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ALTER TABLE: rework determination of access method ID

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Avoid setting an access method OID for relation kinds that don't take
one.  Code review for new feature added in 374c7a2290.

Author: Justin Pryzby <pryzby@telsasoft.com>
Reported-by: Alexander Lakhin <exclusion@gmail.com>
Discussion: https://postgr.es/m/e5516ac1-5264-c3c0-d822-9e6f614ea93b@gmail.com
This commit is contained in:
Alvaro Herrera
2024-03-28 16:51:20 +01:00
parent be98a550cc
commit e2395cdbe8
3 changed files with 21 additions and 11 deletions
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26
src/backend/commands/tablecmds.c
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@ -958,22 +958,26 @@ DefineRelation(CreateStmt *stmt, char relkind, Oid ownerId,
}
/*
* Select access method to use: an explicitly indicated one, or (in the
* case of a partitioned table) the parent's, if it has one.
* For relations with table AM and partitioned tables, select access
* method to use: an explicitly indicated one, or (in the case of a
* partitioned table) the parent's, if it has one.
*/
if (stmt->accessMethod != NULL)
accessMethodId = get_table_am_oid(stmt->accessMethod, false);
else if (stmt->partbound)
{
Assert(list_length(inheritOids) == 1);
accessMethodId = get_rel_relam(linitial_oid(inheritOids));
Assert(RELKIND_HAS_TABLE_AM(relkind) || relkind == RELKIND_PARTITIONED_TABLE);
accessMethodId = get_table_am_oid(stmt->accessMethod, false);
}
else
accessMethodId = InvalidOid;
else if (RELKIND_HAS_TABLE_AM(relkind) || relkind == RELKIND_PARTITIONED_TABLE)
{
if (stmt->partbound)
{
Assert(list_length(inheritOids) == 1);
accessMethodId = get_rel_relam(linitial_oid(inheritOids));
}
/* still nothing? use the default */
if (RELKIND_HAS_TABLE_AM(relkind) && !OidIsValid(accessMethodId))
accessMethodId = get_table_am_oid(default_table_access_method, false);
if (RELKIND_HAS_TABLE_AM(relkind) && !OidIsValid(accessMethodId))
accessMethodId = get_table_am_oid(default_table_access_method, false);
}
/*
* Create the relation. Inherited defaults and constraints are passed in