67 lines
1.7 KiB
Go
67 lines
1.7 KiB
Go
package main
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import (
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"context"
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"database/sql"
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"sync"
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"github.com/jackc/pgx/v5/pgxpool"
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_ "github.com/microsoft/go-mssqldb"
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log "github.com/sirupsen/logrus"
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)
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func processMigrationJob(sourceDb *sql.DB, targetDb *pgxpool.Pool, job MigrationJob) {
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sourceColTypes, targetColTypes, err := GetColumnTypes(sourceDb, targetDb, job)
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if err != nil {
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log.Fatal("Unexpected error: ", err)
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}
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logColumnTypes(sourceColTypes, "Source col types")
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logColumnTypes(targetColTypes, "Target col types")
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chRowsExtract := make(chan []UnknownRowValues, QueueSize)
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chRowsTransform := make(chan []UnknownRowValues)
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mssqlCtx := context.Background()
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go func() {
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if err := extractFromMssql(mssqlCtx, job, sourceColTypes, ChunkSize, sourceDb, chRowsExtract); err != nil {
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log.Error("Unexpected error extrating data from mssql: ", err)
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}
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close(chRowsExtract)
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}()
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go func() {
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transformRowsMssql(sourceColTypes, chRowsExtract, chRowsTransform)
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close(chRowsTransform)
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}()
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var wgPostgresLoaders sync.WaitGroup
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postgresLoaderCtx := context.Background()
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for range NumLoaders {
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wgPostgresLoaders.Go(func() {
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if err := loadRowsPostgres(postgresLoaderCtx, job, sourceColTypes, targetDb, chRowsTransform); err != nil {
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log.Error("Unexpected error loading data into postgres: ", err)
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}
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})
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}
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wgPostgresLoaders.Wait()
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}
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func logColumnTypes(columnTypes []ColumnType, label string) {
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log.Info(label)
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for _, col := range columnTypes {
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log.Infof("%+v", col)
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}
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}
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func logSampleRow(job MigrationJob, columns []ColumnType, rowValues UnknownRowValues, tag string) {
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log.Infof("[%s.%s] Sample row: (%s)", job.Schema, job.Table, tag)
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for i, col := range columns {
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log.Infof("%s (%T): %v", col.Name(), rowValues[i], rowValues[i])
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}
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}
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