bbgo_origin/pkg/migrations/20201211175751_fix_symbol_length.go

package migrations

import (
	"context"

	"github.com/c9s/rockhopper"
)

func init() {
	rockhopper.AddMigration(upFixSymbolLength, downFixSymbolLength)
}

func upFixSymbolLength(ctx context.Context, tx rockhopper.SQLExecutor) (err error) {
	// This code is executed when the migration is applied.

	_, err = tx.ExecContext(ctx, "ALTER TABLE trades MODIFY COLUMN symbol VARCHAR(9);")
	if err != nil {
		return err
	}

	_, err = tx.ExecContext(ctx, "ALTER TABLE orders MODIFY COLUMN symbol VARCHAR(9);")
	if err != nil {
		return err
	}

	return err
}

func downFixSymbolLength(ctx context.Context, tx rockhopper.SQLExecutor) (err error) {
	// This code is executed when the migration is rolled back.

	_, err = tx.ExecContext(ctx, "ALTER TABLE trades MODIFY COLUMN symbol VARCHAR(8);")
	if err != nil {
		return err
	}

	_, err = tx.ExecContext(ctx, "ALTER TABLE orders MODIFY COLUMN symbol VARCHAR(8);")
	if err != nil {
		return err
	}

	return err
}