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spring jdbc support and large dataset


spring jdbc support and large dataset  using -'java,oracle,spring,jdbc'

When using one of the various JDBC template methods I am confused on how to iterate/scroll over large result sets (which won't fit into memory). Even without a direct exposure of an Iterable interface I would at least expect instances of RowCallbackHandler to get called while the query is executing not after it's finished (or the heap overfloats).

I did have a look a at this (which changed nothing for me despite being similar in spirit to this post on stack overflow) and at this post in the spring forums. The latter seems to suggest that the callback handler should indeed get called while the cursor is fetching data. My tests however show no such behaviour.

The database is an Oracle10g. I am using the 11.1.0.7.0-Production driver and Spring 2.5.6.SEC01. Any ideas anyone how to iterate over result sets, preferably while keeping the mapping logic of RowMapper etc.?
    
asked Sep 16, 2015 by kinnari
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