On 11/03/2013 7:47 AM, Clemens Ladisch wrote:
James K. Lowden wrote:
I'm not sure how to manage the lifetime of ancillary data for a
user-defined function added by sqlite3_create_function ().
[...]
Suppose xStep doesn't fail, but another query is executing
simultaneously, also using the median() UDF. I need one data structure
per context. I don't see support for that in the SQLite API.
http://www.sqlite.org/c3ref/aggregate_context.html
Just be careful, because that API doesn't let you resize the allocation...
Ryan
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