mirror of https://github.com/postgres/postgres
Add "LP_DEAD item?" column to GiST pageinspect functions
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
parent
fa41cf8f18
commit
9e596b65f4
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@ -31,25 +31,25 @@ SELECT * FROM gist_page_opaque_info(get_raw_page('test_gist_idx', 2));
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COMMIT;
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SELECT * FROM gist_page_items(get_raw_page('test_gist_idx', 0), 'test_gist_idx');
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itemoffset | ctid | itemlen | keys
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------------+-----------+---------+-------------------
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1 | (1,65535) | 40 | (p)=((166,166))
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2 | (2,65535) | 40 | (p)=((332,332))
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3 | (3,65535) | 40 | (p)=((498,498))
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4 | (4,65535) | 40 | (p)=((664,664))
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5 | (5,65535) | 40 | (p)=((830,830))
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6 | (6,65535) | 40 | (p)=((996,996))
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7 | (7,65535) | 40 | (p)=((1000,1000))
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itemoffset | ctid | itemlen | dead | keys
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------------+-----------+---------+------+-------------------
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1 | (1,65535) | 40 | f | (p)=((166,166))
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2 | (2,65535) | 40 | f | (p)=((332,332))
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3 | (3,65535) | 40 | f | (p)=((498,498))
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4 | (4,65535) | 40 | f | (p)=((664,664))
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5 | (5,65535) | 40 | f | (p)=((830,830))
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6 | (6,65535) | 40 | f | (p)=((996,996))
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7 | (7,65535) | 40 | f | (p)=((1000,1000))
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(7 rows)
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SELECT * FROM gist_page_items(get_raw_page('test_gist_idx', 1), 'test_gist_idx') LIMIT 5;
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itemoffset | ctid | itemlen | keys
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------------+-------+---------+-------------
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1 | (0,1) | 40 | (p)=((1,1))
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2 | (0,2) | 40 | (p)=((2,2))
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3 | (0,3) | 40 | (p)=((3,3))
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4 | (0,4) | 40 | (p)=((4,4))
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5 | (0,5) | 40 | (p)=((5,5))
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itemoffset | ctid | itemlen | dead | keys
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------------+-------+---------+------+-------------
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1 | (0,1) | 40 | f | (p)=((1,1))
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2 | (0,2) | 40 | f | (p)=((2,2))
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3 | (0,3) | 40 | f | (p)=((3,3))
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4 | (0,4) | 40 | f | (p)=((4,4))
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5 | (0,5) | 40 | f | (p)=((5,5))
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(5 rows)
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-- gist_page_items_bytea prints the raw key data as a bytea. The output of that is
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@ -146,8 +146,8 @@ gist_page_items_bytea(PG_FUNCTION_ARGS)
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offset <= maxoff;
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offset++)
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{
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Datum values[4];
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bool nulls[4];
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Datum values[5];
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bool nulls[5];
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ItemId id;
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IndexTuple itup;
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bytea *tuple_bytea;
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@ -170,7 +170,8 @@ gist_page_items_bytea(PG_FUNCTION_ARGS)
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tuple_bytea = (bytea *) palloc(tuple_len + VARHDRSZ);
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SET_VARSIZE(tuple_bytea, tuple_len + VARHDRSZ);
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memcpy(VARDATA(tuple_bytea), itup, tuple_len);
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values[3] = PointerGetDatum(tuple_bytea);
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values[3] = BoolGetDatum(ItemIdIsDead(id));
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values[4] = PointerGetDatum(tuple_bytea);
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tuplestore_putvalues(tupstore, tupdesc, values, nulls);
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}
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@ -237,8 +238,8 @@ gist_page_items(PG_FUNCTION_ARGS)
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offset <= maxoff;
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offset++)
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{
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Datum values[4];
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bool nulls[4];
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Datum values[5];
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bool nulls[5];
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ItemId id;
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IndexTuple itup;
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Datum itup_values[INDEX_MAX_KEYS];
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@ -260,14 +261,15 @@ gist_page_items(PG_FUNCTION_ARGS)
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values[0] = DatumGetInt16(offset);
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values[1] = ItemPointerGetDatum(&itup->t_tid);
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values[2] = Int32GetDatum((int) IndexTupleSize(itup));
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values[3] = BoolGetDatum(ItemIdIsDead(id));
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key_desc = BuildIndexValueDescription(indexRel, itup_values, itup_isnull);
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if (key_desc)
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values[3] = CStringGetTextDatum(key_desc);
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values[4] = CStringGetTextDatum(key_desc);
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else
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{
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values[3] = (Datum) 0;
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nulls[3] = true;
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values[4] = (Datum) 0;
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nulls[4] = true;
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}
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tuplestore_putvalues(tupstore, tupdesc, values, nulls);
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@ -22,6 +22,7 @@ CREATE FUNCTION gist_page_items_bytea(IN page bytea,
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OUT itemoffset smallint,
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OUT ctid tid,
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OUT itemlen smallint,
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OUT dead boolean,
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OUT key_data bytea)
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RETURNS SETOF record
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AS 'MODULE_PATHNAME', 'gist_page_items_bytea'
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@ -35,6 +36,7 @@ CREATE FUNCTION gist_page_items(IN page bytea,
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OUT itemoffset smallint,
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OUT ctid tid,
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OUT itemlen smallint,
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OUT dead boolean,
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OUT keys text)
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RETURNS SETOF record
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AS 'MODULE_PATHNAME', 'gist_page_items'
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@ -714,15 +714,15 @@ test=# SELECT * FROM gist_page_opaque_info(get_raw_page('test_gist_idx', 2));
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the data stored in a page of a <acronym>GiST</acronym> index. For example:
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<screen>
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test=# SELECT * FROM gist_page_items(get_raw_page('test_gist_idx', 0), 'test_gist_idx');
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itemoffset | ctid | itemlen | keys
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------------+-----------+---------+-------------------
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1 | (1,65535) | 40 | (p)=((166,166))
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2 | (2,65535) | 40 | (p)=((332,332))
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3 | (3,65535) | 40 | (p)=((498,498))
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4 | (4,65535) | 40 | (p)=((664,664))
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5 | (5,65535) | 40 | (p)=((830,830))
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6 | (6,65535) | 40 | (p)=((996,996))
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7 | (7,65535) | 40 | (p)=((1000,1000))
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itemoffset | ctid | itemlen | dead | keys
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------------+-----------+---------+------+-------------------
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1 | (1,65535) | 40 | f | (p)=((166,166))
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2 | (2,65535) | 40 | f | (p)=((332,332))
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3 | (3,65535) | 40 | f | (p)=((498,498))
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4 | (4,65535) | 40 | f | (p)=((664,664))
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5 | (5,65535) | 40 | f | (p)=((830,830))
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6 | (6,65535) | 40 | f | (p)=((996,996))
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7 | (7,65535) | 40 | f | (p)=((1000,1000))
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(7 rows)
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</screen>
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</para>
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@ -745,15 +745,15 @@ test=# SELECT * FROM gist_page_items(get_raw_page('test_gist_idx', 0), 'test_gis
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example:
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<screen>
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test=# SELECT * FROM gist_page_items_bytea(get_raw_page('test_gist_idx', 0));
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itemoffset | ctid | itemlen | key_data
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------------+-----------+---------+-------------------------------------------&zwsp;-----------------------------------------
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1 | (1,65535) | 40 | \x00000100ffff28000000000000c0644000000000&zwsp;00c06440000000000000f03f000000000000f03f
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2 | (2,65535) | 40 | \x00000200ffff28000000000000c0744000000000&zwsp;00c074400000000000e064400000000000e06440
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3 | (3,65535) | 40 | \x00000300ffff28000000000000207f4000000000&zwsp;00207f400000000000d074400000000000d07440
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4 | (4,65535) | 40 | \x00000400ffff28000000000000c0844000000000&zwsp;00c084400000000000307f400000000000307f40
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5 | (5,65535) | 40 | \x00000500ffff28000000000000f0894000000000&zwsp;00f089400000000000c884400000000000c88440
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6 | (6,65535) | 40 | \x00000600ffff28000000000000208f4000000000&zwsp;00208f400000000000f889400000000000f88940
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7 | (7,65535) | 40 | \x00000700ffff28000000000000408f4000000000&zwsp;00408f400000000000288f400000000000288f40
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itemoffset | ctid | itemlen | dead | key_data
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------------+-----------+---------+------+-----------------------------------------&zwsp;-------------------------------------------
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1 | (1,65535) | 40 | f | \x00000100ffff28000000000000c0644000000000&zwsp;00c06440000000000000f03f000000000000f03f
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2 | (2,65535) | 40 | f | \x00000200ffff28000000000000c0744000000000&zwsp;00c074400000000000e064400000000000e06440
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3 | (3,65535) | 40 | f | \x00000300ffff28000000000000207f4000000000&zwsp;00207f400000000000d074400000000000d07440
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4 | (4,65535) | 40 | f | \x00000400ffff28000000000000c0844000000000&zwsp;00c084400000000000307f400000000000307f40
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5 | (5,65535) | 40 | f | \x00000500ffff28000000000000f0894000000000&zwsp;00f089400000000000c884400000000000c88440
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6 | (6,65535) | 40 | f | \x00000600ffff28000000000000208f4000000000&zwsp;00208f400000000000f889400000000000f88940
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7 | (7,65535) | 40 | f | \x00000700ffff28000000000000408f4000000000&zwsp;00408f400000000000288f400000000000288f40
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(7 rows)
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</screen>
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</para>
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