1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
/*-------------------------------------------------------------------------
*
* regproc.c
* Functions for the built-in type "RegProcedure".
*
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/regproc.c,v 1.64 2001/10/25 05:49:45 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/genam.h"
#include "access/heapam.h"
#include "catalog/catname.h"
#include "catalog/indexing.h"
#include "catalog/pg_proc.h"
#include "miscadmin.h"
#include "utils/builtins.h"
#include "utils/fmgroids.h"
#include "utils/syscache.h"
/*****************************************************************************
* USER I/O ROUTINES *
*****************************************************************************/
/*
* regprocin - converts "proname" or "proid" to proid
*
* We need to accept an OID for cases where the name is ambiguous.
*
* proid of '-' signifies unknown, for consistency with regprocout
*/
Datum
regprocin(PG_FUNCTION_ARGS)
{
char *pro_name_or_oid = PG_GETARG_CSTRING(0);
RegProcedure result = InvalidOid;
int matches = 0;
ScanKeyData skey[1];
if (pro_name_or_oid[0] == '-' && pro_name_or_oid[1] == '\0')
PG_RETURN_OID(InvalidOid);
if (pro_name_or_oid[0] >= '0' &&
pro_name_or_oid[0] <= '9')
{
Oid searchOid;
searchOid = DatumGetObjectId(DirectFunctionCall1(oidin,
CStringGetDatum(pro_name_or_oid)));
result = (RegProcedure) GetSysCacheOid(PROCOID,
ObjectIdGetDatum(searchOid),
0, 0, 0);
if (!RegProcedureIsValid(result))
elog(ERROR, "No procedure with oid %s", pro_name_or_oid);
matches = 1;
}
else if (!IsIgnoringSystemIndexes())
{
Relation hdesc;
Relation idesc;
IndexScanDesc sd;
RetrieveIndexResult indexRes;
HeapTupleData tuple;
Buffer buffer;
ScanKeyEntryInitialize(&skey[0], 0x0,
(AttrNumber) 1,
(RegProcedure) F_NAMEEQ,
CStringGetDatum(pro_name_or_oid));
hdesc = heap_openr(ProcedureRelationName, AccessShareLock);
idesc = index_openr(ProcedureNameIndex);
sd = index_beginscan(idesc, false, 1, skey);
while ((indexRes = index_getnext(sd, ForwardScanDirection)))
{
tuple.t_datamcxt = NULL;
tuple.t_data = NULL;
tuple.t_self = indexRes->heap_iptr;
heap_fetch(hdesc, SnapshotNow, &tuple, &buffer, sd);
pfree(indexRes);
if (tuple.t_data != NULL)
{
result = (RegProcedure) tuple.t_data->t_oid;
ReleaseBuffer(buffer);
if (++matches > 1)
break;
}
}
index_endscan(sd);
index_close(idesc);
heap_close(hdesc, AccessShareLock);
}
else
{
Relation proc;
HeapScanDesc procscan;
HeapTuple proctup;
ScanKeyEntryInitialize(&skey[0], 0x0,
(AttrNumber) Anum_pg_proc_proname,
(RegProcedure) F_NAMEEQ,
CStringGetDatum(pro_name_or_oid));
proc = heap_openr(ProcedureRelationName, AccessShareLock);
procscan = heap_beginscan(proc, 0, SnapshotNow, 1, skey);
while (HeapTupleIsValid(proctup = heap_getnext(procscan, 0)))
{
result = proctup->t_data->t_oid;
if (++matches > 1)
break;
}
heap_endscan(procscan);
heap_close(proc, AccessShareLock);
}
if (matches > 1)
elog(ERROR, "There is more than one procedure named %s.\n\tSupply the pg_proc oid inside single quotes.", pro_name_or_oid);
else if (matches == 0)
elog(ERROR, "No procedure with name %s", pro_name_or_oid);
PG_RETURN_OID(result);
}
/*
* regprocout - converts proid to "pro_name"
*/
Datum
regprocout(PG_FUNCTION_ARGS)
{
RegProcedure proid = PG_GETARG_OID(0);
HeapTuple proctup;
char *result;
result = (char *) palloc(NAMEDATALEN);
if (proid == InvalidOid)
{
result[0] = '-';
result[1] = '\0';
PG_RETURN_CSTRING(result);
}
proctup = SearchSysCache(PROCOID,
ObjectIdGetDatum(proid),
0, 0, 0);
if (HeapTupleIsValid(proctup))
{
char *s;
s = NameStr(((Form_pg_proc) GETSTRUCT(proctup))->proname);
StrNCpy(result, s, NAMEDATALEN);
ReleaseSysCache(proctup);
}
else
{
result[0] = '-';
result[1] = '\0';
}
PG_RETURN_CSTRING(result);
}
/*****************************************************************************
* PUBLIC ROUTINES *
*****************************************************************************/
/* regproctooid()
* Lowercase version of RegprocToOid() to allow case-insensitive SQL.
* Define RegprocToOid() as a macro in builtins.h.
* Referenced in pg_proc.h. - tgl 97/04/26
*/
Datum
regproctooid(PG_FUNCTION_ARGS)
{
RegProcedure rp = PG_GETARG_OID(0);
PG_RETURN_OID((Oid) rp);
}
/* (see int.c for comparison/operation routines) */
|
