On Wed, Feb 18, 2026 at 10:56:56PM +0100, Andreas Karlsson wrote: > On 1/30/26 1:15 AM, Mark Wong wrote: > > > Thanks for the patch. After reviewing it, I have mixed feelings. From one > > > side, it removes some redundant code, which is good. In the other side, I > > > doubt if we should delete proc entries from pg_proc.c? Say, there is a > > > view that uses a proc to be deleted, the proc OID is stored with the > > > view, then after an upgrade, the view would be broken. From this > > > perspective, should we retain the old proc entries and only point them to > > > the new functions? > > > > I don't have a solution for the case of a view storing the OID, but Álvaro > > Herrera suggested to me to at least try preventing those OIDs from being > > reused. > > > > I've attached a v3 patch set that introduces > > src/include/catalog/pg_retired.dat > > to store previously used OIDs and procedure names that the scripts > > unused_oids > > and renumber_oids.pl can consume to prevent the reuse of retired OIDs. > > > > Maybe that can also be used towards finding that particular solution... > I am not sure what can be done, breaking people's databases on pg_upgrade is > certainly not nice and detecting that function oid has been used anywhere in > a database sounds painful, especially since there are no references to > system oids in pg_depend, right? > > That said this patch should be updated to use the new support for default > values in BKI files.[1] > > https://git.postgresql.org/cgit/postgresql.git/commit/?id=759b03b24ce96f0ba6d734b570d1a6f4a0fb1177
I have attached a new set of patches. v4 is now using the new support for default values. Summary of additional changes: * I've removed the retired OID tracking, but can certainly add that back if we decide it will be useful * Caught a bug where I wasn't using BoolGetDatum() with DirectFunctionCall3 with pg_get_expr() Regards, Mark -- Mark Wong <[email protected]> EDB https://enterprisedb.com
>From fdca206df20d4586f209cbb108761532f0b2935a Mon Sep 17 00:00:00 2001 From: Mark Wong <[email protected]> Date: Mon, 8 Dec 2025 15:41:07 -0800 Subject: [PATCH v4 1/6] Handle pg_get_ruledef default args in system_functions.sql Modernize pg_get_ruledef to use proargdefaults for optional pretty argument. --- src/backend/utils/adt/ruleutils.c | 18 ------------------ src/include/catalog/pg_proc.dat | 6 ++---- 2 files changed, 2 insertions(+), 22 deletions(-) diff --git a/src/backend/utils/adt/ruleutils.c b/src/backend/utils/adt/ruleutils.c index f16f1535785..31e773fb32e 100644 --- a/src/backend/utils/adt/ruleutils.c +++ b/src/backend/utils/adt/ruleutils.c @@ -559,24 +559,6 @@ static void get_json_table_nested_columns(TableFunc *tf, JsonTablePlan *plan, */ Datum pg_get_ruledef(PG_FUNCTION_ARGS) -{ - Oid ruleoid = PG_GETARG_OID(0); - int prettyFlags; - char *res; - - prettyFlags = PRETTYFLAG_INDENT; - - res = pg_get_ruledef_worker(ruleoid, prettyFlags); - - if (res == NULL) - PG_RETURN_NULL(); - - PG_RETURN_TEXT_P(string_to_text(res)); -} - - -Datum -pg_get_ruledef_ext(PG_FUNCTION_ARGS) { Oid ruleoid = PG_GETARG_OID(0); bool pretty = PG_GETARG_BOOL(1); diff --git a/src/include/catalog/pg_proc.dat b/src/include/catalog/pg_proc.dat index dac40992cbc..b935b6f14c0 100644 --- a/src/include/catalog/pg_proc.dat +++ b/src/include/catalog/pg_proc.dat @@ -3962,9 +3962,6 @@ proargtypes => 'oid oid', prosrc => 'oidge' }, # System-view support functions -{ oid => '1573', descr => 'source text of a rule', - proname => 'pg_get_ruledef', provolatile => 's', prorettype => 'text', - proargtypes => 'oid', prosrc => 'pg_get_ruledef' }, { oid => '1640', descr => 'select statement of a view', proname => 'pg_get_viewdef', provolatile => 's', proparallel => 'r', prorettype => 'text', proargtypes => 'text', @@ -8516,7 +8513,8 @@ # System-view support functions with pretty-print option { oid => '2504', descr => 'source text of a rule with pretty-print option', proname => 'pg_get_ruledef', provolatile => 's', prorettype => 'text', - proargtypes => 'oid bool', prosrc => 'pg_get_ruledef_ext' }, + proargtypes => 'oid bool', proargnames => '{rule,pretty}', + proargdefaults => '{false}',prosrc => 'pg_get_ruledef' }, { oid => '2505', descr => 'select statement of a view with pretty-print option', proname => 'pg_get_viewdef', provolatile => 's', proparallel => 'r', -- 2.43.0
>From 13ce84d431a34a78d9715b299d8f9b33b8861290 Mon Sep 17 00:00:00 2001 From: Mark Wong <[email protected]> Date: Tue, 9 Dec 2025 09:33:21 -0800 Subject: [PATCH v4 2/6] Handle pg_get_viewdef default args in system_functions.sql Modernize pg_get_viewdef to use proargdefaults to handle the optional pretty argument for both versions that use OID or view name. --- src/backend/utils/adt/ruleutils.c | 44 ------------------------------- src/include/catalog/pg_proc.dat | 13 +++------ 2 files changed, 4 insertions(+), 53 deletions(-) diff --git a/src/backend/utils/adt/ruleutils.c b/src/backend/utils/adt/ruleutils.c index 31e773fb32e..328f994547e 100644 --- a/src/backend/utils/adt/ruleutils.c +++ b/src/backend/utils/adt/ruleutils.c @@ -659,25 +659,6 @@ pg_get_ruledef_worker(Oid ruleoid, int prettyFlags) */ Datum pg_get_viewdef(PG_FUNCTION_ARGS) -{ - /* By OID */ - Oid viewoid = PG_GETARG_OID(0); - int prettyFlags; - char *res; - - prettyFlags = PRETTYFLAG_INDENT; - - res = pg_get_viewdef_worker(viewoid, prettyFlags, WRAP_COLUMN_DEFAULT); - - if (res == NULL) - PG_RETURN_NULL(); - - PG_RETURN_TEXT_P(string_to_text(res)); -} - - -Datum -pg_get_viewdef_ext(PG_FUNCTION_ARGS) { /* By OID */ Oid viewoid = PG_GETARG_OID(0); @@ -717,31 +698,6 @@ pg_get_viewdef_wrap(PG_FUNCTION_ARGS) Datum pg_get_viewdef_name(PG_FUNCTION_ARGS) -{ - /* By qualified name */ - text *viewname = PG_GETARG_TEXT_PP(0); - int prettyFlags; - RangeVar *viewrel; - Oid viewoid; - char *res; - - prettyFlags = PRETTYFLAG_INDENT; - - /* Look up view name. Can't lock it - we might not have privileges. */ - viewrel = makeRangeVarFromNameList(textToQualifiedNameList(viewname)); - viewoid = RangeVarGetRelid(viewrel, NoLock, false); - - res = pg_get_viewdef_worker(viewoid, prettyFlags, WRAP_COLUMN_DEFAULT); - - if (res == NULL) - PG_RETURN_NULL(); - - PG_RETURN_TEXT_P(string_to_text(res)); -} - - -Datum -pg_get_viewdef_name_ext(PG_FUNCTION_ARGS) { /* By qualified name */ text *viewname = PG_GETARG_TEXT_PP(0); diff --git a/src/include/catalog/pg_proc.dat b/src/include/catalog/pg_proc.dat index b935b6f14c0..166ae4b5645 100644 --- a/src/include/catalog/pg_proc.dat +++ b/src/include/catalog/pg_proc.dat @@ -3962,13 +3962,6 @@ proargtypes => 'oid oid', prosrc => 'oidge' }, # System-view support functions -{ oid => '1640', descr => 'select statement of a view', - proname => 'pg_get_viewdef', provolatile => 's', proparallel => 'r', - prorettype => 'text', proargtypes => 'text', - prosrc => 'pg_get_viewdef_name' }, -{ oid => '1641', descr => 'select statement of a view', - proname => 'pg_get_viewdef', provolatile => 's', proparallel => 'r', - prorettype => 'text', proargtypes => 'oid', prosrc => 'pg_get_viewdef' }, { oid => '1642', descr => 'role name by OID (with fallback)', proname => 'pg_get_userbyid', provolatile => 's', prorettype => 'name', proargtypes => 'oid', prosrc => 'pg_get_userbyid' }, @@ -8519,12 +8512,14 @@ descr => 'select statement of a view with pretty-print option', proname => 'pg_get_viewdef', provolatile => 's', proparallel => 'r', prorettype => 'text', proargtypes => 'text bool', - prosrc => 'pg_get_viewdef_name_ext' }, + proargnames => '{view,pretty}', proargdefaults => '{false}', + prosrc => 'pg_get_viewdef_name' }, { oid => '2506', descr => 'select statement of a view with pretty-print option', proname => 'pg_get_viewdef', provolatile => 's', proparallel => 'r', prorettype => 'text', proargtypes => 'oid bool', - prosrc => 'pg_get_viewdef_ext' }, + proargnames => '{view,pretty}', proargdefaults => '{false}', + prosrc => 'pg_get_viewdef' }, { oid => '3159', descr => 'select statement of a view with pretty-printing and specified line wrapping', proname => 'pg_get_viewdef', provolatile => 's', proparallel => 'r', -- 2.43.0
>From e4f7ae2de2a1e0cc131dc35ecf416832e27c6b20 Mon Sep 17 00:00:00 2001 From: Mark Wong <[email protected]> Date: Tue, 9 Dec 2025 10:02:15 -0800 Subject: [PATCH v4 3/6] Handle pg_get_indexdef default args in system_functions.sql Modernize pg_get_indexdef to use proargdefaults to handle the optional column and pretty argument. --- src/backend/utils/adt/ruleutils.c | 20 -------------------- src/include/catalog/pg_proc.dat | 6 ++---- 2 files changed, 2 insertions(+), 24 deletions(-) diff --git a/src/backend/utils/adt/ruleutils.c b/src/backend/utils/adt/ruleutils.c index 328f994547e..b40158d30bb 100644 --- a/src/backend/utils/adt/ruleutils.c +++ b/src/backend/utils/adt/ruleutils.c @@ -1115,26 +1115,6 @@ pg_get_triggerdef_worker(Oid trigid, bool pretty) */ Datum pg_get_indexdef(PG_FUNCTION_ARGS) -{ - Oid indexrelid = PG_GETARG_OID(0); - int prettyFlags; - char *res; - - prettyFlags = PRETTYFLAG_INDENT; - - res = pg_get_indexdef_worker(indexrelid, 0, NULL, - false, false, - false, false, - prettyFlags, true); - - if (res == NULL) - PG_RETURN_NULL(); - - PG_RETURN_TEXT_P(string_to_text(res)); -} - -Datum -pg_get_indexdef_ext(PG_FUNCTION_ARGS) { Oid indexrelid = PG_GETARG_OID(0); int32 colno = PG_GETARG_INT32(1); diff --git a/src/include/catalog/pg_proc.dat b/src/include/catalog/pg_proc.dat index 166ae4b5645..7e45cbcb93d 100644 --- a/src/include/catalog/pg_proc.dat +++ b/src/include/catalog/pg_proc.dat @@ -3965,9 +3965,6 @@ { oid => '1642', descr => 'role name by OID (with fallback)', proname => 'pg_get_userbyid', provolatile => 's', prorettype => 'name', proargtypes => 'oid', prosrc => 'pg_get_userbyid' }, -{ oid => '1643', descr => 'index description', - proname => 'pg_get_indexdef', provolatile => 's', prorettype => 'text', - proargtypes => 'oid', prosrc => 'pg_get_indexdef' }, { oid => '3415', descr => 'extended statistics object description', proname => 'pg_get_statisticsobjdef', provolatile => 's', prorettype => 'text', proargtypes => 'oid', @@ -8528,7 +8525,8 @@ { oid => '2507', descr => 'index description (full create statement or single expression) with pretty-print option', proname => 'pg_get_indexdef', provolatile => 's', prorettype => 'text', - proargtypes => 'oid int4 bool', prosrc => 'pg_get_indexdef_ext' }, + proargtypes => 'oid int4 bool', proargnames => '{index,column,pretty}', + proargdefaults => '{0,false}', prosrc => 'pg_get_indexdef' }, { oid => '2508', descr => 'constraint description with pretty-print option', proname => 'pg_get_constraintdef', provolatile => 's', prorettype => 'text', proargtypes => 'oid bool', prosrc => 'pg_get_constraintdef_ext' }, -- 2.43.0
>From 07eac504026eb72bc16afe72bdcee00e3d1d5b26 Mon Sep 17 00:00:00 2001 From: Mark Wong <[email protected]> Date: Tue, 9 Dec 2025 10:59:41 -0800 Subject: [PATCH v4 4/6] Handle pg_get_constraintdef default args in system_functions.sql Modernize pg_get_constraintdef to use proargdefaults to handle the optional pretty argument. --- src/backend/utils/adt/ruleutils.c | 17 ----------------- src/include/catalog/pg_proc.dat | 6 ++---- 2 files changed, 2 insertions(+), 21 deletions(-) diff --git a/src/backend/utils/adt/ruleutils.c b/src/backend/utils/adt/ruleutils.c index b40158d30bb..03550f0d80b 100644 --- a/src/backend/utils/adt/ruleutils.c +++ b/src/backend/utils/adt/ruleutils.c @@ -2062,23 +2062,6 @@ pg_get_partconstrdef_string(Oid partitionId, char *aliasname) */ Datum pg_get_constraintdef(PG_FUNCTION_ARGS) -{ - Oid constraintId = PG_GETARG_OID(0); - int prettyFlags; - char *res; - - prettyFlags = PRETTYFLAG_INDENT; - - res = pg_get_constraintdef_worker(constraintId, false, prettyFlags, true); - - if (res == NULL) - PG_RETURN_NULL(); - - PG_RETURN_TEXT_P(string_to_text(res)); -} - -Datum -pg_get_constraintdef_ext(PG_FUNCTION_ARGS) { Oid constraintId = PG_GETARG_OID(0); bool pretty = PG_GETARG_BOOL(1); diff --git a/src/include/catalog/pg_proc.dat b/src/include/catalog/pg_proc.dat index 7e45cbcb93d..1d1b24a8f4c 100644 --- a/src/include/catalog/pg_proc.dat +++ b/src/include/catalog/pg_proc.dat @@ -3987,9 +3987,6 @@ { oid => '1662', descr => 'trigger description', proname => 'pg_get_triggerdef', provolatile => 's', prorettype => 'text', proargtypes => 'oid', prosrc => 'pg_get_triggerdef' }, -{ oid => '1387', descr => 'constraint description', - proname => 'pg_get_constraintdef', provolatile => 's', prorettype => 'text', - proargtypes => 'oid', prosrc => 'pg_get_constraintdef' }, { oid => '1716', descr => 'deparse an encoded expression', proname => 'pg_get_expr', provolatile => 's', prorettype => 'text', proargtypes => 'pg_node_tree oid', prosrc => 'pg_get_expr' }, @@ -8529,7 +8526,8 @@ proargdefaults => '{0,false}', prosrc => 'pg_get_indexdef' }, { oid => '2508', descr => 'constraint description with pretty-print option', proname => 'pg_get_constraintdef', provolatile => 's', prorettype => 'text', - proargtypes => 'oid bool', prosrc => 'pg_get_constraintdef_ext' }, + proargtypes => 'oid bool', proargnames => '{constraint,pretty}', + proargdefaults => '{false}', prosrc => 'pg_get_constraintdef' }, { oid => '2509', descr => 'deparse an encoded expression with pretty-print option', proname => 'pg_get_expr', provolatile => 's', prorettype => 'text', -- 2.43.0
>From 49c9382e0ab6a18b687e7fb391b837b8ab33c360 Mon Sep 17 00:00:00 2001 From: Mark Wong <[email protected]> Date: Tue, 9 Dec 2025 11:17:56 -0800 Subject: [PATCH v4 5/6] Handle pg_get_expr default args in system_functions.sql Modernize pg_get_expr to use proargdefaults to handle the optional pretty argument. That also means any direct function calls now needs to set the pretty parameter. --- src/backend/commands/tablecmds.c | 5 +++-- src/backend/utils/adt/ruleutils.c | 17 ----------------- src/include/catalog/pg_proc.dat | 7 +++---- 3 files changed, 6 insertions(+), 23 deletions(-) diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c index b04b0dbd2a0..a523a512949 100644 --- a/src/backend/commands/tablecmds.c +++ b/src/backend/commands/tablecmds.c @@ -17477,8 +17477,9 @@ decompile_conbin(HeapTuple contup, TupleDesc tupdesc) if (isnull) elog(ERROR, "null conbin for constraint %u", con->oid); - expr = DirectFunctionCall2(pg_get_expr, attr, - ObjectIdGetDatum(con->conrelid)); + expr = DirectFunctionCall3(pg_get_expr, attr, + ObjectIdGetDatum(con->conrelid), + BoolGetDatum(false)); return TextDatumGetCString(expr); } diff --git a/src/backend/utils/adt/ruleutils.c b/src/backend/utils/adt/ruleutils.c index 03550f0d80b..a70807e84ca 100644 --- a/src/backend/utils/adt/ruleutils.c +++ b/src/backend/utils/adt/ruleutils.c @@ -2574,23 +2574,6 @@ decompile_column_index_array(Datum column_index_array, Oid relId, */ Datum pg_get_expr(PG_FUNCTION_ARGS) -{ - text *expr = PG_GETARG_TEXT_PP(0); - Oid relid = PG_GETARG_OID(1); - text *result; - int prettyFlags; - - prettyFlags = PRETTYFLAG_INDENT; - - result = pg_get_expr_worker(expr, relid, prettyFlags); - if (result) - PG_RETURN_TEXT_P(result); - else - PG_RETURN_NULL(); -} - -Datum -pg_get_expr_ext(PG_FUNCTION_ARGS) { text *expr = PG_GETARG_TEXT_PP(0); Oid relid = PG_GETARG_OID(1); diff --git a/src/include/catalog/pg_proc.dat b/src/include/catalog/pg_proc.dat index 1d1b24a8f4c..69c1e5bb264 100644 --- a/src/include/catalog/pg_proc.dat +++ b/src/include/catalog/pg_proc.dat @@ -3987,9 +3987,6 @@ { oid => '1662', descr => 'trigger description', proname => 'pg_get_triggerdef', provolatile => 's', prorettype => 'text', proargtypes => 'oid', prosrc => 'pg_get_triggerdef' }, -{ oid => '1716', descr => 'deparse an encoded expression', - proname => 'pg_get_expr', provolatile => 's', prorettype => 'text', - proargtypes => 'pg_node_tree oid', prosrc => 'pg_get_expr' }, { oid => '1665', descr => 'name of sequence for a serial column', proname => 'pg_get_serial_sequence', provolatile => 's', prorettype => 'text', proargtypes => 'text text', prosrc => 'pg_get_serial_sequence' }, @@ -8531,7 +8528,9 @@ { oid => '2509', descr => 'deparse an encoded expression with pretty-print option', proname => 'pg_get_expr', provolatile => 's', prorettype => 'text', - proargtypes => 'pg_node_tree oid bool', prosrc => 'pg_get_expr_ext' }, + proargtypes => 'pg_node_tree oid bool', + proargnames => '{expr,relation,pretty}', proargdefaults => '{false}', + prosrc => 'pg_get_expr' }, { oid => '2510', descr => 'get the prepared statements for this session', proname => 'pg_prepared_statement', prorows => '1000', proretset => 't', provolatile => 's', proparallel => 'r', prorettype => 'record', -- 2.43.0
>From 8d48c5a3935efb8e50b5b8d51a240336e124e5d1 Mon Sep 17 00:00:00 2001 From: Mark Wong <[email protected]> Date: Tue, 9 Dec 2025 11:51:39 -0800 Subject: [PATCH v4 6/6] Handle pg_get_triggerdef default args in system_functions.sql Modernize pg_get_triggerdef to use proargdefaults to handle the optional pretty argument. --- src/backend/utils/adt/ruleutils.c | 14 -------------- src/include/catalog/pg_proc.dat | 6 ++---- 2 files changed, 2 insertions(+), 18 deletions(-) diff --git a/src/backend/utils/adt/ruleutils.c b/src/backend/utils/adt/ruleutils.c index a70807e84ca..27be4501e12 100644 --- a/src/backend/utils/adt/ruleutils.c +++ b/src/backend/utils/adt/ruleutils.c @@ -808,20 +808,6 @@ pg_get_viewdef_worker(Oid viewoid, int prettyFlags, int wrapColumn) */ Datum pg_get_triggerdef(PG_FUNCTION_ARGS) -{ - Oid trigid = PG_GETARG_OID(0); - char *res; - - res = pg_get_triggerdef_worker(trigid, false); - - if (res == NULL) - PG_RETURN_NULL(); - - PG_RETURN_TEXT_P(string_to_text(res)); -} - -Datum -pg_get_triggerdef_ext(PG_FUNCTION_ARGS) { Oid trigid = PG_GETARG_OID(0); bool pretty = PG_GETARG_BOOL(1); diff --git a/src/include/catalog/pg_proc.dat b/src/include/catalog/pg_proc.dat index 69c1e5bb264..b43cbb62b82 100644 --- a/src/include/catalog/pg_proc.dat +++ b/src/include/catalog/pg_proc.dat @@ -3984,9 +3984,6 @@ proname => 'pg_get_partition_constraintdef', provolatile => 's', prorettype => 'text', proargtypes => 'oid', prosrc => 'pg_get_partition_constraintdef' }, -{ oid => '1662', descr => 'trigger description', - proname => 'pg_get_triggerdef', provolatile => 's', prorettype => 'text', - proargtypes => 'oid', prosrc => 'pg_get_triggerdef' }, { oid => '1665', descr => 'name of sequence for a serial column', proname => 'pg_get_serial_sequence', provolatile => 's', prorettype => 'text', proargtypes => 'text text', prosrc => 'pg_get_serial_sequence' }, @@ -8566,7 +8563,8 @@ prosrc => 'pg_timezone_names' }, { oid => '2730', descr => 'trigger description with pretty-print option', proname => 'pg_get_triggerdef', provolatile => 's', prorettype => 'text', - proargtypes => 'oid bool', prosrc => 'pg_get_triggerdef_ext' }, + proargtypes => 'oid bool', proargnames => '{trigger,pretty}', + proargdefaults => '{false}', prosrc => 'pg_get_triggerdef' }, # asynchronous notifications { oid => '3035', -- 2.43.0
