ccfc4978c1
Support the rewrite rule for push-down filter through sort. We can directly push-down the filter through sort without any conditions check. Before this PR: ``` mysql> explain select * from (select * from t1 order by a) t2 where t2.b > 2; +-------------------------------------------------------------+ | Explain String | +-------------------------------------------------------------+ | PLAN FRAGMENT 0 | | OUTPUT EXPRS: | | a[#2] | | b[#3] | | PARTITION: UNPARTITIONED | | | | VRESULT SINK | | | | 3:VSELECT | | | predicates: b[#3] > 2 | | | | | 2:VMERGING-EXCHANGE | | offset: 0 | | | | PLAN FRAGMENT 1 | | | | PARTITION: HASH_PARTITIONED: a[#0] | | | | STREAM DATA SINK | | EXCHANGE ID: 02 | | UNPARTITIONED | | | | 1:VTOP-N | | | order by: a[#2] ASC | | | offset: 0 | | | | | 0:VOlapScanNode | | TABLE: default_cluster:test.t1(t1), PREAGGREGATION: ON | | partitions=0/1, tablets=0/0, tabletList= | | cardinality=1, avgRowSize=0.0, numNodes=1 | +-------------------------------------------------------------+ 30 rows in set (0.06 sec) ``` After this PR: ``` mysql> explain select * from (select * from t1 order by a) t2 where t2.b > 2; +-------------------------------------------------------------+ | Explain String | +-------------------------------------------------------------+ | PLAN FRAGMENT 0 | | OUTPUT EXPRS: | | a[#2] | | b[#3] | | PARTITION: UNPARTITIONED | | | | VRESULT SINK | | | | 2:VMERGING-EXCHANGE | | offset: 0 | | | | PLAN FRAGMENT 1 | | | | PARTITION: HASH_PARTITIONED: a[#0] | | | | STREAM DATA SINK | | EXCHANGE ID: 02 | | UNPARTITIONED | | | | 1:VTOP-N | | | order by: a[#2] ASC | | | offset: 0 | | | | | 0:VOlapScanNode | | TABLE: default_cluster:test.t1(t1), PREAGGREGATION: ON | | PREDICATES: b[#1] > 2 | | partitions=0/1, tablets=0/0, tabletList= | | cardinality=1, avgRowSize=0.0, numNodes=1 | +-------------------------------------------------------------+ 28 rows in set (0.40 sec) ```
# Licensed to the Apache Software Foundation (ASF) under one # or more contributor license agreements. See the NOTICE file # distributed with this work for additional information # regarding copyright ownership. The ASF licenses this file # to you 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 # # http://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. # fe-common This module is used to store some common classes of other modules. # spark-dpp This module is Spark DPP program, used for Spark Load function. Depends: fe-common # fe-core This module is the main process module of FE. Depends: fe-common, spark-dpp