diff options
Diffstat (limited to 'src/backend/commands')
| -rw-r--r-- | src/backend/commands/tablecmds.c | 70 |
1 files changed, 51 insertions, 19 deletions
diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c index 38386fb9cf9..9b0dc3fd10d 100644 --- a/src/backend/commands/tablecmds.c +++ b/src/backend/commands/tablecmds.c @@ -300,7 +300,9 @@ struct DropRelationCallbackState #define child_dependency_type(child_is_partition) \ ((child_is_partition) ? DEPENDENCY_AUTO : DEPENDENCY_NORMAL) -static void truncate_check_rel(Relation rel); +static void truncate_check_rel(Oid relid, Form_pg_class reltuple); +static void truncate_check_perms(Oid relid, Form_pg_class reltuple); +static void truncate_check_activity(Relation rel); static List *MergeAttributes(List *schema, List *supers, char relpersistence, bool is_partition, List **supOids, List **supconstr, int *supOidCount); @@ -1381,7 +1383,11 @@ ExecuteTruncate(TruncateStmt *stmt) heap_close(rel, lockmode); continue; } - truncate_check_rel(rel); + + truncate_check_rel(myrelid, rel->rd_rel); + truncate_check_perms(myrelid, rel->rd_rel); + truncate_check_activity(rel); + rels = lappend(rels, rel); relids = lappend_oid(relids, myrelid); /* Log this relation only if needed for logical decoding */ @@ -1420,7 +1426,15 @@ ExecuteTruncate(TruncateStmt *stmt) continue; } - truncate_check_rel(rel); + /* + * Inherited TRUNCATE commands perform access + * permission checks on the parent table only. + * So we skip checking the children's permissions + * and don't call truncate_check_perms() here. + */ + truncate_check_rel(RelationGetRelid(rel), rel->rd_rel); + truncate_check_activity(rel); + rels = lappend(rels, rel); relids = lappend_oid(relids, childrelid); /* Log this relation only if needed for logical decoding */ @@ -1503,7 +1517,9 @@ ExecuteTruncateGuts(List *explicit_rels, List *relids, List *relids_logged, ereport(NOTICE, (errmsg("truncate cascades to table \"%s\"", RelationGetRelationName(rel)))); - truncate_check_rel(rel); + truncate_check_rel(relid, rel->rd_rel); + truncate_check_perms(relid, rel->rd_rel); + truncate_check_activity(rel); rels = lappend(rels, rel); relids = lappend_oid(relids, relid); /* Log this relation only if needed for logical decoding */ @@ -1759,35 +1775,51 @@ ExecuteTruncateGuts(List *explicit_rels, List *relids, List *relids_logged, * Check that a given rel is safe to truncate. Subroutine for ExecuteTruncate */ static void -truncate_check_rel(Relation rel) +truncate_check_rel(Oid relid, Form_pg_class reltuple) { - AclResult aclresult; + char *relname = NameStr(reltuple->relname); /* * Only allow truncate on regular tables and partitioned tables (although, * the latter are only being included here for the following checks; no * physical truncation will occur in their case.) */ - if (rel->rd_rel->relkind != RELKIND_RELATION && - rel->rd_rel->relkind != RELKIND_PARTITIONED_TABLE) + if (reltuple->relkind != RELKIND_RELATION && + reltuple->relkind != RELKIND_PARTITIONED_TABLE) ereport(ERROR, (errcode(ERRCODE_WRONG_OBJECT_TYPE), - errmsg("\"%s\" is not a table", - RelationGetRelationName(rel)))); - - /* Permissions checks */ - aclresult = pg_class_aclcheck(RelationGetRelid(rel), GetUserId(), - ACL_TRUNCATE); - if (aclresult != ACLCHECK_OK) - aclcheck_error(aclresult, get_relkind_objtype(rel->rd_rel->relkind), - RelationGetRelationName(rel)); + errmsg("\"%s\" is not a table", relname))); - if (!allowSystemTableMods && IsSystemRelation(rel)) + if (!allowSystemTableMods && IsSystemClass(relid, reltuple)) ereport(ERROR, (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), errmsg("permission denied: \"%s\" is a system catalog", - RelationGetRelationName(rel)))); + relname))); +} + +/* + * Check that current user has the permission to truncate given relation. + */ +static void +truncate_check_perms(Oid relid, Form_pg_class reltuple) +{ + char *relname = NameStr(reltuple->relname); + AclResult aclresult; + /* Permissions checks */ + aclresult = pg_class_aclcheck(relid, GetUserId(), ACL_TRUNCATE); + if (aclresult != ACLCHECK_OK) + aclcheck_error(aclresult, get_relkind_objtype(reltuple->relkind), + relname); +} + +/* + * Set of extra sanity checks to check if a given relation is safe to + * truncate. + */ +static void +truncate_check_activity(Relation rel) +{ /* * Don't allow truncate on temp tables of other backends ... their local * buffer manager is not going to cope. |