Fix ExecuteCallStmt to not scribble on the passed-in parse tree.
Modifying the parse tree at execution time is, or at least ought to be,
verboten. It seems quite difficult to actually cause a crash this way
in v11 (although you can exhibit it pretty easily in HEAD by messing
with plan_cache_mode). Nonetheless, it's risky, so fix and back-patch.
Discussion: https://postgr.es/m/13789.1541359611@sss.pgh.pa.us
Branch
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master
Details
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https://git.postgresql.org/pg/commitdiff/9b6fb9fbb48dda828dcca47adc418632ddb36202
Modified Files
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src/backend/commands/functioncmds.c | 23 ++++++++++++++++++-----
1 file changed, 18 insertions(+), 5 deletions(-)