Teach relation_is_updatable() about partitioned tables.
Table partitioning, introduced in commit f0e44751d7
, added a new
relkind - RELKIND_PARTITIONED_TABLE. Update relation_is_updatable() to
handle it. Specifically, partitioned tables and simple views built on
top of them are updatable.
This affects the SQL-callable functions pg_relation_is_updatable() and
pg_column_is_updatable(), and the views information_schema.views and
information_schema.columns.
Dean Rasheed, reviewed by Ashutosh Bapat.
Discussion: https://postgr.es/m/CAEZATCXnbiFkMXgF4Ez1pmM2c-tS1z33bSq7OGbw7QQhHov%2B6Q%40mail.gmail.com
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@ -2454,7 +2454,8 @@ relation_is_updatable(Oid reloid,
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return 0;
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/* If the relation is a table, it is always updatable */
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if (rel->rd_rel->relkind == RELKIND_RELATION)
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if (rel->rd_rel->relkind == RELKIND_RELATION ||
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rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
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{
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relation_close(rel, AccessShareLock);
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return ALL_EVENTS;
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@ -2568,7 +2569,8 @@ relation_is_updatable(Oid reloid,
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base_rte = rt_fetch(rtr->rtindex, viewquery->rtable);
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Assert(base_rte->rtekind == RTE_RELATION);
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if (base_rte->relkind != RELKIND_RELATION)
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if (base_rte->relkind != RELKIND_RELATION &&
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base_rte->relkind != RELKIND_PARTITIONED_TABLE)
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{
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baseoid = base_rte->relid;
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include_cols = adjust_view_column_set(updatable_cols,
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@ -2378,6 +2378,42 @@ alter table pt11 add a int not null;
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alter table pt1 attach partition pt11 for values from (2) to (5);
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alter table pt attach partition pt1 for values from (1, 2) to (1, 10);
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create view ptv as select * from pt;
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select events & 4 != 0 AS upd,
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events & 8 != 0 AS ins,
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events & 16 != 0 AS del
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from pg_catalog.pg_relation_is_updatable('pt'::regclass, false) t(events);
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upd | ins | del
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-----+-----+-----
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t | t | t
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(1 row)
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select pg_catalog.pg_column_is_updatable('pt'::regclass, 1::smallint, false);
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pg_column_is_updatable
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------------------------
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t
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(1 row)
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select pg_catalog.pg_column_is_updatable('pt'::regclass, 2::smallint, false);
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pg_column_is_updatable
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------------------------
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t
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(1 row)
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select table_name, is_updatable, is_insertable_into
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from information_schema.views where table_name = 'ptv';
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table_name | is_updatable | is_insertable_into
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------------+--------------+--------------------
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ptv | YES | YES
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(1 row)
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select table_name, column_name, is_updatable
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from information_schema.columns where table_name = 'ptv' order by column_name;
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table_name | column_name | is_updatable
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------------+-------------+--------------
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ptv | a | YES
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ptv | b | YES
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(2 rows)
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insert into ptv values (1, 2);
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select tableoid::regclass, * from pt;
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tableoid | a | b
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@ -1125,6 +1125,16 @@ alter table pt1 attach partition pt11 for values from (2) to (5);
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alter table pt attach partition pt1 for values from (1, 2) to (1, 10);
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create view ptv as select * from pt;
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select events & 4 != 0 AS upd,
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events & 8 != 0 AS ins,
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events & 16 != 0 AS del
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from pg_catalog.pg_relation_is_updatable('pt'::regclass, false) t(events);
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select pg_catalog.pg_column_is_updatable('pt'::regclass, 1::smallint, false);
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select pg_catalog.pg_column_is_updatable('pt'::regclass, 2::smallint, false);
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select table_name, is_updatable, is_insertable_into
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from information_schema.views where table_name = 'ptv';
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select table_name, column_name, is_updatable
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from information_schema.columns where table_name = 'ptv' order by column_name;
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insert into ptv values (1, 2);
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select tableoid::regclass, * from pt;
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create view ptv_wco as select * from pt where a = 0 with check option;
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