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67 lines
2.8 KiB
67 lines
2.8 KiB
package schema
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import (
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"sort"
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"github.com/seaweedfs/seaweedfs/weed/pb/schema_pb"
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)
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var (
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// Basic scalar types
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TypeBoolean = &schema_pb.Type{Kind: &schema_pb.Type_ScalarType{schema_pb.ScalarType_BOOL}}
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TypeInt32 = &schema_pb.Type{Kind: &schema_pb.Type_ScalarType{schema_pb.ScalarType_INT32}}
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TypeInt64 = &schema_pb.Type{Kind: &schema_pb.Type_ScalarType{schema_pb.ScalarType_INT64}}
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TypeFloat = &schema_pb.Type{Kind: &schema_pb.Type_ScalarType{schema_pb.ScalarType_FLOAT}}
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TypeDouble = &schema_pb.Type{Kind: &schema_pb.Type_ScalarType{schema_pb.ScalarType_DOUBLE}}
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TypeBytes = &schema_pb.Type{Kind: &schema_pb.Type_ScalarType{schema_pb.ScalarType_BYTES}}
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TypeString = &schema_pb.Type{Kind: &schema_pb.Type_ScalarType{schema_pb.ScalarType_STRING}}
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// Parquet logical types
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TypeTimestamp = &schema_pb.Type{Kind: &schema_pb.Type_ScalarType{schema_pb.ScalarType_TIMESTAMP}}
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TypeDate = &schema_pb.Type{Kind: &schema_pb.Type_ScalarType{schema_pb.ScalarType_DATE}}
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TypeDecimal = &schema_pb.Type{Kind: &schema_pb.Type_ScalarType{schema_pb.ScalarType_DECIMAL}}
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TypeTime = &schema_pb.Type{Kind: &schema_pb.Type_ScalarType{schema_pb.ScalarType_TIME}}
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)
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type RecordTypeBuilder struct {
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recordType *schema_pb.RecordType
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}
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// RecordTypeBegin creates a new RecordTypeBuilder, it should be followed by a series of WithField methods and RecordTypeEnd
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func RecordTypeBegin() *RecordTypeBuilder {
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return &RecordTypeBuilder{recordType: &schema_pb.RecordType{}}
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}
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// RecordTypeEnd finishes the building of a RecordValue
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func (rtb *RecordTypeBuilder) RecordTypeEnd() *schema_pb.RecordType {
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// be consistent with parquet.node.go `func (g Group) Fields() []Field`
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sort.Slice(rtb.recordType.Fields, func(i, j int) bool {
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return rtb.recordType.Fields[i].Name < rtb.recordType.Fields[j].Name
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})
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return rtb.recordType
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}
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// NewRecordTypeBuilder creates a new RecordTypeBuilder from an existing RecordType, it should be followed by a series of WithField methods and RecordTypeEnd
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func NewRecordTypeBuilder(recordType *schema_pb.RecordType) (rtb *RecordTypeBuilder) {
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return &RecordTypeBuilder{recordType: recordType}
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}
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func (rtb *RecordTypeBuilder) WithField(name string, scalarType *schema_pb.Type) *RecordTypeBuilder {
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rtb.recordType.Fields = append(rtb.recordType.Fields, &schema_pb.Field{
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Name: name,
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Type: scalarType,
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})
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return rtb
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}
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func (rtb *RecordTypeBuilder) WithRecordField(name string, recordType *schema_pb.RecordType) *RecordTypeBuilder {
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rtb.recordType.Fields = append(rtb.recordType.Fields, &schema_pb.Field{
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Name: name,
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Type: &schema_pb.Type{Kind: &schema_pb.Type_RecordType{RecordType: recordType}},
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})
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return rtb
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}
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func ListOf(elementType *schema_pb.Type) *schema_pb.Type {
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return &schema_pb.Type{Kind: &schema_pb.Type_ListType{ListType: &schema_pb.ListType{ElementType: elementType}}}
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}
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