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Posted to dev@ignite.apache.org by "Andrew Mashenkov (JIRA)" <ji...@apache.org> on 2016/10/05 13:24:21 UTC
[jira] [Created] (IGNITE-4035) SQL: Avoid excessive calls of
deterministic functions on same arguments
Andrew Mashenkov created IGNITE-4035:
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Summary: SQL: Avoid excessive calls of deterministic functions on same arguments
Key: IGNITE-4035
URL: https://issues.apache.org/jira/browse/IGNITE-4035
Project: Ignite
Issue Type: Improvement
Components: SQL
Affects Versions: 1.7, 1.6
Reporter: Andrew Mashenkov
In sql query example below, heavy "datediff" deterministic function will be called 4 times per row. I'd expect function call once per row.
It seems deterministic flag semantic is broken.
Example:
{noformat}
Select
avg(datediff('s',ts1,ts2)) as avg_diff,
min(datediff('s',ts1,ts2)) as min_diff,
max(datediff('s',ts1,ts2)) as max_diff
From table
{noformat}
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