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Add pg_depend.refobjversion.

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Provide a place for the version of referenced database objects to be
recorded.  A follow-up commit will use this to record dependencies on
collation versions for indexes, but similar ideas for other kinds of
objects have also been mooted.

Author: Thomas Munro <thomas.munro@gmail.com>
Reviewed-by: Julien Rouhaud <rjuju123@gmail.com>
Reviewed-by: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Discussion: https://postgr.es/m/CAEepm%3D0uEQCpfq_%2BLYFBdArCe4Ot98t1aR4eYiYTe%3DyavQygiQ%40mail.gmail.com
This commit is contained in:
Thomas Munro
2020-11-02 19:40:49 +13:00
parent 7d1297df08
commit cd6f479e79
8 changed files with 40 additions and 11 deletions
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14
src/backend/catalog/pg_depend.c
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@@ -24,6 +24,7 @@
#include "catalog/pg_extension.h"
#include "commands/extension.h"
#include "miscadmin.h"
#include "utils/builtins.h"
#include "utils/fmgroids.h"
#include "utils/lsyscache.h"
#include "utils/rel.h"
@@ -44,7 +45,7 @@ recordDependencyOn(const ObjectAddress *depender,
const ObjectAddress *referenced,
DependencyType behavior)
{
recordMultipleDependencies(depender, referenced, 1, behavior);
recordMultipleDependencies(depender, referenced, 1, NULL, behavior);
}
/*
@@ -55,6 +56,7 @@ void
recordMultipleDependencies(const ObjectAddress *depender,
const ObjectAddress *referenced,
int nreferenced,
const char *version,
DependencyType behavior)
{
Relation dependDesc;
@@ -115,6 +117,9 @@ recordMultipleDependencies(const ObjectAddress *depender,
* Record the dependency. Note we don't bother to check for duplicate
* dependencies; there's no harm in them.
*/
memset(slot[slot_stored_count]->tts_isnull, false,
slot[slot_stored_count]->tts_tupleDescriptor->natts * sizeof(bool));
slot[slot_stored_count]->tts_values[Anum_pg_depend_refclassid - 1] = ObjectIdGetDatum(referenced->classId);
slot[slot_stored_count]->tts_values[Anum_pg_depend_refobjid - 1] = ObjectIdGetDatum(referenced->objectId);
slot[slot_stored_count]->tts_values[Anum_pg_depend_refobjsubid - 1] = Int32GetDatum(referenced->objectSubId);
@@ -122,9 +127,10 @@ recordMultipleDependencies(const ObjectAddress *depender,
slot[slot_stored_count]->tts_values[Anum_pg_depend_classid - 1] = ObjectIdGetDatum(depender->classId);
slot[slot_stored_count]->tts_values[Anum_pg_depend_objid - 1] = ObjectIdGetDatum(depender->objectId);
slot[slot_stored_count]->tts_values[Anum_pg_depend_objsubid - 1] = Int32GetDatum(depender->objectSubId);
memset(slot[slot_stored_count]->tts_isnull, false,
slot[slot_stored_count]->tts_tupleDescriptor->natts * sizeof(bool));
if (version)
slot[slot_stored_count]->tts_values[Anum_pg_depend_refobjversion - 1] = CStringGetTextDatum(version);
else
slot[slot_stored_count]->tts_isnull[Anum_pg_depend_refobjversion - 1] = true;
ExecStoreVirtualTuple(slot[slot_stored_count]);
slot_stored_count++;