| 402f9bcf48cbccc17fdb5f3ea411a7967aed0fd0 |
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17-Jul-2017 |
Timo Sirainen <timo.sirainen@dovecot.fi> |
lib-sql: Add API support for asynchronously iterating over rows.
sql_query() can already do an async lookup, but the full result needs
to be available immediately. This can be inefficient for large results.
Add a new SQL_RESULT_NEXT_MORE return value and sql_result_more() for
asynchronously requesting more results.
This changes the API a bit, but isn't done by default by any drivers yet.
Also callers that can't handle this are hopefully checking for "ret < 0",
which allows them to handle such an async-more request as an error
instead.
sql_result_next_row() will be changed to return enum in a separate commit to
keep backwards compatibility in v2.2.x. |