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Add more constraints for partition_retention_condition
Signed-off-by: shuming.li <[email protected]>
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65 changes: 65 additions & 0 deletions
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...re/src/main/java/com/starrocks/sql/optimizer/operator/scalar/OperatorFunctionChecker.java
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// Copyright 2021-present StarRocks, Inc. All rights reserved. | ||
// | ||
// 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 | ||
// | ||
// https://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 | ||
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package com.starrocks.sql.optimizer.operator.scalar; | ||
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import com.starrocks.common.Pair; | ||
import com.starrocks.sql.optimizer.rewrite.ScalarOperatorEvaluator; | ||
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import java.util.function.Predicate; | ||
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/** | ||
* FunctionChecker is used to check whether a ScalarOperator only contains a specific type of functions. | ||
*/ | ||
public class OperatorFunctionChecker { | ||
static class FunctionCheckerVisitor extends ScalarOperatorVisitor<Pair<Boolean, String>, Void> { | ||
private final Predicate<CallOperator> predicate; | ||
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public FunctionCheckerVisitor(Predicate<CallOperator> predicate) { | ||
this.predicate = predicate; | ||
} | ||
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@Override | ||
public Pair<Boolean, String> visit(ScalarOperator scalarOperator, Void context) { | ||
for (ScalarOperator child : scalarOperator.getChildren()) { | ||
Pair<Boolean, String> result = child.accept(this, null); | ||
if (!result.first) { | ||
return result; | ||
} | ||
} | ||
return Pair.create(true, ""); | ||
} | ||
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public Pair<Boolean, String> visitCall(CallOperator call, Void context) { | ||
if (predicate.test(call)) { | ||
return Pair.create(true, ""); | ||
} else { | ||
return Pair.create(false, call.getFnName()); | ||
} | ||
} | ||
} | ||
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public static Pair<Boolean, String> onlyContainPredicates(ScalarOperator scalarOperator, | ||
Predicate<CallOperator> predicate) { | ||
return scalarOperator.accept(new FunctionCheckerVisitor(predicate), null); | ||
} | ||
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public static Pair<Boolean, String> onlyContainMonotonicFunctions(ScalarOperator scalarOperator) { | ||
return onlyContainPredicates(scalarOperator, call -> ScalarOperatorEvaluator.INSTANCE.isMonotonicFunction(call)); | ||
} | ||
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public static Pair<Boolean, String> onlyContainFEConstantFunctions(ScalarOperator scalarOperator) { | ||
return onlyContainPredicates(scalarOperator, call -> ScalarOperatorEvaluator.INSTANCE.isFEConstantFunction(call)); | ||
} | ||
} |
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