Mirror
/
seaweedfs
mirror of https://github.com/seaweedfs/seaweedfs.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
Browse Source

read broker, logs, and parquet files

pull/7185/head
chrislu 2 months ago
parent
59ec4eb68a
commit
60066a6a4c
2 changed files with 210 additions and 15 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 22
      weed/mq/logstore/merged_read.go
  2. 203
      weed/query/engine/engine.go

22
weed/mq/logstore/merged_read.go
View File

@ -9,17 +9,19 @@ import (
func GenMergedReadFunc(filerClient filer_pb.FilerClient, t topic.Topic, p topic.Partition) log_buffer.LogReadFromDiskFuncType {
fromParquetFn := GenParquetReadFunc(filerClient, t, p)
readLogDirectFn := GenLogOnDiskReadFunc(filerClient, t, p)
return mergeReadFuncs(fromParquetFn, readLogDirectFn)
// Reversed order: live logs first (recent), then Parquet files (historical)
// This provides better performance for real-time analytics queries
return mergeReadFuncs(readLogDirectFn, fromParquetFn)
}
func mergeReadFuncs(fromParquetFn, readLogDirectFn log_buffer.LogReadFromDiskFuncType) log_buffer.LogReadFromDiskFuncType {
var exhaustedParquet bool
func mergeReadFuncs(readLogDirectFn, fromParquetFn log_buffer.LogReadFromDiskFuncType) log_buffer.LogReadFromDiskFuncType {
var exhaustedLiveLogs bool
var lastProcessedPosition log_buffer.MessagePosition
return func(startPosition log_buffer.MessagePosition, stopTsNs int64, eachLogEntryFn log_buffer.EachLogEntryFuncType) (lastReadPosition log_buffer.MessagePosition, isDone bool, err error) {
if !exhaustedParquet {
// glog.V(4).Infof("reading from parquet startPosition: %v\n", startPosition.UTC())
lastReadPosition, isDone, err = fromParquetFn(startPosition, stopTsNs, eachLogEntryFn)
// glog.V(4).Infof("read from parquet: %v %v %v %v\n", startPosition, lastReadPosition, isDone, err)
if !exhaustedLiveLogs {
// glog.V(4).Infof("reading from live logs startPosition: %v\n", startPosition.UTC())
lastReadPosition, isDone, err = readLogDirectFn(startPosition, stopTsNs, eachLogEntryFn)
// glog.V(4).Infof("read from live logs: %v %v %v %v\n", startPosition, lastReadPosition, isDone, err)
if isDone {
isDone = false
}
@ -28,14 +30,14 @@ func mergeReadFuncs(fromParquetFn, readLogDirectFn log_buffer.LogReadFromDiskFun
}
lastProcessedPosition = lastReadPosition
}
exhaustedParquet = true
exhaustedLiveLogs = true
if startPosition.Before(lastProcessedPosition.Time) {
startPosition = lastProcessedPosition
}
// glog.V(4).Infof("reading from direct log startPosition: %v\n", startPosition.UTC())
lastReadPosition, isDone, err = readLogDirectFn(startPosition, stopTsNs, eachLogEntryFn)
// glog.V(4).Infof("reading from parquet startPosition: %v\n", startPosition.UTC())
lastReadPosition, isDone, err = fromParquetFn(startPosition, stopTsNs, eachLogEntryFn)
return
}
}

203
weed/query/engine/engine.go
View File

@ -500,8 +500,8 @@ func (e *SQLEngine) executeSelectStatementWithPlan(ctx context.Context, stmt *sq
// Execute aggregation query with plan tracking
result, err = e.executeAggregationQueryWithPlan(ctx, hybridScanner, aggregations, stmt, plan)
} else {
// Regular SELECT query
result, err = e.executeSelectStatement(ctx, stmt)
// Regular SELECT query with plan tracking
result, err = e.executeSelectStatementWithBrokerStats(ctx, stmt, plan)
}
if err == nil && result != nil {
@ -834,6 +834,198 @@ func (e *SQLEngine) executeSelectStatement(ctx context.Context, stmt *sqlparser.
return hybridScanner.ConvertToSQLResult(results, columns), nil
}
// executeSelectStatementWithBrokerStats handles SELECT queries with broker buffer statistics capture
// This is used by EXPLAIN queries to capture complete data source information including broker memory
func (e *SQLEngine) executeSelectStatementWithBrokerStats(ctx context.Context, stmt *sqlparser.Select, plan *QueryExecutionPlan) (*QueryResult, error) {
// Parse FROM clause to get table (topic) information
if len(stmt.From) != 1 {
err := fmt.Errorf("SELECT supports single table queries only")
return &QueryResult{Error: err}, err
}
// Extract table reference
var database, tableName string
switch table := stmt.From[0].(type) {
case *sqlparser.AliasedTableExpr:
switch tableExpr := table.Expr.(type) {
case sqlparser.TableName:
tableName = tableExpr.Name.String()
if tableExpr.Qualifier.String() != "" {
database = tableExpr.Qualifier.String()
}
default:
err := fmt.Errorf("unsupported table expression: %T", tableExpr)
return &QueryResult{Error: err}, err
}
default:
err := fmt.Errorf("unsupported FROM clause: %T", table)
return &QueryResult{Error: err}, err
}
// Use current database context if not specified
if database == "" {
database = e.catalog.GetCurrentDatabase()
if database == "" {
database = "default"
}
}
// Auto-discover and register topic if not already in catalog
if _, err := e.catalog.GetTableInfo(database, tableName); err != nil {
// Topic not in catalog, try to discover and register it
if regErr := e.discoverAndRegisterTopic(ctx, database, tableName); regErr != nil {
// Return error immediately for non-existent topics instead of falling back to sample data
return &QueryResult{Error: regErr}, regErr
}
}
// Create HybridMessageScanner for the topic (reads both live logs + Parquet files)
// Get filerClient from broker connection (works with both real and mock brokers)
var filerClient filer_pb.FilerClient
var filerClientErr error
filerClient, filerClientErr = e.catalog.brokerClient.GetFilerClient()
if filerClientErr != nil {
// Return error if filer client is not available for topic access
return &QueryResult{Error: filerClientErr}, filerClientErr
}
hybridScanner, err := NewHybridMessageScanner(filerClient, e.catalog.brokerClient, database, tableName)
if err != nil {
// Return error for topic access issues instead of misleading sample data
topicErr := fmt.Errorf("failed to access topic %s.%s: %v", database, tableName, err)
return &QueryResult{Error: topicErr}, topicErr
}
// Parse SELECT columns and detect aggregation functions
var columns []string
var aggregations []AggregationSpec
selectAll := false
hasAggregations := false
for _, selectExpr := range stmt.SelectExprs {
switch expr := selectExpr.(type) {
case *sqlparser.StarExpr:
selectAll = true
case *sqlparser.AliasedExpr:
switch col := expr.Expr.(type) {
case *sqlparser.ColName:
columns = append(columns, col.Name.String())
case *sqlparser.FuncExpr:
// Handle aggregation functions
aggSpec, err := e.parseAggregationFunction(col, expr)
if err != nil {
return &QueryResult{Error: err}, err
}
aggregations = append(aggregations, *aggSpec)
hasAggregations = true
default:
err := fmt.Errorf("unsupported SELECT expression: %T", col)
return &QueryResult{Error: err}, err
}
default:
err := fmt.Errorf("unsupported SELECT expression: %T", expr)
return &QueryResult{Error: err}, err
}
}
// If we have aggregations, use aggregation query path
if hasAggregations {
return e.executeAggregationQuery(ctx, hybridScanner, aggregations, stmt)
}
// Parse WHERE clause for predicate pushdown
var predicate func(*schema_pb.RecordValue) bool
if stmt.Where != nil {
predicate, err = e.buildPredicate(stmt.Where.Expr)
if err != nil {
return &QueryResult{Error: err}, err
}
}
// Parse LIMIT clause
limit := 0
if stmt.Limit != nil && stmt.Limit.Rowcount != nil {
switch limitExpr := stmt.Limit.Rowcount.(type) {
case *sqlparser.SQLVal:
if limitExpr.Type == sqlparser.IntVal {
var parseErr error
limit64, parseErr := strconv.ParseInt(string(limitExpr.Val), 10, 64)
if parseErr != nil {
return &QueryResult{Error: parseErr}, parseErr
}
if limit64 > math.MaxInt32 || limit64 < 0 {
return &QueryResult{Error: fmt.Errorf("LIMIT value %d is out of valid range", limit64)}, fmt.Errorf("LIMIT value %d is out of valid range", limit64)
}
limit = int(limit64)
}
}
}
// Build hybrid scan options
// RESOLVED TODO: Extract from WHERE clause time filters
startTimeNs, stopTimeNs := int64(0), int64(0)
if stmt.Where != nil {
startTimeNs, stopTimeNs = e.extractTimeFilters(stmt.Where.Expr)
}
hybridScanOptions := HybridScanOptions{
StartTimeNs: startTimeNs, // Extracted from WHERE clause time comparisons
StopTimeNs: stopTimeNs, // Extracted from WHERE clause time comparisons
Limit: limit,
Predicate: predicate,
}
if !selectAll {
hybridScanOptions.Columns = columns
}
// Execute the hybrid scan with stats capture for EXPLAIN
var results []HybridScanResult
if plan != nil {
// EXPLAIN mode - capture broker buffer stats
var stats *HybridScanStats
results, stats, err = hybridScanner.ScanWithStats(ctx, hybridScanOptions)
if err != nil {
return &QueryResult{Error: err}, err
}
// Populate plan with broker buffer information
if stats != nil {
plan.BrokerBufferQueried = stats.BrokerBufferQueried
plan.BrokerBufferMessages = stats.BrokerBufferMessages
plan.BufferStartIndex = stats.BufferStartIndex
// Add broker_buffer to data sources if buffer was queried
if stats.BrokerBufferQueried {
// Check if broker_buffer is already in data sources
hasBrokerBuffer := false
for _, source := range plan.DataSources {
if source == "broker_buffer" {
hasBrokerBuffer = true
break
}
}
if !hasBrokerBuffer {
plan.DataSources = append(plan.DataSources, "broker_buffer")
}
}
}
} else {
// Normal mode - just get results
results, err = hybridScanner.Scan(ctx, hybridScanOptions)
if err != nil {
return &QueryResult{Error: err}, err
}
}
// Convert to SQL result format
if selectAll {
columns = nil // Let converter determine all columns
}
return hybridScanner.ConvertToSQLResult(results, columns), nil
}
// extractTimeFilters extracts time range filters from WHERE clause for optimization
// This allows push-down of time-based queries to improve scan performance
// Returns (startTimeNs, stopTimeNs) where 0 means unbounded
@ -1469,6 +1661,9 @@ func (builder *ExecutionPlanBuilder) buildDataSourcesList(strategy AggregationSt
sources = append(sources, "live_logs", "parquet_files")
}
// Note: broker_buffer is added dynamically during execution when broker is queried
// See aggregations.go lines 397-409 for the broker buffer data source addition logic
return sources
}
@ -1803,9 +1998,7 @@ func (e *SQLEngine) convertLogEntryToRecordValue(logEntry *filer_pb.LogEntry) (*
// Format: YYYY-MM-DD-HH-MM-SS.parquet
func (e *SQLEngine) extractTimestampFromFilename(filename string) int64 {
// Remove .parquet extension
if strings.HasSuffix(filename, ".parquet") {
filename = filename[:len(filename)-8]
}
filename = strings.TrimSuffix(filename, ".parquet")
// Parse timestamp format: 2006-01-02-15-04-05
t, err := time.Parse("2006-01-02-15-04-05", filename)

Write Preview
Loading…
Cancel
Save