Line data Source code
1 : /*-------------------------------------------------------------------------
2 : *
3 : * brin_validate.c
4 : * Opclass validator for BRIN.
5 : *
6 : * Portions Copyright (c) 1996-2026, PostgreSQL Global Development Group
7 : * Portions Copyright (c) 1994, Regents of the University of California
8 : *
9 : * IDENTIFICATION
10 : * src/backend/access/brin/brin_validate.c
11 : *
12 : *-------------------------------------------------------------------------
13 : */
14 : #include "postgres.h"
15 :
16 : #include "access/amvalidate.h"
17 : #include "access/brin_internal.h"
18 : #include "access/htup_details.h"
19 : #include "catalog/pg_amop.h"
20 : #include "catalog/pg_amproc.h"
21 : #include "catalog/pg_opclass.h"
22 : #include "catalog/pg_type.h"
23 : #include "utils/builtins.h"
24 : #include "utils/lsyscache.h"
25 : #include "utils/regproc.h"
26 : #include "utils/syscache.h"
27 :
28 : /*
29 : * Validator for a BRIN opclass.
30 : *
31 : * Some of the checks done here cover the whole opfamily, and therefore are
32 : * redundant when checking each opclass in a family. But they don't run long
33 : * enough to be much of a problem, so we accept the duplication rather than
34 : * complicate the amvalidate API.
35 : */
36 : bool
37 216 : brinvalidate(Oid opclassoid)
38 : {
39 216 : bool result = true;
40 : HeapTuple classtup;
41 : Form_pg_opclass classform;
42 : Oid opfamilyoid;
43 : Oid opcintype;
44 : char *opclassname;
45 : char *opfamilyname;
46 : CatCList *proclist,
47 : *oprlist;
48 216 : uint64 allfuncs = 0;
49 216 : uint64 allops = 0;
50 : List *grouplist;
51 : OpFamilyOpFuncGroup *opclassgroup;
52 : int i;
53 : ListCell *lc;
54 :
55 : /* Fetch opclass information */
56 216 : classtup = SearchSysCache1(CLAOID, ObjectIdGetDatum(opclassoid));
57 216 : if (!HeapTupleIsValid(classtup))
58 0 : elog(ERROR, "cache lookup failed for operator class %u", opclassoid);
59 216 : classform = (Form_pg_opclass) GETSTRUCT(classtup);
60 :
61 216 : opfamilyoid = classform->opcfamily;
62 216 : opcintype = classform->opcintype;
63 216 : opclassname = NameStr(classform->opcname);
64 :
65 : /* Fetch opfamily information */
66 216 : opfamilyname = get_opfamily_name(opfamilyoid, false);
67 :
68 : /* Fetch all operators and support functions of the opfamily */
69 216 : oprlist = SearchSysCacheList1(AMOPSTRATEGY, ObjectIdGetDatum(opfamilyoid));
70 216 : proclist = SearchSysCacheList1(AMPROCNUM, ObjectIdGetDatum(opfamilyoid));
71 :
72 : /* Check individual support functions */
73 2034 : for (i = 0; i < proclist->n_members; i++)
74 : {
75 1818 : HeapTuple proctup = &proclist->members[i]->tuple;
76 1818 : Form_pg_amproc procform = (Form_pg_amproc) GETSTRUCT(proctup);
77 : bool ok;
78 :
79 : /* Check procedure numbers and function signatures */
80 1818 : switch (procform->amprocnum)
81 : {
82 342 : case BRIN_PROCNUM_OPCINFO:
83 342 : ok = check_amproc_signature(procform->amproc, INTERNALOID, true,
84 : 1, 1, INTERNALOID);
85 342 : break;
86 342 : case BRIN_PROCNUM_ADDVALUE:
87 342 : ok = check_amproc_signature(procform->amproc, BOOLOID, true,
88 : 4, 4, INTERNALOID, INTERNALOID,
89 : INTERNALOID, INTERNALOID);
90 342 : break;
91 342 : case BRIN_PROCNUM_CONSISTENT:
92 342 : ok = check_amproc_signature(procform->amproc, BOOLOID, true,
93 : 3, 4, INTERNALOID, INTERNALOID,
94 : INTERNALOID, INT4OID);
95 342 : break;
96 342 : case BRIN_PROCNUM_UNION:
97 342 : ok = check_amproc_signature(procform->amproc, BOOLOID, true,
98 : 3, 3, INTERNALOID, INTERNALOID,
99 : INTERNALOID);
100 342 : break;
101 213 : case BRIN_PROCNUM_OPTIONS:
102 213 : ok = check_amoptsproc_signature(procform->amproc);
103 213 : break;
104 237 : default:
105 : /* Complain if it's not a valid optional proc number */
106 237 : if (procform->amprocnum < BRIN_FIRST_OPTIONAL_PROCNUM ||
107 237 : procform->amprocnum > BRIN_LAST_OPTIONAL_PROCNUM)
108 : {
109 0 : ereport(INFO,
110 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
111 : errmsg("operator family \"%s\" of access method %s contains function %s with invalid support number %d",
112 : opfamilyname, "brin",
113 : format_procedure(procform->amproc),
114 : procform->amprocnum)));
115 0 : result = false;
116 0 : continue; /* omit bad proc numbers from allfuncs */
117 : }
118 : /* Can't check signatures of optional procs, so assume OK */
119 237 : ok = true;
120 237 : break;
121 : }
122 :
123 1818 : if (!ok)
124 : {
125 0 : ereport(INFO,
126 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
127 : errmsg("operator family \"%s\" of access method %s contains function %s with wrong signature for support number %d",
128 : opfamilyname, "brin",
129 : format_procedure(procform->amproc),
130 : procform->amprocnum)));
131 0 : result = false;
132 : }
133 :
134 : /* Track all valid procedure numbers seen in opfamily */
135 1818 : allfuncs |= ((uint64) 1) << procform->amprocnum;
136 : }
137 :
138 : /* Check individual operators */
139 2724 : for (i = 0; i < oprlist->n_members; i++)
140 : {
141 2508 : HeapTuple oprtup = &oprlist->members[i]->tuple;
142 2508 : Form_pg_amop oprform = (Form_pg_amop) GETSTRUCT(oprtup);
143 :
144 : /* Check that only allowed strategy numbers exist */
145 2508 : if (oprform->amopstrategy < 1 || oprform->amopstrategy > 63)
146 : {
147 0 : ereport(INFO,
148 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
149 : errmsg("operator family \"%s\" of access method %s contains operator %s with invalid strategy number %d",
150 : opfamilyname, "brin",
151 : format_operator(oprform->amopopr),
152 : oprform->amopstrategy)));
153 0 : result = false;
154 : }
155 : else
156 : {
157 : /*
158 : * The set of operators supplied varies across BRIN opfamilies.
159 : * Our plan is to identify all operator strategy numbers used in
160 : * the opfamily and then complain about datatype combinations that
161 : * are missing any operator(s). However, consider only numbers
162 : * that appear in some non-cross-type case, since cross-type
163 : * operators may have unique strategies. (This is not a great
164 : * heuristic, in particular an erroneous number used in a
165 : * cross-type operator will not get noticed; but the core BRIN
166 : * opfamilies are messy enough to make it necessary.)
167 : */
168 2508 : if (oprform->amoplefttype == oprform->amoprighttype)
169 1302 : allops |= ((uint64) 1) << oprform->amopstrategy;
170 : }
171 :
172 : /* brin doesn't support ORDER BY operators */
173 2508 : if (oprform->amoppurpose != AMOP_SEARCH ||
174 2508 : OidIsValid(oprform->amopsortfamily))
175 : {
176 0 : ereport(INFO,
177 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
178 : errmsg("operator family \"%s\" of access method %s contains invalid ORDER BY specification for operator %s",
179 : opfamilyname, "brin",
180 : format_operator(oprform->amopopr))));
181 0 : result = false;
182 : }
183 :
184 : /* Check operator signature --- same for all brin strategies */
185 2508 : if (!check_amop_signature(oprform->amopopr, BOOLOID,
186 : oprform->amoplefttype,
187 : oprform->amoprighttype))
188 : {
189 0 : ereport(INFO,
190 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
191 : errmsg("operator family \"%s\" of access method %s contains operator %s with wrong signature",
192 : opfamilyname, "brin",
193 : format_operator(oprform->amopopr))));
194 0 : result = false;
195 : }
196 : }
197 :
198 : /* Now check for inconsistent groups of operators/functions */
199 216 : grouplist = identify_opfamily_groups(oprlist, proclist);
200 216 : opclassgroup = NULL;
201 804 : foreach(lc, grouplist)
202 : {
203 588 : OpFamilyOpFuncGroup *thisgroup = (OpFamilyOpFuncGroup *) lfirst(lc);
204 :
205 : /* Remember the group exactly matching the test opclass */
206 588 : if (thisgroup->lefttype == opcintype &&
207 306 : thisgroup->righttype == opcintype)
208 216 : opclassgroup = thisgroup;
209 :
210 : /*
211 : * Some BRIN opfamilies expect cross-type support functions to exist,
212 : * and some don't. We don't know exactly which are which, so if we
213 : * find a cross-type operator for which there are no support functions
214 : * at all, let it pass. (Don't expect that all operators exist for
215 : * such cross-type cases, either.)
216 : */
217 588 : if (thisgroup->functionset == 0 &&
218 246 : thisgroup->lefttype != thisgroup->righttype)
219 246 : continue;
220 :
221 : /*
222 : * Else complain if there seems to be an incomplete set of either
223 : * operators or support functions for this datatype pair.
224 : */
225 342 : if (thisgroup->operatorset != allops)
226 : {
227 0 : ereport(INFO,
228 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
229 : errmsg("operator family \"%s\" of access method %s is missing operator(s) for types %s and %s",
230 : opfamilyname, "brin",
231 : format_type_be(thisgroup->lefttype),
232 : format_type_be(thisgroup->righttype))));
233 0 : result = false;
234 : }
235 342 : if (thisgroup->functionset != allfuncs)
236 : {
237 0 : ereport(INFO,
238 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
239 : errmsg("operator family \"%s\" of access method %s is missing support function(s) for types %s and %s",
240 : opfamilyname, "brin",
241 : format_type_be(thisgroup->lefttype),
242 : format_type_be(thisgroup->righttype))));
243 0 : result = false;
244 : }
245 : }
246 :
247 : /* Check that the originally-named opclass is complete */
248 216 : if (!opclassgroup || opclassgroup->operatorset != allops)
249 : {
250 0 : ereport(INFO,
251 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
252 : errmsg("operator class \"%s\" of access method %s is missing operator(s)",
253 : opclassname, "brin")));
254 0 : result = false;
255 : }
256 1080 : for (i = 1; i <= BRIN_MANDATORY_NPROCS; i++)
257 : {
258 864 : if (opclassgroup &&
259 864 : (opclassgroup->functionset & (((int64) 1) << i)) != 0)
260 864 : continue; /* got it */
261 0 : ereport(INFO,
262 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
263 : errmsg("operator class \"%s\" of access method %s is missing support function %d",
264 : opclassname, "brin", i)));
265 0 : result = false;
266 : }
267 :
268 216 : ReleaseCatCacheList(proclist);
269 216 : ReleaseCatCacheList(oprlist);
270 216 : ReleaseSysCache(classtup);
271 :
272 216 : return result;
273 : }
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