Jason Altekruse created DRILL-2395:
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Summary: Improve interpreted expression evaluation to only call
the setup method once per batch
Key: DRILL-2395
URL: https://issues.apache.org/jira/browse/DRILL-2395
Project: Apache Drill
Issue Type: Improvement
Components: Functions - Drill
Reporter: Jason Altekruse
Assignee: Daniel Barclay (Drill)
Priority: Minor
This enhancement request came out of the review for a patch for DRILL-2060.
Copied below is the discussion from there:
Jinfeng:
Do you have a plan to move setup() call into places such that setup() will be
called once for each VectorAccessible input?
In the code compile + evaluation model, doSetup() will be called per batch, in
stead of per row.
Jason:
I have started working on a fix for this. Its a little complicated with setting
constant inputs before the setup method is called. I'm trying to figure out the
best way to share code with the rest of the input passing used in the
EvalVisitor. Would you be okay with this being opened as an enhancement request
to be merged a little later? Considering the current use of the interpreter
this won't have an impact on any actual queries today.
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