github.com/insionng/yougam@v0.0.0-20170714101924-2bc18d833463/libraries/pingcap/tidb/optimizer/preprocess.go (about)

     1  // Copyright 2015 PingCAP, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package optimizer
    15  
    16  import (
    17  	"github.com/insionng/yougam/libraries/juju/errors"
    18  	"github.com/insionng/yougam/libraries/pingcap/tidb/ast"
    19  	"github.com/insionng/yougam/libraries/pingcap/tidb/context"
    20  	"github.com/insionng/yougam/libraries/pingcap/tidb/infoschema"
    21  )
    22  
    23  // Preprocess does preprocess work for optimizer.
    24  func Preprocess(node ast.Node, info infoschema.InfoSchema, ctx context.Context) error {
    25  	if err := ResolveName(node, info, ctx); err != nil {
    26  		return errors.Trace(err)
    27  	}
    28  	return nil
    29  }