[CockroachDB] SST 파일에서 key & value 추출하기

To extract data from a CockroachDB SST file using Golang, you can use the engineccl package provided by CockroachDB. Here's an example code snippet that demonstrates how to read the data from a single SST file:

 

package main

import (
    "fmt"
    "github.com/cockroachdb/cockroach/pkg/storage/engine"
    "github.com/cockroachdb/cockroach/pkg/storage/engine/engineccl"
    "io"
    "os"
)

func main() {
    // Open the SST file for reading.
    file, err := os.Open("/path/to/sst/file")
    if err != nil {
        panic(err)
    }
    defer file.Close()

    // Create a new engine.Reader object for reading the SST file.
    reader, err := engineccl.NewSSTReader(file)
    if err != nil {
        panic(err)
    }
    defer reader.Close()

    // Iterate over the key-value pairs in the SST file and print them to stdout.
    iter := reader.NewIterator(false)
    defer iter.Close()
    for iter.Seek(engine.NilKey); ; iter.Next() {
        if ok, err := iter.Valid(); !ok {
            if err == nil {
                break
            }
            panic(err)
        }
        key := iter.Key()
        value := iter.Value()
        fmt.Printf("key=%s value=%s\n", key.String(), value.String())
    }
}