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Add pg_analyze_and_rewrite_varparams()

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This new function extracts common code from PrepareQuery() and
exec_parse_message().  It is then exactly analogous to the existing
pg_analyze_and_rewrite_fixedparams() and
pg_analyze_and_rewrite_withcb().

To unify these two code paths, this makes PrepareQuery() now subject
to log_parser_stats.  Also, both paths now invoke
TRACE_POSTGRESQL_QUERY_REWRITE_START().  PrepareQuery() no longer
checks whether a utility statement was specified.  The grammar doesn't
allow that anyway, and exec_parse_message() supports it, so
restricting it doesn't seem necessary.

This also adds QueryEnvironment support to the *varparams functions,
for consistency with its cousins, even though it is not used right
now.

Reviewed-by: Nathan Bossart <bossartn@amazon.com>
Discussion: https://www.postgresql.org/message-id/flat/c67ce276-52b4-0239-dc0e-39875bf81840@enterprisedb.com
This commit is contained in:
Peter Eisentraut
2022-03-04 14:49:37 +01:00
parent 5e0e99a80b
commit 25751f54b8
5 changed files with 78 additions and 72 deletions
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5
src/include/tcop/tcopprot.h
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@@ -49,6 +49,11 @@ extern List *pg_analyze_and_rewrite_fixedparams(RawStmt *parsetree,
const char *query_string,
const Oid *paramTypes, int numParams,
QueryEnvironment *queryEnv);
extern List *pg_analyze_and_rewrite_varparams(RawStmt *parsetree,
const char *query_string,
Oid **paramTypes,
int *numParams,
QueryEnvironment *queryEnv);
extern List *pg_analyze_and_rewrite_withcb(RawStmt *parsetree,
const char *query_string,
ParserSetupHook parserSetup,