wehub-resource-sync
64 lines
2.7 KiB
Go
Executable File
64 lines
2.7 KiB
Go
Executable File
// Copyright 2024 Dolthub, 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 analyzer
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import (
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"github.com/dolthub/go-mysql-server/sql"
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"github.com/dolthub/go-mysql-server/sql/analyzer"
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gms_expression "github.com/dolthub/go-mysql-server/sql/expression"
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"github.com/dolthub/go-mysql-server/sql/plan"
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"github.com/dolthub/go-mysql-server/sql/transform"
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"github.com/dolthub/doltgresql/server/expression"
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"github.com/dolthub/doltgresql/server/functions/framework"
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)
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// ReplaceArithmeticExpressions replaces arithmetic expressions in the tree with the equivalent binary operators.
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// This is a problem in certain nodes that do arithmetic, such as TopN, but all nodes are covered.
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func ReplaceArithmeticExpressions(ctx *sql.Context, a *analyzer.Analyzer, node sql.Node, scope *plan.Scope, selector analyzer.RuleSelector, qFlags *sql.QueryFlags) (sql.Node, transform.TreeIdentity, error) {
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return transform.NodeExprsWithOpaque(ctx, node, func(ctx *sql.Context, e sql.Expression) (sql.Expression, transform.TreeIdentity, error) {
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switch e := e.(type) {
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case *gms_expression.Arithmetic:
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switch e.Operator() {
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case "+":
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expr, err := expression.NewBinaryOperator(framework.Operator_BinaryPlus).WithChildren(ctx, e.Children()...)
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if err != nil {
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return nil, transform.NewTree, err
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}
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return expr.(*expression.BinaryOperator), transform.NewTree, nil
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case "-":
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expr, err := expression.NewBinaryOperator(framework.Operator_BinaryMinus).WithChildren(ctx, e.Children()...)
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if err != nil {
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return nil, transform.NewTree, err
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}
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return expr.(*expression.BinaryOperator), transform.NewTree, nil
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case "*":
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expr, err := expression.NewBinaryOperator(framework.Operator_BinaryMultiply).WithChildren(ctx, e.Children()...)
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if err != nil {
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return nil, transform.NewTree, err
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}
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return expr.(*expression.BinaryOperator), transform.NewTree, nil
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case "/":
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expr, err := expression.NewBinaryOperator(framework.Operator_BinaryDivide).WithChildren(ctx, e.Children()...)
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if err != nil {
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return nil, transform.NewTree, err
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}
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return expr.(*expression.BinaryOperator), transform.NewTree, nil
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}
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}
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return e, transform.SameTree, nil
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})
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}
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