GitHub user maropu opened a pull request:
https://github.com/apache/spark/pull/10427
Implement JdbcRelation#unhandledFilters for removing unnecessary Spark
Filter
Input: SELECT * FROM jdbcTable WHERE col0 = 'xxx'
Current plan:
```
== Optimized Logical Plan ==
Project [col0#0,col1#1]
+- Filter (col0#0 = xxx)
+- Relation[col0#0,col1#1]
JDBCRelation(jdbc:postgresql:postgres,testRel,[Lorg.apache.spark.Partition;@2ac7c683,{user=maropu,
password=, driver=org.postgresql.Driver})
== Physical Plan ==
+- Filter (col0#0 = xxx)
+- Scan
JDBCRelation(jdbc:postgresql:postgres,testRel,[Lorg.apache.spark.Partition;@2ac7c683,{user=maropu,
password=, driver=org.postgresql.Driver})[col0#0,col1#1] PushedFilters:
[EqualTo(col0,xxx)]
```
This patch enables a plan below;
```
== Optimized Logical Plan ==
Project [col0#0,col1#1]
+- Filter (col0#0 = xxx)
+- Relation[col0#0,col1#1]
JDBCRelation(jdbc:postgresql:postgres,testRel,[Lorg.apache.spark.Partition;@2ac7c683,{user=maropu,
password=, driver=org.postgresql.Driver})
== Physical Plan ==
Scan
JDBCRelation(jdbc:postgresql:postgres,testRel,[Lorg.apache.spark.Partition;@2ac7c683,{user=maropu,
password=, driver=org.postgresql.Driver})[col0#0,col1#1] PushedFilters:
[EqualTo(col0,xxx)]
```
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/maropu/spark RemoveFilterInJdbcScan
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/10427.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #10427
----
commit c129f289b02f04b0942a50843dcee733d9e365d8
Author: Takeshi YAMAMURO <[email protected]>
Date: 2015-12-22T00:31:30Z
Implement JdbcRelation#unhandledFilters
----
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