/
tools.go
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/
tools.go
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// Copyright 2021 - 2022 Matrix Origin
//
// 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,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package plan
import (
"go/constant"
"github.com/matrixorigin/matrixone/pkg/sql/parsers/tree"
)
const (
moRecursiveLevelCol = "__mo_recursive_level_col"
moDefaultRecursionMax = 100
moCheckRecursionLevelFun = "mo_check_level"
moEnumCastIndexToValueFun = "cast_index_to_value"
moEnumCastValueToIndexFun = "cast_value_to_index"
moEnumCastIndexValueToIndexFun = "cast_index_value_to_index"
)
func makeZeroRecursiveLevel() tree.SelectExpr {
return tree.SelectExpr{
Expr: tree.NewNumValWithType(constant.MakeInt64(0), "0", false, tree.P_int64),
As: tree.NewCStr(moRecursiveLevelCol, 1),
}
}
func makePlusRecursiveLevel(name string) tree.SelectExpr {
a := tree.SetUnresolvedName(name, moRecursiveLevelCol)
b := tree.NewNumValWithType(constant.MakeInt64(1), "1", false, tree.P_int64)
return tree.SelectExpr{
Expr: tree.NewBinaryExpr(tree.PLUS, a, b),
As: tree.NewCStr("", 1),
}
}