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postgresql/src/include/catalog
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Tom Lane 25c7183c06 Fix misbehavior with expression indexes on ON COMMIT DELETE ROWS tables. 
We implement ON COMMIT DELETE ROWS by truncating tables marked that
way, which requires also truncating/rebuilding their indexes.  But
RelationTruncateIndexes asks the relcache for up-to-date copies of any
index expressions, which may cause execution of eval_const_expressions
on them, which can result in actual execution of subexpressions.
This is a bad thing to have happening during ON COMMIT.  Manuel Rigger
reported that use of a SQL function resulted in crashes due to
expectations that ActiveSnapshot would be set, which it isn't.
The most obvious fix perhaps would be to push a snapshot during
PreCommit_on_commit_actions, but I think that would just open the door
to more problems: CommitTransaction explicitly expects that no
user-defined code can be running at this point.

Fortunately, since we know that no tuples exist to be indexed, there
seems no need to use the real index expressions or predicates during
RelationTruncateIndexes.  We can set up dummy index expressions
instead (we do need something that will expose the right data type,
as there are places that build index tupdescs based on this), and
just ignore predicates and exclusion constraints.

In a green field it'd likely be better to reimplement ON COMMIT DELETE
ROWS using the same "init fork" infrastructure used for unlogged
relations.  That seems impractical without catalog changes though,
and even without that it'd be too big a change to back-patch.
So for now do it like this.

Per private report from Manuel Rigger.  This has been broken forever,
so back-patch to all supported branches.
2019-12-01 13:09:27 -05:00
..
.gitignore Convert cvsignore to gitignore, and add .gitignore for build targets. 2010-09-22 12:57:04 +02:00
binary_upgrade.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
catalog.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
catversion.h Use MINVALUE/MAXVALUE instead of UNBOUNDED for range partition bounds. 2017-07-21 09:20:47 +01:00
dependency.h Install dependencies to prevent dropping partition key columns. 2019-07-22 14:55:23 -04:00
duplicate_oids pgindent run for 9.4 2014-05-06 12:12:18 -04:00
genbki.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
heap.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
index.h Fix misbehavior with expression indexes on ON COMMIT DELETE ROWS tables. 2019-12-01 13:09:27 -05:00
indexing.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
namespace.h Require the schema qualification in pg_temp.type_name(arg). 2019-08-05 07:48:45 -07:00
objectaccess.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
objectaddress.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
opfam_internal.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
partition.h Don't lock tables in RelationGetPartitionDispatchInfo. 2017-08-17 15:47:29 -04:00
pg_aggregate.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_am.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_amop.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_amproc.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_attrdef.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_attribute.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_auth_members.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_authid.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_cast.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_class.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_collation.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_collation_fn.h Rethink behavior of pg_import_system_collations(). 2017-06-23 14:19:58 -04:00
pg_constraint.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_constraint_fn.h Always require SELECT permission for ON CONFLICT DO UPDATE. 2017-11-06 09:17:44 +00:00
pg_control.h Add static assertions about pg_control fitting into one disk sector. 2017-07-19 16:16:57 -04:00
pg_conversion.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_conversion_fn.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_database.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_db_role_setting.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_default_acl.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_depend.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_description.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_enum.h Revert to 9.6 treatment of ALTER TYPE enumtype ADD VALUE. 2017-09-27 16:14:37 -04:00
pg_event_trigger.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_extension.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_foreign_data_wrapper.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_foreign_server.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_foreign_table.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_index.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_inherits.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_inherits_fn.h Fix transition tables for partition/inheritance. 2017-06-28 18:55:03 +01:00
pg_init_privs.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_language.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_largeobject.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_largeobject_metadata.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_namespace.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_opclass.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_operator.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_operator_fn.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_opfamily.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_partitioned_table.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_pltemplate.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_policy.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_proc.h Fix typo 2019-08-21 11:12:44 -04:00
pg_proc_fn.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_publication.h Fix filtering of unsupported relations in logical replication 2018-02-23 22:09:26 -05:00
pg_publication_rel.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_range.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_replication_origin.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_rewrite.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_seclabel.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_sequence.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_shdepend.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_shdescription.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_shseclabel.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_statistic.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_statistic_ext.h Message style fixes 2017-09-11 11:20:47 -04:00
pg_subscription.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_subscription_rel.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_tablespace.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_transform.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_trigger.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_ts_config.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_ts_config_map.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_ts_dict.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_ts_parser.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_ts_template.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_type.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_type_fn.h Fix missing role dependencies for some schema and type ACLs. 2018-11-09 20:42:03 -05:00
pg_user_mapping.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
storage.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
storage_xlog.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
toasting.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
unused_oids Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00