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robertmhaasrobertmhaas
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Add to_regprocedure() and to_regoperator().
These are natural complements to the functions added by commit 0886fc6, but they weren't included in the original patch for some reason. Add them. Patch by me, per a complaint by Tom Lane. Review by Tatsuo Ishii.
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7 files changed

+199
-5
lines changed

7 files changed

+199
-5
lines changed

‎doc/src/sgml/func.sgml‎

Lines changed: 24 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -15293,10 +15293,18 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
1529315293
<primary>to_regproc</primary>
1529415294
</indexterm>
1529515295

15296+
<indexterm>
15297+
<primary>to_regprocedure</primary>
15298+
</indexterm>
15299+
1529615300
<indexterm>
1529715301
<primary>to_regoper</primary>
1529815302
</indexterm>
1529915303

15304+
<indexterm>
15305+
<primary>to_regoperator</primary>
15306+
</indexterm>
15307+
1530015308
<indexterm>
1530115309
<primary>to_regtype</primary>
1530215310
</indexterm>
@@ -15481,11 +15489,21 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
1548115489
<entry><type>regproc</type></entry>
1548215490
<entry>get the oid of the named function</entry>
1548315491
</row>
15492+
<row>
15493+
<entry><literal><function>to_regprocedure(<parameter>func_name</parameter>)</function></literal></entry>
15494+
<entry><type>regprocedure</type></entry>
15495+
<entry>get the oid of the named function</entry>
15496+
</row>
1548415497
<row>
1548515498
<entry><literal><function>to_regoper(<parameter>operator_name</parameter>)</function></literal></entry>
1548615499
<entry><type>regoper</type></entry>
1548715500
<entry>get the oid of the named operator</entry>
1548815501
</row>
15502+
<row>
15503+
<entry><literal><function>to_regoperator(<parameter>operator_name</parameter>)</function></literal></entry>
15504+
<entry><type>regoperator</type></entry>
15505+
<entry>get the oid of the named operator</entry>
15506+
</row>
1548915507
<row>
1549015508
<entry><literal><function>to_regtype(<parameter>type_name</parameter>)</function></literal></entry>
1549115509
<entry><type>regtype</type></entry>
@@ -15658,10 +15676,12 @@ SELECT collation for ('foo' COLLATE "de_DE");
1565815676

1565915677
<para>
1566015678
The <function>to_regclass</function>, <function>to_regproc</function>,
15661-
<function>to_regoper</function> and <function>to_regtype</function>
15662-
translate relation, function, operator, and type names to objects of
15663-
type <type>regclass</>, <type>regproc</>, <type>regoper</> and
15664-
<type>regtype</>, respectively. These functions differ from a cast from
15679+
<function>to_regprocedure</function>, <function>to_regoper</function>,
15680+
<function>to_regoperator</function>, and <function>to_regtype</function>
15681+
functions translate relation, function, operator, and type names to objects
15682+
of type <type>regclass</>, <type>regproc</>, <type>regprocedure</type>,
15683+
<type>regoper</>, <type>regoperator</type>, and <type>regtype</>,
15684+
respectively. These functions differ from a cast from
1566515685
text in that they don't accept a numeric OID, and that they return null
1566615686
rather than throwing an error if the name is not found (or, for
1566715687
<function>to_regproc</function> and <function>to_regoper</function>, if

‎src/backend/utils/adt/regproc.c‎

Lines changed: 71 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -322,6 +322,38 @@ regprocedurein(PG_FUNCTION_ARGS)
322322
PG_RETURN_OID(result);
323323
}
324324

325+
/*
326+
* to_regprocedure - converts "proname(args)" to proc OID
327+
*
328+
* If the name is not found, we return NULL.
329+
*/
330+
Datum
331+
to_regprocedure(PG_FUNCTION_ARGS)
332+
{
333+
char *pro_name = PG_GETARG_CSTRING(0);
334+
List *names;
335+
int nargs;
336+
Oid argtypes[FUNC_MAX_ARGS];
337+
FuncCandidateList clist;
338+
339+
/*
340+
* Parse the name and arguments, look up potential matches in the current
341+
* namespace search list, and scan to see which one exactly matches the
342+
* given argument types. (There will not be more than one match.)
343+
*/
344+
parseNameAndArgTypes(pro_name, false, &names, &nargs, argtypes);
345+
346+
clist = FuncnameGetCandidates(names, nargs, NIL, false, false, true);
347+
348+
for (; clist; clist = clist->next)
349+
{
350+
if (memcmp(clist->args, argtypes, nargs * sizeof(Oid)) == 0)
351+
PG_RETURN_OID(clist->oid);
352+
}
353+
354+
PG_RETURN_NULL();
355+
}
356+
325357
/*
326358
* format_procedure - converts proc OID to "pro_name(args)"
327359
*
@@ -721,6 +753,45 @@ regoperatorin(PG_FUNCTION_ARGS)
721753
PG_RETURN_OID(result);
722754
}
723755

756+
/*
757+
* to_regoperator - converts "oprname(args)" to operator OID
758+
*
759+
* If the name is not found, we return NULL.
760+
*/
761+
Datum
762+
to_regoperator(PG_FUNCTION_ARGS)
763+
{
764+
char *opr_name_or_oid = PG_GETARG_CSTRING(0);
765+
Oid result;
766+
List *names;
767+
int nargs;
768+
Oid argtypes[FUNC_MAX_ARGS];
769+
770+
/*
771+
* Parse the name and arguments, look up potential matches in the current
772+
* namespace search list, and scan to see which one exactly matches the
773+
* given argument types. (There will not be more than one match.)
774+
*/
775+
parseNameAndArgTypes(opr_name_or_oid, true, &names, &nargs, argtypes);
776+
if (nargs == 1)
777+
ereport(ERROR,
778+
(errcode(ERRCODE_UNDEFINED_PARAMETER),
779+
errmsg("missing argument"),
780+
errhint("Use NONE to denote the missing argument of a unary operator.")));
781+
if (nargs != 2)
782+
ereport(ERROR,
783+
(errcode(ERRCODE_TOO_MANY_ARGUMENTS),
784+
errmsg("too many arguments"),
785+
errhint("Provide two argument types for operator.")));
786+
787+
result = OpernameGetOprid(names, argtypes[0], argtypes[1]);
788+
789+
if (!OidIsValid(result))
790+
PG_RETURN_NULL();
791+
792+
PG_RETURN_OID(result);
793+
}
794+
724795
/*
725796
* format_operator - converts operator OID to "opr_name(args)"
726797
*

‎src/include/catalog/catversion.h‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -53,6 +53,6 @@
5353
*/
5454

5555
/* yyyymmddN */
56-
#define CATALOG_VERSION_NO 201404123
56+
#define CATALOG_VERSION_NO 201404161
5757

5858
#endif

‎src/include/catalog/pg_proc.h‎

Lines changed: 4 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -175,6 +175,8 @@ DATA(insert OID = 45 ( regprocout PGNSP PGUID 12 1 0 0 0 f f f f t f s 1 0
175175
DESCR("I/O");
176176
DATA(insert OID = 3494 ( to_regproc PGNSP PGUID 12 1 0 0 0 f f f f t f s 1 0 24 "2275" _null_ _null_ _null_ _null_ to_regproc _null_ _null_ _null_ ));
177177
DESCR("convert proname to regproc");
178+
DATA(insert OID = 3479 ( to_regprocedure PGNSP PGUID 12 1 0 0 0 f f f f t f s 1 0 2202 "2275" _null_ _null_ _null_ _null_ to_regprocedure _null_ _null_ _null_ ));
179+
DESCR("convert proname to regprocedure");
178180
DATA(insert OID = 46 ( textin PGNSP PGUID 12 1 0 0 0 f f f f t f i 1 0 25 "2275" _null_ _null_ _null_ _null_ textin _null_ _null_ _null_ ));
179181
DESCR("I/O");
180182
DATA(insert OID = 47 ( textout PGNSP PGUID 12 1 0 0 0 f f f f t f i 1 0 2275 "25" _null_ _null_ _null_ _null_ textout _null_ _null_ _null_ ));
@@ -3351,6 +3353,8 @@ DATA(insert OID = 2215 ( regoperout PGNSP PGUID 12 1 0 0 0 f f f f t f s 1 0 2
33513353
DESCR("I/O");
33523354
DATA(insert OID = 3492 ( to_regoper PGNSP PGUID 12 1 0 0 0 f f f f t f s 1 0 2203 "2275" _null_ _null_ _null_ _null_ to_regoper _null_ _null_ _null_ ));
33533355
DESCR("convert operator name to regoper");
3356+
DATA(insert OID = 3476 ( to_regoperator PGNSP PGUID 12 1 0 0 0 f f f f t f s 1 0 2204 "2275" _null_ _null_ _null_ _null_ to_regoperator _null_ _null_ _null_ ));
3357+
DESCR("convert operator name to regoperator");
33543358
DATA(insert OID = 2216 ( regoperatorin PGNSP PGUID 12 1 0 0 0 f f f f t f s 1 0 2204 "2275" _null_ _null_ _null_ _null_ regoperatorin _null_ _null_ _null_ ));
33553359
DESCR("I/O");
33563360
DATA(insert OID = 2217 ( regoperatorout PGNSP PGUID 12 1 0 0 0 f f f f t f s 1 0 2275 "2204" _null_ _null_ _null_ _null_ regoperatorout _null_ _null_ _null_ ));

‎src/include/utils/builtins.h‎

Lines changed: 2 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -602,6 +602,7 @@ extern char *regexp_fixed_prefix(text *text_re, bool case_insensitive,
602602
extern Datum regprocin(PG_FUNCTION_ARGS);
603603
extern Datum regprocout(PG_FUNCTION_ARGS);
604604
extern Datum to_regproc(PG_FUNCTION_ARGS);
605+
extern Datum to_regprocedure(PG_FUNCTION_ARGS);
605606
extern Datum regprocrecv(PG_FUNCTION_ARGS);
606607
extern Datum regprocsend(PG_FUNCTION_ARGS);
607608
extern Datum regprocedurein(PG_FUNCTION_ARGS);
@@ -613,6 +614,7 @@ extern Datum regoperout(PG_FUNCTION_ARGS);
613614
extern Datum regoperrecv(PG_FUNCTION_ARGS);
614615
extern Datum regopersend(PG_FUNCTION_ARGS);
615616
extern Datum to_regoper(PG_FUNCTION_ARGS);
617+
extern Datum to_regoperator(PG_FUNCTION_ARGS);
616618
extern Datum regoperatorin(PG_FUNCTION_ARGS);
617619
extern Datum regoperatorout(PG_FUNCTION_ARGS);
618620
extern Datum regoperatorrecv(PG_FUNCTION_ARGS);

‎src/test/regress/expected/regproc.out‎

Lines changed: 82 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -9,12 +9,24 @@ SELECT regoper('||/');
99
||/
1010
(1 row)
1111

12+
SELECT regoperator('+(int4,int4)');
13+
regoperator
14+
--------------------
15+
+(integer,integer)
16+
(1 row)
17+
1218
SELECT regproc('now');
1319
regproc
1420
---------
1521
now
1622
(1 row)
1723

24+
SELECT regprocedure('abs(numeric)');
25+
regprocedure
26+
--------------
27+
abs(numeric)
28+
(1 row)
29+
1830
SELECT regclass('pg_class');
1931
regclass
2032
----------
@@ -33,12 +45,24 @@ SELECT to_regoper('||/');
3345
||/
3446
(1 row)
3547

48+
SELECT to_regoperator('+(int4,int4)');
49+
to_regoperator
50+
--------------------
51+
+(integer,integer)
52+
(1 row)
53+
3654
SELECT to_regproc('now');
3755
to_regproc
3856
------------
3957
now
4058
(1 row)
4159

60+
SELECT to_regprocedure('abs(numeric)');
61+
to_regprocedure
62+
-----------------
63+
abs(numeric)
64+
(1 row)
65+
4266
SELECT to_regclass('pg_class');
4367
to_regclass
4468
-------------
@@ -58,12 +82,24 @@ SELECT regoper('pg_catalog.||/');
5882
||/
5983
(1 row)
6084

85+
SELECT regoperator('pg_catalog.+(int4,int4)');
86+
regoperator
87+
--------------------
88+
+(integer,integer)
89+
(1 row)
90+
6191
SELECT regproc('pg_catalog.now');
6292
regproc
6393
---------
6494
now
6595
(1 row)
6696

97+
SELECT regprocedure('pg_catalog.abs(numeric)');
98+
regprocedure
99+
--------------
100+
abs(numeric)
101+
(1 row)
102+
67103
SELECT regclass('pg_catalog.pg_class');
68104
regclass
69105
----------
@@ -88,6 +124,12 @@ SELECT to_regproc('pg_catalog.now');
88124
now
89125
(1 row)
90126

127+
SELECT to_regprocedure('pg_catalog.abs(numeric)');
128+
to_regprocedure
129+
-----------------
130+
abs(numeric)
131+
(1 row)
132+
91133
SELECT to_regclass('pg_catalog.pg_class');
92134
to_regclass
93135
-------------
@@ -106,10 +148,18 @@ SELECT regoper('||//');
106148
ERROR: operator does not exist: ||//
107149
LINE 3: SELECT regoper('||//');
108150
^
151+
SELECT regoperator('++(int4,int4)');
152+
ERROR: operator does not exist: ++(int4,int4)
153+
LINE 1: SELECT regoperator('++(int4,int4)');
154+
^
109155
SELECT regproc('know');
110156
ERROR: function "know" does not exist
111157
LINE 1: SELECT regproc('know');
112158
^
159+
SELECT regprocedure('absinthe(numeric)');
160+
ERROR: function "absinthe(numeric)" does not exist
161+
LINE 1: SELECT regprocedure('absinthe(numeric)');
162+
^
113163
SELECT regclass('pg_classes');
114164
ERROR: relation "pg_classes" does not exist
115165
LINE 1: SELECT regclass('pg_classes');
@@ -123,10 +173,18 @@ SELECT regoper('ng_catalog.||/');
123173
ERROR: schema "ng_catalog" does not exist
124174
LINE 1: SELECT regoper('ng_catalog.||/');
125175
^
176+
SELECT regoperator('ng_catalog.+(int4,int4)');
177+
ERROR: operator does not exist: ng_catalog.+(int4,int4)
178+
LINE 1: SELECT regoperator('ng_catalog.+(int4,int4)');
179+
^
126180
SELECT regproc('ng_catalog.now');
127181
ERROR: schema "ng_catalog" does not exist
128182
LINE 1: SELECT regproc('ng_catalog.now');
129183
^
184+
SELECT regprocedure('ng_catalog.abs(numeric)');
185+
ERROR: schema "ng_catalog" does not exist
186+
LINE 1: SELECT regprocedure('ng_catalog.abs(numeric)');
187+
^
130188
SELECT regclass('ng_catalog.pg_class');
131189
ERROR: schema "ng_catalog" does not exist
132190
LINE 1: SELECT regclass('ng_catalog.pg_class');
@@ -143,12 +201,24 @@ SELECT to_regoper('||//');
143201

144202
(1 row)
145203

204+
SELECT to_regoperator('++(int4,int4)');
205+
to_regoperator
206+
----------------
207+
208+
(1 row)
209+
146210
SELECT to_regproc('know');
147211
to_regproc
148212
------------
149213

150214
(1 row)
151215

216+
SELECT to_regprocedure('absinthe(numeric)');
217+
to_regprocedure
218+
-----------------
219+
220+
(1 row)
221+
152222
SELECT to_regclass('pg_classes');
153223
to_regclass
154224
-------------
@@ -168,12 +238,24 @@ SELECT to_regoper('ng_catalog.||/');
168238

169239
(1 row)
170240

241+
SELECT to_regoperator('ng_catalog.+(int4,int4)');
242+
to_regoperator
243+
----------------
244+
245+
(1 row)
246+
171247
SELECT to_regproc('ng_catalog.now');
172248
to_regproc
173249
------------
174250

175251
(1 row)
176252

253+
SELECT to_regprocedure('ng_catalog.abs(numeric)');
254+
to_regprocedure
255+
-----------------
256+
257+
(1 row)
258+
177259
SELECT to_regclass('ng_catalog.pg_class');
178260
to_regclass
179261
-------------

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