package migrations import ( "database/sql" "context" "github.com/c9s/rockhopper" ) func init() { rockhopper.AddMigration(upTradesIndexFix, downTradesIndexFix) } func upTradesIndexFix(ctx context.Context, tx *sql.Tx) (err error) { // This code is executed when the migration is applied. _, err = tx.ExecContext(ctx, "DROP INDEX trades_symbol ON trades;") if err != nil { return err } _, err = tx.ExecContext(ctx, "DROP INDEX trades_symbol_fee_currency ON trades;") if err != nil { return err } _, err = tx.ExecContext(ctx, "DROP INDEX trades_traded_at_symbol ON trades;") if err != nil { return err } _, err = tx.ExecContext(ctx, "CREATE INDEX trades_symbol ON trades (exchange, symbol);") if err != nil { return err } _, err = tx.ExecContext(ctx, "CREATE INDEX trades_symbol_fee_currency ON trades (exchange, symbol, fee_currency, traded_at);") if err != nil { return err } _, err = tx.ExecContext(ctx, "CREATE INDEX trades_traded_at_symbol ON trades (exchange, traded_at, symbol);") if err != nil { return err } return err } func downTradesIndexFix(ctx context.Context, tx *sql.Tx) (err error) { // This code is executed when the migration is rolled back. _, err = tx.ExecContext(ctx, "DROP INDEX trades_symbol ON trades;") if err != nil { return err } _, err = tx.ExecContext(ctx, "DROP INDEX trades_symbol_fee_currency ON trades;") if err != nil { return err } _, err = tx.ExecContext(ctx, "DROP INDEX trades_traded_at_symbol ON trades;") if err != nil { return err } _, err = tx.ExecContext(ctx, "CREATE INDEX trades_symbol ON trades (symbol);") if err != nil { return err } _, err = tx.ExecContext(ctx, "CREATE INDEX trades_symbol_fee_currency ON trades (symbol, fee_currency, traded_at);") if err != nil { return err } _, err = tx.ExecContext(ctx, "CREATE INDEX trades_traded_at_symbol ON trades (traded_at, symbol);") if err != nil { return err } return err }