&
result.Nanosecond() == 0
},
},
{
name: "Truncate to month",
precision: "month",
value: testTimestamp,
expectErr: false,
expectedCheck: func(result time.Time) bool {
return result.Year() == 2023 && result.Month() == 6 && result.Day() == 1 &&
result.Hour() == 0 && result.Minute() == 0 && result.Second() == 0 &&
result.Nanosecond() == 0
},
},
{
name: "Truncate to quarter",
precision: "quarter",
value: testTimestamp,
expectErr: false,
expectedCheck: func(result time.Time) bool {
// June (month 6) should truncate to April (month 4) - start of Q2
return result.Year() == 2023 && result.Month() == 4 && result.Day() == 1 &&
result.Hour() == 0 && result.Minute() == 0 && result.Second() == 0 &&
result.Nanosecond() == 0
},
},
{
name: "Truncate to year",
precision: "year",
value: testTimestamp,
expectErr: false,
expectedCheck: func(result time.Time) bool {
return result.Year() == 2023 && result.Month() == 1 && result.Day() == 1 &&
result.Hour() == 0 && result.Minute() == 0 && result.Second() == 0 &&
result.Nanosecond() == 0
},
},
{
name: "Truncate with plural precision",
precision: "minutes", // Test plural form
value: testTimestamp,
expectErr: false,
expectedCheck: func(result time.Time) bool {
return result.Year() == 2023 && result.Month() == 6 && result.Day() == 15 &&
result.Hour() == 14 && result.Minute() == 30 && result.Second() == 0 &&
result.Nanosecond() == 0
},
},
{
name: "Truncate from string date",
precision: "day",
value: &schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "2023-06-15 14:30:45"}},
expectErr: false,
expectedCheck: func(result time.Time) bool {
// The result should be the start of day 2023-06-15 in local timezone
expectedDay := time.Date(2023, 6, 15, 0, 0, 0, 0, result.Location())
return result.Equal(expectedDay)
},
},
{
name: "Truncate null value",
precision: "day",
value: nil,
expectErr: true,
expectedCheck: nil,
},
{
name: "Invalid precision",
precision: "invalid",
value: testTimestamp,
expectErr: true,
expectedCheck: nil,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result, err := engine.DateTrunc(tt.precision, tt.value)
if tt.expectErr {
if err == nil {
t.Errorf("Expected error but got none")
}
return
}
if err != nil {
t.Errorf("Unexpected error: %v", err)
return
}
if result == nil {
t.Errorf("DateTrunc returned nil result")
return
}
timestampVal, ok := result.Kind.(*schema_pb.Value_TimestampValue)
if !ok {
t.Errorf("DateTrunc should return timestamp value, got %T", result.Kind)
return
}
resultTime := time.UnixMicro(timestampVal.TimestampValue.TimestampMicros)
if !tt.expectedCheck(resultTime) {
t.Errorf("DateTrunc result check failed for precision %s, got time: %v", tt.precision, resultTime)
}
})
}
}

131
weed/query/engine/function_helpers.go
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@ -0,0 +1,131 @@
package engine
import (
"fmt"
"strconv"
"time"
"github.com/seaweedfs/seaweedfs/weed/pb/schema_pb"
)
// Helper function to convert schema_pb.Value to float64
func (e *SQLEngine) valueToFloat64(value *schema_pb.Value) (float64, error) {
switch v := value.Kind.(type) {
case *schema_pb.Value_Int32Value:
return float64(v.Int32Value), nil
case *schema_pb.Value_Int64Value:
return float64(v.Int64Value), nil
case *schema_pb.Value_FloatValue:
return float64(v.FloatValue), nil
case *schema_pb.Value_DoubleValue:
return v.DoubleValue, nil
case *schema_pb.Value_StringValue:
// Try to parse string as number
if f, err := strconv.ParseFloat(v.StringValue, 64); err == nil {
return f, nil
}
return 0, fmt.Errorf("cannot convert string '%s' to number", v.StringValue)
case *schema_pb.Value_BoolValue:
if v.BoolValue {
return 1, nil
}
return 0, nil
default:
return 0, fmt.Errorf("cannot convert value type to number")
}
}
// Helper function to check if a value is an integer type
func (e *SQLEngine) isIntegerValue(value *schema_pb.Value) bool {
switch value.Kind.(type) {
case *schema_pb.Value_Int32Value, *schema_pb.Value_Int64Value:
return true
default:
return false
}
}
// Helper function to convert schema_pb.Value to string
func (e *SQLEngine) valueToString(value *schema_pb.Value) (string, error) {
switch v := value.Kind.(type) {
case *schema_pb.Value_StringValue:
return v.StringValue, nil
case *schema_pb.Value_Int32Value:
return strconv.FormatInt(int64(v.Int32Value), 10), nil
case *schema_pb.Value_Int64Value:
return strconv.FormatInt(v.Int64Value, 10), nil
case *schema_pb.Value_FloatValue:
return strconv.FormatFloat(float64(v.FloatValue), 'g', -1, 32), nil
case *schema_pb.Value_DoubleValue:
return strconv.FormatFloat(v.DoubleValue, 'g', -1, 64), nil
case *schema_pb.Value_BoolValue:
if v.BoolValue {
return "true", nil
}
return "false", nil
case *schema_pb.Value_BytesValue:
return string(v.BytesValue), nil
default:
return "", fmt.Errorf("cannot convert value type to string")
}
}
// Helper function to convert schema_pb.Value to int64
func (e *SQLEngine) valueToInt64(value *schema_pb.Value) (int64, error) {
switch v := value.Kind.(type) {
case *schema_pb.Value_Int32Value:
return int64(v.Int32Value), nil
case *schema_pb.Value_Int64Value:
return v.Int64Value, nil
case *schema_pb.Value_FloatValue:
return int64(v.FloatValue), nil
case *schema_pb.Value_DoubleValue:
return int64(v.DoubleValue), nil
case *schema_pb.Value_StringValue:
if i, err := strconv.ParseInt(v.StringValue, 10, 64); err == nil {
return i, nil
}
return 0, fmt.Errorf("cannot convert string '%s' to integer", v.StringValue)
default:
return 0, fmt.Errorf("cannot convert value type to integer")
}
}
// Helper function to convert schema_pb.Value to time.Time
func (e *SQLEngine) valueToTime(value *schema_pb.Value) (time.Time, error) {
switch v := value.Kind.(type) {
case *schema_pb.Value_TimestampValue:
if v.TimestampValue == nil {
return time.Time{}, fmt.Errorf("null timestamp value")
}
return time.UnixMicro(v.TimestampValue.TimestampMicros), nil
case *schema_pb.Value_StringValue:
// Try to parse various date/time string formats
dateFormats := []struct {
format string
useLocal bool
}{
{"2006-01-02 15:04:05", true}, // Local time assumed for non-timezone formats
{"2006-01-02T15:04:05Z", false}, // UTC format
{"2006-01-02T15:04:05", true}, // Local time assumed
{"2006-01-02", true}, // Local time assumed for date only
{"15:04:05", true}, // Local time assumed for time only
}
for _, formatSpec := range dateFormats {
if t, err := time.Parse(formatSpec.format, v.StringValue); err == nil {
if formatSpec.useLocal {
// Convert to local timezone if no timezone was specified
return time.Date(t.Year(), t.Month(), t.Day(), t.Hour(), t.Minute(), t.Second(), t.Nanosecond(), time.Local), nil
}
return t, nil
}
}
return time.Time{}, fmt.Errorf("unable to parse date/time string: %s", v.StringValue)
case *schema_pb.Value_Int64Value:
// Assume Unix timestamp (seconds)
return time.Unix(v.Int64Value, 0), nil
default:
return time.Time{}, fmt.Errorf("cannot convert value type to date/time")
}
}

850
weed/query/engine/sql_functions.go
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@ -1,850 +0,0 @@
package engine
import (
"fmt"
"math"
"strconv"
"strings"
"time"
"github.com/seaweedfs/seaweedfs/weed/pb/schema_pb"
)
// ArithmeticOperator represents basic arithmetic operations
type ArithmeticOperator string
const (
OpAdd ArithmeticOperator = "+"
OpSub ArithmeticOperator = "-"
OpMul ArithmeticOperator = "*"
OpDiv ArithmeticOperator = "/"
OpMod ArithmeticOperator = "%"
)
// EvaluateArithmeticExpression evaluates basic arithmetic operations between two values
func (e *SQLEngine) EvaluateArithmeticExpression(left, right *schema_pb.Value, operator ArithmeticOperator) (*schema_pb.Value, error) {
if left == nil || right == nil {
return nil, fmt.Errorf("arithmetic operation requires non-null operands")
}
// Convert values to numeric types for calculation
leftNum, err := e.valueToFloat64(left)
if err != nil {
return nil, fmt.Errorf("left operand conversion error: %v", err)
}
rightNum, err := e.valueToFloat64(right)
if err != nil {
return nil, fmt.Errorf("right operand conversion error: %v", err)
}
var result float64
var resultErr error
switch operator {
case OpAdd:
result = leftNum + rightNum
case OpSub:
result = leftNum - rightNum
case OpMul:
result = leftNum * rightNum
case OpDiv:
if rightNum == 0 {
return nil, fmt.Errorf("division by zero")
}
result = leftNum / rightNum
case OpMod:
if rightNum == 0 {
return nil, fmt.Errorf("modulo by zero")
}
result = math.Mod(leftNum, rightNum)
default:
return nil, fmt.Errorf("unsupported arithmetic operator: %s", operator)
}
if resultErr != nil {
return nil, resultErr
}
// Convert result back to appropriate schema value type
// If both operands were integers and operation doesn't produce decimal, return integer
if e.isIntegerValue(left) && e.isIntegerValue(right) &&
(operator == OpAdd || operator == OpSub || operator == OpMul || operator == OpMod) {
return &schema_pb.Value{
Kind: &schema_pb.Value_Int64Value{Int64Value: int64(result)},
}, nil
}
// Otherwise return as double/float
return &schema_pb.Value{
Kind: &schema_pb.Value_DoubleValue{DoubleValue: result},
}, nil
}
// Helper function to convert schema_pb.Value to float64
func (e *SQLEngine) valueToFloat64(value *schema_pb.Value) (float64, error) {
switch v := value.Kind.(type) {
case *schema_pb.Value_Int32Value:
return float64(v.Int32Value), nil
case *schema_pb.Value_Int64Value:
return float64(v.Int64Value), nil
case *schema_pb.Value_FloatValue:
return float64(v.FloatValue), nil
case *schema_pb.Value_DoubleValue:
return v.DoubleValue, nil
case *schema_pb.Value_StringValue:
// Try to parse string as number
if f, err := strconv.ParseFloat(v.StringValue, 64); err == nil {
return f, nil
}
return 0, fmt.Errorf("cannot convert string '%s' to number", v.StringValue)
case *schema_pb.Value_BoolValue:
if v.BoolValue {
return 1, nil
}
return 0, nil
default:
return 0, fmt.Errorf("cannot convert value type to number")
}
}
// Helper function to check if a value is an integer type
func (e *SQLEngine) isIntegerValue(value *schema_pb.Value) bool {
switch value.Kind.(type) {
case *schema_pb.Value_Int32Value, *schema_pb.Value_Int64Value:
return true
default:
return false
}
}
// Add evaluates addition (left + right)
func (e *SQLEngine) Add(left, right *schema_pb.Value) (*schema_pb.Value, error) {
return e.EvaluateArithmeticExpression(left, right, OpAdd)
}
// Subtract evaluates subtraction (left - right)
func (e *SQLEngine) Subtract(left, right *schema_pb.Value) (*schema_pb.Value, error) {
return e.EvaluateArithmeticExpression(left, right, OpSub)
}
// Multiply evaluates multiplication (left * right)
func (e *SQLEngine) Multiply(left, right *schema_pb.Value) (*schema_pb.Value, error) {
return e.EvaluateArithmeticExpression(left, right, OpMul)
}
// Divide evaluates division (left / right)
func (e *SQLEngine) Divide(left, right *schema_pb.Value) (*schema_pb.Value, error) {
return e.EvaluateArithmeticExpression(left, right, OpDiv)
}
// Modulo evaluates modulo operation (left % right)
func (e *SQLEngine) Modulo(left, right *schema_pb.Value) (*schema_pb.Value, error) {
return e.EvaluateArithmeticExpression(left, right, OpMod)
}
// ===============================
// MATHEMATICAL FUNCTIONS
// ===============================
// Round rounds a numeric value to the nearest integer or specified decimal places
func (e *SQLEngine) Round(value *schema_pb.Value, precision ...*schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("ROUND function requires non-null value")
}
num, err := e.valueToFloat64(value)
if err != nil {
return nil, fmt.Errorf("ROUND function conversion error: %v", err)
}
// Default precision is 0 (round to integer)
precisionValue := 0
if len(precision) > 0 && precision[0] != nil {
precFloat, err := e.valueToFloat64(precision[0])
if err != nil {
return nil, fmt.Errorf("ROUND precision conversion error: %v", err)
}
precisionValue = int(precFloat)
}
// Apply rounding
multiplier := math.Pow(10, float64(precisionValue))
rounded := math.Round(num*multiplier) / multiplier
// Return as integer if precision is 0 and original was integer, otherwise as double
if precisionValue == 0 && e.isIntegerValue(value) {
return &schema_pb.Value{
Kind: &schema_pb.Value_Int64Value{Int64Value: int64(rounded)},
}, nil
}
return &schema_pb.Value{
Kind: &schema_pb.Value_DoubleValue{DoubleValue: rounded},
}, nil
}
// Ceil returns the smallest integer greater than or equal to the value
func (e *SQLEngine) Ceil(value *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("CEIL function requires non-null value")
}
num, err := e.valueToFloat64(value)
if err != nil {
return nil, fmt.Errorf("CEIL function conversion error: %v", err)
}
result := math.Ceil(num)
return &schema_pb.Value{
Kind: &schema_pb.Value_Int64Value{Int64Value: int64(result)},
}, nil
}
// Floor returns the largest integer less than or equal to the value
func (e *SQLEngine) Floor(value *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("FLOOR function requires non-null value")
}
num, err := e.valueToFloat64(value)
if err != nil {
return nil, fmt.Errorf("FLOOR function conversion error: %v", err)
}
result := math.Floor(num)
return &schema_pb.Value{
Kind: &schema_pb.Value_Int64Value{Int64Value: int64(result)},
}, nil
}
// Abs returns the absolute value of a number
func (e *SQLEngine) Abs(value *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("ABS function requires non-null value")
}
num, err := e.valueToFloat64(value)
if err != nil {
return nil, fmt.Errorf("ABS function conversion error: %v", err)
}
result := math.Abs(num)
// Return same type as input if possible
if e.isIntegerValue(value) {
return &schema_pb.Value{
Kind: &schema_pb.Value_Int64Value{Int64Value: int64(result)},
}, nil
}
// Check if original was float32
if _, ok := value.Kind.(*schema_pb.Value_FloatValue); ok {
return &schema_pb.Value{
Kind: &schema_pb.Value_FloatValue{FloatValue: float32(result)},
}, nil
}
// Default to double
return &schema_pb.Value{
Kind: &schema_pb.Value_DoubleValue{DoubleValue: result},
}, nil
}
// ===============================
// DATE/TIME CONSTANTS
// ===============================
// CurrentDate returns the current date as a string in YYYY-MM-DD format
func (e *SQLEngine) CurrentDate() (*schema_pb.Value, error) {
now := time.Now()
dateStr := now.Format("2006-01-02")
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: dateStr},
}, nil
}
// CurrentTimestamp returns the current timestamp
func (e *SQLEngine) CurrentTimestamp() (*schema_pb.Value, error) {
now := time.Now()
// Return as TimestampValue with microseconds
timestampMicros := now.UnixMicro()
return &schema_pb.Value{
Kind: &schema_pb.Value_TimestampValue{
TimestampValue: &schema_pb.TimestampValue{
TimestampMicros: timestampMicros,
},
},
}, nil
}
// CurrentTime returns the current time as a string in HH:MM:SS format
func (e *SQLEngine) CurrentTime() (*schema_pb.Value, error) {
now := time.Now()
timeStr := now.Format("15:04:05")
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: timeStr},
}, nil
}
// Now is an alias for CurrentTimestamp (common SQL function name)
func (e *SQLEngine) Now() (*schema_pb.Value, error) {
return e.CurrentTimestamp()
}
// ===============================
// EXTRACT FUNCTION
// ===============================
// DatePart represents the part of a date/time to extract
type DatePart string
const (
PartYear DatePart = "YEAR"
PartMonth DatePart = "MONTH"
PartDay DatePart = "DAY"
PartHour DatePart = "HOUR"
PartMinute DatePart = "MINUTE"
PartSecond DatePart = "SECOND"
PartWeek DatePart = "WEEK"
PartDayOfYear DatePart = "DOY"
PartDayOfWeek DatePart = "DOW"
PartQuarter DatePart = "QUARTER"
PartEpoch DatePart = "EPOCH"
)
// Extract extracts a specific part from a date/time value
func (e *SQLEngine) Extract(part DatePart, value *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("EXTRACT function requires non-null value")
}
// Convert value to time
t, err := e.valueToTime(value)
if err != nil {
return nil, fmt.Errorf("EXTRACT function time conversion error: %v", err)
}
var result int64
switch strings.ToUpper(string(part)) {
case string(PartYear):
result = int64(t.Year())
case string(PartMonth):
result = int64(t.Month())
case string(PartDay):
result = int64(t.Day())
case string(PartHour):
result = int64(t.Hour())
case string(PartMinute):
result = int64(t.Minute())
case string(PartSecond):
result = int64(t.Second())
case string(PartWeek):
_, week := t.ISOWeek()
result = int64(week)
case string(PartDayOfYear):
result = int64(t.YearDay())
case string(PartDayOfWeek):
result = int64(t.Weekday())
case string(PartQuarter):
month := t.Month()
result = int64((month-1)/3 + 1)
case string(PartEpoch):
result = t.Unix()
default:
return nil, fmt.Errorf("unsupported date part: %s", part)
}
return &schema_pb.Value{
Kind: &schema_pb.Value_Int64Value{Int64Value: result},
}, nil
}
// Helper function to convert schema_pb.Value to time.Time
func (e *SQLEngine) valueToTime(value *schema_pb.Value) (time.Time, error) {
switch v := value.Kind.(type) {
case *schema_pb.Value_TimestampValue:
if v.TimestampValue == nil {
return time.Time{}, fmt.Errorf("null timestamp value")
}
return time.UnixMicro(v.TimestampValue.TimestampMicros), nil
case *schema_pb.Value_StringValue:
// Try to parse various date/time string formats
dateFormats := []struct {
format string
useLocal bool
}{
{"2006-01-02 15:04:05", true}, // Local time assumed for non-timezone formats
{"2006-01-02T15:04:05Z", false}, // UTC format
{"2006-01-02T15:04:05", true}, // Local time assumed
{"2006-01-02", true}, // Local time assumed for date only
{"15:04:05", true}, // Local time assumed for time only
}
for _, formatSpec := range dateFormats {
if t, err := time.Parse(formatSpec.format, v.StringValue); err == nil {
if formatSpec.useLocal {
// Convert to local timezone if no timezone was specified
return time.Date(t.Year(), t.Month(), t.Day(), t.Hour(), t.Minute(), t.Second(), t.Nanosecond(), time.Local), nil
}
return t, nil
}
}
return time.Time{}, fmt.Errorf("unable to parse date/time string: %s", v.StringValue)
case *schema_pb.Value_Int64Value:
// Assume Unix timestamp (seconds)
return time.Unix(v.Int64Value, 0), nil
default:
return time.Time{}, fmt.Errorf("cannot convert value type to date/time")
}
}
// ===============================
// DATE_TRUNC FUNCTION
// ===============================
// DateTrunc truncates a date/time to the specified precision
func (e *SQLEngine) DateTrunc(precision string, value *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("DATE_TRUNC function requires non-null value")
}
// Convert value to time
t, err := e.valueToTime(value)
if err != nil {
return nil, fmt.Errorf("DATE_TRUNC function time conversion error: %v", err)
}
var truncated time.Time
switch strings.ToLower(precision) {
case "microsecond", "microseconds":
// No truncation needed for microsecond precision
truncated = t
case "millisecond", "milliseconds":
truncated = t.Truncate(time.Millisecond)
case "second", "seconds":
truncated = t.Truncate(time.Second)
case "minute", "minutes":
truncated = t.Truncate(time.Minute)
case "hour", "hours":
truncated = t.Truncate(time.Hour)
case "day", "days":
truncated = time.Date(t.Year(), t.Month(), t.Day(), 0, 0, 0, 0, t.Location())
case "week", "weeks":
// Truncate to beginning of week (Monday)
days := int(t.Weekday())
if days == 0 { // Sunday = 0, adjust to make Monday = 0
days = 6
} else {
days = days - 1
}
truncated = time.Date(t.Year(), t.Month(), t.Day()-days, 0, 0, 0, 0, t.Location())
case "month", "months":
truncated = time.Date(t.Year(), t.Month(), 1, 0, 0, 0, 0, t.Location())
case "quarter", "quarters":
month := t.Month()
quarterMonth := ((int(month)-1)/3)*3 + 1
truncated = time.Date(t.Year(), time.Month(quarterMonth), 1, 0, 0, 0, 0, t.Location())
case "year", "years":
truncated = time.Date(t.Year(), 1, 1, 0, 0, 0, 0, t.Location())
case "decade", "decades":
year := (t.Year()/10) * 10
truncated = time.Date(year, 1, 1, 0, 0, 0, 0, t.Location())
case "century", "centuries":
year := ((t.Year()-1)/100)*100 + 1
truncated = time.Date(year, 1, 1, 0, 0, 0, 0, t.Location())
case "millennium", "millennia":
year := ((t.Year()-1)/1000)*1000 + 1
truncated = time.Date(year, 1, 1, 0, 0, 0, 0, t.Location())
default:
return nil, fmt.Errorf("unsupported date truncation precision: %s", precision)
}
// Return as TimestampValue
return &schema_pb.Value{
Kind: &schema_pb.Value_TimestampValue{
TimestampValue: &schema_pb.TimestampValue{
TimestampMicros: truncated.UnixMicro(),
},
},
}, nil
}
// ===============================
// STRING FUNCTIONS
// ===============================
// Length returns the length of a string
func (e *SQLEngine) Length(value *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("LENGTH function requires non-null value")
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("LENGTH function conversion error: %v", err)
}
length := int64(len(str))
return &schema_pb.Value{
Kind: &schema_pb.Value_Int64Value{Int64Value: length},
}, nil
}
// Upper converts a string to uppercase
func (e *SQLEngine) Upper(value *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("UPPER function requires non-null value")
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("UPPER function conversion error: %v", err)
}
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: strings.ToUpper(str)},
}, nil
}
// Lower converts a string to lowercase
func (e *SQLEngine) Lower(value *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("LOWER function requires non-null value")
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("LOWER function conversion error: %v", err)
}
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: strings.ToLower(str)},
}, nil
}
// Trim removes leading and trailing whitespace from a string
func (e *SQLEngine) Trim(value *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("TRIM function requires non-null value")
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("TRIM function conversion error: %v", err)
}
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: strings.TrimSpace(str)},
}, nil
}
// LTrim removes leading whitespace from a string
func (e *SQLEngine) LTrim(value *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("LTRIM function requires non-null value")
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("LTRIM function conversion error: %v", err)
}
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: strings.TrimLeft(str, " \t\n\r")},
}, nil
}
// RTrim removes trailing whitespace from a string
func (e *SQLEngine) RTrim(value *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("RTRIM function requires non-null value")
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("RTRIM function conversion error: %v", err)
}
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: strings.TrimRight(str, " \t\n\r")},
}, nil
}
// Substring extracts a substring from a string
func (e *SQLEngine) Substring(value *schema_pb.Value, start *schema_pb.Value, length ...*schema_pb.Value) (*schema_pb.Value, error) {
if value == nil || start == nil {
return nil, fmt.Errorf("SUBSTRING function requires non-null value and start position")
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("SUBSTRING function value conversion error: %v", err)
}
startPos, err := e.valueToInt64(start)
if err != nil {
return nil, fmt.Errorf("SUBSTRING function start position conversion error: %v", err)
}
// Convert to 0-based indexing (SQL uses 1-based)
if startPos < 1 {
startPos = 1
}
startIdx := int(startPos - 1)
if startIdx >= len(str) {
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: ""},
}, nil
}
var result string
if len(length) > 0 && length[0] != nil {
lengthVal, err := e.valueToInt64(length[0])
if err != nil {
return nil, fmt.Errorf("SUBSTRING function length conversion error: %v", err)
}
if lengthVal <= 0 {
result = ""
} else {
endIdx := startIdx + int(lengthVal)
if endIdx > len(str) {
endIdx = len(str)
}
result = str[startIdx:endIdx]
}
} else {
result = str[startIdx:]
}
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: result},
}, nil
}
// Concat concatenates multiple strings
func (e *SQLEngine) Concat(values ...*schema_pb.Value) (*schema_pb.Value, error) {
if len(values) == 0 {
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: ""},
}, nil
}
var result strings.Builder
for i, value := range values {
if value == nil {
continue // Skip null values
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("CONCAT function value %d conversion error: %v", i, err)
}
result.WriteString(str)
}
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: result.String()},
}, nil
}
// Replace replaces all occurrences of a substring with another substring
func (e *SQLEngine) Replace(value, oldStr, newStr *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil || oldStr == nil || newStr == nil {
return nil, fmt.Errorf("REPLACE function requires non-null values")
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("REPLACE function value conversion error: %v", err)
}
old, err := e.valueToString(oldStr)
if err != nil {
return nil, fmt.Errorf("REPLACE function old string conversion error: %v", err)
}
new, err := e.valueToString(newStr)
if err != nil {
return nil, fmt.Errorf("REPLACE function new string conversion error: %v", err)
}
result := strings.ReplaceAll(str, old, new)
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: result},
}, nil
}
// Position returns the position of a substring in a string (1-based, 0 if not found)
func (e *SQLEngine) Position(substring, value *schema_pb.Value) (*schema_pb.Value, error) {
if substring == nil || value == nil {
return nil, fmt.Errorf("POSITION function requires non-null values")
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("POSITION function string conversion error: %v", err)
}
substr, err := e.valueToString(substring)
if err != nil {
return nil, fmt.Errorf("POSITION function substring conversion error: %v", err)
}
pos := strings.Index(str, substr)
if pos == -1 {
pos = 0 // SQL returns 0 for not found
} else {
pos = pos + 1 // Convert to 1-based indexing
}
return &schema_pb.Value{
Kind: &schema_pb.Value_Int64Value{Int64Value: int64(pos)},
}, nil
}
// Left returns the leftmost characters of a string
func (e *SQLEngine) Left(value *schema_pb.Value, length *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil || length == nil {
return nil, fmt.Errorf("LEFT function requires non-null values")
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("LEFT function string conversion error: %v", err)
}
lengthVal, err := e.valueToInt64(length)
if err != nil {
return nil, fmt.Errorf("LEFT function length conversion error: %v", err)
}
if lengthVal <= 0 {
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: ""},
}, nil
}
if int(lengthVal) >= len(str) {
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: str},
}, nil
}
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: str[:lengthVal]},
}, nil
}
// Right returns the rightmost characters of a string
func (e *SQLEngine) Right(value *schema_pb.Value, length *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil || length == nil {
return nil, fmt.Errorf("RIGHT function requires non-null values")
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("RIGHT function string conversion error: %v", err)
}
lengthVal, err := e.valueToInt64(length)
if err != nil {
return nil, fmt.Errorf("RIGHT function length conversion error: %v", err)
}
if lengthVal <= 0 {
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: ""},
}, nil
}
if int(lengthVal) >= len(str) {
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: str},
}, nil
}
startPos := len(str) - int(lengthVal)
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: str[startPos:]},
}, nil
}
// Reverse reverses a string
func (e *SQLEngine) Reverse(value *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("REVERSE function requires non-null value")
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("REVERSE function conversion error: %v", err)
}
// Reverse the string rune by rune to handle Unicode correctly
runes := []rune(str)
for i, j := 0, len(runes)-1; i < j; i, j = i+1, j-1 {
runes[i], runes[j] = runes[j], runes[i]
}
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: string(runes)},
}, nil
}
// Helper function to convert schema_pb.Value to string
func (e *SQLEngine) valueToString(value *schema_pb.Value) (string, error) {
switch v := value.Kind.(type) {
case *schema_pb.Value_StringValue:
return v.StringValue, nil
case *schema_pb.Value_Int32Value:
return strconv.FormatInt(int64(v.Int32Value), 10), nil
case *schema_pb.Value_Int64Value:
return strconv.FormatInt(v.Int64Value, 10), nil
case *schema_pb.Value_FloatValue:
return strconv.FormatFloat(float64(v.FloatValue), 'g', -1, 32), nil
case *schema_pb.Value_DoubleValue:
return strconv.FormatFloat(v.DoubleValue, 'g', -1, 64), nil
case *schema_pb.Value_BoolValue:
if v.BoolValue {
return "true", nil
}
return "false", nil
case *schema_pb.Value_BytesValue:
return string(v.BytesValue), nil
default:
return "", fmt.Errorf("cannot convert value type to string")
}
}
// Helper function to convert schema_pb.Value to int64
func (e *SQLEngine) valueToInt64(value *schema_pb.Value) (int64, error) {
switch v := value.Kind.(type) {
case *schema_pb.Value_Int32Value:
return int64(v.Int32Value), nil
case *schema_pb.Value_Int64Value:
return v.Int64Value, nil
case *schema_pb.Value_FloatValue:
return int64(v.FloatValue), nil
case *schema_pb.Value_DoubleValue:
return int64(v.DoubleValue), nil
case *schema_pb.Value_StringValue:
if i, err := strconv.ParseInt(v.StringValue, 10, 64); err == nil {
return i, nil
}
return 0, fmt.Errorf("cannot convert string '%s' to integer", v.StringValue)
default:
return 0, fmt.Errorf("cannot convert value type to integer")
}
}

1205
weed/query/engine/sql_functions_test.go
File diff suppressed because it is too large
View File

333
weed/query/engine/string_functions.go
View File

@ -0,0 +1,333 @@
package engine
import (
"fmt"
"strings"
"github.com/seaweedfs/seaweedfs/weed/pb/schema_pb"
)
// ===============================
// STRING FUNCTIONS
// ===============================
// Length returns the length of a string
func (e *SQLEngine) Length(value *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("LENGTH function requires non-null value")
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("LENGTH function conversion error: %v", err)
}
length := int64(len(str))
return &schema_pb.Value{
Kind: &schema_pb.Value_Int64Value{Int64Value: length},
}, nil
}
// Upper converts a string to uppercase
func (e *SQLEngine) Upper(value *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("UPPER function requires non-null value")
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("UPPER function conversion error: %v", err)
}
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: strings.ToUpper(str)},
}, nil
}
// Lower converts a string to lowercase
func (e *SQLEngine) Lower(value *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("LOWER function requires non-null value")
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("LOWER function conversion error: %v", err)
}
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: strings.ToLower(str)},
}, nil
}
// Trim removes leading and trailing whitespace from a string
func (e *SQLEngine) Trim(value *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("TRIM function requires non-null value")
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("TRIM function conversion error: %v", err)
}
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: strings.TrimSpace(str)},
}, nil
}
// LTrim removes leading whitespace from a string
func (e *SQLEngine) LTrim(value *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("LTRIM function requires non-null value")
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("LTRIM function conversion error: %v", err)
}
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: strings.TrimLeft(str, " \t\n\r")},
}, nil
}
// RTrim removes trailing whitespace from a string
func (e *SQLEngine) RTrim(value *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("RTRIM function requires non-null value")
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("RTRIM function conversion error: %v", err)
}
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: strings.TrimRight(str, " \t\n\r")},
}, nil
}
// Substring extracts a substring from a string
func (e *SQLEngine) Substring(value *schema_pb.Value, start *schema_pb.Value, length ...*schema_pb.Value) (*schema_pb.Value, error) {
if value == nil || start == nil {
return nil, fmt.Errorf("SUBSTRING function requires non-null value and start position")
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("SUBSTRING function value conversion error: %v", err)
}
startPos, err := e.valueToInt64(start)
if err != nil {
return nil, fmt.Errorf("SUBSTRING function start position conversion error: %v", err)
}
// Convert to 0-based indexing (SQL uses 1-based)
if startPos < 1 {
startPos = 1
}
startIdx := int(startPos - 1)
if startIdx >= len(str) {
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: ""},
}, nil
}
var result string
if len(length) > 0 && length[0] != nil {
lengthVal, err := e.valueToInt64(length[0])
if err != nil {
return nil, fmt.Errorf("SUBSTRING function length conversion error: %v", err)
}
if lengthVal <= 0 {
result = ""
} else {
endIdx := startIdx + int(lengthVal)
if endIdx > len(str) {
endIdx = len(str)
}
result = str[startIdx:endIdx]
}
} else {
result = str[startIdx:]
}
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: result},
}, nil
}
// Concat concatenates multiple strings
func (e *SQLEngine) Concat(values ...*schema_pb.Value) (*schema_pb.Value, error) {
if len(values) == 0 {
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: ""},
}, nil
}
var result strings.Builder
for i, value := range values {
if value == nil {
continue // Skip null values
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("CONCAT function value %d conversion error: %v", i, err)
}
result.WriteString(str)
}
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: result.String()},
}, nil
}
// Replace replaces all occurrences of a substring with another substring
func (e *SQLEngine) Replace(value, oldStr, newStr *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil || oldStr == nil || newStr == nil {
return nil, fmt.Errorf("REPLACE function requires non-null values")
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("REPLACE function value conversion error: %v", err)
}
old, err := e.valueToString(oldStr)
if err != nil {
return nil, fmt.Errorf("REPLACE function old string conversion error: %v", err)
}
new, err := e.valueToString(newStr)
if err != nil {
return nil, fmt.Errorf("REPLACE function new string conversion error: %v", err)
}
result := strings.ReplaceAll(str, old, new)
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: result},
}, nil
}
// Position returns the position of a substring in a string (1-based, 0 if not found)
func (e *SQLEngine) Position(substring, value *schema_pb.Value) (*schema_pb.Value, error) {
if substring == nil || value == nil {
return nil, fmt.Errorf("POSITION function requires non-null values")
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("POSITION function string conversion error: %v", err)
}
substr, err := e.valueToString(substring)
if err != nil {
return nil, fmt.Errorf("POSITION function substring conversion error: %v", err)
}
pos := strings.Index(str, substr)
if pos == -1 {
pos = 0 // SQL returns 0 for not found
} else {
pos = pos + 1 // Convert to 1-based indexing
}
return &schema_pb.Value{
Kind: &schema_pb.Value_Int64Value{Int64Value: int64(pos)},
}, nil
}
// Left returns the leftmost characters of a string
func (e *SQLEngine) Left(value *schema_pb.Value, length *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil || length == nil {
return nil, fmt.Errorf("LEFT function requires non-null values")
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("LEFT function string conversion error: %v", err)
}
lengthVal, err := e.valueToInt64(length)
if err != nil {
return nil, fmt.Errorf("LEFT function length conversion error: %v", err)
}
if lengthVal <= 0 {
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: ""},
}, nil
}
if int(lengthVal) >= len(str) {
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: str},
}, nil
}
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: str[:lengthVal]},
}, nil
}
// Right returns the rightmost characters of a string
func (e *SQLEngine) Right(value *schema_pb.Value, length *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil || length == nil {
return nil, fmt.Errorf("RIGHT function requires non-null values")
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("RIGHT function string conversion error: %v", err)
}
lengthVal, err := e.valueToInt64(length)
if err != nil {
return nil, fmt.Errorf("RIGHT function length conversion error: %v", err)
}
if lengthVal <= 0 {
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: ""},
}, nil
}
if int(lengthVal) >= len(str) {
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: str},
}, nil
}
startPos := len(str) - int(lengthVal)
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: str[startPos:]},
}, nil
}
// Reverse reverses a string
func (e *SQLEngine) Reverse(value *schema_pb.Value) (*schema_pb.Value, error) {
if value == nil {
return nil, fmt.Errorf("REVERSE function requires non-null value")
}
str, err := e.valueToString(value)
if err != nil {
return nil, fmt.Errorf("REVERSE function conversion error: %v", err)
}
// Reverse the string rune by rune to handle Unicode correctly
runes := []rune(str)
for i, j := 0, len(runes)-1; i < j; i, j = i+1, j-1 {
runes[i], runes[j] = runes[j], runes[i]
}
return &schema_pb.Value{
Kind: &schema_pb.Value_StringValue{StringValue: string(runes)},
}, nil
}

271
weed/query/engine/string_functions_test.go
View File

@ -0,0 +1,271 @@
package engine
import (
"testing"
"github.com/seaweedfs/seaweedfs/weed/pb/schema_pb"
)
func TestStringFunctions(t *testing.T) {
engine := NewTestSQLEngine()
t.Run("LENGTH function tests", func(t *testing.T) {
tests := []struct {
name string
value *schema_pb.Value
expected int64
expectErr bool
}{
{
name: "Length of string",
value: &schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "Hello World"}},
expected: 11,
expectErr: false,
},
{
name: "Length of empty string",
value: &schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: ""}},
expected: 0,
expectErr: false,
},
{
name: "Length of number",
value: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 12345}},
expected: 5,
expectErr: false,
},
{
name: "Length of null value",
value: nil,
expected: 0,
expectErr: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result, err := engine.Length(tt.value)
if tt.expectErr {
if err == nil {
t.Errorf("Expected error but got none")
}
return
}
if err != nil {
t.Errorf("Unexpected error: %v", err)
return
}
intVal, ok := result.Kind.(*schema_pb.Value_Int64Value)
if !ok {
t.Errorf("LENGTH should return int64 value, got %T", result.Kind)
return
}
if intVal.Int64Value != tt.expected {
t.Errorf("Expected %d, got %d", tt.expected, intVal.Int64Value)
}
})
}
})
t.Run("UPPER/LOWER function tests", func(t *testing.T) {
// Test UPPER
result, err := engine.Upper(&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "Hello World"}})
if err != nil {
t.Errorf("UPPER failed: %v", err)
}
stringVal, _ := result.Kind.(*schema_pb.Value_StringValue)
if stringVal.StringValue != "HELLO WORLD" {
t.Errorf("Expected 'HELLO WORLD', got '%s'", stringVal.StringValue)
}
// Test LOWER
result, err = engine.Lower(&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "Hello World"}})
if err != nil {
t.Errorf("LOWER failed: %v", err)
}
stringVal, _ = result.Kind.(*schema_pb.Value_StringValue)
if stringVal.StringValue != "hello world" {
t.Errorf("Expected 'hello world', got '%s'", stringVal.StringValue)
}
})
t.Run("TRIM function tests", func(t *testing.T) {
tests := []struct {
name string
function func(*schema_pb.Value) (*schema_pb.Value, error)
input string
expected string
}{
{"TRIM whitespace", engine.Trim, " Hello World ", "Hello World"},
{"LTRIM whitespace", engine.LTrim, " Hello World ", "Hello World "},
{"RTRIM whitespace", engine.RTrim, " Hello World ", " Hello World"},
{"TRIM with tabs and newlines", engine.Trim, "\t\nHello\t\n", "Hello"},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result, err := tt.function(&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: tt.input}})
if err != nil {
t.Errorf("Function failed: %v", err)
return
}
stringVal, ok := result.Kind.(*schema_pb.Value_StringValue)
if !ok {
t.Errorf("Function should return string value, got %T", result.Kind)
return
}
if stringVal.StringValue != tt.expected {
t.Errorf("Expected '%s', got '%s'", tt.expected, stringVal.StringValue)
}
})
}
})
t.Run("SUBSTRING function tests", func(t *testing.T) {
testStr := &schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "Hello World"}}
// Test substring with start and length
result, err := engine.Substring(testStr,
&schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 7}},
&schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 5}})
if err != nil {
t.Errorf("SUBSTRING failed: %v", err)
}
stringVal, _ := result.Kind.(*schema_pb.Value_StringValue)
if stringVal.StringValue != "World" {
t.Errorf("Expected 'World', got '%s'", stringVal.StringValue)
}
// Test substring with just start position
result, err = engine.Substring(testStr,
&schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 7}})
if err != nil {
t.Errorf("SUBSTRING failed: %v", err)
}
stringVal, _ = result.Kind.(*schema_pb.Value_StringValue)
if stringVal.StringValue != "World" {
t.Errorf("Expected 'World', got '%s'", stringVal.StringValue)
}
})
t.Run("CONCAT function tests", func(t *testing.T) {
result, err := engine.Concat(
&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "Hello"}},
&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: " "}},
&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "World"}},
)
if err != nil {
t.Errorf("CONCAT failed: %v", err)
}
stringVal, _ := result.Kind.(*schema_pb.Value_StringValue)
if stringVal.StringValue != "Hello World" {
t.Errorf("Expected 'Hello World', got '%s'", stringVal.StringValue)
}
// Test with mixed types
result, err = engine.Concat(
&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "Number: "}},
&schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 42}},
)
if err != nil {
t.Errorf("CONCAT failed: %v", err)
}
stringVal, _ = result.Kind.(*schema_pb.Value_StringValue)
if stringVal.StringValue != "Number: 42" {
t.Errorf("Expected 'Number: 42', got '%s'", stringVal.StringValue)
}
})
t.Run("REPLACE function tests", func(t *testing.T) {
result, err := engine.Replace(
&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "Hello World World"}},
&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "World"}},
&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "Universe"}},
)
if err != nil {
t.Errorf("REPLACE failed: %v", err)
}
stringVal, _ := result.Kind.(*schema_pb.Value_StringValue)
if stringVal.StringValue != "Hello Universe Universe" {
t.Errorf("Expected 'Hello Universe Universe', got '%s'", stringVal.StringValue)
}
})
t.Run("POSITION function tests", func(t *testing.T) {
result, err := engine.Position(
&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "World"}},
&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "Hello World"}},
)
if err != nil {
t.Errorf("POSITION failed: %v", err)
}
intVal, _ := result.Kind.(*schema_pb.Value_Int64Value)
if intVal.Int64Value != 7 {
t.Errorf("Expected 7, got %d", intVal.Int64Value)
}
// Test not found
result, err = engine.Position(
&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "NotFound"}},
&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "Hello World"}},
)
if err != nil {
t.Errorf("POSITION failed: %v", err)
}
intVal, _ = result.Kind.(*schema_pb.Value_Int64Value)
if intVal.Int64Value != 0 {
t.Errorf("Expected 0 for not found, got %d", intVal.Int64Value)
}
})
t.Run("LEFT/RIGHT function tests", func(t *testing.T) {
testStr := &schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "Hello World"}}
// Test LEFT
result, err := engine.Left(testStr, &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 5}})
if err != nil {
t.Errorf("LEFT failed: %v", err)
}
stringVal, _ := result.Kind.(*schema_pb.Value_StringValue)
if stringVal.StringValue != "Hello" {
t.Errorf("Expected 'Hello', got '%s'", stringVal.StringValue)
}
// Test RIGHT
result, err = engine.Right(testStr, &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 5}})
if err != nil {
t.Errorf("RIGHT failed: %v", err)
}
stringVal, _ = result.Kind.(*schema_pb.Value_StringValue)
if stringVal.StringValue != "World" {
t.Errorf("Expected 'World', got '%s'", stringVal.StringValue)
}
})
t.Run("REVERSE function tests", func(t *testing.T) {
result, err := engine.Reverse(&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "Hello"}})
if err != nil {
t.Errorf("REVERSE failed: %v", err)
}
stringVal, _ := result.Kind.(*schema_pb.Value_StringValue)
if stringVal.StringValue != "olleH" {
t.Errorf("Expected 'olleH', got '%s'", stringVal.StringValue)
}
// Test with Unicode
result, err = engine.Reverse(&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "🙂👍"}})
if err != nil {
t.Errorf("REVERSE failed: %v", err)
}
stringVal, _ = result.Kind.(*schema_pb.Value_StringValue)
if stringVal.StringValue != "👍🙂" {
t.Errorf("Expected '👍🙂', got '%s'", stringVal.StringValue)
}
})
}
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