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ea0c97d590
Common time-series rollups are of the form SELECT date_trunc(const, time) as t, aggregates... GROUP BY t ORDER BY t DESC LIMIT const2. Previously, Postgres would not optimize such queries because it could not match date_trunc(const, time) to any indexes on time, since it has no way to know that a sort on time is always a valid sort on date_trunc(const, time). This commit implements this optimization for date_trunc but it could apply to a wider range of functions, to be implemented later.
7 lines
85 B
SQL
7 lines
85 B
SQL
\o /dev/null
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\ir include/create_single_db.sql
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\o
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\ir include/sql_query_results.sql
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