Konstantin Orlov created IGNITE-21887:
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Summary: Sql. Reuse caller thread if query already prepared
Key: IGNITE-21887
URL: https://issues.apache.org/jira/browse/IGNITE-21887
Project: Ignite
Issue Type: Improvement
Components: sql
Reporter: Konstantin Orlov
Assignee: Konstantin Orlov
As of now, processing of the query unconditionally passed to the `sql-exec`
thread. Although such behavior is rather correct, it introduces additional
penalty in terms of increased latency. For short queries, like point lookup,
this latency in fact is longer than the time of operation itself.
To improve latency of short queries, let's reuse caller thread to initialize
query execution. It's important to make sure we are not hijacking caller thread
for long (on every stage of query initialization we either have to use cached
results, or pass the preparation to `sql-exec` thread).
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