vvysotskyi 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_r269711718
########## 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; + 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++; + } + rs.close(); + 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++; + } + rs.close(); + assertEquals(valueToSet, rowCount); + } + } + + /** + * Test setting maxSize at a value higher than existing query limit + */ + @Test + public void testSetMaxRowsHigherThanQueryLimit() throws SQLException { + try (PreparedStatement pStmt = connection.prepareStatement(SYS_OPTIONS_SQL_LIMIT_10)) { + int valueToSet = RANDOMIZER.nextInt(10)+11; //range:[11-20] + pStmt.setMaxRows(valueToSet); + pStmt.executeQuery(); + ResultSet rs = pStmt.getResultSet(); + int rowCount = 0; + while (rs.next()) { + rs.getBytes(1); + rowCount++; + } + rs.close(); + assertTrue(valueToSet > rowCount); + } + } + + /** + * Test setting maxSize at a value lower than existing SYSTEM limit + */ + @Test + public void testSetMaxRowsLowerThanSystemLimit() throws SQLException { + int sysValueToSet = RANDOMIZER.nextInt(5)+6; //range:[6-10] + setSystemMaxRows(sysValueToSet); + try (PreparedStatement pStmt = connection.prepareStatement(SYS_OPTIONS_SQL)) { + int valueToSet = RANDOMIZER.nextInt(5)+1; //range:[1-5] + pStmt.setMaxRows(valueToSet); + pStmt.executeQuery(); + ResultSet rs = pStmt.getResultSet(); + int rowCount = 0; + while (rs.next()) { + rs.getBytes(1); + rowCount++; + } + rs.close(); + assertEquals(valueToSet, rowCount); + } + setSystemMaxRows(0); //RESET + } + + /** + * Test setting maxSize at a value higher than existing SYSTEM limit + */ + @Test + public void testSetMaxRowsHigherThanSystemLimit() throws SQLException { + int sysValueToSet = RANDOMIZER.nextInt(5)+6; //range:[6-10] Review comment: ```suggestion int sysValueToSet = RANDOMIZER.nextInt(5) + 6; // range: [6-10] ``` ---------------------------------------------------------------- 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