Thread: pgsql: Perform slot validity checks in a separate pass overexpression.
Perform slot validity checks in a separate pass over expression. This reduces code duplication a bit, but the primary benefit that it makes JITing expression evaluation easier. When doing so we can't, as previously done in the interpreted case, really change opcode without recompiling. Nor dow we just carry around unnecessary branches to avoid re-checking over and over. As a minor side-effect this makes ExecEvalStepOp() O(log(N)) rather than O(N). Author: Andres Freund Discussion: https://postgr.es/m/20170901064131.tazjxwus3k2w3ybh@alap3.anarazel.de Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/b40933101ca622aa8a35b6fe07ace36effadf1c7 Modified Files -------------- src/backend/executor/execExpr.c | 7 +- src/backend/executor/execExprInterp.c | 277 ++++++++++++++++++---------------- src/include/executor/execExpr.h | 14 +- src/include/nodes/execnodes.h | 3 + 4 files changed, 165 insertions(+), 136 deletions(-)