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blanks, in hopes of reducing the surprise factor for newbies. Remove redundant operators for VARCHAR (it depends wholly on TEXT operations now). Clean up resolution of ambiguous operators/functions to avoid surprising choices for domains: domains are treated as equivalent to their base types and binary-coercibility is no longer considered a preference item when choosing among multiple operators/functions. IsBinaryCoercible now correctly reflects the notion that you need *only* relabel the type to get from type A to type B: that is, a domain is binary-coercible to its base type, but not vice versa. Various marginal cleanup, including merging the essentially duplicate resolution code in parse_func.c and parse_oper.c. Improve opr_sanity regression test to understand about binary compatibility (using pg_cast), and fix a couple of small errors in the catalogs revealed thereby. Restructure "special operator" handling to fetch operators via index opclasses rather than hardwiring assumptions about names (cleans up the pattern_ops stuff a little).
334 lines
6.4 KiB
C
334 lines
6.4 KiB
C
/*
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* array_iterator.c --
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*
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* This file defines a new class of operators which take an
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* array and a scalar value, iterate a scalar operator over the
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* elements of the array and the value and compute a result as
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* the logical OR or AND of the iteration results.
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*
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* Copyright (C) 1999, Massimo Dal Zotto <dz@cs.unitn.it>
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* ported to postgreSQL 6.3.2,added oid_functions, 18.1.1999,
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* Tobias Gabele <gabele@wiz.uni-kassel.de>
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*
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* This software is distributed under the GNU General Public License
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* either version 2, or (at your option) any later version.
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*/
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#include "postgres.h"
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#include <ctype.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include <string.h>
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#include "access/tupmacs.h"
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#include "access/xact.h"
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#include "fmgr.h"
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#include "miscadmin.h"
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#include "utils/array.h"
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#include "utils/builtins.h"
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#include "utils/fmgroids.h"
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#include "utils/memutils.h"
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#include "utils/lsyscache.h"
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#include "array_iterator.h"
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static int32
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array_iterator(Oid proc, int and, ArrayType *array, Datum value)
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{
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Oid elemtype;
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int16 typlen;
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bool typbyval;
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char typalign;
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int nitems,
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i;
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Datum result;
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int ndim,
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*dim;
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char *p;
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FmgrInfo finfo;
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/* Sanity checks */
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if (array == (ArrayType *) NULL)
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{
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/* elog(WARNING, "array_iterator: array is null"); */
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return (0);
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}
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/* detoast input if necessary */
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array = DatumGetArrayTypeP(PointerGetDatum(array));
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ndim = ARR_NDIM(array);
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dim = ARR_DIMS(array);
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nitems = ArrayGetNItems(ndim, dim);
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if (nitems == 0)
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return (0);
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/* Lookup element type information */
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elemtype = ARR_ELEMTYPE(array);
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get_typlenbyvalalign(elemtype, &typlen, &typbyval, &typalign);
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/* Lookup the function entry point */
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fmgr_info(proc, &finfo);
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if (finfo.fn_nargs != 2)
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{
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elog(ERROR, "array_iterator: proc %u does not take 2 args", proc);
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return (0);
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}
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/* Scan the array and apply the operator to each element */
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result = BoolGetDatum(false);
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p = ARR_DATA_PTR(array);
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for (i = 0; i < nitems; i++)
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{
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Datum itemvalue;
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itemvalue = fetch_att(p, typbyval, typlen);
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p = att_addlength(p, typlen, PointerGetDatum(p));
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p = (char *) att_align(p, typalign);
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result = FunctionCall2(&finfo, itemvalue, value);
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if (DatumGetBool(result))
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{
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if (!and)
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return (1);
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}
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else
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{
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if (and)
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return (0);
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}
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}
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if (and && DatumGetBool(result))
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return (1);
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else
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return (0);
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}
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/*
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* Iterator functions for type _text
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*/
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int32
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array_texteq(ArrayType *array, void *value)
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{
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return array_iterator(F_TEXTEQ,
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0, /* logical or */
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array, (Datum) value);
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}
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int32
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array_all_texteq(ArrayType *array, void *value)
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{
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return array_iterator(F_TEXTEQ,
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1, /* logical and */
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array, (Datum) value);
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}
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int32
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array_textregexeq(ArrayType *array, void *value)
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{
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return array_iterator(F_TEXTREGEXEQ,
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0, /* logical or */
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array, (Datum) value);
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}
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int32
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array_all_textregexeq(ArrayType *array, void *value)
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{
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return array_iterator(F_TEXTREGEXEQ,
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1, /* logical and */
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array, (Datum) value);
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}
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/*
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* Iterator functions for type _bpchar. Note that the regexp
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* operators take the second argument of type text.
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*/
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int32
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array_bpchareq(ArrayType *array, void *value)
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{
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return array_iterator(F_BPCHAREQ,
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0, /* logical or */
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array, (Datum) value);
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}
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int32
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array_all_bpchareq(ArrayType *array, void *value)
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{
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return array_iterator(F_BPCHAREQ,
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1, /* logical and */
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array, (Datum) value);
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}
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int32
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array_bpcharregexeq(ArrayType *array, void *value)
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{
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return array_iterator(F_TEXTREGEXEQ,
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0, /* logical or */
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array, (Datum) value);
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}
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int32
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array_all_bpcharregexeq(ArrayType *array, void *value)
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{
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return array_iterator(F_TEXTREGEXEQ,
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1, /* logical and */
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array, (Datum) value);
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}
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/*
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* Iterator functions for type _int4
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*/
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int32
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array_int4eq(ArrayType *array, int4 value)
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{
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return array_iterator(F_INT4EQ,
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0, /* logical or */
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array, (Datum) value);
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}
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int32
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array_all_int4eq(ArrayType *array, int4 value)
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{
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return array_iterator(F_INT4EQ,
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1, /* logical and */
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array, (Datum) value);
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}
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int32
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array_int4ne(ArrayType *array, int4 value)
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{
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return array_iterator(F_INT4NE,
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0, /* logical or */
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array, (Datum) value);
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}
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int32
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array_all_int4ne(ArrayType *array, int4 value)
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{
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return array_iterator(F_INT4NE,
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1, /* logical and */
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array, (Datum) value);
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}
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int32
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array_int4gt(ArrayType *array, int4 value)
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{
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return array_iterator(F_INT4GT,
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0, /* logical or */
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array, (Datum) value);
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}
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int32
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array_all_int4gt(ArrayType *array, int4 value)
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{
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return array_iterator(F_INT4GT,
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1, /* logical and */
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array, (Datum) value);
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}
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int32
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array_int4ge(ArrayType *array, int4 value)
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{
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return array_iterator(F_INT4GE,
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0, /* logical or */
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array, (Datum) value);
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}
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int32
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array_all_int4ge(ArrayType *array, int4 value)
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{
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return array_iterator(F_INT4GE,
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1, /* logical and */
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array, (Datum) value);
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}
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int32
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array_int4lt(ArrayType *array, int4 value)
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{
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return array_iterator(F_INT4LT,
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0, /* logical or */
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array, (Datum) value);
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}
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int32
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array_all_int4lt(ArrayType *array, int4 value)
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{
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return array_iterator(F_INT4LT,
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1, /* logical and */
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array, (Datum) value);
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}
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int32
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array_int4le(ArrayType *array, int4 value)
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{
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return array_iterator(F_INT4LE,
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0, /* logical or */
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array, (Datum) value);
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}
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int32
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array_all_int4le(ArrayType *array, int4 value)
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{
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return array_iterator(F_INT4LE,
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1, /* logical and */
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array, (Datum) value);
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}
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/* new tobias gabele 1999 */
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int32
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array_oideq(ArrayType *array, Oid value)
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{
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return array_iterator(F_OIDEQ,
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0, /* logical or */
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array, (Datum) value);
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}
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int32
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array_all_oidne(ArrayType *array, Oid value)
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{
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return array_iterator(F_OIDNE,
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1, /* logical and */
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array, (Datum) value);
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}
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int32
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array_ineteq(ArrayType *array, void *value)
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{
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return array_iterator(F_NETWORK_EQ,
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0, /* logical or */
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array, (Datum) value);
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}
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int32
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array_all_ineteq(ArrayType *array, void *value)
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{
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return array_iterator(F_NETWORK_EQ,
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1, /* logical and */
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array, (Datum) value);
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}
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int32
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array_inetne(ArrayType *array, void *value)
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{
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return array_iterator(F_NETWORK_NE,
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0, /* logical and */
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array, (Datum) value);
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}
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int32
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array_all_inetne(ArrayType *array, void *value)
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{
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return array_iterator(F_NETWORK_NE,
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1, /* logical and */
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array, (Datum) value);
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}
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