kkhatua commented on a change in pull request #1714: DRILL-7048: Implement JDBC Statement.setMaxRows() with System Option URL: https://github.com/apache/drill/pull/1714#discussion_r269251734
########## 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("VALIDATION ERROR: Option exec.query.max_rows must be between 0 and ") ); + } + } + } + + /** + * Test setting a valid maxRows value + */ + @Test + public void testValidSetMaxRows() throws SQLException { + try (PreparedStatement pStmt = connection.prepareStatement(SYS_OPTIONS_SQL)) { + //Setting positive value + int valueToSet = RANDOMIZER.nextInt(59)+1; + logger.info("Setting maximum resultset size as {} rows", valueToSet); + pStmt.setMaxRows(valueToSet); + assertEquals( valueToSet, pStmt.getMaxRows() ); + } + } + + /** + * Test setting maxSize as zero (i.e. no Limit) + */ + @Test + public void testSetMaxRowsAsZero() throws SQLException { + try (PreparedStatement pStmt = connection.prepareStatement(SYS_OPTIONS_SQL)) { + pStmt.setMaxRows(0); + pStmt.execute(); + ResultSet rs = pStmt.getResultSet(); + int rowCount = 0; + while (rs.next()) { + rs.getBytes(1); + rowCount++; + } + assertTrue(rowCount > 0); + } + } + + /** + * Test setting maxSize at a value lower than existing query limit + */ + @Test + public void testSetMaxRowsLowerThanQueryLimit() throws SQLException { + try (PreparedStatement pStmt = connection.prepareStatement(SYS_OPTIONS_SQL_LIMIT_10)) { + int valueToSet = RANDOMIZER.nextInt(9)+1; //range:[1-9] + pStmt.setMaxRows(valueToSet); + pStmt.executeQuery(); + ResultSet rs = pStmt.getResultSet(); + int rowCount = 0; + while (rs.next()) { + rs.getBytes(1); + rowCount++; + } + logger.info("MaxRows was set as {} and query limited to 10 returned a resultSet of {} rows", valueToSet, rowCount); Review comment: ~~Same as previous comment regarding `final`~~ ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services