Read a large result set in chunks from mysql

Posted by ripper234 on Stack Overflow See other posts from Stack Overflow or by ripper234
Published on 2010-01-11T06:32:38Z Indexed on 2010/04/19 14:23 UTC
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I am trying to read a huge result set from mysql. Reading them in a straight-forward manner didn't work, as mysql tries to return all results together, which times out.

I found the following piece of code which tells mysql to read the results back one at a time:

stmt = conn.createStatement(java.sql.ResultSet.TYPE_FORWARD_ONLY, java.sql.ResultSet.CONCUR_READ_ONLY);
stmt.setFetchSize(Integer.MIN_VALUE);

Can I read a chunk at a time instead of one by one? I've tried setting fetch size to a different value, but it doesn't work.

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