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[PATCH v68 16/31] pgstat: add pg_stat_exists_stat() for easier testing. 4+ messages / 2 participants [nested] [flat]
* [PATCH v68 16/31] pgstat: add pg_stat_exists_stat() for easier testing. @ 2022-04-02 21:21 Andres Freund <andres@anarazel.de> 0 siblings, 0 replies; 4+ messages in thread From: Andres Freund @ 2022-04-02 21:21 UTC (permalink / raw) Useful for tests. Author: Melanie Plageman <melanieplageman@gmail.com> --- src/include/catalog/pg_proc.dat | 6 ++++++ src/include/pgstat.h | 2 ++ src/backend/catalog/system_functions.sql | 2 ++ src/backend/postmaster/pgstat.c | 9 +++++++++ src/backend/utils/adt/pgstatfuncs.c | 17 +++++++++++++++++ 5 files changed, 36 insertions(+) diff --git a/src/include/catalog/pg_proc.dat b/src/include/catalog/pg_proc.dat index 12526c599e0..948e6504da0 100644 --- a/src/include/catalog/pg_proc.dat +++ b/src/include/catalog/pg_proc.dat @@ -5376,6 +5376,12 @@ proargmodes => '{i,o,o,o,o,o,o,o,o,o,o}', proargnames => '{slot_name,slot_name,spill_txns,spill_count,spill_bytes,stream_txns,stream_count,stream_bytes,total_txns,total_bytes,stats_reset}', prosrc => 'pg_stat_get_replication_slot' }, + +{ oid => '8384', descr => 'statistics: check if a stats object exists', + proname => 'pg_stat_exists_stat', provolatile => 'v', proparallel => 'r', + prorettype => 'bool', proargtypes => 'text oid oid', + prosrc => 'pg_stat_exists_stat' }, + { oid => '8523', descr => 'statistics: information about subscription stats', proname => 'pg_stat_get_subscription_stats', provolatile => 's', proparallel => 'r', diff --git a/src/include/pgstat.h b/src/include/pgstat.h index 3481ba5e262..fae3186c8eb 100644 --- a/src/include/pgstat.h +++ b/src/include/pgstat.h @@ -438,6 +438,8 @@ extern TimestampTz pgstat_get_stat_snapshot_timestamp(bool *have_snapshot); /* helpers */ extern PgStat_Kind pgstat_kind_from_str(char *kind_str); +extern bool pgstat_exists_entry(PgStat_Kind kind, Oid dboid, Oid objoid); + /* * Functions in pgstat_archiver.c diff --git a/src/backend/catalog/system_functions.sql b/src/backend/catalog/system_functions.sql index 81bac6f5812..07386f97f95 100644 --- a/src/backend/catalog/system_functions.sql +++ b/src/backend/catalog/system_functions.sql @@ -639,6 +639,8 @@ REVOKE EXECUTE ON FUNCTION pg_stat_reset_single_function_counters(oid) FROM publ REVOKE EXECUTE ON FUNCTION pg_stat_reset_replication_slot(text) FROM public; +REVOKE EXECUTE ON FUNCTION pg_stat_exists_stat(text, oid, oid) FROM public; + REVOKE EXECUTE ON FUNCTION pg_stat_reset_subscription_stats(oid) FROM public; REVOKE EXECUTE ON FUNCTION lo_import(text) FROM public; diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c index 0a0d64be829..8d619d114b2 100644 --- a/src/backend/postmaster/pgstat.c +++ b/src/backend/postmaster/pgstat.c @@ -835,6 +835,15 @@ pgstat_get_stat_snapshot_timestamp(bool *have_snapshot) return 0; } +bool +pgstat_exists_entry(PgStat_Kind kind, Oid dboid, Oid objoid) +{ + if (pgstat_kind_info_for(kind)->fixed_amount) + return true; + + return pgstat_get_entry_ref(kind, dboid, objoid, false, NULL) != NULL; +} + /* * Ensure snapshot for a kind of global stats exist. * diff --git a/src/backend/utils/adt/pgstatfuncs.c b/src/backend/utils/adt/pgstatfuncs.c index caaf0c5a672..2660bd1eb07 100644 --- a/src/backend/utils/adt/pgstatfuncs.c +++ b/src/backend/utils/adt/pgstatfuncs.c @@ -2395,3 +2395,20 @@ pg_stat_get_subscription_stats(PG_FUNCTION_ARGS) /* Returns the record as Datum */ PG_RETURN_DATUM(HeapTupleGetDatum(heap_form_tuple(tupdesc, values, nulls))); } + +/* + * Checks for presence of stats for object with provided kind, database oid, + * object oid. + * + * This is useful for regression tests, but not much more. + */ +Datum +pg_stat_exists_stat(PG_FUNCTION_ARGS) +{ + char *stats_type = text_to_cstring(PG_GETARG_TEXT_P(0)); + Oid dboid = PG_GETARG_OID(1); + Oid objoid = PG_GETARG_OID(2); + PgStat_Kind kind = pgstat_kind_from_str(stats_type); + + PG_RETURN_BOOL(pgstat_exists_entry(kind, dboid, objoid)); +} -- 2.35.1.677.gabf474a5dd --c4n45bccvxafocvc Content-Type: text/x-diff; charset=us-ascii Content-Disposition: attachment; filename="v68-0017-pgstat-wip-only-reset-pgstat-data-after-crash-re.patch" ^ permalink raw reply [nested|flat] 4+ messages in thread
* [PATCH v69 13/28] pgstat: add pg_stat_exists_stat() for easier testing. @ 2022-04-02 21:21 Andres Freund <andres@anarazel.de> 0 siblings, 0 replies; 4+ messages in thread From: Andres Freund @ 2022-04-02 21:21 UTC (permalink / raw) Useful for tests. Author: Melanie Plageman <melanieplageman@gmail.com> --- src/include/catalog/pg_proc.dat | 6 ++++++ src/include/pgstat.h | 2 ++ src/backend/catalog/system_functions.sql | 2 ++ src/backend/postmaster/pgstat.c | 9 +++++++++ src/backend/utils/adt/pgstatfuncs.c | 17 +++++++++++++++++ 5 files changed, 36 insertions(+) diff --git a/src/include/catalog/pg_proc.dat b/src/include/catalog/pg_proc.dat index 12526c599e0..948e6504da0 100644 --- a/src/include/catalog/pg_proc.dat +++ b/src/include/catalog/pg_proc.dat @@ -5376,6 +5376,12 @@ proargmodes => '{i,o,o,o,o,o,o,o,o,o,o}', proargnames => '{slot_name,slot_name,spill_txns,spill_count,spill_bytes,stream_txns,stream_count,stream_bytes,total_txns,total_bytes,stats_reset}', prosrc => 'pg_stat_get_replication_slot' }, + +{ oid => '8384', descr => 'statistics: check if a stats object exists', + proname => 'pg_stat_exists_stat', provolatile => 'v', proparallel => 'r', + prorettype => 'bool', proargtypes => 'text oid oid', + prosrc => 'pg_stat_exists_stat' }, + { oid => '8523', descr => 'statistics: information about subscription stats', proname => 'pg_stat_get_subscription_stats', provolatile => 's', proparallel => 'r', diff --git a/src/include/pgstat.h b/src/include/pgstat.h index 8386fb5f10d..79e5a579d03 100644 --- a/src/include/pgstat.h +++ b/src/include/pgstat.h @@ -438,6 +438,8 @@ extern TimestampTz pgstat_get_stat_snapshot_timestamp(bool *have_snapshot); /* helpers */ extern PgStat_Kind pgstat_kind_from_str(char *kind_str); +extern bool pgstat_exists_entry(PgStat_Kind kind, Oid dboid, Oid objoid); + /* * Functions in pgstat_archiver.c diff --git a/src/backend/catalog/system_functions.sql b/src/backend/catalog/system_functions.sql index 81bac6f5812..07386f97f95 100644 --- a/src/backend/catalog/system_functions.sql +++ b/src/backend/catalog/system_functions.sql @@ -639,6 +639,8 @@ REVOKE EXECUTE ON FUNCTION pg_stat_reset_single_function_counters(oid) FROM publ REVOKE EXECUTE ON FUNCTION pg_stat_reset_replication_slot(text) FROM public; +REVOKE EXECUTE ON FUNCTION pg_stat_exists_stat(text, oid, oid) FROM public; + REVOKE EXECUTE ON FUNCTION pg_stat_reset_subscription_stats(oid) FROM public; REVOKE EXECUTE ON FUNCTION lo_import(text) FROM public; diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c index bafbcff1eef..6727dc26db5 100644 --- a/src/backend/postmaster/pgstat.c +++ b/src/backend/postmaster/pgstat.c @@ -891,6 +891,15 @@ pgstat_get_stat_snapshot_timestamp(bool *have_snapshot) return 0; } +bool +pgstat_exists_entry(PgStat_Kind kind, Oid dboid, Oid objoid) +{ + if (pgstat_kind_info_for(kind)->fixed_amount) + return true; + + return pgstat_get_entry_ref(kind, dboid, objoid, false, NULL) != NULL; +} + /* * Ensure snapshot for a kind of global stats exist. * diff --git a/src/backend/utils/adt/pgstatfuncs.c b/src/backend/utils/adt/pgstatfuncs.c index caaf0c5a672..2660bd1eb07 100644 --- a/src/backend/utils/adt/pgstatfuncs.c +++ b/src/backend/utils/adt/pgstatfuncs.c @@ -2395,3 +2395,20 @@ pg_stat_get_subscription_stats(PG_FUNCTION_ARGS) /* Returns the record as Datum */ PG_RETURN_DATUM(HeapTupleGetDatum(heap_form_tuple(tupdesc, values, nulls))); } + +/* + * Checks for presence of stats for object with provided kind, database oid, + * object oid. + * + * This is useful for regression tests, but not much more. + */ +Datum +pg_stat_exists_stat(PG_FUNCTION_ARGS) +{ + char *stats_type = text_to_cstring(PG_GETARG_TEXT_P(0)); + Oid dboid = PG_GETARG_OID(1); + Oid objoid = PG_GETARG_OID(2); + PgStat_Kind kind = pgstat_kind_from_str(stats_type); + + PG_RETURN_BOOL(pgstat_exists_entry(kind, dboid, objoid)); +} -- 2.35.1.677.gabf474a5dd --be3jiks7ge4r32o3 Content-Type: text/x-diff; charset=us-ascii Content-Disposition: attachment; filename="v69-0014-pgstat-test-transaction-behaviour-2PC-function-s.patch" ^ permalink raw reply [nested|flat] 4+ messages in thread
* [PATCH v70 17/27] pgstat: add pg_stat_exists_stat() for easier testing. @ 2022-04-02 21:21 Andres Freund <andres@anarazel.de> 0 siblings, 0 replies; 4+ messages in thread From: Andres Freund @ 2022-04-02 21:21 UTC (permalink / raw) Useful for tests. ATODO: bump catversion. Author: Melanie Plageman <melanieplageman@gmail.com> --- src/include/catalog/pg_proc.dat | 6 ++++++ src/include/pgstat.h | 2 ++ src/backend/catalog/system_functions.sql | 2 ++ src/backend/utils/activity/pgstat.c | 9 +++++++++ src/backend/utils/adt/pgstatfuncs.c | 17 +++++++++++++++++ 5 files changed, 36 insertions(+) diff --git a/src/include/catalog/pg_proc.dat b/src/include/catalog/pg_proc.dat index 12526c599e0..948e6504da0 100644 --- a/src/include/catalog/pg_proc.dat +++ b/src/include/catalog/pg_proc.dat @@ -5376,6 +5376,12 @@ proargmodes => '{i,o,o,o,o,o,o,o,o,o,o}', proargnames => '{slot_name,slot_name,spill_txns,spill_count,spill_bytes,stream_txns,stream_count,stream_bytes,total_txns,total_bytes,stats_reset}', prosrc => 'pg_stat_get_replication_slot' }, + +{ oid => '8384', descr => 'statistics: check if a stats object exists', + proname => 'pg_stat_exists_stat', provolatile => 'v', proparallel => 'r', + prorettype => 'bool', proargtypes => 'text oid oid', + prosrc => 'pg_stat_exists_stat' }, + { oid => '8523', descr => 'statistics: information about subscription stats', proname => 'pg_stat_get_subscription_stats', provolatile => 's', proparallel => 'r', diff --git a/src/include/pgstat.h b/src/include/pgstat.h index 4ed8ef887ec..3de316912cf 100644 --- a/src/include/pgstat.h +++ b/src/include/pgstat.h @@ -438,6 +438,8 @@ extern TimestampTz pgstat_get_stat_snapshot_timestamp(bool *have_snapshot); /* helpers */ extern PgStat_Kind pgstat_kind_from_str(char *kind_str); +extern bool pgstat_exists_entry(PgStat_Kind kind, Oid dboid, Oid objoid); + /* * Functions in pgstat_archiver.c diff --git a/src/backend/catalog/system_functions.sql b/src/backend/catalog/system_functions.sql index 81bac6f5812..07386f97f95 100644 --- a/src/backend/catalog/system_functions.sql +++ b/src/backend/catalog/system_functions.sql @@ -639,6 +639,8 @@ REVOKE EXECUTE ON FUNCTION pg_stat_reset_single_function_counters(oid) FROM publ REVOKE EXECUTE ON FUNCTION pg_stat_reset_replication_slot(text) FROM public; +REVOKE EXECUTE ON FUNCTION pg_stat_exists_stat(text, oid, oid) FROM public; + REVOKE EXECUTE ON FUNCTION pg_stat_reset_subscription_stats(oid) FROM public; REVOKE EXECUTE ON FUNCTION lo_import(text) FROM public; diff --git a/src/backend/utils/activity/pgstat.c b/src/backend/utils/activity/pgstat.c index 855f8cfa22b..5d6cae20a4d 100644 --- a/src/backend/utils/activity/pgstat.c +++ b/src/backend/utils/activity/pgstat.c @@ -868,6 +868,15 @@ pgstat_get_stat_snapshot_timestamp(bool *have_snapshot) return 0; } +bool +pgstat_exists_entry(PgStat_Kind kind, Oid dboid, Oid objoid) +{ + if (pgstat_kind_info_for(kind)->fixed_amount) + return true; + + return pgstat_get_entry_ref(kind, dboid, objoid, false, NULL) != NULL; +} + /* * Ensure snapshot for a kind of global stats exist. * diff --git a/src/backend/utils/adt/pgstatfuncs.c b/src/backend/utils/adt/pgstatfuncs.c index caaf0c5a672..2660bd1eb07 100644 --- a/src/backend/utils/adt/pgstatfuncs.c +++ b/src/backend/utils/adt/pgstatfuncs.c @@ -2395,3 +2395,20 @@ pg_stat_get_subscription_stats(PG_FUNCTION_ARGS) /* Returns the record as Datum */ PG_RETURN_DATUM(HeapTupleGetDatum(heap_form_tuple(tupdesc, values, nulls))); } + +/* + * Checks for presence of stats for object with provided kind, database oid, + * object oid. + * + * This is useful for regression tests, but not much more. + */ +Datum +pg_stat_exists_stat(PG_FUNCTION_ARGS) +{ + char *stats_type = text_to_cstring(PG_GETARG_TEXT_P(0)); + Oid dboid = PG_GETARG_OID(1); + Oid objoid = PG_GETARG_OID(2); + PgStat_Kind kind = pgstat_kind_from_str(stats_type); + + PG_RETURN_BOOL(pgstat_exists_entry(kind, dboid, objoid)); +} -- 2.35.1.677.gabf474a5dd --vl7on5vfmrsyxmos Content-Type: text/x-diff; charset=us-ascii Content-Disposition: attachment; filename="v70-0018-pgstat-test-transaction-behaviour-2PC-function-s.patch" ^ permalink raw reply [nested|flat] 4+ messages in thread
* [PATCH v8 5/7] Row pattern recognition patch (docs). @ 2023-09-25 05:01 Tatsuo Ishii <ishii@postgresql.org> 0 siblings, 0 replies; 4+ messages in thread From: Tatsuo Ishii @ 2023-09-25 05:01 UTC (permalink / raw) --- doc/src/sgml/advanced.sgml | 52 ++++++++++++++++++++++++++++++++++ doc/src/sgml/func.sgml | 54 ++++++++++++++++++++++++++++++++++++ doc/src/sgml/ref/select.sgml | 38 +++++++++++++++++++++++-- 3 files changed, 142 insertions(+), 2 deletions(-) diff --git a/doc/src/sgml/advanced.sgml b/doc/src/sgml/advanced.sgml index 755c9f1485..f39ec8f2d5 100644 --- a/doc/src/sgml/advanced.sgml +++ b/doc/src/sgml/advanced.sgml @@ -537,6 +537,58 @@ WHERE pos < 3; <literal>rank</literal> less than 3. </para> + <para> + Row pattern common syntax can be used with row pattern common syntax to + perform row pattern recognition in a query. Row pattern common syntax + includes two sub clauses. <literal>DEFINE</literal> defines definition + variables along with an expression. The expression must be a logical + expression, which means it must + return <literal>TRUE</literal>, <literal>FALSE</literal> + or <literal>NULL</literal>. Moreover if the expression comprises a column + reference, it must be the argument of <function>rpr</function>. An example + of <literal>DEFINE</literal> is as follows. + +<programlisting> +DEFINE + LOWPRICE AS price <= 100, + UP AS price > PREV(price), + DOWN AS price < PREV(price) +</programlisting> + + Note that <function>PREV</function> returns price column in the previous + row if it's called in a context of row pattern recognition. So in the + second line means the definition variable "UP" is <literal>TRUE</literal> + when price column in the current row is greater than the price column in + the previous row. Likewise, "DOWN" is <literal>TRUE</literal> when when + price column in the current row is lower than the price column in the + previous row. + </para> + <para> + Once <literal>DEFINE</literal> exists, <literal>PATTERN</literal> can be + used. <literal>PATTERN</literal> defines a sequence of rows that satisfies + certain conditions. For example following <literal>PATTERN</literal> + defines that a row starts with the condition "LOWPRICE", then one or more + rows satisfy "UP" and finally one or more rows satisfy "DOWN". If a + sequence of rows found, rpr returns the column at the starting row. + Example of a <literal>SELECT</literal> using the <literal>DEFINE</literal> + and <literal>PATTERN</literal> clause is as follows. + +<programlisting> +SELECT company, tdate, price, max(price) OVER w FROM stock + WINDOW w AS ( + PARTITION BY company + ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING + AFTER MATCH SKIP PAST LAST ROW + INITIAL + PATTERN (LOWPRICE UP+ DOWN+) + DEFINE + LOWPRICE AS price <= 100, + UP AS price > PREV(price), + DOWN AS price < PREV(price) +); +</programlisting> + </para> + <para> When a query involves multiple window functions, it is possible to write out each one with a separate <literal>OVER</literal> clause, but this is diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml index 24ad87f910..9c99dda4ae 100644 --- a/doc/src/sgml/func.sgml +++ b/doc/src/sgml/func.sgml @@ -21780,6 +21780,7 @@ SELECT count(*) FROM sometable; returns <literal>NULL</literal> if there is no such row. </para></entry> </row> + </tbody> </tgroup> </table> @@ -21819,6 +21820,59 @@ SELECT count(*) FROM sometable; Other frame specifications can be used to obtain other effects. </para> + <para> + Row pattern recognition navigation functions are listed in + <xref linkend="functions-rpr-navigation-table"/>. These functions + can be used to describe DEFINE clause of Row pattern recognition. + </para> + + <table id="functions-rpr-navigation-table"> + <title>Row Pattern Navigation Functions</title> + <tgroup cols="1"> + <thead> + <row> + <entry role="func_table_entry"><para role="func_signature"> + Function + </para> + <para> + Description + </para></entry> + </row> + </thead> + + <tbody> + <row> + <entry role="func_table_entry"><para role="func_signature"> + <indexterm> + <primary>prev</primary> + </indexterm> + <function>prev</function> ( <parameter>value</parameter> <type>anyelement</type> ) + <returnvalue>anyelement</returnvalue> + </para> + <para> + Returns the column value at the previous row; + returns NULL if there is no previous row in the window frame. + </para></entry> + </row> + + <row> + <entry role="func_table_entry"><para role="func_signature"> + <indexterm> + <primary>next</primary> + </indexterm> + <function>next</function> ( <parameter>value</parameter> <type>anyelement</type> ) + <returnvalue>anyelement</returnvalue> + </para> + <para> + Returns the column value at the next row; + returns NULL if there is no next row in the window frame. + </para></entry> + </row> + + </tbody> + </tgroup> + </table> + <note> <para> The SQL standard defines a <literal>RESPECT NULLS</literal> or diff --git a/doc/src/sgml/ref/select.sgml b/doc/src/sgml/ref/select.sgml index 0ee0cc7e64..056768b330 100644 --- a/doc/src/sgml/ref/select.sgml +++ b/doc/src/sgml/ref/select.sgml @@ -966,8 +966,8 @@ WINDOW <replaceable class="parameter">window_name</replaceable> AS ( <replaceabl The <replaceable class="parameter">frame_clause</replaceable> can be one of <synopsis> -{ RANGE | ROWS | GROUPS } <replaceable>frame_start</replaceable> [ <replaceable>frame_exclusion</replaceable> ] -{ RANGE | ROWS | GROUPS } BETWEEN <replaceable>frame_start</replaceable> AND <replaceable>frame_end</replaceable> [ <replaceable>frame_exclusion</replaceable> ] +{ RANGE | ROWS | GROUPS } <replaceable>frame_start</replaceable> [ <replaceable>frame_exclusion</replaceable> ] [row_pattern_common_syntax] +{ RANGE | ROWS | GROUPS } BETWEEN <replaceable>frame_start</replaceable> AND <replaceable>frame_end</replaceable> [ <replaceable>frame_exclusion</replaceable> ] [row_pattern_common_syntax] </synopsis> where <replaceable>frame_start</replaceable> @@ -1074,6 +1074,40 @@ EXCLUDE NO OTHERS a given peer group will be in the frame or excluded from it. </para> + <para> + The + optional <replaceable class="parameter">row_pattern_common_syntax</replaceable> + defines the <firstterm>row pattern recognition condition</firstterm> for + this + window. <replaceable class="parameter">row_pattern_common_syntax</replaceable> + includes following subclauses. <literal>AFTER MATCH SKIP PAST LAST + ROW</literal> or <literal>AFTER MATCH SKIP TO NEXT ROW</literal> controls + how to proceed to next row position after a match + found. With <literal>AFTER MATCH SKIP PAST LAST ROW</literal> (the + default) next row position is next to the last row of previous match. On + the other hand, with <literal>AFTER MATCH SKIP TO NEXT ROW</literal> next + row position is always next to the last row of previous + match. <literal>DEFINE</literal> defines definition variables along with a + boolean expression. <literal>PATTERN</literal> defines a sequence of rows + that satisfies certain conditions using variables defined + in <literal>DEFINE</literal> clause. If the variable is not defined in + the <literal>DEFINE</literal> clause, it is implicitly assumed + following is defined in the <literal>DEFINE</literal> clause. + +<synopsis> +<literal>variable_name</literal> AS TRUE +</synopsis> + + Note that the maximu number of variables defined + in <literal>DEFINE</literal> clause is 26. + +<synopsis> +[ AFTER MATCH SKIP PAST LAST ROW | AFTER MATCH SKIP TO NEXT ROW ] +PATTERN <replaceable class="parameter">pattern_variable_name</replaceable>[+] [, ...] +DEFINE <replaceable class="parameter">definition_varible_name</replaceable> AS <replaceable class="parameter">expression</replaceable> [, ...] +</synopsis> + </para> + <para> The purpose of a <literal>WINDOW</literal> clause is to specify the behavior of <firstterm>window functions</firstterm> appearing in the query's -- 2.25.1 ----Next_Part(Mon_Sep_25_14_26_30_2023_752)-- Content-Type: Text/X-Patch; charset=us-ascii Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="v8-0006-Row-pattern-recognition-patch-tests.patch" ^ permalink raw reply [nested|flat] 4+ messages in thread
end of thread, other threads:[~2023-09-25 05:01 UTC | newest] Thread overview: 4+ messages (download: mbox mbox.gz follow: Atom feed) -- links below jump to the message on this page -- 2022-04-02 21:21 [PATCH v68 16/31] pgstat: add pg_stat_exists_stat() for easier testing. Andres Freund <andres@anarazel.de> 2022-04-02 21:21 [PATCH v69 13/28] pgstat: add pg_stat_exists_stat() for easier testing. Andres Freund <andres@anarazel.de> 2022-04-02 21:21 [PATCH v70 17/27] pgstat: add pg_stat_exists_stat() for easier testing. Andres Freund <andres@anarazel.de> 2023-09-25 05:01 [PATCH v8 5/7] Row pattern recognition patch (docs). Tatsuo Ishii <ishii@postgresql.org>
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