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https://issues.apache.org/jira/browse/DRILL-6834?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16698134#comment-16698134
]
ASF GitHub Bot commented on DRILL-6834:
---------------------------------------
vvysotskyi commented on a change in pull request #1549: DRILL-6834: Introduce
option to disable result set on CTAS, create vi…
URL: https://github.com/apache/drill/pull/1549#discussion_r236069097
##########
File path:
exec/jdbc/src/test/java/org/apache/drill/jdbc/test/TestJdbcQuery.java
##########
@@ -403,4 +407,147 @@ public void testConvertFromInEmptyInputSql() throws
Exception {
.sql("SELECT CONVERT_FROM(columns[1], 'JSON') as col1 from
cp.`empty.csv`")
.returns("");
}
+
+ @Test
+ public void testResultSetIsNotReturnedSet() throws Exception {
+ Statement s = null;
+ try (Connection conn = connect()) {
+ s = conn.createStatement();
+ boolean hasResult = s.execute(String.format("alter session set `%s` =
false", ExecConstants.RETURN_RESULT_SET_FOR_DDL));
+
+ assertFalse("SET query should not return result set", hasResult);
+ assertNull("No result", s.getResultSet());
+ assertNotEquals("Update count should be >= 0", -1, s.getUpdateCount());
Review comment:
Not sure that we should also verify `updateCount` value. It is required to
check that there is no result set.
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> Introduce option to disable result set on CTAS, create view and drop
> table/view etc. for JDBC connection
> --------------------------------------------------------------------------------------------------------
>
> Key: DRILL-6834
> URL: https://issues.apache.org/jira/browse/DRILL-6834
> Project: Apache Drill
> Issue Type: Improvement
> Reporter: Bohdan Kazydub
> Assignee: Bohdan Kazydub
> Priority: Major
> Labels: doc-impacting
> Fix For: 1.15.0
>
>
> There are some tools (Unica, dBeaver, TalenD) that do not expect to obtain
> result set on CTAS query. As a result the query gets canceled. Hive, on the
> other hand, does not return result set for the query and these tools work
> well.
> To improve Drill's integration with such tools a session option
> {{`drill.exec.fetch_resultset_for_ddl`}} is introduced. If the option is
> enabled (set to `true`) Drill's behaviour will be unchanged, i.e. all result
> set will be returned for all queries. If the option is disabled (set to
> `false`), CTAS, CREATE VIEW, CREATE FUNCTION, DROP TABLE, DROP VIEW, DROP
> FUNCTION, USE schema, SET option, REFRESH METADATA TABLE etc. queries will
> not return result set but {{updateCount}} instead.
> The option affects JDBC connections only.
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