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2ed532ee8c
Most error messages about a relkind that was not supported or appropriate for the command was of the pattern "relation \"%s\" is not a table, foreign table, or materialized view" This style can become verbose and tedious to maintain. Moreover, it's not very helpful: If I'm trying to create a comment on a TOAST table, which is not supported, then the information that I could have created a comment on a materialized view is pointless. Instead, write the primary error message shorter and saying more directly that what was attempted is not possible. Then, in the detail message, explain that the operation is not supported for the relkind the object was. To simplify that, add a new function errdetail_relkind_not_supported() that does this. In passing, make use of RELKIND_HAS_STORAGE() where appropriate, instead of listing out the relkinds individually. Reviewed-by: Michael Paquier <michael@paquier.xyz> Reviewed-by: Alvaro Herrera <alvherre@alvh.no-ip.org> Discussion: https://www.postgresql.org/message-id/flat/dc35a398-37d0-75ce-07ea-1dd71d98f8ec@2ndquadrant.com
210 lines
6.8 KiB
Plaintext
210 lines
6.8 KiB
Plaintext
CREATE EXTENSION pageinspect;
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CREATE TABLE test1 (a int, b int);
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INSERT INTO test1 VALUES (16777217, 131584);
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VACUUM (DISABLE_PAGE_SKIPPING) test1; -- set up FSM
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-- The page contents can vary, so just test that it can be read
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-- successfully, but don't keep the output.
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SELECT octet_length(get_raw_page('test1', 'main', 0)) AS main_0;
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main_0
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--------
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8192
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(1 row)
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SELECT octet_length(get_raw_page('test1', 'main', 1)) AS main_1;
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ERROR: block number 1 is out of range for relation "test1"
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SELECT octet_length(get_raw_page('test1', 'fsm', 0)) AS fsm_0;
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fsm_0
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-------
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8192
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(1 row)
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SELECT octet_length(get_raw_page('test1', 'fsm', 1)) AS fsm_1;
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fsm_1
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-------
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8192
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(1 row)
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SELECT octet_length(get_raw_page('test1', 'vm', 0)) AS vm_0;
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vm_0
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------
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8192
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(1 row)
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SELECT octet_length(get_raw_page('test1', 'vm', 1)) AS vm_1;
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ERROR: block number 1 is out of range for relation "test1"
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SELECT octet_length(get_raw_page('test1', 'main', -1));
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ERROR: invalid block number
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SELECT octet_length(get_raw_page('xxx', 'main', 0));
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ERROR: relation "xxx" does not exist
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SELECT octet_length(get_raw_page('test1', 'xxx', 0));
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ERROR: invalid fork name
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HINT: Valid fork names are "main", "fsm", "vm", and "init".
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SELECT get_raw_page('test1', 0) = get_raw_page('test1', 'main', 0);
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?column?
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----------
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t
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(1 row)
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SELECT pagesize, version FROM page_header(get_raw_page('test1', 0));
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pagesize | version
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----------+---------
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8192 | 4
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(1 row)
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SELECT page_checksum(get_raw_page('test1', 0), 0) IS NOT NULL AS silly_checksum_test;
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silly_checksum_test
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---------------------
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t
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(1 row)
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SELECT page_checksum(get_raw_page('test1', 0), -1);
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ERROR: invalid block number
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SELECT tuple_data_split('test1'::regclass, t_data, t_infomask, t_infomask2, t_bits)
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FROM heap_page_items(get_raw_page('test1', 0));
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tuple_data_split
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-------------------------------
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{"\\x01000001","\\x00020200"}
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(1 row)
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SELECT * FROM fsm_page_contents(get_raw_page('test1', 'fsm', 0));
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fsm_page_contents
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-------------------
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0: 254 +
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1: 254 +
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3: 254 +
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7: 254 +
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15: 254 +
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31: 254 +
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63: 254 +
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127: 254 +
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255: 254 +
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511: 254 +
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1023: 254 +
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2047: 254 +
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4095: 254 +
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fp_next_slot: 0 +
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(1 row)
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-- If we freeze the only tuple on test1, the infomask should
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-- always be the same in all test runs.
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VACUUM (FREEZE, DISABLE_PAGE_SKIPPING) test1;
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SELECT t_infomask, t_infomask2, raw_flags, combined_flags
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FROM heap_page_items(get_raw_page('test1', 0)),
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LATERAL heap_tuple_infomask_flags(t_infomask, t_infomask2);
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t_infomask | t_infomask2 | raw_flags | combined_flags
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------------+-------------+-----------------------------------------------------------+--------------------
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2816 | 2 | {HEAP_XMIN_COMMITTED,HEAP_XMIN_INVALID,HEAP_XMAX_INVALID} | {HEAP_XMIN_FROZEN}
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(1 row)
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-- tests for decoding of combined flags
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-- HEAP_XMAX_SHR_LOCK = (HEAP_XMAX_EXCL_LOCK | HEAP_XMAX_KEYSHR_LOCK)
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SELECT * FROM heap_tuple_infomask_flags(x'0050'::int, 0);
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raw_flags | combined_flags
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---------------------------------------------+----------------------
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{HEAP_XMAX_KEYSHR_LOCK,HEAP_XMAX_EXCL_LOCK} | {HEAP_XMAX_SHR_LOCK}
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(1 row)
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-- HEAP_XMIN_FROZEN = (HEAP_XMIN_COMMITTED | HEAP_XMIN_INVALID)
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SELECT * FROM heap_tuple_infomask_flags(x'0300'::int, 0);
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raw_flags | combined_flags
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-----------------------------------------+--------------------
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{HEAP_XMIN_COMMITTED,HEAP_XMIN_INVALID} | {HEAP_XMIN_FROZEN}
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(1 row)
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-- HEAP_MOVED = (HEAP_MOVED_IN | HEAP_MOVED_OFF)
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SELECT * FROM heap_tuple_infomask_flags(x'C000'::int, 0);
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raw_flags | combined_flags
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--------------------------------+----------------
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{HEAP_MOVED_OFF,HEAP_MOVED_IN} | {HEAP_MOVED}
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(1 row)
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SELECT * FROM heap_tuple_infomask_flags(x'C000'::int, 0);
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raw_flags | combined_flags
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--------------------------------+----------------
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{HEAP_MOVED_OFF,HEAP_MOVED_IN} | {HEAP_MOVED}
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(1 row)
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-- test all flags of t_infomask and t_infomask2
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SELECT unnest(raw_flags)
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FROM heap_tuple_infomask_flags(x'FFFF'::int, x'FFFF'::int) ORDER BY 1;
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unnest
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-----------------------
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HEAP_COMBOCID
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HEAP_HASEXTERNAL
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HEAP_HASNULL
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HEAP_HASOID_OLD
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HEAP_HASVARWIDTH
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HEAP_HOT_UPDATED
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HEAP_KEYS_UPDATED
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HEAP_MOVED_IN
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HEAP_MOVED_OFF
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HEAP_ONLY_TUPLE
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HEAP_UPDATED
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HEAP_XMAX_COMMITTED
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HEAP_XMAX_EXCL_LOCK
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HEAP_XMAX_INVALID
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HEAP_XMAX_IS_MULTI
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HEAP_XMAX_KEYSHR_LOCK
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HEAP_XMAX_LOCK_ONLY
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HEAP_XMIN_COMMITTED
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HEAP_XMIN_INVALID
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(19 rows)
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SELECT unnest(combined_flags)
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FROM heap_tuple_infomask_flags(x'FFFF'::int, x'FFFF'::int) ORDER BY 1;
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unnest
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--------------------
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HEAP_MOVED
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HEAP_XMAX_SHR_LOCK
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HEAP_XMIN_FROZEN
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(3 rows)
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-- no flags at all
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SELECT * FROM heap_tuple_infomask_flags(0, 0);
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raw_flags | combined_flags
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-----------+----------------
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{} | {}
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(1 row)
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-- no combined flags
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SELECT * FROM heap_tuple_infomask_flags(x'0010'::int, 0);
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raw_flags | combined_flags
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-------------------------+----------------
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{HEAP_XMAX_KEYSHR_LOCK} | {}
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(1 row)
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DROP TABLE test1;
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-- check that using any of these functions with a partitioned table or index
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-- would fail
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create table test_partitioned (a int) partition by range (a);
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create index test_partitioned_index on test_partitioned (a);
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select get_raw_page('test_partitioned', 0); -- error about partitioned table
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ERROR: cannot get raw page from relation "test_partitioned"
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DETAIL: This operation is not supported for partitioned tables.
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select get_raw_page('test_partitioned_index', 0); -- error about partitioned index
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ERROR: cannot get raw page from relation "test_partitioned_index"
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DETAIL: This operation is not supported for partitioned indexes.
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-- a regular table which is a member of a partition set should work though
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create table test_part1 partition of test_partitioned for values from ( 1 ) to (100);
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select get_raw_page('test_part1', 0); -- get farther and error about empty table
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ERROR: block number 0 is out of range for relation "test_part1"
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drop table test_partitioned;
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-- check null bitmap alignment for table whose number of attributes is multiple of 8
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create table test8 (f1 int, f2 int, f3 int, f4 int, f5 int, f6 int, f7 int, f8 int);
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insert into test8(f1, f8) values (x'7f00007f'::int, 0);
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select t_bits, t_data from heap_page_items(get_raw_page('test8', 0));
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t_bits | t_data
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----------+--------------------
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10000001 | \x7f00007f00000000
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(1 row)
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select tuple_data_split('test8'::regclass, t_data, t_infomask, t_infomask2, t_bits)
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from heap_page_items(get_raw_page('test8', 0));
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tuple_data_split
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-------------------------------------------------------------
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{"\\x7f00007f",NULL,NULL,NULL,NULL,NULL,NULL,"\\x00000000"}
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(1 row)
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drop table test8;
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