IGNITE-26314 (minor) Set default fetchSize.

Author: xtern

modules/jdbc/src/main/java/org/apache/ignite/internal/jdbc2/JdbcStatement2.java

@@ -512,7 +512,8 @@ public int getFetchDirection() throws SQLException {
 
     /**
      * Gives the JDBC driver a hint as to the number of rows that should
-     * be fetched from the database.
+     * be fetched from the database. If the value specified is zero, then
+     * the hint is ignored. The default value is zero.
      *
      * <p>Note: the current implementation does not provide any means to change the number
      * of rows after the statement has executed. Thus, changing this value after the statement

modules/jdbc/src/test/java/org/apache/ignite/internal/jdbc2/JdbcStatement2SelfTest.java

@@ -263,6 +263,9 @@ public void setFetchSize() throws SQLException {
             stmt.setFetchSize(1000);
             assertEquals(1000, stmt.getFetchSize());
 
+            stmt.setFetchSize(0);
+            assertEquals(0, stmt.getFetchSize());
+
             assertThrowsSqlException(SQLException.class,
                     "Invalid fetch size.",
                     () -> stmt.setFetchSize(-1)