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Add "LP_DEAD item?" column to GiST pageinspect functions

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This brings gist_page_items() and gist_page_items_bytea() in line with
nbtree's bt_page_items() function.

Minor follow-up to commit 756ab291, which added the GiST functions.

Author: Andrey Borodin <x4mmm@yandex-team.ru>
Discussion: https://postgr.es/m/E0794687-7315-4C29-A9C7-EC54D448596D@yandex-team.ru
This commit is contained in:
Peter Geoghegan
2021-02-14 20:11:11 -08:00
parent fa41cf8f18
commit 9e596b65f4
4 changed files with 46 additions and 42 deletions
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32
contrib/pageinspect/expected/gist.out
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@ -31,25 +31,25 @@ SELECT * FROM gist_page_opaque_info(get_raw_page('test_gist_idx', 2));
COMMIT; COMMIT;
SELECT * FROM gist_page_items(get_raw_page('test_gist_idx', 0), 'test_gist_idx'); SELECT * FROM gist_page_items(get_raw_page('test_gist_idx', 0), 'test_gist_idx');
itemoffset | ctid | itemlen | keys itemoffset | ctid | itemlen | dead | keys
------------+-----------+---------+------------------- ------------+-----------+---------+------+-------------------
1 | (1,65535) | 40 | (p)=((166,166)) 1 | (1,65535) | 40 | f | (p)=((166,166))
2 | (2,65535) | 40 | (p)=((332,332)) 2 | (2,65535) | 40 | f | (p)=((332,332))
3 | (3,65535) | 40 | (p)=((498,498)) 3 | (3,65535) | 40 | f | (p)=((498,498))
4 | (4,65535) | 40 | (p)=((664,664)) 4 | (4,65535) | 40 | f | (p)=((664,664))
5 | (5,65535) | 40 | (p)=((830,830)) 5 | (5,65535) | 40 | f | (p)=((830,830))
6 | (6,65535) | 40 | (p)=((996,996)) 6 | (6,65535) | 40 | f | (p)=((996,996))
7 | (7,65535) | 40 | (p)=((1000,1000)) 7 | (7,65535) | 40 | f | (p)=((1000,1000))
(7 rows) (7 rows)
SELECT * FROM gist_page_items(get_raw_page('test_gist_idx', 1), 'test_gist_idx') LIMIT 5; SELECT * FROM gist_page_items(get_raw_page('test_gist_idx', 1), 'test_gist_idx') LIMIT 5;
itemoffset | ctid | itemlen | keys itemoffset | ctid | itemlen | dead | keys
------------+-------+---------+------------- ------------+-------+---------+------+-------------
1 | (0,1) | 40 | (p)=((1,1)) 1 | (0,1) | 40 | f | (p)=((1,1))
2 | (0,2) | 40 | (p)=((2,2)) 2 | (0,2) | 40 | f | (p)=((2,2))
3 | (0,3) | 40 | (p)=((3,3)) 3 | (0,3) | 40 | f | (p)=((3,3))
4 | (0,4) | 40 | (p)=((4,4)) 4 | (0,4) | 40 | f | (p)=((4,4))
5 | (0,5) | 40 | (p)=((5,5)) 5 | (0,5) | 40 | f | (p)=((5,5))
(5 rows) (5 rows)
-- gist_page_items_bytea prints the raw key data as a bytea. The output of that is -- gist_page_items_bytea prints the raw key data as a bytea. The output of that is

18
contrib/pageinspect/gistfuncs.c
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@ -146,8 +146,8 @@ gist_page_items_bytea(PG_FUNCTION_ARGS)
offset <= maxoff; offset <= maxoff;
offset++) offset++)
{ {
Datum values[4]; Datum values[5];
bool nulls[4]; bool nulls[5];
ItemId id; ItemId id;
IndexTuple itup; IndexTuple itup;
bytea *tuple_bytea; bytea *tuple_bytea;
@ -170,7 +170,8 @@ gist_page_items_bytea(PG_FUNCTION_ARGS)
tuple_bytea = (bytea *) palloc(tuple_len + VARHDRSZ); tuple_bytea = (bytea *) palloc(tuple_len + VARHDRSZ);
SET_VARSIZE(tuple_bytea, tuple_len + VARHDRSZ); SET_VARSIZE(tuple_bytea, tuple_len + VARHDRSZ);
memcpy(VARDATA(tuple_bytea), itup, tuple_len); memcpy(VARDATA(tuple_bytea), itup, tuple_len);
values[3] = PointerGetDatum(tuple_bytea); values[3] = BoolGetDatum(ItemIdIsDead(id));
values[4] = PointerGetDatum(tuple_bytea);
tuplestore_putvalues(tupstore, tupdesc, values, nulls); tuplestore_putvalues(tupstore, tupdesc, values, nulls);
} }
@ -237,8 +238,8 @@ gist_page_items(PG_FUNCTION_ARGS)
offset <= maxoff; offset <= maxoff;
offset++) offset++)
{ {
Datum values[4]; Datum values[5];
bool nulls[4]; bool nulls[5];
ItemId id; ItemId id;
IndexTuple itup; IndexTuple itup;
Datum itup_values[INDEX_MAX_KEYS]; Datum itup_values[INDEX_MAX_KEYS];
@ -260,14 +261,15 @@ gist_page_items(PG_FUNCTION_ARGS)
values[0] = DatumGetInt16(offset); values[0] = DatumGetInt16(offset);
values[1] = ItemPointerGetDatum(&itup->t_tid); values[1] = ItemPointerGetDatum(&itup->t_tid);
values[2] = Int32GetDatum((int) IndexTupleSize(itup)); values[2] = Int32GetDatum((int) IndexTupleSize(itup));
values[3] = BoolGetDatum(ItemIdIsDead(id));
key_desc = BuildIndexValueDescription(indexRel, itup_values, itup_isnull); key_desc = BuildIndexValueDescription(indexRel, itup_values, itup_isnull);
if (key_desc) if (key_desc)
values[3] = CStringGetTextDatum(key_desc); values[4] = CStringGetTextDatum(key_desc);
else else
{ {
values[3] = (Datum) 0; values[4] = (Datum) 0;
nulls[3] = true; nulls[4] = true;
} }
tuplestore_putvalues(tupstore, tupdesc, values, nulls); tuplestore_putvalues(tupstore, tupdesc, values, nulls);

2
contrib/pageinspect/pageinspect--1.8--1.9.sql
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@ -22,6 +22,7 @@ CREATE FUNCTION gist_page_items_bytea(IN page bytea,
OUT itemoffset smallint, OUT itemoffset smallint,
OUT ctid tid, OUT ctid tid,
OUT itemlen smallint, OUT itemlen smallint,
OUT dead boolean,
OUT key_data bytea) OUT key_data bytea)
RETURNS SETOF record RETURNS SETOF record
AS 'MODULE_PATHNAME', 'gist_page_items_bytea' AS 'MODULE_PATHNAME', 'gist_page_items_bytea'
@ -35,6 +36,7 @@ CREATE FUNCTION gist_page_items(IN page bytea,
OUT itemoffset smallint, OUT itemoffset smallint,
OUT ctid tid, OUT ctid tid,
OUT itemlen smallint, OUT itemlen smallint,
OUT dead boolean,
OUT keys text) OUT keys text)
RETURNS SETOF record RETURNS SETOF record
AS 'MODULE_PATHNAME', 'gist_page_items' AS 'MODULE_PATHNAME', 'gist_page_items'

36
doc/src/sgml/pageinspect.sgml
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@ -714,15 +714,15 @@ test=# SELECT * FROM gist_page_opaque_info(get_raw_page('test_gist_idx', 2));
the data stored in a page of a <acronym>GiST</acronym> index. For example: the data stored in a page of a <acronym>GiST</acronym> index. For example:
<screen> <screen>
test=# SELECT * FROM gist_page_items(get_raw_page('test_gist_idx', 0), 'test_gist_idx'); test=# SELECT * FROM gist_page_items(get_raw_page('test_gist_idx', 0), 'test_gist_idx');
itemoffset | ctid | itemlen | keys itemoffset | ctid | itemlen | dead | keys
------------+-----------+---------+------------------- ------------+-----------+---------+------+-------------------
1 | (1,65535) | 40 | (p)=((166,166)) 1 | (1,65535) | 40 | f | (p)=((166,166))
2 | (2,65535) | 40 | (p)=((332,332)) 2 | (2,65535) | 40 | f | (p)=((332,332))
3 | (3,65535) | 40 | (p)=((498,498)) 3 | (3,65535) | 40 | f | (p)=((498,498))
4 | (4,65535) | 40 | (p)=((664,664)) 4 | (4,65535) | 40 | f | (p)=((664,664))
5 | (5,65535) | 40 | (p)=((830,830)) 5 | (5,65535) | 40 | f | (p)=((830,830))
6 | (6,65535) | 40 | (p)=((996,996)) 6 | (6,65535) | 40 | f | (p)=((996,996))
7 | (7,65535) | 40 | (p)=((1000,1000)) 7 | (7,65535) | 40 | f | (p)=((1000,1000))
(7 rows) (7 rows)
</screen> </screen>
</para> </para>
@ -745,15 +745,15 @@ test=# SELECT * FROM gist_page_items(get_raw_page('test_gist_idx', 0), 'test_gis
example: example:
<screen> <screen>
test=# SELECT * FROM gist_page_items_bytea(get_raw_page('test_gist_idx', 0)); test=# SELECT * FROM gist_page_items_bytea(get_raw_page('test_gist_idx', 0));
itemoffset | ctid | itemlen | key_data itemoffset | ctid | itemlen | dead | key_data
------------+-----------+---------+-------------------------------------------&zwsp;----------------------------------------- ------------+-----------+---------+------+-----------------------------------------&zwsp;-------------------------------------------
1 | (1,65535) | 40 | \x00000100ffff28000000000000c0644000000000&zwsp;00c06440000000000000f03f000000000000f03f 1 | (1,65535) | 40 | f | \x00000100ffff28000000000000c0644000000000&zwsp;00c06440000000000000f03f000000000000f03f
2 | (2,65535) | 40 | \x00000200ffff28000000000000c0744000000000&zwsp;00c074400000000000e064400000000000e06440 2 | (2,65535) | 40 | f | \x00000200ffff28000000000000c0744000000000&zwsp;00c074400000000000e064400000000000e06440
3 | (3,65535) | 40 | \x00000300ffff28000000000000207f4000000000&zwsp;00207f400000000000d074400000000000d07440 3 | (3,65535) | 40 | f | \x00000300ffff28000000000000207f4000000000&zwsp;00207f400000000000d074400000000000d07440
4 | (4,65535) | 40 | \x00000400ffff28000000000000c0844000000000&zwsp;00c084400000000000307f400000000000307f40 4 | (4,65535) | 40 | f | \x00000400ffff28000000000000c0844000000000&zwsp;00c084400000000000307f400000000000307f40
5 | (5,65535) | 40 | \x00000500ffff28000000000000f0894000000000&zwsp;00f089400000000000c884400000000000c88440 5 | (5,65535) | 40 | f | \x00000500ffff28000000000000f0894000000000&zwsp;00f089400000000000c884400000000000c88440
6 | (6,65535) | 40 | \x00000600ffff28000000000000208f4000000000&zwsp;00208f400000000000f889400000000000f88940 6 | (6,65535) | 40 | f | \x00000600ffff28000000000000208f4000000000&zwsp;00208f400000000000f889400000000000f88940
7 | (7,65535) | 40 | \x00000700ffff28000000000000408f4000000000&zwsp;00408f400000000000288f400000000000288f40 7 | (7,65535) | 40 | f | \x00000700ffff28000000000000408f4000000000&zwsp;00408f400000000000288f400000000000288f40
(7 rows) (7 rows)
</screen> </screen>
</para> </para>