github.com/matrixorigin/matrixone@v1.2.0/pkg/sql/plan/default_binder.go (about)

     1  // Copyright 2022 Matrix Origin
     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  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package plan
    16  
    17  import (
    18  	"context"
    19  
    20  	"github.com/matrixorigin/matrixone/pkg/common/moerr"
    21  	"github.com/matrixorigin/matrixone/pkg/pb/plan"
    22  	"github.com/matrixorigin/matrixone/pkg/sql/parsers/tree"
    23  	"strings"
    24  )
    25  
    26  func NewDefaultBinder(sysCtx context.Context, builder *QueryBuilder, ctx *BindContext, typ Type, cols []string) *DefaultBinder {
    27  	b := &DefaultBinder{typ: typ, cols: cols}
    28  	b.sysCtx = sysCtx
    29  	b.builder = builder
    30  	b.ctx = ctx
    31  	b.impl = b
    32  
    33  	return b
    34  }
    35  
    36  func (b *DefaultBinder) BindExpr(astExpr tree.Expr, depth int32, isRoot bool) (*plan.Expr, error) {
    37  	return b.baseBindExpr(astExpr, depth, isRoot)
    38  }
    39  
    40  func (b *DefaultBinder) BindColRef(astExpr *tree.UnresolvedName, depth int32, isRoot bool) (*plan.Expr, error) {
    41  	if b.cols != nil {
    42  		return b.bindColRef(astExpr, depth, isRoot)
    43  	}
    44  	return b.baseBindColRef(astExpr, depth, isRoot)
    45  }
    46  
    47  func (b *DefaultBinder) bindColRef(astExpr *tree.UnresolvedName, _ int32, _ bool) (expr *plan.Expr, err error) {
    48  	col := strings.ToLower(astExpr.Parts[0])
    49  	idx := -1
    50  	for i, c := range b.cols {
    51  		if c == col {
    52  			idx = i
    53  			break
    54  		}
    55  	}
    56  	if idx == -1 {
    57  		err = moerr.NewInvalidInput(b.GetContext(), "column '%s' does not exist", col)
    58  		return
    59  	}
    60  	expr = &plan.Expr{
    61  		Typ: b.typ,
    62  	}
    63  	expr.Expr = &plan.Expr_Col{
    64  		Col: &plan.ColRef{
    65  			RelPos: 0,
    66  			ColPos: int32(idx),
    67  		},
    68  	}
    69  	return
    70  }
    71  
    72  func (b *DefaultBinder) BindAggFunc(funcName string, astExpr *tree.FuncExpr, depth int32, isRoot bool) (*plan.Expr, error) {
    73  	return nil, moerr.NewInvalidInput(b.GetContext(), "cannot bind agregate functions '%s'", funcName)
    74  }
    75  
    76  func (b *DefaultBinder) BindWinFunc(funcName string, astExpr *tree.FuncExpr, depth int32, isRoot bool) (*plan.Expr, error) {
    77  	return nil, moerr.NewInvalidInput(b.GetContext(), "cannot bind window functions '%s'", funcName)
    78  }
    79  
    80  func (b *DefaultBinder) BindSubquery(astExpr *tree.Subquery, isRoot bool) (*plan.Expr, error) {
    81  	return nil, moerr.NewNYI(b.GetContext(), "subquery in JOIN condition")
    82  }
    83  
    84  func (b *DefaultBinder) BindTimeWindowFunc(funcName string, astExpr *tree.FuncExpr, depth int32, isRoot bool) (*plan.Expr, error) {
    85  	return nil, moerr.NewInvalidInput(b.GetContext(), "cannot bind time window functions '%s'", funcName)
    86  }