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 }