mirror of
https://gitee.com/rulego/streamsql.git
synced 2025-07-06 07:58:32 +00:00
55 lines
1.4 KiB
Go
55 lines
1.4 KiB
Go
/*
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* Copyright 2024 The RuleGo Authors.
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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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*/
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package planner
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import (
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"github.com/expr-lang/expr"
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"github.com/rulego/streamsql/operator"
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"github.com/rulego/streamsql/rsql"
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"github.com/rulego/streamsql/types"
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)
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type FilterPlan struct {
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*BaseLogicalPlan
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}
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func (p *FilterPlan) New() types.LogicalPlan {
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return &FilterPlan{BaseLogicalPlan: &BaseLogicalPlan{}}
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}
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func (p *FilterPlan) Plan(statement rsql.Statement) error {
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if selectStatement, ok := statement.(*rsql.Select); ok {
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if expressionLang, ok := selectStatement.Where.(*rsql.ExpressionLang); ok {
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code := expressionLang.Val
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if program, err := expr.Compile(code); err != nil {
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return err
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} else {
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p.AddOperators(&operator.FilterOp{Program: program})
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}
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}
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}
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return nil
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}
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func (p *FilterPlan) Explain() string {
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return ""
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}
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func (p *FilterPlan) Type() string {
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return "FilterPlan"
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}
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