Line data Source code
1 : /*-------------------------------------------------------------------------
2 : *
3 : * gistvalidate.c
4 : * Opclass validator for GiST.
5 : *
6 : * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
7 : * Portions Copyright (c) 1994, Regents of the University of California
8 : *
9 : * IDENTIFICATION
10 : * src/backend/access/gist/gistvalidate.c
11 : *
12 : *-------------------------------------------------------------------------
13 : */
14 : #include "postgres.h"
15 :
16 : #include "access/amvalidate.h"
17 : #include "access/gist_private.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/lsyscache.h"
24 : #include "utils/regproc.h"
25 : #include "utils/syscache.h"
26 :
27 :
28 : /*
29 : * Validator for a GiST opclass.
30 : */
31 : bool
32 122 : gistvalidate(Oid opclassoid)
33 : {
34 122 : bool result = true;
35 : HeapTuple classtup;
36 : Form_pg_opclass classform;
37 : Oid opfamilyoid;
38 : Oid opcintype;
39 : Oid opckeytype;
40 : char *opclassname;
41 : char *opfamilyname;
42 : CatCList *proclist,
43 : *oprlist;
44 : List *grouplist;
45 : OpFamilyOpFuncGroup *opclassgroup;
46 : int i;
47 : ListCell *lc;
48 :
49 : /* Fetch opclass information */
50 122 : classtup = SearchSysCache1(CLAOID, ObjectIdGetDatum(opclassoid));
51 122 : if (!HeapTupleIsValid(classtup))
52 0 : elog(ERROR, "cache lookup failed for operator class %u", opclassoid);
53 122 : classform = (Form_pg_opclass) GETSTRUCT(classtup);
54 :
55 122 : opfamilyoid = classform->opcfamily;
56 122 : opcintype = classform->opcintype;
57 122 : opckeytype = classform->opckeytype;
58 122 : if (!OidIsValid(opckeytype))
59 24 : opckeytype = opcintype;
60 122 : opclassname = NameStr(classform->opcname);
61 :
62 : /* Fetch opfamily information */
63 122 : opfamilyname = get_opfamily_name(opfamilyoid, false);
64 :
65 : /* Fetch all operators and support functions of the opfamily */
66 122 : oprlist = SearchSysCacheList1(AMOPSTRATEGY, ObjectIdGetDatum(opfamilyoid));
67 122 : proclist = SearchSysCacheList1(AMPROCNUM, ObjectIdGetDatum(opfamilyoid));
68 :
69 : /* Check individual support functions */
70 1130 : for (i = 0; i < proclist->n_members; i++)
71 : {
72 1008 : HeapTuple proctup = &proclist->members[i]->tuple;
73 1008 : Form_pg_amproc procform = (Form_pg_amproc) GETSTRUCT(proctup);
74 : bool ok;
75 :
76 : /*
77 : * All GiST support functions should be registered with matching
78 : * left/right types
79 : */
80 1008 : if (procform->amproclefttype != procform->amprocrighttype)
81 : {
82 0 : ereport(INFO,
83 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
84 : errmsg("operator family \"%s\" of access method %s contains support function %s with different left and right input types",
85 : opfamilyname, "gist",
86 : format_procedure(procform->amproc))));
87 0 : result = false;
88 : }
89 :
90 : /*
91 : * We can't check signatures except within the specific opclass, since
92 : * we need to know the associated opckeytype in many cases.
93 : */
94 1008 : if (procform->amproclefttype != opcintype)
95 88 : continue;
96 :
97 : /* Check procedure numbers and function signatures */
98 920 : switch (procform->amprocnum)
99 : {
100 122 : case GIST_CONSISTENT_PROC:
101 122 : ok = check_amproc_signature(procform->amproc, BOOLOID, false,
102 : 5, 5, INTERNALOID, opcintype,
103 : INT2OID, OIDOID, INTERNALOID);
104 122 : break;
105 122 : case GIST_UNION_PROC:
106 122 : ok = check_amproc_signature(procform->amproc, opckeytype, false,
107 : 2, 2, INTERNALOID, INTERNALOID);
108 122 : break;
109 234 : case GIST_COMPRESS_PROC:
110 : case GIST_DECOMPRESS_PROC:
111 : case GIST_FETCH_PROC:
112 234 : ok = check_amproc_signature(procform->amproc, INTERNALOID, true,
113 : 1, 1, INTERNALOID);
114 234 : break;
115 122 : case GIST_PENALTY_PROC:
116 122 : ok = check_amproc_signature(procform->amproc, INTERNALOID, true,
117 : 3, 3, INTERNALOID,
118 : INTERNALOID, INTERNALOID);
119 122 : break;
120 122 : case GIST_PICKSPLIT_PROC:
121 122 : ok = check_amproc_signature(procform->amproc, INTERNALOID, true,
122 : 2, 2, INTERNALOID, INTERNALOID);
123 122 : break;
124 122 : case GIST_EQUAL_PROC:
125 122 : ok = check_amproc_signature(procform->amproc, INTERNALOID, false,
126 : 3, 3, opckeytype, opckeytype,
127 : INTERNALOID);
128 122 : break;
129 52 : case GIST_DISTANCE_PROC:
130 52 : ok = check_amproc_signature(procform->amproc, FLOAT8OID, false,
131 : 5, 5, INTERNALOID, opcintype,
132 : INT2OID, OIDOID, INTERNALOID);
133 52 : break;
134 18 : case GIST_OPTIONS_PROC:
135 18 : ok = check_amoptsproc_signature(procform->amproc);
136 18 : break;
137 6 : case GIST_SORTSUPPORT_PROC:
138 6 : ok = check_amproc_signature(procform->amproc, VOIDOID, true,
139 : 1, 1, INTERNALOID);
140 6 : break;
141 0 : case GIST_STRATNUM_PROC:
142 0 : ok = check_amproc_signature(procform->amproc, INT2OID, true,
143 0 : 1, 1, INT4OID) &&
144 0 : procform->amproclefttype == ANYOID &&
145 0 : procform->amprocrighttype == ANYOID;
146 0 : break;
147 0 : default:
148 0 : ereport(INFO,
149 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
150 : errmsg("operator family \"%s\" of access method %s contains function %s with invalid support number %d",
151 : opfamilyname, "gist",
152 : format_procedure(procform->amproc),
153 : procform->amprocnum)));
154 0 : result = false;
155 0 : continue; /* don't want additional message */
156 : }
157 :
158 920 : if (!ok)
159 : {
160 0 : ereport(INFO,
161 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
162 : errmsg("operator family \"%s\" of access method %s contains function %s with wrong signature for support number %d",
163 : opfamilyname, "gist",
164 : format_procedure(procform->amproc),
165 : procform->amprocnum)));
166 0 : result = false;
167 : }
168 : }
169 :
170 : /* Check individual operators */
171 1178 : for (i = 0; i < oprlist->n_members; i++)
172 : {
173 1056 : HeapTuple oprtup = &oprlist->members[i]->tuple;
174 1056 : Form_pg_amop oprform = (Form_pg_amop) GETSTRUCT(oprtup);
175 : Oid op_rettype;
176 :
177 : /* TODO: Check that only allowed strategy numbers exist */
178 1056 : if (oprform->amopstrategy < 1)
179 : {
180 0 : ereport(INFO,
181 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
182 : errmsg("operator family \"%s\" of access method %s contains operator %s with invalid strategy number %d",
183 : opfamilyname, "gist",
184 : format_operator(oprform->amopopr),
185 : oprform->amopstrategy)));
186 0 : result = false;
187 : }
188 :
189 : /* GiST supports ORDER BY operators */
190 1056 : if (oprform->amoppurpose != AMOP_SEARCH)
191 : {
192 : /* ... but must have matching distance proc */
193 62 : if (!OidIsValid(get_opfamily_proc(opfamilyoid,
194 : oprform->amoplefttype,
195 : oprform->amoplefttype,
196 : GIST_DISTANCE_PROC)))
197 : {
198 0 : ereport(INFO,
199 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
200 : errmsg("operator family \"%s\" of access method %s contains unsupported ORDER BY specification for operator %s",
201 : opfamilyname, "gist",
202 : format_operator(oprform->amopopr))));
203 0 : result = false;
204 : }
205 : /* ... and operator result must match the claimed btree opfamily */
206 62 : op_rettype = get_op_rettype(oprform->amopopr);
207 62 : if (!opfamily_can_sort_type(oprform->amopsortfamily, op_rettype))
208 : {
209 0 : ereport(INFO,
210 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
211 : errmsg("operator family \"%s\" of access method %s contains incorrect ORDER BY opfamily specification for operator %s",
212 : opfamilyname, "gist",
213 : format_operator(oprform->amopopr))));
214 0 : result = false;
215 : }
216 : }
217 : else
218 : {
219 : /* Search operators must always return bool */
220 994 : op_rettype = BOOLOID;
221 : }
222 :
223 : /* Check operator signature */
224 1056 : if (!check_amop_signature(oprform->amopopr, op_rettype,
225 : oprform->amoplefttype,
226 : oprform->amoprighttype))
227 : {
228 0 : ereport(INFO,
229 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
230 : errmsg("operator family \"%s\" of access method %s contains operator %s with wrong signature",
231 : opfamilyname, "gist",
232 : format_operator(oprform->amopopr))));
233 0 : result = false;
234 : }
235 : }
236 :
237 : /* Now check for inconsistent groups of operators/functions */
238 122 : grouplist = identify_opfamily_groups(oprlist, proclist);
239 122 : opclassgroup = NULL;
240 442 : foreach(lc, grouplist)
241 : {
242 320 : OpFamilyOpFuncGroup *thisgroup = (OpFamilyOpFuncGroup *) lfirst(lc);
243 :
244 : /* Remember the group exactly matching the test opclass */
245 320 : if (thisgroup->lefttype == opcintype &&
246 212 : thisgroup->righttype == opcintype)
247 122 : opclassgroup = thisgroup;
248 :
249 : /*
250 : * There is not a lot we can do to check the operator sets, since each
251 : * GiST opclass is more or less a law unto itself, and some contain
252 : * only operators that are binary-compatible with the opclass datatype
253 : * (meaning that empty operator sets can be OK). That case also means
254 : * that we shouldn't insist on nonempty function sets except for the
255 : * opclass's own group.
256 : */
257 : }
258 :
259 : /* Check that the originally-named opclass is complete */
260 1586 : for (i = 1; i <= GISTNProcs; i++)
261 : {
262 1464 : if (opclassgroup &&
263 1464 : (opclassgroup->functionset & (((uint64) 1) << i)) != 0)
264 920 : continue; /* got it */
265 544 : if (i == GIST_DISTANCE_PROC || i == GIST_FETCH_PROC ||
266 394 : i == GIST_COMPRESS_PROC || i == GIST_DECOMPRESS_PROC ||
267 238 : i == GIST_OPTIONS_PROC || i == GIST_SORTSUPPORT_PROC ||
268 : i == GIST_STRATNUM_PROC)
269 544 : continue; /* optional methods */
270 0 : ereport(INFO,
271 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
272 : errmsg("operator class \"%s\" of access method %s is missing support function %d",
273 : opclassname, "gist", i)));
274 0 : result = false;
275 : }
276 :
277 122 : ReleaseCatCacheList(proclist);
278 122 : ReleaseCatCacheList(oprlist);
279 122 : ReleaseSysCache(classtup);
280 :
281 122 : return result;
282 : }
283 :
284 : /*
285 : * Prechecking function for adding operators/functions to a GiST opfamily.
286 : */
287 : void
288 248 : gistadjustmembers(Oid opfamilyoid,
289 : Oid opclassoid,
290 : List *operators,
291 : List *functions)
292 : {
293 : ListCell *lc;
294 :
295 : /*
296 : * Operator members of a GiST opfamily should never have hard
297 : * dependencies, since their connection to the opfamily depends only on
298 : * what the support functions think, and that can be altered. For
299 : * consistency, we make all soft dependencies point to the opfamily,
300 : * though a soft dependency on the opclass would work as well in the
301 : * CREATE OPERATOR CLASS case.
302 : */
303 972 : foreach(lc, operators)
304 : {
305 724 : OpFamilyMember *op = (OpFamilyMember *) lfirst(lc);
306 :
307 724 : op->ref_is_hard = false;
308 724 : op->ref_is_family = true;
309 724 : op->refobjid = opfamilyoid;
310 : }
311 :
312 : /*
313 : * Required support functions should have hard dependencies. Preferably
314 : * those are just dependencies on the opclass, but if we're in ALTER
315 : * OPERATOR FAMILY, we leave the dependency pointing at the whole
316 : * opfamily. (Given that GiST opclasses generally don't share opfamilies,
317 : * it seems unlikely to be worth working harder.)
318 : */
319 1066 : foreach(lc, functions)
320 : {
321 818 : OpFamilyMember *op = (OpFamilyMember *) lfirst(lc);
322 :
323 818 : switch (op->number)
324 : {
325 480 : case GIST_CONSISTENT_PROC:
326 : case GIST_UNION_PROC:
327 : case GIST_PENALTY_PROC:
328 : case GIST_PICKSPLIT_PROC:
329 : case GIST_EQUAL_PROC:
330 : /* Required support function */
331 480 : op->ref_is_hard = true;
332 480 : break;
333 338 : case GIST_COMPRESS_PROC:
334 : case GIST_DECOMPRESS_PROC:
335 : case GIST_DISTANCE_PROC:
336 : case GIST_FETCH_PROC:
337 : case GIST_OPTIONS_PROC:
338 : case GIST_SORTSUPPORT_PROC:
339 : case GIST_STRATNUM_PROC:
340 : /* Optional, so force it to be a soft family dependency */
341 338 : op->ref_is_hard = false;
342 338 : op->ref_is_family = true;
343 338 : op->refobjid = opfamilyoid;
344 338 : break;
345 0 : default:
346 0 : ereport(ERROR,
347 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
348 : errmsg("support function number %d is invalid for access method %s",
349 : op->number, "gist")));
350 : break;
351 : }
352 : }
353 248 : }
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