46 lines
1.8 KiB
Go
46 lines
1.8 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 joinversion
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import (
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"strings"
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)
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const (
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// HashJoinVersionLegacy means hash join v1
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HashJoinVersionLegacy = "legacy"
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// HashJoinVersionOptimized means hash join v2
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HashJoinVersionOptimized = "optimized"
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)
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var (
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// UseHashJoinV2ForNonGAJoin is added because Hash join contains a lots of types(like inner join, outer join, semi join, nullaware semi join, etc)
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// we want to GA these different kind of joins step by step, but don't want to add a new session variable for each of the join,
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// so we add this variable to control whether to use hash join v2 for nonGA joins(enable it for test, disable it in a release version).
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// PhysicalHashJoin.isGAForHashJoinV2() defines whether the join is GA for hash join v2, we can make each join GA separately by updating
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// this function one by one
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UseHashJoinV2ForNonGAJoin = false
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)
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func init() {
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// This variable is set to true for test, need to be set back to false in release version
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UseHashJoinV2ForNonGAJoin = true
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}
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// IsOptimizedVersion returns true if hashJoinVersion equals to HashJoinVersionOptimized
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func IsOptimizedVersion(hashJoinVersion string) bool {
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return strings.ToLower(hashJoinVersion) == HashJoinVersionOptimized
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}
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