61 lines
1.5 KiB
Go
61 lines
1.5 KiB
Go
package main
|
|
|
|
import (
|
|
"context"
|
|
"database/sql"
|
|
"fmt"
|
|
|
|
"github.com/jackc/pgx/v5/pgxpool"
|
|
|
|
_ "github.com/microsoft/go-mssqldb"
|
|
log "github.com/sirupsen/logrus"
|
|
)
|
|
|
|
func processMigrationJob(sourceDb *sql.DB, targetDb *pgxpool.Pool, job MigrationJob) {
|
|
sourceColTypes, targetColTypes, err := GetColumnTypes(sourceDb, targetDb, job)
|
|
if err != nil {
|
|
log.Fatal("Unexpected error: ", err)
|
|
}
|
|
|
|
logColumnTypes(sourceColTypes, "Source col types")
|
|
logColumnTypes(targetColTypes, "Target col types")
|
|
|
|
chRowsExtract := make(chan []UnknownRowValues, QueueSize)
|
|
|
|
mssqlContext := context.Background()
|
|
|
|
if err := extractFromMssql(mssqlContext, job, sourceColTypes, ChunkSize, sourceDb, chRowsExtract); err != nil {
|
|
log.Fatal("Unexpected error extrating data from mssql: ", err)
|
|
}
|
|
close(chRowsExtract)
|
|
|
|
transformRowsMssql(job, sourceColTypes, chRowsExtract)
|
|
}
|
|
|
|
func logColumnTypes(columnTypes []ColumnType, label string) {
|
|
log.Info(label)
|
|
|
|
for _, col := range columnTypes {
|
|
log.Infof("%+v", col)
|
|
}
|
|
}
|
|
|
|
func transformRowsMssql(job MigrationJob, columns []ColumnType, in <-chan []UnknownRowValues) {
|
|
for rows := range in {
|
|
log.Debug("Chunk received, transforming...")
|
|
|
|
for i, rowValues := range rows {
|
|
if i%100 == 0 {
|
|
logSampleRow(job, columns, rowValues, fmt.Sprintf("row %d", i))
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func logSampleRow(job MigrationJob, columns []ColumnType, rowValues UnknownRowValues, tag string) {
|
|
log.Infof("[%s.%s] Sample row: (%s)", job.Schema, job.Table, tag)
|
|
for i, col := range columns {
|
|
log.Infof("%s: %v", col.Name(), rowValues[i])
|
|
}
|
|
}
|