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Add special case fast-paths for strict functions

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Many STRICT function calls will have one or two arguments, in which
case we can speed up checking for NULL input by avoiding setting up
a loop over the arguments. This adds EEOP_FUNCEXPR_STRICT_1 and the
corresponding EEOP_FUNCEXPR_STRICT_2 for functions with one and two
arguments respectively.

Author: Andres Freund <andres@anarazel.de>
Co-authored-by: Daniel Gustafsson <daniel@yesql.se>
Reviewed-by: Andreas Karlsson <andreas@proxel.se>
Discussion: https://postgr.es/m/415721CE-7D2E-4B74-B5D9-1950083BA03E@yesql.se
Discussion: https://postgr.es/m/20191023163849.sosqbfs5yenocez3@alap3.anarazel.de
This commit is contained in:
Daniel Gustafsson
2025-03-11 12:02:42 +01:00
parent 8dd7c7cd0a
commit d35d32d711
4 changed files with 96 additions and 5 deletions
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7
src/include/executor/execExpr.h
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@@ -116,11 +116,13 @@ typedef enum ExprEvalOp
/*
* Evaluate function call (including OpExprs etc). For speed, we
* distinguish in the opcode whether the function is strict and/or
* requires usage stats tracking.
* distinguish in the opcode whether the function is strict with 1, 2, or
* more arguments and/or requires usage stats tracking.
*/
EEOP_FUNCEXPR,
EEOP_FUNCEXPR_STRICT,
EEOP_FUNCEXPR_STRICT_1,
EEOP_FUNCEXPR_STRICT_2,
EEOP_FUNCEXPR_FUSAGE,
EEOP_FUNCEXPR_STRICT_FUSAGE,
@@ -276,6 +278,7 @@ typedef enum ExprEvalOp
EEOP_AGG_STRICT_DESERIALIZE,
EEOP_AGG_DESERIALIZE,
EEOP_AGG_STRICT_INPUT_CHECK_ARGS,
EEOP_AGG_STRICT_INPUT_CHECK_ARGS_1,
EEOP_AGG_STRICT_INPUT_CHECK_NULLS,
EEOP_AGG_PLAIN_PERGROUP_NULLCHECK,
EEOP_AGG_PLAIN_TRANS_INIT_STRICT_BYVAL,