postgres

Author SHA1 Message Date

Author	SHA1	Message	Date
Tom Lane	14e5680eee	Improve parser's reporting of statement start locations. Up to now, the parser's reporting of a statement's stmt_location included any preceding whitespace or comments. This isn't really desirable but was done to avoid accounting honestly for nonterminals that reduce to empty. It causes problems for pg_stat_statements, which partially compensates by manually stripping whitespace, but is not bright enough to strip /*-style comments. There will be more problems with an upcoming patch to improve reporting of errors in extension scripts, so it's time to do something about this. The thing we have to do to make it work right is to adjust YYLLOC_DEFAULT to scan the inputs of each production to find the first one that has a valid location (i.e., did not reduce to empty). In theory this adds a little bit of per-reduction overhead, but in practice it's negligible. I checked by measuring the time to run raw_parser() on the contents of information_schema.sql, and there was basically no change. Having done that, we can rely on any nonterminal that didn't reduce to completely empty to have a correct starting location, and we don't need the kluges the stmtmulti production formerly used. This should have a side benefit of allowing parse error reports to include an error position in some cases where they formerly failed to do so, due to trying to report the position of an empty nonterminal. I did not go looking for an example though. The one previously known case where that could happen (OptSchemaEltList) no longer needs the kluge it had; but I rather doubt that that was the only case. Discussion: https://postgr.es/m/ZvV1ClhnbJLCz7Sm@msg.df7cb.de	1 year ago
Alexander Korotkov	6ab1dbd26b	Add NOT NULL checking of pg_stat_statements_reset() in tests This is preliminary patch. It adds NOT NULL checking for the result of pg_stat_statements_reset() function. It is needed for upcoming patch "Track statement entry timestamp" that will change the result type of this function to the timestamp of a reset performed. Discussion: https://postgr.es/m/flat/72e80e7b160a6eb189df9ef6f068cce3765d37f8.camel%40moonset.ru Author: Andrei Zubkov Reviewed-by: Julien Rouhaud, Hayato Kuroda, Yuki Seino, Chengxi Sun Reviewed-by: Anton Melnikov, Darren Rush, Michael Paquier, Sergei Kornilov Reviewed-by: Alena Rybakina, Andrei Lepikhov	2 years ago
Michael Paquier	d0028e35a0	Refactor more the regression tests of pg_stat_statements This commit expands more the refactoring of the regression tests of pg_stat_statements, with tests moved out of pg_stat_statements.sql into separate files. The following file structure is now used: - select is mostly the former pg_stat_statements.sql, renamed. - dml for INSERT/UPDATE/DELETE and MERGE - user_activity, to test role-level checks and stat resets. - wal, to check the WAL generation after some queries. Like `e8dbdb1`, there is no change in terms of code coverage or results, and this finishes the split I was aiming for in these tests. Most of the tests used "test" of "pgss_test" as names for the tables used, these are renamed to less generic names. Reviewed-by: Bertrand Drouvot Discussion: https://postgr.es/m/Y/7Y9U/y/keAW3qH@paquier.xyz	3 years ago

Tom Lane

Improve parser's reporting of statement start locations.

Up to now, the parser's reporting of a statement's stmt_location
included any preceding whitespace or comments.  This isn't really
desirable but was done to avoid accounting honestly for nonterminals
that reduce to empty.  It causes problems for pg_stat_statements,
which partially compensates by manually stripping whitespace, but
is not bright enough to strip /*-style comments.  There will be
more problems with an upcoming patch to improve reporting of errors
in extension scripts, so it's time to do something about this.

The thing we have to do to make it work right is to adjust
YYLLOC_DEFAULT to scan the inputs of each production to find the
first one that has a valid location (i.e., did not reduce to
empty).  In theory this adds a little bit of per-reduction overhead,
but in practice it's negligible.  I checked by measuring the time
to run raw_parser() on the contents of information_schema.sql, and
there was basically no change.

Having done that, we can rely on any nonterminal that didn't reduce
to completely empty to have a correct starting location, and we don't
need the kluges the stmtmulti production formerly used.

This should have a side benefit of allowing parse error reports to
include an error position in some cases where they formerly failed to
do so, due to trying to report the position of an empty nonterminal.
I did not go looking for an example though.  The one previously known
case where that could happen (OptSchemaEltList) no longer needs the
kluge it had; but I rather doubt that that was the only case.

Discussion: https://postgr.es/m/ZvV1ClhnbJLCz7Sm@msg.df7cb.de

1 year ago

Alexander Korotkov

6ab1dbd26b

Add NOT NULL checking of pg_stat_statements_reset() in tests

This is preliminary patch.  It adds NOT NULL checking for the result of
pg_stat_statements_reset() function. It is needed for upcoming patch
"Track statement entry timestamp" that will change the result type of
this function to the timestamp of a reset performed.

Discussion: https://postgr.es/m/flat/72e80e7b160a6eb189df9ef6f068cce3765d37f8.camel%40moonset.ru
Author: Andrei Zubkov
Reviewed-by: Julien Rouhaud, Hayato Kuroda, Yuki Seino, Chengxi Sun
Reviewed-by: Anton Melnikov, Darren Rush, Michael Paquier, Sergei Kornilov
Reviewed-by: Alena Rybakina, Andrei Lepikhov

2 years ago

Michael Paquier

d0028e35a0

Refactor more the regression tests of pg_stat_statements

This commit expands more the refactoring of the regression tests of
pg_stat_statements, with tests moved out of pg_stat_statements.sql into
separate files.  The following file structure is now used:
- select is mostly the former pg_stat_statements.sql, renamed.
- dml for INSERT/UPDATE/DELETE and MERGE
- user_activity, to test role-level checks and stat resets.
- wal, to check the WAL generation after some queries.

Like e8dbdb1, there is no change in terms of code coverage or results,
and this finishes the split I was aiming for in these tests.  Most of
the tests used "test" of "pgss_test" as names for the tables used, these
are renamed to less generic names.

Reviewed-by: Bertrand Drouvot
Discussion: https://postgr.es/m/Y/7Y9U/y/keAW3qH@paquier.xyz

3 years ago

3 Commits (01463e1cccd33fb11b33a4dd6dbebcad3c534102)