示例#1
0
文件: tidb.go 项目: awesomeleo/tidb
func runStmt(ctx context.Context, s stmt.Statement, args ...interface{}) (rset.Recordset, error) {
	var err error
	var rs rset.Recordset
	// before every execution, we must clear affectedrows.
	variable.GetSessionVars(ctx).SetAffectedRows(0)
	switch s.(type) {
	case *stmts.PreparedStmt:
		ps := s.(*stmts.PreparedStmt)
		return runPreparedStmt(ctx, ps)
	case *stmts.ExecuteStmt:
		es := s.(*stmts.ExecuteStmt)
		rs, err = runExecute(ctx, es, args...)
		if err != nil {
			return nil, errors.Trace(err)
		}
	default:
		if s.IsDDL() {
			err = ctx.FinishTxn(false)
			if err != nil {
				return nil, errors.Trace(err)
			}
		}
		stmt.BindExecArgs(ctx, args)
		rs, err = s.Exec(ctx)
		stmt.ClearExecArgs(ctx)
	}
	// MySQL DDL should be auto-commit
	if err == nil && (s.IsDDL() || variable.ShouldAutocommit(ctx)) {
		err = ctx.FinishTxn(false)
	}
	return rs, errors.Trace(err)
}
示例#2
0
文件: tidb.go 项目: henrylee2cn/tidb
func runStmt(ctx context.Context, s stmt.Statement, args ...interface{}) (rset.Recordset, error) {
	var err error
	var rs rset.Recordset
	// before every execution, we must clear affectedrows.
	variable.GetSessionVars(ctx).SetAffectedRows(0)
	switch ts := s.(type) {
	case *stmts.PreparedStmt:
		rs, err = runPreparedStmt(ctx, ts)
	case *stmts.ExecuteStmt:
		rs, err = runExecute(ctx, ts, args...)
	default:
		if s.IsDDL() {
			err = ctx.FinishTxn(false)
			if err != nil {
				return nil, errors.Trace(err)
			}
		}
		stmt.BindExecArgs(ctx, args)
		rs, err = s.Exec(ctx)
		stmt.ClearExecArgs(ctx)
	}
	// All the history should be added here.
	se := ctx.(*session)
	switch ts := s.(type) {
	case *stmts.PreparedStmt:
		se.history.add(ts.ID, s)
	case *stmts.ExecuteStmt:
		se.history.add(ts.ID, s, args...)
	default:
		se.history.add(0, s)
	}
	// MySQL DDL should be auto-commit
	if s.IsDDL() || autocommit.ShouldAutocommit(ctx) {
		if err != nil {
			ctx.FinishTxn(true)
		} else {
			err = ctx.FinishTxn(false)
		}
	}
	return rs, errors.Trace(err)
}