github.com/matrixorigin/matrixone@v1.2.0/pkg/sql/plan/binding.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  	"github.com/matrixorigin/matrixone/pkg/pb/plan"
    19  )
    20  
    21  func (b *Binding) FindColumn(col string) int32 {
    22  	if id, ok := b.colIdByName[col]; ok {
    23  		return id
    24  	}
    25  
    26  	return NotFound
    27  }
    28  
    29  func NewBinding(tag, nodeID int32, db, table string, tableID uint64, cols []string, colIsHidden []bool, types []*plan.Type, isClusterTable bool, defaultVals []string) *Binding {
    30  	binding := &Binding{
    31  		tag:            tag,
    32  		nodeId:         nodeID,
    33  		db:             db,
    34  		table:          table,
    35  		tableID:        tableID,
    36  		cols:           cols,
    37  		colIsHidden:    colIsHidden,
    38  		types:          types,
    39  		refCnts:        make([]uint, len(cols)),
    40  		isClusterTable: isClusterTable,
    41  		defaults:       defaultVals,
    42  	}
    43  
    44  	binding.colIdByName = make(map[string]int32)
    45  	for i, col := range cols {
    46  		if _, ok := binding.colIdByName[col]; ok {
    47  			binding.colIdByName[col] = AmbiguousName
    48  		} else {
    49  			binding.colIdByName[col] = int32(i)
    50  		}
    51  	}
    52  
    53  	return binding
    54  }