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https://issues.apache.org/jira/browse/DRILL-7048?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16804156#comment-16804156
]
ASF GitHub Bot commented on DRILL-7048:
---------------------------------------
vvysotskyi commented on pull request #1714: DRILL-7048: Implement JDBC
Statement.setMaxRows() with System Option
URL: https://github.com/apache/drill/pull/1714#discussion_r270130908
##########
File path:
exec/jdbc/src/test/java/org/apache/drill/jdbc/PreparedStatementTest.java
##########
@@ -410,6 +417,155 @@ public void testNonTriggeredQueryTimeout() throws
SQLException {
}
}
+ ////////////////////////////////////////
+ // Query maxRows methods:
+
+ /**
+ * Test for reading of default max rows
+ */
+ @Test
+ public void testDefaultGetMaxRows() throws SQLException {
+ try (PreparedStatement pStmt =
connection.prepareStatement(SYS_OPTIONS_SQL)) {
+ int maxRowsValue = pStmt.getMaxRows();
+ assertEquals(0, maxRowsValue);
+ }
+ }
+
+ /**
+ * Test Invalid parameter by giving negative maxRows value
+ */
+ @Test
+ public void testInvalidSetMaxRows() throws SQLException {
+ try (PreparedStatement pStmt =
connection.prepareStatement(SYS_OPTIONS_SQL)) {
+ //Setting negative value
+ int valueToSet = -10;
+ try {
+ pStmt.setMaxRows(valueToSet);
+ } catch (final SQLException e) {
+ assertThat(e.getMessage(), containsString("illegal maxRows value: " +
valueToSet));
Review comment:
It would be good also to check the value of `pStmt.getMaxRows()` after the
failure.
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> Implement JDBC Statement.setMaxRows() with System Option
> --------------------------------------------------------
>
> Key: DRILL-7048
> URL: https://issues.apache.org/jira/browse/DRILL-7048
> Project: Apache Drill
> Issue Type: New Feature
> Components: Client - JDBC, Query Planning & Optimization
> Affects Versions: 1.15.0
> Reporter: Kunal Khatua
> Assignee: Kunal Khatua
> Priority: Major
> Labels: doc-impacting
> Fix For: 1.17.0
>
>
> With DRILL-6960, the webUI will get an auto-limit on the number of results
> fetched.
> Since more of the plumbing is already there, it makes sense to provide the
> same for the JDBC client.
> In addition, it would be nice if the Server can have a pre-defined value as
> well (default 0; i.e. no limit) so that an _admin_ would be able to ensure a
> max limit on the resultset size as well.
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