36 lines
1.7 KiB
Go
36 lines
1.7 KiB
Go
// Copyright 2024 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package util
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import (
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"github.com/pingcap/tidb/pkg/expression"
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"github.com/pingcap/tidb/pkg/parser/ast"
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"github.com/pingcap/tidb/pkg/planner/planctx"
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"github.com/pingcap/tidb/pkg/types"
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)
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// EvalAstExprWithPlanCtx evaluates ast expression with plan context.
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// Different with expression.EvalSimpleAst, it uses planner context and is more powerful to build
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// some special expressions like subquery, window function, etc.
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// If you only want to evaluate simple expressions, use `expression.EvalSimpleAst` instead.
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var EvalAstExprWithPlanCtx func(ctx planctx.PlanContext, expr ast.ExprNode) (types.Datum, error)
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// RewriteAstExprWithPlanCtx rewrites ast expression directly.
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// Different with expression.BuildSimpleExpr, it uses planner context and is more powerful to build
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// some special expressions like subquery, window function, etc.
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// If you only want to build simple expressions, use `expression.BuildSimpleExpr` instead.
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var RewriteAstExprWithPlanCtx func(ctx planctx.PlanContext, expr ast.ExprNode,
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schema *expression.Schema, names types.NameSlice, allowCastArray bool) (expression.Expression, error)
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