bbgo_origin/pkg/migrations/mysql/20201105092857_trades_index_fix.go

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package mysql
import (
"context"
"github.com/c9s/rockhopper"
)
func init() {
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AddMigration(upTradesIndexFix, downTradesIndexFix)
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}
func upTradesIndexFix(ctx context.Context, tx rockhopper.SQLExecutor) (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 rockhopper.SQLExecutor) (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
}