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ARROW-17005: [Java] Allow overriding column nullability in arrow-jdbc
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107
java/adapter/jdbc/src/test/java/org/apache/arrow/adapter/jdbc/ResultSetUtilityTest.java
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You under the Apache License, Version 2.0 | ||
| * (the "License"); you may not use this file except in compliance with | ||
| * the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
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| package org.apache.arrow.adapter.jdbc; | ||
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| import static org.junit.Assert.assertEquals; | ||
| import static org.junit.Assert.assertFalse; | ||
| import static org.junit.Assert.assertNotNull; | ||
| import static org.junit.Assert.assertTrue; | ||
| import static org.junit.jupiter.api.Assertions.assertThrows; | ||
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| import java.sql.ResultSet; | ||
| import java.sql.SQLException; | ||
| import java.sql.Types; | ||
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| import org.apache.arrow.memory.BufferAllocator; | ||
| import org.apache.arrow.memory.RootAllocator; | ||
| import org.apache.arrow.vector.VectorSchemaRoot; | ||
| import org.junit.Test; | ||
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| /** Tests of the ResultSetUtility. */ | ||
| public class ResultSetUtilityTest { | ||
| @Test | ||
| public void testZeroRowResultSet() throws Exception { | ||
| for (boolean reuseVectorSchemaRoot : new boolean[]{false, true}) { | ||
| try (BufferAllocator allocator = new RootAllocator(Integer.MAX_VALUE)) { | ||
| ResultSet rs = ResultSetUtility.generateEmptyResultSet(); | ||
| JdbcToArrowConfig config = new JdbcToArrowConfigBuilder( | ||
| allocator, JdbcToArrowUtils.getUtcCalendar(), /* include metadata */ false) | ||
| .setReuseVectorSchemaRoot(reuseVectorSchemaRoot) | ||
| .build(); | ||
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| ArrowVectorIterator iter = JdbcToArrow.sqlToArrowVectorIterator(rs, config); | ||
| assertTrue("Iterator on zero row ResultSet should haveNext() before use", iter.hasNext()); | ||
| VectorSchemaRoot root = iter.next(); | ||
| assertNotNull("VectorSchemaRoot from first next() result should never be null", root); | ||
| assertEquals("VectorSchemaRoot from empty ResultSet should have zero rows", 0, root.getRowCount()); | ||
| assertFalse("hasNext() should return false on empty ResultSets after initial next() call", iter.hasNext()); | ||
| } | ||
| } | ||
| } | ||
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| @Test | ||
| public void testBasicResultSet() throws Exception { | ||
| try (ResultSetUtility.MockResultSet resultSet = ResultSetUtility.generateBasicResultSet(3)) { | ||
| // Before row 1: | ||
| assertTrue(resultSet.isBeforeFirst()); | ||
| assertFalse(resultSet.isFirst()); | ||
| assertFalse(resultSet.isLast()); | ||
| assertFalse(resultSet.isAfterLast()); | ||
| assertThrows(SQLException.class, () -> resultSet.getString(1)); | ||
|
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| // Row 1: | ||
| assertTrue(resultSet.next()); | ||
| assertFalse(resultSet.isBeforeFirst()); | ||
| assertTrue(resultSet.isFirst()); | ||
| assertFalse(resultSet.isLast()); | ||
| assertFalse(resultSet.isAfterLast()); | ||
| assertEquals("row number: 1", resultSet.getString(1)); | ||
|
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| // Row 2: | ||
| assertTrue(resultSet.next()); | ||
| assertFalse(resultSet.isBeforeFirst()); | ||
| assertFalse(resultSet.isFirst()); | ||
| assertFalse(resultSet.isLast()); | ||
| assertFalse(resultSet.isAfterLast()); | ||
| assertEquals("row number: 2", resultSet.getString(1)); | ||
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| // Row 3: | ||
| assertTrue(resultSet.next()); | ||
| assertFalse(resultSet.isBeforeFirst()); | ||
| assertFalse(resultSet.isFirst()); | ||
| assertTrue(resultSet.isLast()); | ||
| assertFalse(resultSet.isAfterLast()); | ||
| assertEquals("row number: 3", resultSet.getString(1)); | ||
|
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| // After row 3: | ||
| assertFalse(resultSet.next()); | ||
| assertFalse(resultSet.isBeforeFirst()); | ||
| assertFalse(resultSet.isFirst()); | ||
| assertFalse(resultSet.isLast()); | ||
| assertTrue(resultSet.isAfterLast()); | ||
| } | ||
| } | ||
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| @Test | ||
| public void testMockDataTypes() throws SQLException { | ||
| ResultSetUtility.MockDataElement element = new ResultSetUtility.MockDataElement(1L, Types.NUMERIC); | ||
| assertEquals(1L, element.getLong()); | ||
| assertEquals(1, element.getInt()); | ||
| assertEquals("1", element.getString()); | ||
| } | ||
| } |
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