doris

Files

minghong d739aa7c53 [enhancement](Nereids) optimization for star-schema join reorder (#12817 )

the basic idea of star-schema support is:
1. fact_table JOIN dimension_table, if dimension table are filtered, the result can be regarded as applying a filter on fact table.
2. fact_table JOIN dimension_table, if the dimension table is not filtered, the number of join result tuple equals to the number of fact tuples.
3. dimension table JOIN fact table, the number of join result tuple is that of fact table or 2 times of dimension table.

If star-schema support is enabled:
1. nereids regard duplicate key(unique key/aggregation key) as primary key
2. nereids try to regard one join key as  primary key and another join key as foreign key.
3. if nereids found that no join key is primary key, nereids fall back to normal estimation.

2022-09-28 21:09:55 +08:00

check/checkstyle

[enhancement](chore)add single empty line rule to fe check style for Nereids (#12365 )

2022-09-06 14:19:59 +08:00

fe-common

[minor](*): remove redundant log and unused code. (#11620 )

2022-08-10 19:28:04 +08:00

fe-core

[enhancement](Nereids) optimization for star-schema join reorder (#12817 )

2022-09-28 21:09:55 +08:00

hive-udf

[style](fe)the last step of fe CheckStyle (#10134 )

2022-06-17 21:02:45 +08:00

java-udf

[Feature](vectorized) support jdbc sink for insert into data to table (#12534 )

2022-09-15 11:08:41 +08:00

spark-dpp

[performance improvement] Spark Load, SparkDpp processRDDAggregate performance improvement (#12186 )

2022-08-31 09:14:13 +08:00

pom.xml

[chore](build) add apache snapshot maven repo to repositories (#11549 )

2022-08-06 07:15:28 +08:00

README

[License] Add License header for missing files (#7130 )

2021-11-16 18:37:54 +08:00

README

# 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