package sqlite3 import ( "context" "github.com/c9s/rockhopper" ) func init() { AddMigration(upTradeIndex, downTradeIndex) } func upTradeIndex(ctx context.Context, tx rockhopper.SQLExecutor) (err error) { // This code is executed when the migration is applied. _, 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 } func downTradeIndex(ctx context.Context, tx rockhopper.SQLExecutor) (err error) { // This code is executed when the migration is rolled back. _, err = tx.ExecContext(ctx, "DROP INDEX trades_symbol;") if err != nil { return err } _, err = tx.ExecContext(ctx, "DROP INDEX trades_symbol_fee_currency;") if err != nil { return err } _, err = tx.ExecContext(ctx, "DROP INDEX trades_traded_at_symbol;") if err != nil { return err } return err }