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PostgreSQL provides set of template index access methods, where opclasses have much freedom in the semantics of indexing. These index AMs are GiST, GIN, SP-GiST and BRIN. There opclasses define representation of keys, operations on them and supported search strategies. So, it's natural that opclasses may be faced some tradeoffs, which require user-side decision. This commit implements opclass parameters allowing users to set some values, which tell opclass how to index the particular dataset. This commit doesn't introduce new storage in system catalog. Instead it uses pg_attribute.attoptions, which is used for table column storage options but unused for index attributes. In order to evade changing signature of each opclass support function, we implement unified way to pass options to opclass support functions. Options are set to fn_expr as the constant bytea expression. It's possible due to the fact that opclass support functions are executed outside of expressions, so fn_expr is unused for them. This commit comes with some examples of opclass options usage. We parametrize signature length in GiST. That applies to multiple opclasses: tsvector_ops, gist__intbig_ops, gist_ltree_ops, gist__ltree_ops, gist_trgm_ops and gist_hstore_ops. Also we parametrize maximum number of integer ranges for gist__int_ops. However, the main future usage of this feature is expected to be json, where users would be able to specify which way to index particular json parts. Catversion is bumped. Discussion: https://postgr.es/m/d22c3a18-31c7-1879-fc11-4c1ce2f5e5af%40postgrespro.ru Author: Nikita Glukhov, revised by me Reviwed-by: Nikolay Shaplov, Robert Haas, Tom Lane, Tomas Vondra, Alvaro Herrera
859 lines
13 KiB
Plaintext
859 lines
13 KiB
Plaintext
CREATE EXTENSION intarray;
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-- Check whether any of our opclasses fail amvalidate
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SELECT amname, opcname
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FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
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WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
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amname | opcname
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--------+---------
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(0 rows)
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SELECT intset(1234);
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intset
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--------
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{1234}
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(1 row)
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SELECT icount('{1234234,234234}');
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icount
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--------
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2
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(1 row)
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SELECT sort('{1234234,-30,234234}');
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sort
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----------------------
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{-30,234234,1234234}
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(1 row)
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SELECT sort('{1234234,-30,234234}','asc');
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sort
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----------------------
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{-30,234234,1234234}
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(1 row)
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SELECT sort('{1234234,-30,234234}','desc');
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sort
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----------------------
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{1234234,234234,-30}
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(1 row)
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SELECT sort_asc('{1234234,-30,234234}');
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sort_asc
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----------------------
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{-30,234234,1234234}
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(1 row)
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SELECT sort_desc('{1234234,-30,234234}');
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sort_desc
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----------------------
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{1234234,234234,-30}
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(1 row)
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SELECT uniq('{1234234,-30,-30,234234,-30}');
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uniq
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--------------------------
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{1234234,-30,234234,-30}
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(1 row)
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SELECT uniq(sort_asc('{1234234,-30,-30,234234,-30}'));
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uniq
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----------------------
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{-30,234234,1234234}
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(1 row)
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SELECT idx('{1234234,-30,-30,234234,-30}',-30);
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idx
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-----
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2
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(1 row)
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SELECT subarray('{1234234,-30,-30,234234,-30}',2,3);
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subarray
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------------------
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{-30,-30,234234}
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(1 row)
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SELECT subarray('{1234234,-30,-30,234234,-30}',-1,1);
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subarray
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----------
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{-30}
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(1 row)
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SELECT subarray('{1234234,-30,-30,234234,-30}',0,-1);
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subarray
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--------------------------
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{1234234,-30,-30,234234}
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(1 row)
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SELECT #'{1234234,234234}'::int[];
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?column?
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----------
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2
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(1 row)
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SELECT '{123,623,445}'::int[] + 1245;
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?column?
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--------------------
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{123,623,445,1245}
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(1 row)
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SELECT '{123,623,445}'::int[] + 445;
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?column?
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-------------------
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{123,623,445,445}
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(1 row)
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SELECT '{123,623,445}'::int[] + '{1245,87,445}';
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?column?
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---------------------------
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{123,623,445,1245,87,445}
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(1 row)
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SELECT '{123,623,445}'::int[] - 623;
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?column?
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-----------
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{123,445}
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(1 row)
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SELECT '{123,623,445}'::int[] - '{1623,623}';
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?column?
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-----------
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{123,445}
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(1 row)
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SELECT '{123,623,445}'::int[] | 623;
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?column?
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---------------
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{123,445,623}
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(1 row)
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SELECT '{123,623,445}'::int[] | 1623;
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?column?
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--------------------
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{123,445,623,1623}
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(1 row)
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SELECT '{123,623,445}'::int[] | '{1623,623}';
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?column?
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--------------------
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{123,445,623,1623}
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(1 row)
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SELECT '{123,623,445}'::int[] & '{1623,623}';
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?column?
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----------
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{623}
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(1 row)
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SELECT '{-1,3,1}'::int[] & '{1,2}';
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?column?
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----------
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{1}
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(1 row)
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SELECT '{1}'::int[] & '{2}'::int[];
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?column?
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----------
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{}
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(1 row)
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SELECT array_dims('{1}'::int[] & '{2}'::int[]);
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array_dims
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------------
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(1 row)
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SELECT ('{1}'::int[] & '{2}'::int[]) = '{}'::int[];
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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 ('{}'::int[] & '{}'::int[]) = '{}'::int[];
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?column?
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----------
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t
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(1 row)
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--test query_int
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SELECT '1'::query_int;
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query_int
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-----------
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1
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(1 row)
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SELECT ' 1'::query_int;
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query_int
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-----------
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1
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(1 row)
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SELECT '1 '::query_int;
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query_int
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-----------
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1
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(1 row)
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SELECT ' 1 '::query_int;
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query_int
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-----------
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1
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(1 row)
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SELECT ' ! 1 '::query_int;
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query_int
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-----------
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!1
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(1 row)
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SELECT '!1'::query_int;
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query_int
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-----------
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!1
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(1 row)
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SELECT '1|2'::query_int;
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query_int
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-----------
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1 | 2
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(1 row)
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SELECT '1|!2'::query_int;
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query_int
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-----------
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1 | !2
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(1 row)
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SELECT '!1|2'::query_int;
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query_int
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-----------
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!1 | 2
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(1 row)
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SELECT '!1|!2'::query_int;
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query_int
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-----------
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!1 | !2
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(1 row)
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SELECT '!(!1|!2)'::query_int;
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query_int
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--------------
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!( !1 | !2 )
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(1 row)
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SELECT '!(!1|2)'::query_int;
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query_int
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-------------
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!( !1 | 2 )
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(1 row)
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SELECT '!(1|!2)'::query_int;
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query_int
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-------------
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!( 1 | !2 )
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(1 row)
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SELECT '!(1|2)'::query_int;
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query_int
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------------
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!( 1 | 2 )
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(1 row)
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SELECT '1&2'::query_int;
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query_int
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-----------
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1 & 2
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(1 row)
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SELECT '!1&2'::query_int;
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query_int
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-----------
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!1 & 2
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(1 row)
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SELECT '1&!2'::query_int;
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query_int
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-----------
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1 & !2
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(1 row)
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SELECT '!1&!2'::query_int;
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query_int
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-----------
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!1 & !2
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(1 row)
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SELECT '(1&2)'::query_int;
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query_int
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-----------
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1 & 2
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(1 row)
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SELECT '1&(2)'::query_int;
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query_int
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-----------
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1 & 2
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(1 row)
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SELECT '!(1)&2'::query_int;
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query_int
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-----------
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!1 & 2
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(1 row)
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SELECT '!(1&2)'::query_int;
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query_int
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------------
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!( 1 & 2 )
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(1 row)
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SELECT '1|2&3'::query_int;
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query_int
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-----------
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1 | 2 & 3
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(1 row)
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SELECT '1|(2&3)'::query_int;
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query_int
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-----------
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1 | 2 & 3
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(1 row)
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SELECT '(1|2)&3'::query_int;
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query_int
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---------------
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( 1 | 2 ) & 3
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(1 row)
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SELECT '1|2&!3'::query_int;
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query_int
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------------
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1 | 2 & !3
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(1 row)
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SELECT '1|!2&3'::query_int;
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query_int
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------------
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1 | !2 & 3
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(1 row)
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SELECT '!1|2&3'::query_int;
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query_int
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------------
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!1 | 2 & 3
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(1 row)
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SELECT '!1|(2&3)'::query_int;
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query_int
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------------
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!1 | 2 & 3
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(1 row)
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SELECT '!(1|2)&3'::query_int;
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query_int
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----------------
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!( 1 | 2 ) & 3
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(1 row)
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SELECT '(!1|2)&3'::query_int;
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query_int
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----------------
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( !1 | 2 ) & 3
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(1 row)
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SELECT '1|(2|(4|(5|6)))'::query_int;
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query_int
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-------------------------------
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1 | ( 2 | ( 4 | ( 5 | 6 ) ) )
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(1 row)
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SELECT '1|2|4|5|6'::query_int;
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query_int
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-------------------------------
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( ( ( 1 | 2 ) | 4 ) | 5 ) | 6
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(1 row)
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SELECT '1&(2&(4&(5&6)))'::query_int;
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query_int
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-------------------
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1 & 2 & 4 & 5 & 6
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(1 row)
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SELECT '1&2&4&5&6'::query_int;
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query_int
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-------------------
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1 & 2 & 4 & 5 & 6
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(1 row)
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SELECT '1&(2&(4&(5|6)))'::query_int;
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query_int
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-----------------------
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1 & 2 & 4 & ( 5 | 6 )
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(1 row)
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SELECT '1&(2&(4&(5|!6)))'::query_int;
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query_int
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------------------------
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1 & 2 & 4 & ( 5 | !6 )
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(1 row)
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CREATE TABLE test__int( a int[] );
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\copy test__int from 'data/test__int.data'
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ANALYZE test__int;
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SELECT count(*) from test__int WHERE a && '{23,50}';
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count
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-------
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403
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(1 row)
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SELECT count(*) from test__int WHERE a @@ '23|50';
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count
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-------
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403
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(1 row)
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SELECT count(*) from test__int WHERE a @> '{23,50}';
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count
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-------
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12
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(1 row)
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SELECT count(*) from test__int WHERE a @@ '23&50';
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count
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-------
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12
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(1 row)
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SELECT count(*) from test__int WHERE a @> '{20,23}';
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count
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-------
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12
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(1 row)
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SELECT count(*) from test__int WHERE a <@ '{73,23,20}';
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count
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-------
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10
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(1 row)
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SELECT count(*) from test__int WHERE a = '{73,23,20}';
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count
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-------
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1
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(1 row)
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SELECT count(*) from test__int WHERE a @@ '50&68';
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count
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-------
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9
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(1 row)
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SELECT count(*) from test__int WHERE a @> '{20,23}' or a @> '{50,68}';
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count
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-------
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21
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(1 row)
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SELECT count(*) from test__int WHERE a @@ '(20&23)|(50&68)';
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count
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-------
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21
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(1 row)
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SELECT count(*) from test__int WHERE a @@ '20 | !21';
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count
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-------
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6566
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(1 row)
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SELECT count(*) from test__int WHERE a @@ '!20 & !21';
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count
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-------
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6343
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(1 row)
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SET enable_seqscan = off; -- not all of these would use index by default
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CREATE INDEX text_idx on test__int using gist ( a gist__int_ops );
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SELECT count(*) from test__int WHERE a && '{23,50}';
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count
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-------
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403
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(1 row)
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SELECT count(*) from test__int WHERE a @@ '23|50';
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count
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-------
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403
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(1 row)
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SELECT count(*) from test__int WHERE a @> '{23,50}';
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count
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-------
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12
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(1 row)
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SELECT count(*) from test__int WHERE a @@ '23&50';
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count
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-------
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12
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(1 row)
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SELECT count(*) from test__int WHERE a @> '{20,23}';
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count
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-------
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12
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(1 row)
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SELECT count(*) from test__int WHERE a <@ '{73,23,20}';
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count
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-------
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10
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(1 row)
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SELECT count(*) from test__int WHERE a = '{73,23,20}';
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count
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-------
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1
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(1 row)
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SELECT count(*) from test__int WHERE a @@ '50&68';
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count
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-------
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9
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(1 row)
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SELECT count(*) from test__int WHERE a @> '{20,23}' or a @> '{50,68}';
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count
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-------
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21
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(1 row)
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SELECT count(*) from test__int WHERE a @@ '(20&23)|(50&68)';
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count
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-------
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21
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(1 row)
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SELECT count(*) from test__int WHERE a @@ '20 | !21';
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count
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-------
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6566
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(1 row)
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SELECT count(*) from test__int WHERE a @@ '!20 & !21';
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count
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-------
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6343
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(1 row)
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DROP INDEX text_idx;
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CREATE INDEX text_idx on test__int using gist (a gist__int_ops(numranges = 0));
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ERROR: value 0 out of bounds for option "numranges"
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DETAIL: Valid values are between "1" and "252".
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CREATE INDEX text_idx on test__int using gist (a gist__int_ops(numranges = 253));
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ERROR: value 253 out of bounds for option "numranges"
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DETAIL: Valid values are between "1" and "252".
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CREATE INDEX text_idx on test__int using gist (a gist__int_ops(numranges = 252));
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SELECT count(*) from test__int WHERE a && '{23,50}';
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count
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-------
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403
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(1 row)
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SELECT count(*) from test__int WHERE a @@ '23|50';
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count
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-------
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403
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(1 row)
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SELECT count(*) from test__int WHERE a @> '{23,50}';
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count
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-------
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12
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(1 row)
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SELECT count(*) from test__int WHERE a @@ '23&50';
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count
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-------
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12
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(1 row)
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SELECT count(*) from test__int WHERE a @> '{20,23}';
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count
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-------
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12
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(1 row)
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SELECT count(*) from test__int WHERE a <@ '{73,23,20}';
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count
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-------
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10
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(1 row)
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SELECT count(*) from test__int WHERE a = '{73,23,20}';
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count
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-------
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1
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(1 row)
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SELECT count(*) from test__int WHERE a @@ '50&68';
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count
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-------
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9
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(1 row)
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SELECT count(*) from test__int WHERE a @> '{20,23}' or a @> '{50,68}';
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count
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-------
|
|
21
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @@ '(20&23)|(50&68)';
|
|
count
|
|
-------
|
|
21
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @@ '20 | !21';
|
|
count
|
|
-------
|
|
6566
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @@ '!20 & !21';
|
|
count
|
|
-------
|
|
6343
|
|
(1 row)
|
|
|
|
DROP INDEX text_idx;
|
|
CREATE INDEX text_idx on test__int using gist (a gist__intbig_ops(siglen = 0));
|
|
ERROR: value 0 out of bounds for option "siglen"
|
|
DETAIL: Valid values are between "1" and "2024".
|
|
CREATE INDEX text_idx on test__int using gist (a gist__intbig_ops(siglen = 2025));
|
|
ERROR: value 2025 out of bounds for option "siglen"
|
|
DETAIL: Valid values are between "1" and "2024".
|
|
CREATE INDEX text_idx on test__int using gist (a gist__intbig_ops(siglen = 2024));
|
|
SELECT count(*) from test__int WHERE a && '{23,50}';
|
|
count
|
|
-------
|
|
403
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @@ '23|50';
|
|
count
|
|
-------
|
|
403
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @> '{23,50}';
|
|
count
|
|
-------
|
|
12
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @@ '23&50';
|
|
count
|
|
-------
|
|
12
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @> '{20,23}';
|
|
count
|
|
-------
|
|
12
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a <@ '{73,23,20}';
|
|
count
|
|
-------
|
|
10
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a = '{73,23,20}';
|
|
count
|
|
-------
|
|
1
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @@ '50&68';
|
|
count
|
|
-------
|
|
9
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @> '{20,23}' or a @> '{50,68}';
|
|
count
|
|
-------
|
|
21
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @@ '(20&23)|(50&68)';
|
|
count
|
|
-------
|
|
21
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @@ '20 | !21';
|
|
count
|
|
-------
|
|
6566
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @@ '!20 & !21';
|
|
count
|
|
-------
|
|
6343
|
|
(1 row)
|
|
|
|
DROP INDEX text_idx;
|
|
CREATE INDEX text_idx on test__int using gist ( a gist__intbig_ops );
|
|
SELECT count(*) from test__int WHERE a && '{23,50}';
|
|
count
|
|
-------
|
|
403
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @@ '23|50';
|
|
count
|
|
-------
|
|
403
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @> '{23,50}';
|
|
count
|
|
-------
|
|
12
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @@ '23&50';
|
|
count
|
|
-------
|
|
12
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @> '{20,23}';
|
|
count
|
|
-------
|
|
12
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a <@ '{73,23,20}';
|
|
count
|
|
-------
|
|
10
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a = '{73,23,20}';
|
|
count
|
|
-------
|
|
1
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @@ '50&68';
|
|
count
|
|
-------
|
|
9
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @> '{20,23}' or a @> '{50,68}';
|
|
count
|
|
-------
|
|
21
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @@ '(20&23)|(50&68)';
|
|
count
|
|
-------
|
|
21
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @@ '20 | !21';
|
|
count
|
|
-------
|
|
6566
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @@ '!20 & !21';
|
|
count
|
|
-------
|
|
6343
|
|
(1 row)
|
|
|
|
DROP INDEX text_idx;
|
|
CREATE INDEX text_idx on test__int using gin ( a gin__int_ops );
|
|
SELECT count(*) from test__int WHERE a && '{23,50}';
|
|
count
|
|
-------
|
|
403
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @@ '23|50';
|
|
count
|
|
-------
|
|
403
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @> '{23,50}';
|
|
count
|
|
-------
|
|
12
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @@ '23&50';
|
|
count
|
|
-------
|
|
12
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @> '{20,23}';
|
|
count
|
|
-------
|
|
12
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a <@ '{73,23,20}';
|
|
count
|
|
-------
|
|
10
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a = '{73,23,20}';
|
|
count
|
|
-------
|
|
1
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @@ '50&68';
|
|
count
|
|
-------
|
|
9
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @> '{20,23}' or a @> '{50,68}';
|
|
count
|
|
-------
|
|
21
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @@ '(20&23)|(50&68)';
|
|
count
|
|
-------
|
|
21
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @@ '20 | !21';
|
|
count
|
|
-------
|
|
6566
|
|
(1 row)
|
|
|
|
SELECT count(*) from test__int WHERE a @@ '!20 & !21';
|
|
count
|
|
-------
|
|
6343
|
|
(1 row)
|
|
|
|
RESET enable_seqscan;
|