You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@spark.apache.org by "Cheng Lian (JIRA)" <ji...@apache.org> on 2015/07/22 12:43:04 UTC
[jira] [Commented] (SPARK-9182) filter and groupBy on DataFrames
are not passed through to jdbc source
[ https://issues.apache.org/jira/browse/SPARK-9182?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14636686#comment-14636686 ]
Cheng Lian commented on SPARK-9182:
-----------------------------------
I'm looking into this.
> filter and groupBy on DataFrames are not passed through to jdbc source
> ----------------------------------------------------------------------
>
> Key: SPARK-9182
> URL: https://issues.apache.org/jira/browse/SPARK-9182
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.4.1
> Reporter: Greg Rahn
>
> When running all of these API calls, the only one that passes the filter through to the backend jdbc source is equality. All filters in these commands should be able to be passed through to the jdbc database source.
> {code}
> val url="jdbc:postgresql:grahn"
> val prop = new java.util.Properties
> val emp = sqlContext.read.jdbc(url, "emp", prop)
> emp.filter(emp("sal") === 5000).show()
> emp.filter(emp("sal") < 5000).show()
> emp.filter("sal = 3000").show()
> emp.filter("sal > 2500").show()
> emp.filter("sal >= 2500").show()
> emp.filter("sal < 2500").show()
> emp.filter("sal <= 2500").show()
> emp.filter("sal != 3000").show()
> emp.filter("sal between 3000 and 5000").show()
> emp.filter("ename in ('SCOTT','BLAKE')").show()
> {code}
> We see from the PostgreSQL query log the following is run, and see that only equality predicates are passed through.
> {code}
> LOG: execute <unnamed>: SET extra_float_digits = 3
> LOG: execute <unnamed>: SELECT "empno","ename","job","mgr","hiredate","sal","comm","deptno" FROM emp WHERE sal = 5000
> LOG: execute <unnamed>: SET extra_float_digits = 3
> LOG: execute <unnamed>: SELECT "empno","ename","job","mgr","hiredate","sal","comm","deptno" FROM emp
> LOG: execute <unnamed>: SET extra_float_digits = 3
> LOG: execute <unnamed>: SELECT "empno","ename","job","mgr","hiredate","sal","comm","deptno" FROM emp WHERE sal = 3000
> LOG: execute <unnamed>: SET extra_float_digits = 3
> LOG: execute <unnamed>: SELECT "empno","ename","job","mgr","hiredate","sal","comm","deptno" FROM emp
> LOG: execute <unnamed>: SET extra_float_digits = 3
> LOG: execute <unnamed>: SELECT "empno","ename","job","mgr","hiredate","sal","comm","deptno" FROM emp
> LOG: execute <unnamed>: SET extra_float_digits = 3
> LOG: execute <unnamed>: SELECT "empno","ename","job","mgr","hiredate","sal","comm","deptno" FROM emp
> LOG: execute <unnamed>: SET extra_float_digits = 3
> LOG: execute <unnamed>: SELECT "empno","ename","job","mgr","hiredate","sal","comm","deptno" FROM emp
> LOG: execute <unnamed>: SET extra_float_digits = 3
> LOG: execute <unnamed>: SELECT "empno","ename","job","mgr","hiredate","sal","comm","deptno" FROM emp
> LOG: execute <unnamed>: SET extra_float_digits = 3
> LOG: execute <unnamed>: SELECT "empno","ename","job","mgr","hiredate","sal","comm","deptno" FROM emp
> LOG: execute <unnamed>: SET extra_float_digits = 3
> LOG: execute <unnamed>: SELECT "empno","ename","job","mgr","hiredate","sal","comm","deptno" FROM emp
> {code}
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org
For additional commands, e-mail: issues-help@spark.apache.org