b6a95a8cb3
* Dropped unused codekit config * Integrated dynamic and static bindata for public * Ignore public bindata * Add a general generate make task * Integrated flexible public assets into web command * Updated vendoring, added all missiong govendor deps * Made the linter happy with the bindata and dynamic code * Moved public bindata definition to modules directory * Ignoring the new bindata path now * Updated to the new public modules import path * Updated public bindata command and drop the new prefix
90 lines
3.2 KiB
Go
90 lines
3.2 KiB
Go
// Copyright 2015 PingCAP, Inc.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package optimizer
|
|
|
|
import (
|
|
"github.com/juju/errors"
|
|
"github.com/pingcap/tidb/ast"
|
|
"github.com/pingcap/tidb/context"
|
|
"github.com/pingcap/tidb/infoschema"
|
|
"github.com/pingcap/tidb/mysql"
|
|
"github.com/pingcap/tidb/optimizer/plan"
|
|
"github.com/pingcap/tidb/terror"
|
|
)
|
|
|
|
// Optimize does optimization and creates a Plan.
|
|
// The node must be prepared first.
|
|
func Optimize(ctx context.Context, node ast.Node, sb plan.SubQueryBuilder) (plan.Plan, error) {
|
|
// We have to infer type again because after parameter is set, the expression type may change.
|
|
if err := InferType(node); err != nil {
|
|
return nil, errors.Trace(err)
|
|
}
|
|
if err := logicOptimize(ctx, node); err != nil {
|
|
return nil, errors.Trace(err)
|
|
}
|
|
p, err := plan.BuildPlan(node, sb)
|
|
if err != nil {
|
|
return nil, errors.Trace(err)
|
|
}
|
|
err = plan.Refine(p)
|
|
if err != nil {
|
|
return nil, errors.Trace(err)
|
|
}
|
|
return p, nil
|
|
}
|
|
|
|
// Prepare prepares a raw statement parsed from parser.
|
|
// The statement must be prepared before it can be passed to optimize function.
|
|
// We pass InfoSchema instead of getting from Context in case it is changed after resolving name.
|
|
func Prepare(is infoschema.InfoSchema, ctx context.Context, node ast.Node) error {
|
|
ast.SetFlag(node)
|
|
if err := Preprocess(node, is, ctx); err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
if err := Validate(node, true); err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Optimizer error codes.
|
|
const (
|
|
CodeOneColumn terror.ErrCode = 1
|
|
CodeSameColumns terror.ErrCode = 2
|
|
CodeMultiWildCard terror.ErrCode = 3
|
|
CodeUnsupported terror.ErrCode = 4
|
|
CodeInvalidGroupFuncUse terror.ErrCode = 5
|
|
CodeIllegalReference terror.ErrCode = 6
|
|
)
|
|
|
|
// Optimizer base errors.
|
|
var (
|
|
ErrOneColumn = terror.ClassOptimizer.New(CodeOneColumn, "Operand should contain 1 column(s)")
|
|
ErrSameColumns = terror.ClassOptimizer.New(CodeSameColumns, "Operands should contain same columns")
|
|
ErrMultiWildCard = terror.ClassOptimizer.New(CodeMultiWildCard, "wildcard field exist more than once")
|
|
ErrUnSupported = terror.ClassOptimizer.New(CodeUnsupported, "unsupported")
|
|
ErrInvalidGroupFuncUse = terror.ClassOptimizer.New(CodeInvalidGroupFuncUse, "Invalid use of group function")
|
|
ErrIllegalReference = terror.ClassOptimizer.New(CodeIllegalReference, "Illegal reference")
|
|
)
|
|
|
|
func init() {
|
|
mySQLErrCodes := map[terror.ErrCode]uint16{
|
|
CodeOneColumn: mysql.ErrOperandColumns,
|
|
CodeSameColumns: mysql.ErrOperandColumns,
|
|
CodeMultiWildCard: mysql.ErrParse,
|
|
CodeInvalidGroupFuncUse: mysql.ErrInvalidGroupFuncUse,
|
|
CodeIllegalReference: mysql.ErrIllegalReference,
|
|
}
|
|
terror.ErrClassToMySQLCodes[terror.ClassOptimizer] = mySQLErrCodes
|
|
}
|