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Fix pgstattuple functions to use regclass-type as the argument.

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This allows us to specify the target relation with several expressions,
'relname', 'schemaname.relname' and OID in all pgstattuple functions.
pgstatindex() and pg_relpages() could not accept OID as the argument
so far.

Per discussion on -hackers, we decided to keep two types of interfaces,
with regclass-type and TEXT-type argument, for each pgstattuple
function because of the backward-compatibility issue. The functions
which have TEXT-type argument will be deprecated in the future release.

Patch by Satoshi Nagayasu, reviewed by Rushabh Lathia and Fujii Masao.
This commit is contained in:
Fujii Masao
2013-07-19 03:50:20 +09:00
parent d26888bc4d
commit 1dc118660b
8 changed files with 280 additions and 29 deletions
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84
contrib/pgstattuple/expected/pgstattuple.out
View File

@ -5,24 +5,78 @@ CREATE EXTENSION pgstattuple;
-- indexes should be that.
--
create table test (a int primary key, b int[]);
select * from pgstattuple('test');
table_len | tuple_count | tuple_len | tuple_percent | dead_tuple_count | dead_tuple_len | dead_tuple_percent | free_space | free_percent
-----------+-------------+-----------+---------------+------------------+----------------+--------------------+------------+--------------
0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
(1 row)
select * from pgstattuple('test'::text);
table_len | tuple_count | tuple_len | tuple_percent | dead_tuple_count | dead_tuple_len | dead_tuple_percent | free_space | free_percent
-----------+-------------+-----------+---------------+------------------+----------------+--------------------+------------+--------------
0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
(1 row)
select * from pgstattuple('test'::name);
table_len | tuple_count | tuple_len | tuple_percent | dead_tuple_count | dead_tuple_len | dead_tuple_percent | free_space | free_percent
-----------+-------------+-----------+---------------+------------------+----------------+--------------------+------------+--------------
0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
(1 row)
select * from pgstattuple('test'::regclass);
table_len | tuple_count | tuple_len | tuple_percent | dead_tuple_count | dead_tuple_len | dead_tuple_percent | free_space | free_percent
-----------+-------------+-----------+---------------+------------------+----------------+--------------------+------------+--------------
0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
(1 row)
select pgstattuple(oid) from pg_class where relname = 'test';
pgstattuple
---------------------
(0,0,0,0,0,0,0,0,0)
(1 row)
select pgstattuple(relname) from pg_class where relname = 'test';
pgstattuple
---------------------
(0,0,0,0,0,0,0,0,0)
(1 row)
select * from pgstatindex('test_pkey');
version | tree_level | index_size | root_block_no | internal_pages | leaf_pages | empty_pages | deleted_pages | avg_leaf_density | leaf_fragmentation
---------+------------+------------+---------------+----------------+------------+-------------+---------------+------------------+--------------------
2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | NaN | NaN
(1 row)
select * from pgstatindex('test_pkey'::text);
version | tree_level | index_size | root_block_no | internal_pages | leaf_pages | empty_pages | deleted_pages | avg_leaf_density | leaf_fragmentation
---------+------------+------------+---------------+----------------+------------+-------------+---------------+------------------+--------------------
2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | NaN | NaN
(1 row)
select * from pgstatindex('test_pkey'::name);
version | tree_level | index_size | root_block_no | internal_pages | leaf_pages | empty_pages | deleted_pages | avg_leaf_density | leaf_fragmentation
---------+------------+------------+---------------+----------------+------------+-------------+---------------+------------------+--------------------
2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | NaN | NaN
(1 row)
select * from pgstatindex('test_pkey'::regclass);
version | tree_level | index_size | root_block_no | internal_pages | leaf_pages | empty_pages | deleted_pages | avg_leaf_density | leaf_fragmentation
---------+------------+------------+---------------+----------------+------------+-------------+---------------+------------------+--------------------
2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | NaN | NaN
(1 row)
select pgstatindex(oid) from pg_class where relname = 'test_pkey';
pgstatindex
---------------------------
(2,0,0,0,0,0,0,0,NaN,NaN)
(1 row)
select pgstatindex(relname) from pg_class where relname = 'test_pkey';
pgstatindex
---------------------------
(2,0,0,0,0,0,0,0,NaN,NaN)
(1 row)
select pg_relpages('test');
pg_relpages
-------------
@ -35,6 +89,36 @@ select pg_relpages('test_pkey');
1
(1 row)
select pg_relpages('test_pkey'::text);
pg_relpages
-------------
1
(1 row)
select pg_relpages('test_pkey'::name);
pg_relpages
-------------
1
(1 row)
select pg_relpages('test_pkey'::regclass);
pg_relpages
-------------
1
(1 row)
select pg_relpages(oid) from pg_class where relname = 'test_pkey';
pg_relpages
-------------
1
(1 row)
select pg_relpages(relname) from pg_class where relname = 'test_pkey';
pg_relpages
-------------
1
(1 row)
create index test_ginidx on test using gin (b);
select * from pgstatginindex('test_ginidx');
version | pending_pages | pending_tuples