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Commit 92e100dd authored by Bruce Momjian's avatar Bruce Momjian
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Here is a patch that removes contrib/array, leaving only the README with 

some examples of the new syntax and a reference to the documentation.

Joe Conway.
parent d768cb26
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contrib/Makefile
View file @ 92e100dd
# $Header: /cvsroot/pgsql/contrib/Makefile,v 1.45 2003/07/24 16:54:58 tgl Exp $ # $Header: /cvsroot/pgsql/contrib/Makefile,v 1.46 2003/09/11 17:15:27 momjian Exp $
subdir = contrib subdir = contrib
top_builddir = .. top_builddir = ..
include $(top_builddir)/src/Makefile.global include $(top_builddir)/src/Makefile.global
WANTED_DIRS = \ WANTED_DIRS = \
array \
btree_gist \ btree_gist \
chkpass \ chkpass \
cube \ cube \
...@@ -44,6 +43,7 @@ WANTED_DIRS = \ ...@@ -44,6 +43,7 @@ WANTED_DIRS = \
vacuumlo vacuumlo
# Missing: # Missing:
# array \ (removed all but the README)
# adddepend \ (does not have a makefile) # adddepend \ (does not have a makefile)
# ipc_check \ (does not have a makefile) # ipc_check \ (does not have a makefile)
# mSQL-interface \ (requires msql installed) # mSQL-interface \ (requires msql installed)
......
contrib/array/Makefile deleted 100644 → 0
View file @ d768cb26
# $Header: /cvsroot/pgsql/contrib/array/Attic/Makefile,v 1.16 2001/09/06 10:49:29 petere Exp $
subdir = contrib/array
top_builddir = ../..
include $(top_builddir)/src/Makefile.global
MODULES = array_iterator
DATA_built = array_iterator.sql
DOCS = README.array_iterator
include $(top_srcdir)/contrib/contrib-global.mk
contrib/array/README.array_iterator
View file @ 92e100dd
Array iterator functions, by Massimo Dal Zotto <dz@cs.unitn.it> Array iterator functions have been removed as of PostgreSQL 7.4, because
Copyright (C) 1999, Massimo Dal Zotto <dz@cs.unitn.it> equivalent functionality is now available built in to the backend.
This software is distributed under the GNU General Public License For example, previously, using contrib/array, you might have used the
either version 2, or (at your option) any later version. following construct:
create table t(id int4[], txt text[]);
This loadable module defines a new class of functions which take -- select tuples with some id element equal to 123
an array and a scalar value, iterate a scalar operator over the select * from t where t.id *= 123;
elements of the array and the value, and compute a result as
the logical OR or AND of the iteration results.
For example array_int4eq returns true if some of the elements
of an array of int4 is equal to the given value:
array_int4eq({1,2,3}, 1) --> true Now you would do this instead:
array_int4eq({1,2,3}, 4) --> false
If we have defined T array types and O scalar operators we can -- select tuples with some id element equal to 123
define T x O x 2 array functions, each of them has a name like select * from t where 123 = any (t.id);
"array_[all_]<basetype><operation>" and takes an array of type T
iterating the operator O over all the elements. Note however
that some of the possible combination are invalid, for example
the array_int4_like because there is no like operator for int4.
We can then define new operators based on these functions and use -- or you could also do this
them to write queries with qualification clauses based on the select * from t where 123 = some (t.id);
values of some of the elements of an array.
For example to select rows having some or all element of an array
attribute equal to a given value or matching a regular expression:
create table t(id int4[], txt text[]); Similarly, if using contrib/array, you did the following:
-- select tuples with some id element equal to 123 -- select tuples with all txt elements matching '^[A-Z]'
select * from t where t.id *= 123; select * from t where t.txt[1:3] **~ '^[A-Z]';
-- select tuples with some txt element matching '[a-z]' Now do this instead:
select * from t where t.txt *~ '[a-z]';
-- select tuples with all txt elements matching '^[A-Z]' -- select tuples with all txt elements matching '^[A-Z]'
select * from t where t.txt[1:3] **~ '^[A-Z]'; select * from t where '^[A-Z]' ~ all (t.txt[1:3]);
The scheme is quite general, each operator which operates on a base type See the related section in the online documentation for more detail:
can be iterated over the elements of an array. It seem to work well but Table of Contents => Functions and Operators => Row and Array Comparisons
defining each new operator requires writing a different C function.
This is tedious, and error-prone since one must take care that the correct
datatypes are associated with the selected underlying function.
Can anyone suggest a better and more portable way to do it ?
See also array_iterator.sql for an example on how to use this module.
contrib/array/array_iterator.c deleted 100644 → 0
View file @ d768cb26
/*
* array_iterator.c --
*
* This file defines a new class of operators which take an
* array and a scalar value, iterate a scalar operator over the
* elements of the array and the value and compute a result as
* the logical OR or AND of the iteration results.
*
* Copyright (C) 1999, Massimo Dal Zotto <dz@cs.unitn.it>
* ported to postgreSQL 6.3.2,added oid_functions, 18.1.1999,
* Tobias Gabele <gabele@wiz.uni-kassel.de>
*
* This software is distributed under the GNU General Public License
* either version 2, or (at your option) any later version.
*/
#include "postgres.h"
#include <ctype.h>
#include <stdio.h>
#include <sys/types.h>
#include <string.h>
#include "access/tupmacs.h"
#include "access/xact.h"
#include "fmgr.h"
#include "miscadmin.h"
#include "utils/array.h"
#include "utils/builtins.h"
#include "utils/fmgroids.h"
#include "utils/memutils.h"
#include "utils/lsyscache.h"
#include "array_iterator.h"
static int32
array_iterator(Oid proc, int and, ArrayType *array, Datum value)
{
Oid elemtype;
int16 typlen;
bool typbyval;
char typalign;
int nitems,
i;
Datum result;
int ndim,
*dim;
char *p;
FmgrInfo finfo;
/* Sanity checks */
if (array == (ArrayType *) NULL)
{
/* elog(WARNING, "array_iterator: array is null"); */
return (0);
}
/* detoast input if necessary */
array = DatumGetArrayTypeP(PointerGetDatum(array));
ndim = ARR_NDIM(array);
dim = ARR_DIMS(array);
nitems = ArrayGetNItems(ndim, dim);
if (nitems == 0)
return (0);
/* Lookup element type information */
elemtype = ARR_ELEMTYPE(array);
get_typlenbyvalalign(elemtype, &typlen, &typbyval, &typalign);
/* Lookup the function entry point */
fmgr_info(proc, &finfo);
if (finfo.fn_nargs != 2)
{
elog(ERROR, "array_iterator: proc %u does not take 2 args", proc);
return (0);
}
/* Scan the array and apply the operator to each element */
result = BoolGetDatum(false);
p = ARR_DATA_PTR(array);
for (i = 0; i < nitems; i++)
{
Datum itemvalue;
itemvalue = fetch_att(p, typbyval, typlen);
p = att_addlength(p, typlen, PointerGetDatum(p));
p = (char *) att_align(p, typalign);
result = FunctionCall2(&finfo, itemvalue, value);
if (DatumGetBool(result))
{
if (!and)
return (1);
}
else
{
if (and)
return (0);
}
}
if (and && DatumGetBool(result))
return (1);
else
return (0);
}
/*
* Iterator functions for type _text
*/
int32
array_texteq(ArrayType *array, void *value)
{
return array_iterator(F_TEXTEQ,
0, /* logical or */
array, (Datum) value);
}
int32
array_all_texteq(ArrayType *array, void *value)
{
return array_iterator(F_TEXTEQ,
1, /* logical and */
array, (Datum) value);
}
int32
array_textregexeq(ArrayType *array, void *value)
{
return array_iterator(F_TEXTREGEXEQ,
0, /* logical or */
array, (Datum) value);
}
int32
array_all_textregexeq(ArrayType *array, void *value)
{
return array_iterator(F_TEXTREGEXEQ,
1, /* logical and */
array, (Datum) value);
}
/*
* Iterator functions for type _bpchar. Note that the regexp
* operators take the second argument of type text.
*/
int32
array_bpchareq(ArrayType *array, void *value)
{
return array_iterator(F_BPCHAREQ,
0, /* logical or */
array, (Datum) value);
}
int32
array_all_bpchareq(ArrayType *array, void *value)
{
return array_iterator(F_BPCHAREQ,
1, /* logical and */
array, (Datum) value);
}
int32
array_bpcharregexeq(ArrayType *array, void *value)
{
return array_iterator(F_TEXTREGEXEQ,
0, /* logical or */
array, (Datum) value);
}
int32
array_all_bpcharregexeq(ArrayType *array, void *value)
{
return array_iterator(F_TEXTREGEXEQ,
1, /* logical and */
array, (Datum) value);
}
/*
* Iterator functions for type _int4
*/
int32
array_int4eq(ArrayType *array, int4 value)
{
return array_iterator(F_INT4EQ,
0, /* logical or */
array, (Datum) value);
}
int32
array_all_int4eq(ArrayType *array, int4 value)
{
return array_iterator(F_INT4EQ,
1, /* logical and */
array, (Datum) value);
}
int32
array_int4ne(ArrayType *array, int4 value)
{
return array_iterator(F_INT4NE,
0, /* logical or */
array, (Datum) value);
}
int32
array_all_int4ne(ArrayType *array, int4 value)
{
return array_iterator(F_INT4NE,
1, /* logical and */
array, (Datum) value);
}
int32
array_int4gt(ArrayType *array, int4 value)
{
return array_iterator(F_INT4GT,
0, /* logical or */
array, (Datum) value);
}
int32
array_all_int4gt(ArrayType *array, int4 value)
{
return array_iterator(F_INT4GT,
1, /* logical and */
array, (Datum) value);
}
int32
array_int4ge(ArrayType *array, int4 value)
{
return array_iterator(F_INT4GE,
0, /* logical or */
array, (Datum) value);
}
int32
array_all_int4ge(ArrayType *array, int4 value)
{
return array_iterator(F_INT4GE,
1, /* logical and */
array, (Datum) value);
}
int32
array_int4lt(ArrayType *array, int4 value)
{
return array_iterator(F_INT4LT,
0, /* logical or */
array, (Datum) value);
}
int32
array_all_int4lt(ArrayType *array, int4 value)
{
return array_iterator(F_INT4LT,
1, /* logical and */
array, (Datum) value);
}
int32
array_int4le(ArrayType *array, int4 value)
{
return array_iterator(F_INT4LE,
0, /* logical or */
array, (Datum) value);
}
int32
array_all_int4le(ArrayType *array, int4 value)
{
return array_iterator(F_INT4LE,
1, /* logical and */
array, (Datum) value);
}
/* new tobias gabele 1999 */
int32
array_oideq(ArrayType *array, Oid value)
{
return array_iterator(F_OIDEQ,
0, /* logical or */
array, (Datum) value);
}
int32
array_all_oidne(ArrayType *array, Oid value)
{
return array_iterator(F_OIDNE,
1, /* logical and */
array, (Datum) value);
}
int32
array_ineteq(ArrayType *array, void *value)
{
return array_iterator(F_NETWORK_EQ,
0, /* logical or */
array, (Datum) value);
}
int32
array_all_ineteq(ArrayType *array, void *value)
{
return array_iterator(F_NETWORK_EQ,
1, /* logical and */
array, (Datum) value);
}
int32
array_inetne(ArrayType *array, void *value)
{
return array_iterator(F_NETWORK_NE,
0, /* logical and */
array, (Datum) value);
}
int32
array_all_inetne(ArrayType *array, void *value)
{
return array_iterator(F_NETWORK_NE,
1, /* logical and */
array, (Datum) value);
}
contrib/array/array_iterator.h deleted 100644 → 0
View file @ d768cb26
#ifndef ARRAY_ITERATOR_H
#define ARRAY_ITERATOR_H
static int32 array_iterator(Oid proc, int and,
ArrayType *array, Datum value);
int32 array_texteq(ArrayType *array, void *value);
int32 array_all_texteq(ArrayType *array, void *value);
int32 array_textregexeq(ArrayType *array, void *value);
int32 array_all_textregexeq(ArrayType *array, void *value);
int32 array_bpchareq(ArrayType *array, void *value);
int32 array_all_bpchareq(ArrayType *array, void *value);
int32 array_bpcharregexeq(ArrayType *array, void *value);
int32 array_all_bpcharregexeq(ArrayType *array, void *value);
int32 array_int4eq(ArrayType *array, int4 value);
int32 array_all_int4eq(ArrayType *array, int4 value);
int32 array_int4ne(ArrayType *array, int4 value);
int32 array_all_int4ne(ArrayType *array, int4 value);
int32 array_int4gt(ArrayType *array, int4 value);
int32 array_all_int4gt(ArrayType *array, int4 value);
int32 array_int4ge(ArrayType *array, int4 value);
int32 array_all_int4ge(ArrayType *array, int4 value);
int32 array_int4lt(ArrayType *array, int4 value);
int32 array_all_int4lt(ArrayType *array, int4 value);
int32 array_int4le(ArrayType *array, int4 value);
int32 array_all_int4le(ArrayType *array, int4 value);
int32 array_oideq(ArrayType *array, Oid value);
int32 array_all_oidne(ArrayType *array, Oid value);
int32 array_ineteq(ArrayType *array, void *value);
int32 array_all_ineteq(ArrayType *array, void *value);
int32 array_inetne(ArrayType *array, void *value);
int32 array_all_inetne(ArrayType *array, void *value);
#endif
contrib/array/array_iterator.sql.in deleted 100644 → 0
View file @ d768cb26
-- SQL code to define the new array iterator functions and operators
-- define the array operators *=, **=, *~ and **~ for type _text
--
-- Adjust this setting to control where the objects get created.
SET search_path = public;
CREATE OR REPLACE FUNCTION array_texteq(_text, text)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
CREATE OR REPLACE FUNCTION array_all_texteq(_text, text)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
CREATE OR REPLACE FUNCTION array_textregexeq(_text, text)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
CREATE OR REPLACE FUNCTION array_all_textregexeq(_text, text)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
DROP OPERATOR *=(_text,text);
CREATE OPERATOR *= (
LEFTARG=_text,
RIGHTARG=text,
PROCEDURE=array_texteq
);
DROP OPERATOR **=(_text,text);
CREATE OPERATOR **= (
LEFTARG=_text,
RIGHTARG=text,
PROCEDURE=array_all_texteq
);
DROP OPERATOR *~(_text,text);
CREATE OPERATOR *~ (
LEFTARG=_text,
RIGHTARG=text,
PROCEDURE=array_textregexeq
);
DROP OPERATOR **~(_text,text);
CREATE OPERATOR **~ (
LEFTARG=_text,
RIGHTARG=text,
PROCEDURE=array_all_textregexeq
);
-- define the array operators *=, **=, *~ and **~ for type _bpchar
--
CREATE OR REPLACE FUNCTION array_bpchareq(_bpchar, bpchar)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
CREATE OR REPLACE FUNCTION array_all_bpchareq(_bpchar, bpchar)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
CREATE OR REPLACE FUNCTION array_bpcharregexeq(_bpchar, bpchar)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
CREATE OR REPLACE FUNCTION array_all_bpcharregexeq(_bpchar, bpchar)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
DROP OPERATOR *=(_bpchar,bpchar);
CREATE OPERATOR *= (
LEFTARG=_bpchar,
RIGHTARG=bpchar,
PROCEDURE=array_bpchareq
);
DROP OPERATOR **=(_bpchar,bpchar);
CREATE OPERATOR **= (
LEFTARG=_bpchar,
RIGHTARG=bpchar,
PROCEDURE=array_all_bpchareq
);
DROP OPERATOR *~(_bpchar,bpchar);
CREATE OPERATOR *~ (
LEFTARG=_bpchar,
RIGHTARG=bpchar,
PROCEDURE=array_bpcharregexeq
);
DROP OPERATOR **~(_bpchar,bpchar);
CREATE OPERATOR **~ (
LEFTARG=_bpchar,
RIGHTARG=bpchar,
PROCEDURE=array_all_bpcharregexeq
);
-- define the array operators *=, **=, *> and **> for type _int4
--
CREATE OR REPLACE FUNCTION array_int4eq(_int4, int4)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
CREATE OR REPLACE FUNCTION array_all_int4eq(_int4, int4)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
CREATE OR REPLACE FUNCTION array_int4ne(_int4, int4)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
CREATE OR REPLACE FUNCTION array_all_int4ne(_int4, int4)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
CREATE OR REPLACE FUNCTION array_int4gt(_int4, int4)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
CREATE OR REPLACE FUNCTION array_all_int4gt(_int4, int4)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
CREATE OR REPLACE FUNCTION array_int4ge(_int4, int4)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
CREATE OR REPLACE FUNCTION array_all_int4ge(_int4, int4)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
CREATE OR REPLACE FUNCTION array_int4lt(_int4, int4)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
CREATE OR REPLACE FUNCTION array_all_int4lt(_int4, int4)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
CREATE OR REPLACE FUNCTION array_int4le(_int4, int4)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
CREATE OR REPLACE FUNCTION array_all_int4le(_int4, int4)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
DROP OPERATOR *=(_int4,int4);
CREATE OPERATOR *= (
LEFTARG=_int4,
RIGHTARG=int4,
PROCEDURE=array_int4eq
);
DROP OPERATOR **=(_int4,int4);
CREATE OPERATOR **= (
LEFTARG=_int4,
RIGHTARG=int4,
PROCEDURE=array_all_int4eq
);
DROP OPERATOR *<>(_int4,int4);
CREATE OPERATOR *<> (
LEFTARG=_int4,
RIGHTARG=int4,
PROCEDURE=array_int4ne
);
DROP OPERATOR **<>(_int4,int4);
CREATE OPERATOR **<> (
LEFTARG=_int4,
RIGHTARG=int4,
PROCEDURE=array_all_int4ne
);
DROP OPERATOR *>(_int4,int4);
CREATE OPERATOR *> (
LEFTARG=_int4,
RIGHTARG=int4,
PROCEDURE=array_int4gt
);
DROP OPERATOR **>(_int4,int4);
CREATE OPERATOR **> (
LEFTARG=_int4,
RIGHTARG=int4,
PROCEDURE=array_all_int4gt
);
DROP OPERATOR *>=(_int4,int4);
CREATE OPERATOR *>= (
LEFTARG=_int4,
RIGHTARG=int4,
PROCEDURE=array_int4ge
);
DROP OPERATOR **>=(_int4,int4);
CREATE OPERATOR **>= (
LEFTARG=_int4,
RIGHTARG=int4,
PROCEDURE=array_all_int4ge
);
DROP OPERATOR *<(_int4,int4);
CREATE OPERATOR *< (
LEFTARG=_int4,
RIGHTARG=int4,
PROCEDURE=array_int4lt
);
DROP OPERATOR **<(_int4,int4);
CREATE OPERATOR **< (
LEFTARG=_int4,
RIGHTARG=int4,
PROCEDURE=array_all_int4lt
);
DROP OPERATOR *<=(_int4,int4);
CREATE OPERATOR *<= (
LEFTARG=_int4,
RIGHTARG=int4,
PROCEDURE=array_int4le
);
DROP OPERATOR **<=(_int4,int4);
CREATE OPERATOR **<= (
LEFTARG=_int4,
RIGHTARG=int4,
PROCEDURE=array_all_int4le
);
-- define the array operators *=, **<> for type _oid (added tobias 1. 1999)
--
CREATE OR REPLACE FUNCTION array_oideq(_oid, oid)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
CREATE OR REPLACE FUNCTION array_all_oidne(_oid, oid)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
DROP OPERATOR *=(_oid,oid);
CREATE OPERATOR *= (
LEFTARG=_oid,
RIGHTARG=oid,
PROCEDURE=array_oideq
);
DROP OPERATOR **<>(_oid,oid);
CREATE OPERATOR **<> (
LEFTARG=_oid,
RIGHTARG=oid,
PROCEDURE=array_all_oidne
);
-- define the array operators *=, **=, *<>, **<> for type _inet
CREATE OR REPLACE FUNCTION array_ineteq(_inet, inet)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
CREATE OR REPLACE FUNCTION array_all_ineteq(_inet, inet)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
CREATE OR REPLACE FUNCTION array_inetne(_inet, inet)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
CREATE OR REPLACE FUNCTION array_all_inetne(_inet, inet)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'C' IMMUTABLE STRICT;
DROP OPERATOR *=(_inet,inet);
CREATE OPERATOR *= (
LEFTARG=_inet,
RIGHTARG=inet,
PROCEDURE=array_ineteq
);
DROP OPERATOR **=(_inet,inet);
CREATE OPERATOR **= (
LEFTARG=_inet,
RIGHTARG=inet,
PROCEDURE=array_all_ineteq
);
DROP OPERATOR *<>(_inet,inet);
CREATE OPERATOR *<> (
LEFTARG=_inet,
RIGHTARG=inet,
PROCEDURE=array_inetne
);
DROP OPERATOR **<>(_inet,inet);
CREATE OPERATOR **<> (
LEFTARG=_inet,
RIGHTARG=inet,
PROCEDURE=array_all_inetne
);
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