Examples of java.sql.Statement.executeBatch()

java.sql.Statement.executeBatch()
Submits a batch of SQL commands to the database. Returns an array of update counts, if all the commands execute successfully.
If one of the commands in the batch fails, this method can throw a BatchUpdateException and the JDBC driver may or may not process the remaining commands. The JDBC driver must behave consistently with the underlying database, either always continuing or never continuing. If the driver continues processing, the array of results returned contains the same number of elements as there are commands in the batch, with a minimum of one of the elements having the EXECUTE_FAILED value. @return an array of update counts, with one entry for each command in thebatch. The elements are ordered according to the order in which the commands were added to the batch.
1. If the value of an element is >=0, the corresponding command completed successfully and the value is the update count for that command, which is the number of rows in the database affected by the command.
2. If the value is SUCCESS_NO_INFO, the command completed successfully but the number of rows affected is unknown.
4. If the value is EXECUTE_FAILED, the command failed.
@throws SQLException if an error occurs accessing the database

    ctrlStatement.setReturnValue(mockConnection);
    mockStatement.addBatch(sql[0]);
    ctrlStatement.setVoidCallable();
    mockStatement.addBatch(sql[1]);
    ctrlStatement.setVoidCallable();
    mockStatement.executeBatch();
    ctrlStatement.setReturnValue(new int[] {1, 1});
    if (debugEnabled) {
      mockStatement.getWarnings();
      ctrlStatement.setReturnValue(null);
    }

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        stmt.addBatch("create table ddltsttable1(c1 int)");
        stmt.addBatch("create procedure ddlinteg() language java " +
            "parameter style java external name 'java.lang.Integer'");
        stmt.addBatch("create table ddltable2(c1 date)");
        int expectedCount[] = {0,0,0};
        assertBatchUpdateCounts(expectedCount, stmt.executeBatch());
        ResultSet rs = stmt.executeQuery(
            "select count(*) from SYS.SYSTABLES where CAST(tablename AS VARCHAR(128)) like 'DDL%'");
        JDBC.assertSingleValueResultSet(rs, "2");
        rs = stmt.executeQuery(
            "select count(*) from SYS.SYSALIASES where CAST(alias AS VARCHAR(128)) like 'DDL%'");

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        Statement stmt = createStatement();
 
        // try executing a batch which nothing in it. Should work.
        println("Positive Statement: clear the batch and run the empty batch");
        stmt.clearBatch();
        assertBatchUpdateCounts(new int[0], stmt.executeBatch());


        stmt.close();
        commit();
    }

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        Statement stmt = createStatement();
        println("Positive Statement: testing 1 statement batch");
        stmt.addBatch("insert into t1 values(2)");


        assertBatchUpdateCounts(new int[] {1}, stmt.executeBatch());
        stmt.close();
        commit();
    }
    
    // try executing a batch with 3 different statements in it.

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        println("Positive Statement: testing 2 inserts and 1 update batch");
        stmt.addBatch("insert into t1 values(2)");
        stmt.addBatch("update t1 set c1=4");
        stmt.addBatch("insert into t1 values(3)");


        assertBatchUpdateCounts(new int[] {1,1,1}, stmt.executeBatch());
        
        rs = stmt.executeQuery("select count(*) from t1 where c1=2");
        rs.next();
        assertEquals("expect 0 rows with c1 = 2", 0, rs.getInt(1));
        rs.close();

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        println("Positive Statement: 1000 statements batch");
        for (int i=0; i<1000; i++){
            stmt.addBatch("insert into t1 values(1)");
        }
        updateCount = stmt.executeBatch();
        
        int[] expectedUpdateCount = new int[1000];
        Arrays.fill(expectedUpdateCount, 1);
        assertBatchUpdateCounts(expectedUpdateCount, updateCount);

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        // try batch with autocommit true
        println("Positive Statement: stmt testing with autocommit true");
        stmt.addBatch("insert into t1 values(1)");
        stmt.addBatch("insert into t1 values(1)");
        stmt.addBatch("delete from t1");
        assertBatchUpdateCounts(new int[] {1,1,2}, stmt.executeBatch());


        assertTableRowCount("T1", 0);
        
        stmt.close();
    }

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        stmt.addBatch("insert into t1 values(2)");
        stmt.addBatch("insert into t1 values(2)");
        stmt.clearBatch();


        // Batch should be cleared, there should be no update count
        assertBatchUpdateCounts(new int[0], stmt.executeBatch());
        assertTableRowCount("T1", 0);


        println("Positive Statement: add 3 statements, clear batch, " +
            "add 3 more statements and execute batch");
        stmt.addBatch("insert into t1 values(2)");

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        stmt.clearBatch();
        stmt.addBatch("insert into t1 values(2)");
        stmt.addBatch("insert into t1 values(2)");
        stmt.addBatch("insert into t1 values(2)");


        assertBatchUpdateCounts(new int[] {1,1,1}, stmt.executeBatch());
        assertTableRowCount("T1", 3);


        stmt.close();
        commit();
    }

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            }
        }
        else if (usingDerbyNetClient())
        {
            stmt.executeQuery("SELECT * FROM SYS.SYSTABLES");
            updateCount = stmt.executeBatch();
            assertBatchUpdateCounts(new int[] {1}, updateCount);
            // set to same spot as embedded
            rollback();
        }

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