Fix #3027 get TINYINT and SMALLINT as INTEGER (#3028)

sharding-core/sharding-core-execute/src/main/java/org/apache/shardingsphere/core/execute/sql/execute/result/QueryResultUtil.java

@@ -52,9 +52,7 @@ public final class QueryResultUtil {
             case Types.BOOLEAN:
                 return resultSet.getBoolean(columnIndex);
             case Types.TINYINT:
-                return resultSet.getByte(columnIndex);
             case Types.SMALLINT:
-                return resultSet.getShort(columnIndex);
             case Types.INTEGER:
                 return resultSet.getInt(columnIndex);
             case Types.BIGINT:

sharding-core/sharding-core-execute/src/test/java/org/apache/shardingsphere/core/execute/sql/execute/result/QueryResultUtilTest.java

@@ -74,15 +74,15 @@ public final class QueryResultUtilTest {
     @Test
     public void assertGetValueByTinyint() throws SQLException {
         when(resultSetMetaData.getColumnType(1)).thenReturn(Types.TINYINT);
-        when(resultSet.getByte(1)).thenReturn(Byte.MAX_VALUE);
-        assertThat((byte) QueryResultUtil.getValue(resultSet, 1), is(Byte.MAX_VALUE));
+        when(resultSet.getInt(1)).thenReturn(Integer.MAX_VALUE);
+        assertThat((int) QueryResultUtil.getValue(resultSet, 1), is(Integer.MAX_VALUE));
     }
     
     @Test
     public void assertGetValueBySmallint() throws SQLException {
         when(resultSetMetaData.getColumnType(1)).thenReturn(Types.SMALLINT);
-        when(resultSet.getShort(1)).thenReturn(Short.MAX_VALUE);
-        assertThat((short) QueryResultUtil.getValue(resultSet, 1), is(Short.MAX_VALUE));
+        when(resultSet.getInt(1)).thenReturn(Integer.MAX_VALUE);
+        assertThat((int) QueryResultUtil.getValue(resultSet, 1), is(Integer.MAX_VALUE));
     }
     
     @Test