Call ResultSet.next() function failed when expect to select 200k utf8 column size from a table

[Yu Bo]

Defect Description:

There is a table that columns charset as utf8, when expect to return 200K column size, it is failed to call ResultSet.next() function.

Test Environment:

sqws139.houston.hp.com, T2 driver.

Test Steps:

Step 1. Create a table as below,

sql = "create table tblcolumnsize200kWithUTF8(c1 char(50000) character set UTF8 collate default null, c2 char(50000) character set UTF8 collate default null)";
iRet = stmt.executeUpdate(sql);

Step 2. Insert 20K utf8 column size into the above table.

Step 3. Execute query as below,

sql = "select left(rtrim(t.c1), 50000) as o1 from tblcolumnsize200kWithUTF8 as t";
rs = stmt.executeQuery(sql);

Step 4. Compare the first column o1 size returned from ResultSet object.

rs.next();
assertEquals(50000, (URLDecoder.decode(rs.getObject(1).toString(), "UTF-8")).length());

At the Step 4, it will throw an exception as below,

java.lang.NegativeArrayizeException

                 at org.trafodion.jdbc.t2.SQLMXResultSet.fetchN(Native Method)
                 at org.trafodion.jdbc.t2.SQLMXResultSet.next(SQLMXResultSet.java:2478)
                 ...

[Weiqing Xu (wei-qing-xu)]

Here is the code review link: https://review.trafodion.org/#/c/1671/