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fe/fe-core/src/main/java/com/starrocks/sql/optimizer/operator/OpRuleBit.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; | ||
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public class OpRuleBit { | ||
// Like LogicalJoinOperator#transformMask, add a mask to avoid one operator's dead-loop in one transform rule. | ||
// eg: MV's UNION-ALL RULE: | ||
// UNION UNION | ||
// / \ / \ | ||
// OP --> EXTRA-OP MV-SCAN --> UNION MV-SCAN ---> .... | ||
// / \ | ||
// EXTRA-OP MV-SCAN | ||
// Operator has been union rewrite or not, if union all, no need to union again. | ||
public static final int OP_MV_UNION_REWRITE = 0; | ||
// Operator has been push down predicates or not, if push down predicates, no need to push down again. | ||
public static final int OP_MV_AGG_PUSH_DOWN_REWRITE = 1; | ||
// Operator has been transparent mv rewrite or not, if transparent mv rewrite, no need to rewrite again. | ||
public static final int OP_MV_TRANSPARENT_REWRITE = 2; | ||
// Operator has been partition pruned or not, if partition pruned, no need to prune again. | ||
public static final int OP_PARTITION_PRUNED = 3; | ||
} |
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