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Revert "Introduce CompactAttribute array in TupleDesc"

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This reverts commit d28dff3f6c.

Quite a large number of buildfarm members didn't like this commit and
it's not yet clear why.  Reverting this before too many animals turn
red.

Discussion: https://postgr.es/m/CAApHDvr9i6T5=iAwQCxFDgMsthr_obVxgwBaEJkC8KUH6yM3Hw@mail.gmail.com
This commit is contained in:
David Rowley
2024-12-03 17:12:38 +13:00
parent d28dff3f6c
commit 4171c44c9b
14 changed files with 68 additions and 246 deletions
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21
src/backend/utils/cache/relcache.c vendored
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@@ -585,8 +585,6 @@ RelationBuildTupleDesc(Relation relation)
attp,
ATTRIBUTE_FIXED_PART_SIZE);
populate_compact_attribute(relation->rd_att, attnum - 1);
/* Update constraint/default info */
if (attp->attnotnull)
constr->has_not_null = true;
@@ -676,12 +674,12 @@ RelationBuildTupleDesc(Relation relation)
#endif
/*
* We can easily set the attcacheoff value for the first attribute: it
* must be zero. This eliminates the need for special cases for attnum=1
* that used to exist in fastgetattr() and index_getattr().
* However, we can easily set the attcacheoff value for the first
* attribute: it must be zero. This eliminates the need for special cases
* for attnum=1 that used to exist in fastgetattr() and index_getattr().
*/
if (RelationGetNumberOfAttributes(relation) > 0)
TupleDescCompactAttr(relation->rd_att, 0)->attcacheoff = 0;
TupleDescAttr(relation->rd_att, 0)->attcacheoff = 0;
/*
* Set up constraint/default info
@@ -1967,12 +1965,10 @@ formrdesc(const char *relationName, Oid relationReltype,
has_not_null |= attrs[i].attnotnull;
/* make sure attcacheoff is valid */
TupleDescAttr(relation->rd_att, i)->attcacheoff = -1;
populate_compact_attribute(relation->rd_att, i);
}
/* initialize first attribute's attcacheoff, cf RelationBuildTupleDesc */
TupleDescCompactAttr(relation->rd_att, 0)->attcacheoff = 0;
TupleDescAttr(relation->rd_att, 0)->attcacheoff = 0;
/* mark not-null status */
if (has_not_null)
@@ -3583,7 +3579,6 @@ RelationBuildLocalRelation(const char *relname,
datt->attgenerated = satt->attgenerated;
datt->attnotnull = satt->attnotnull;
has_not_null |= satt->attnotnull;
populate_compact_attribute(rel->rd_att, i);
}
if (has_not_null)
@@ -4404,12 +4399,10 @@ BuildHardcodedDescriptor(int natts, const FormData_pg_attribute *attrs)
memcpy(TupleDescAttr(result, i), &attrs[i], ATTRIBUTE_FIXED_PART_SIZE);
/* make sure attcacheoff is valid */
TupleDescAttr(result, i)->attcacheoff = -1;
populate_compact_attribute(result, i);
}
/* initialize first attribute's attcacheoff, cf RelationBuildTupleDesc */
TupleDescCompactAttr(result, 0)->attcacheoff = 0;
TupleDescAttr(result, 0)->attcacheoff = 0;
/* Note: we don't bother to set up a TupleConstr entry */
@@ -6173,8 +6166,6 @@ load_relcache_init_file(bool shared)
goto read_failed;
has_not_null |= attr->attnotnull;
populate_compact_attribute(rel->rd_att, i);
}
/* next read the access method specific field */