bourdon
ae87c38776
- Core engine with MemTable, SST, WAL - B+Tree indexing for SST files - Leveled compaction strategy - Multi-table database management - Schema validation and secondary indexes - Query builder with complex conditions - Web UI with HTMX for data visualization - Command-line tools for diagnostics
76 lines
1.8 KiB
Go
76 lines
1.8 KiB
Go
package commands
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import (
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"fmt"
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"log"
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"os"
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"code.tczkiot.com/srdb/sst"
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)
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// InspectSST 检查特定 SST 文件
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func InspectSST(sstPath string) {
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// Check if file exists
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info, err := os.Stat(sstPath)
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if err != nil {
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log.Fatal(err)
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}
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fmt.Printf("File: %s\n", sstPath)
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fmt.Printf("Size: %d bytes\n", info.Size())
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// Open reader
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reader, err := sst.NewReader(sstPath)
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if err != nil {
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log.Fatal(err)
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}
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defer reader.Close()
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// Get header
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header := reader.GetHeader()
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fmt.Printf("\nHeader:\n")
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fmt.Printf(" RowCount: %d\n", header.RowCount)
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fmt.Printf(" MinKey: %d\n", header.MinKey)
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fmt.Printf(" MaxKey: %d\n", header.MaxKey)
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fmt.Printf(" DataSize: %d bytes\n", header.DataSize)
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// Get all keys using GetAllKeys()
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allKeys := reader.GetAllKeys()
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fmt.Printf("\nActual keys in file: %d keys\n", len(allKeys))
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if len(allKeys) > 0 {
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fmt.Printf(" First key: %d\n", allKeys[0])
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fmt.Printf(" Last key: %d\n", allKeys[len(allKeys)-1])
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if len(allKeys) <= 30 {
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fmt.Printf(" All keys: %v\n", allKeys)
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} else {
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fmt.Printf(" First 15: %v\n", allKeys[:15])
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fmt.Printf(" Last 15: %v\n", allKeys[len(allKeys)-15:])
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}
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}
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// Try to get a specific key
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fmt.Printf("\nTrying to get key 332:\n")
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row, err := reader.Get(332)
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if err != nil {
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fmt.Printf(" Error: %v\n", err)
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} else if row == nil {
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fmt.Printf(" NULL\n")
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} else {
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fmt.Printf(" FOUND: seq=%d, time=%d\n", row.Seq, row.Time)
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}
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// Try to get key based on actual first key
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if len(allKeys) > 0 {
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firstKey := allKeys[0]
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fmt.Printf("\nTrying to get actual first key %d:\n", firstKey)
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row, err := reader.Get(firstKey)
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if err != nil {
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fmt.Printf(" Error: %v\n", err)
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} else if row == nil {
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fmt.Printf(" NULL\n")
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} else {
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fmt.Printf(" FOUND: seq=%d, time=%d\n", row.Seq, row.Time)
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}
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}
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}
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