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Commit911e702

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Implement operator class parameters
PostgreSQL provides set of template index access methods, where opclasses havemuch freedom in the semantics of indexing. These index AMs are GiST, GIN,SP-GiST and BRIN. There opclasses define representation of keys, operations onthem and supported search strategies. So, it's natural that opclasses may befaced some tradeoffs, which require user-side decision. This commit implementsopclass parameters allowing users to set some values, which tell opclass how toindex the particular dataset.This commit doesn't introduce new storage in system catalog. Instead it usespg_attribute.attoptions, which is used for table column storage options butunused for index attributes.In order to evade changing signature of each opclass support function, weimplement unified way to pass options to opclass support functions. Optionsare set to fn_expr as the constant bytea expression. It's possible due to thefact that opclass support functions are executed outside of expressions, sofn_expr is unused for them.This commit comes with some examples of opclass options usage. We parametrizesignature length in GiST. That applies to multiple opclasses: tsvector_ops,gist__intbig_ops, gist_ltree_ops, gist__ltree_ops, gist_trgm_ops andgist_hstore_ops. Also we parametrize maximum number of integer ranges forgist__int_ops. However, the main future usage of this feature is expectedto be json, where users would be able to specify which way to index particularjson parts.Catversion is bumped.Discussion:https://postgr.es/m/d22c3a18-31c7-1879-fc11-4c1ce2f5e5af%40postgrespro.ruAuthor: Nikita Glukhov, revised by meReviwed-by: Nikolay Shaplov, Robert Haas, Tom Lane, Tomas Vondra, Alvaro Herrera
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108 files changed

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lines changed

‎contrib/bloom/bloom.h

Lines changed: 2 additions & 1 deletion
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@@ -22,7 +22,8 @@
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/* Support procedures numbers */
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#defineBLOOM_HASH_PROC1
25-
#defineBLOOM_NPROC1
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#defineBLOOM_OPTIONS_PROC2
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#defineBLOOM_NPROC2
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/* Scan strategies */
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#defineBLOOM_EQUAL_STRATEGY1

‎contrib/bloom/blutils.c

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Original file line numberDiff line numberDiff line change
@@ -109,6 +109,7 @@ blhandler(PG_FUNCTION_ARGS)
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amroutine->amstrategies=BLOOM_NSTRATEGIES;
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amroutine->amsupport=BLOOM_NPROC;
112+
amroutine->amoptsprocnum=BLOOM_OPTIONS_PROC;
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amroutine->amcanorder= false;
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amroutine->amcanorderbyop= false;
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amroutine->amcanbackward= false;

‎contrib/bloom/blvalidate.c

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@@ -108,6 +108,9 @@ blvalidate(Oid opclassoid)
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ok=check_amproc_signature(procform->amproc,INT4OID, false,
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1,1,opckeytype);
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break;
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caseBLOOM_OPTIONS_PROC:
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ok=check_amoptsproc_signature(procform->amproc);
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break;
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default:
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ereport(INFO,
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(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
@@ -204,6 +207,8 @@ blvalidate(Oid opclassoid)
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if (opclassgroup&&
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(opclassgroup->functionset& (((uint64)1) <<i))!=0)
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continue;/* got it */
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if (i==BLOOM_OPTIONS_PROC)
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continue;/* optional method */
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ereport(INFO,
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(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
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errmsg("bloom opclass %s is missing support function %d",

‎contrib/hstore/Makefile

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@@ -11,6 +11,7 @@ OBJS = \
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EXTENSION = hstore
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DATA = hstore--1.4.sql\
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hstore--1.6--1.7.sql\
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hstore--1.5--1.6.sql\
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hstore--1.4--1.5.sql\
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hstore--1.3--1.4.sql hstore--1.2--1.3.sql\

‎contrib/hstore/expected/hstore.out

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@@ -1344,6 +1344,51 @@ select count(*) from testhstore where h ?& ARRAY['public','disabled'];
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42
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(1 row)
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drop index hidx;
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create index hidx on testhstore using gist(h gist_hstore_ops(siglen=0));
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ERROR: value 0 out of bounds for option "siglen"
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DETAIL: Valid values are between "1" and "2024".
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create index hidx on testhstore using gist(h gist_hstore_ops(siglen=2025));
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ERROR: value 2025 out of bounds for option "siglen"
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DETAIL: Valid values are between "1" and "2024".
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create index hidx on testhstore using gist(h gist_hstore_ops(siglen=2024));
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set enable_seqscan=off;
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select count(*) from testhstore where h @> 'wait=>NULL';
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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 testhstore where h @> 'wait=>CC';
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count
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-------
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15
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(1 row)
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select count(*) from testhstore where h @> 'wait=>CC, public=>t';
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count
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-------
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2
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(1 row)
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select count(*) from testhstore where h ? 'public';
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count
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-------
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194
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(1 row)
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select count(*) from testhstore where h ?| ARRAY['public','disabled'];
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count
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-------
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337
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(1 row)
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select count(*) from testhstore where h ?& ARRAY['public','disabled'];
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count
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-------
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42
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(1 row)
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drop index hidx;
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create index hidx on testhstore using gin (h);
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set enable_seqscan=off;

‎contrib/hstore/hstore--1.6--1.7.sql

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@@ -0,0 +1,12 @@
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/* contrib/hstore/hstore--1.6--1.7.sql*/
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-- complain if script is sourced in psql, rather than via ALTER EXTENSION
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\echo Use"ALTER EXTENSION hstore UPDATE TO '1.7'" to load this file. \quit
5+
6+
CREATEFUNCTIONghstore_options(internal)
7+
RETURNS void
8+
AS'MODULE_PATHNAME','ghstore_options'
9+
LANGUAGE C IMMUTABLE PARALLEL SAFE;
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11+
ALTEROPERATOR FAMILY gist_hstore_ops USING gist
12+
ADD FUNCTION10 (hstore) ghstore_options (internal);

‎contrib/hstore/hstore.control

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@@ -1,6 +1,6 @@
11
# hstore extension
22
comment = 'data type for storing sets of (key, value) pairs'
3-
default_version = '1.6'
3+
default_version = '1.7'
44
module_pathname = '$libdir/hstore'
55
relocatable = true
66
trusted = true

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