LCOV - differential code coverage report
Current view: top level - src/backend/access/hash - hashvalidate.c (source / functions) Coverage Total Hit UBC CBC
Current: c70b6db34ffeab48beef1fb4ce61bcad3772b8dd vs 06473f5a344df8c9594ead90a609b86f6724cff8 Lines: 76.7 % 103 79 24 79
Current Date: 2025-09-06 07:49:51 +0900 Functions: 100.0 % 2 2 2
Baseline: lcov-20250906-005545-baseline Branches: 57.8 % 90 52 38 52
Baseline Date: 2025-09-05 08:21:35 +0100 Line coverage date bins:
Legend: Lines:     hit not hit
Branches: + taken - not taken # not executed
(30,360] days: 63.6 % 11 7 4 7
(360..) days: 78.3 % 92 72 20 72
Function coverage date bins:
(360..) days: 100.0 % 2 2 2
Branch coverage date bins:
(30,360] days: 50.0 % 10 5 5 5
(360..) days: 58.8 % 80 47 33 47

 Age         Owner                    Branch data    TLA  Line data    Source code
                                  1                 :                : /*-------------------------------------------------------------------------
                                  2                 :                :  *
                                  3                 :                :  * hashvalidate.c
                                  4                 :                :  *    Opclass validator for hash.
                                  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/hash/hashvalidate.c
                                 11                 :                :  *
                                 12                 :                :  *-------------------------------------------------------------------------
                                 13                 :                :  */
                                 14                 :                : #include "postgres.h"
                                 15                 :                : 
                                 16                 :                : #include "access/amvalidate.h"
                                 17                 :                : #include "access/hash.h"
                                 18                 :                : #include "access/htup_details.h"
                                 19                 :                : #include "access/xact.h"
                                 20                 :                : #include "catalog/pg_am.h"
                                 21                 :                : #include "catalog/pg_amop.h"
                                 22                 :                : #include "catalog/pg_amproc.h"
                                 23                 :                : #include "catalog/pg_opclass.h"
                                 24                 :                : #include "catalog/pg_type.h"
                                 25                 :                : #include "utils/builtins.h"
                                 26                 :                : #include "utils/lsyscache.h"
                                 27                 :                : #include "utils/regproc.h"
                                 28                 :                : #include "utils/syscache.h"
                                 29                 :                : 
                                 30                 :                : 
                                 31                 :                : /*
                                 32                 :                :  * Validator for a hash opclass.
                                 33                 :                :  *
                                 34                 :                :  * Some of the checks done here cover the whole opfamily, and therefore are
                                 35                 :                :  * redundant when checking each opclass in a family.  But they don't run long
                                 36                 :                :  * enough to be much of a problem, so we accept the duplication rather than
                                 37                 :                :  * complicate the amvalidate API.
                                 38                 :                :  */
                                 39                 :                : bool
 3520 tgl@sss.pgh.pa.us          40                 :CBC         140 : hashvalidate(Oid opclassoid)
                                 41                 :                : {
 3516                            42                 :            140 :     bool        result = true;
                                 43                 :                :     HeapTuple   classtup;
                                 44                 :                :     Form_pg_opclass classform;
                                 45                 :                :     Oid         opfamilyoid;
                                 46                 :                :     Oid         opcintype;
                                 47                 :                :     char       *opclassname;
                                 48                 :                :     char       *opfamilyname;
                                 49                 :                :     CatCList   *proclist,
                                 50                 :                :                *oprlist;
                                 51                 :                :     List       *grouplist;
                                 52                 :                :     OpFamilyOpFuncGroup *opclassgroup;
                                 53                 :            140 :     List       *hashabletypes = NIL;
                                 54                 :                :     int         i;
                                 55                 :                :     ListCell   *lc;
                                 56                 :                : 
                                 57                 :                :     /* Fetch opclass information */
 3520                            58                 :            140 :     classtup = SearchSysCache1(CLAOID, ObjectIdGetDatum(opclassoid));
                                 59         [ -  + ]:            140 :     if (!HeapTupleIsValid(classtup))
 3520 tgl@sss.pgh.pa.us          60         [ #  # ]:UBC           0 :         elog(ERROR, "cache lookup failed for operator class %u", opclassoid);
 3520 tgl@sss.pgh.pa.us          61                 :CBC         140 :     classform = (Form_pg_opclass) GETSTRUCT(classtup);
                                 62                 :                : 
                                 63                 :            140 :     opfamilyoid = classform->opcfamily;
                                 64                 :            140 :     opcintype = classform->opcintype;
 3516                            65                 :            140 :     opclassname = NameStr(classform->opcname);
                                 66                 :                : 
                                 67                 :                :     /* Fetch opfamily information */
  225 peter@eisentraut.org       68                 :            140 :     opfamilyname = get_opfamily_name(opfamilyoid, false);
                                 69                 :                : 
                                 70                 :                :     /* Fetch all operators and support functions of the opfamily */
 3520 tgl@sss.pgh.pa.us          71                 :            140 :     oprlist = SearchSysCacheList1(AMOPSTRATEGY, ObjectIdGetDatum(opfamilyoid));
                                 72                 :            140 :     proclist = SearchSysCacheList1(AMPROCNUM, ObjectIdGetDatum(opfamilyoid));
                                 73                 :                : 
                                 74                 :                :     /* Check individual support functions */
                                 75         [ +  + ]:            528 :     for (i = 0; i < proclist->n_members; i++)
                                 76                 :                :     {
                                 77                 :            388 :         HeapTuple   proctup = &proclist->members[i]->tuple;
                                 78                 :            388 :         Form_pg_amproc procform = (Form_pg_amproc) GETSTRUCT(proctup);
                                 79                 :                :         bool        ok;
                                 80                 :                : 
                                 81                 :                :         /*
                                 82                 :                :          * All hash functions should be registered with matching left/right
                                 83                 :                :          * types
                                 84                 :                :          */
 3516                            85         [ -  + ]:            388 :         if (procform->amproclefttype != procform->amprocrighttype)
                                 86                 :                :         {
 3516 tgl@sss.pgh.pa.us          87         [ #  # ]:UBC           0 :             ereport(INFO,
                                 88                 :                :                     (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
                                 89                 :                :                      errmsg("operator family \"%s\" of access method %s contains support function %s with different left and right input types",
                                 90                 :                :                             opfamilyname, "hash",
                                 91                 :                :                             format_procedure(procform->amproc))));
                                 92                 :              0 :             result = false;
                                 93                 :                :         }
                                 94                 :                : 
                                 95                 :                :         /* Check procedure numbers and function signatures */
 3516 tgl@sss.pgh.pa.us          96   [ +  +  -  - ]:CBC         388 :         switch (procform->amprocnum)
                                 97                 :                :         {
 2928 rhaas@postgresql.org       98                 :            223 :             case HASHSTANDARD_PROC:
  359 peter@eisentraut.org       99                 :            223 :                 ok = check_amproc_signature(procform->amproc, INT4OID, true,
                                100                 :                :                                             1, 1, procform->amproclefttype);
                                101                 :            223 :                 break;
 2928 rhaas@postgresql.org      102                 :            165 :             case HASHEXTENDED_PROC:
  359 peter@eisentraut.org      103                 :            165 :                 ok = check_amproc_signature(procform->amproc, INT8OID, true,
                                104                 :                :                                             2, 2, procform->amproclefttype, INT8OID);
 3516 tgl@sss.pgh.pa.us         105                 :            165 :                 break;
 1986 akorotkov@postgresql      106                 :UBC           0 :             case HASHOPTIONS_PROC:
  359 peter@eisentraut.org      107                 :              0 :                 ok = check_amoptsproc_signature(procform->amproc);
 1986 akorotkov@postgresql      108                 :              0 :                 break;
 3516 tgl@sss.pgh.pa.us         109                 :              0 :             default:
                                110         [ #  # ]:              0 :                 ereport(INFO,
                                111                 :                :                         (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
                                112                 :                :                          errmsg("operator family \"%s\" of access method %s contains function %s with invalid support number %d",
                                113                 :                :                                 opfamilyname, "hash",
                                114                 :                :                                 format_procedure(procform->amproc),
                                115                 :                :                                 procform->amprocnum)));
                                116                 :              0 :                 result = false;
  359 peter@eisentraut.org      117                 :              0 :                 continue;       /* don't want additional message */
                                118                 :                :         }
                                119                 :                : 
  359 peter@eisentraut.org      120         [ -  + ]:CBC         388 :         if (!ok)
                                121                 :                :         {
  359 peter@eisentraut.org      122         [ #  # ]:UBC           0 :             ereport(INFO,
                                123                 :                :                     (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
                                124                 :                :                      errmsg("operator family \"%s\" of access method %s contains function %s with wrong signature for support number %d",
                                125                 :                :                             opfamilyname, "hash",
                                126                 :                :                             format_procedure(procform->amproc),
                                127                 :                :                             procform->amprocnum)));
                                128                 :              0 :             result = false;
                                129                 :                :         }
                                130                 :                : 
                                131                 :                :         /* Remember which types we can hash */
  359 peter@eisentraut.org      132   [ +  -  +  +  :CBC         388 :         if (ok && (procform->amprocnum == HASHSTANDARD_PROC || procform->amprocnum == HASHEXTENDED_PROC))
                                              +  - ]
                                133                 :                :         {
                                134                 :            388 :             hashabletypes = list_append_unique_oid(hashabletypes, procform->amproclefttype);
                                135                 :                :         }
                                136                 :                :     }
                                137                 :                : 
                                138                 :                :     /* Check individual operators */
 3520 tgl@sss.pgh.pa.us         139         [ +  + ]:            613 :     for (i = 0; i < oprlist->n_members; i++)
                                140                 :                :     {
                                141                 :            473 :         HeapTuple   oprtup = &oprlist->members[i]->tuple;
                                142                 :            473 :         Form_pg_amop oprform = (Form_pg_amop) GETSTRUCT(oprtup);
                                143                 :                : 
                                144                 :                :         /* Check that only allowed strategy numbers exist */
                                145         [ +  - ]:            473 :         if (oprform->amopstrategy < 1 ||
                                146         [ -  + ]:            473 :             oprform->amopstrategy > HTMaxStrategyNumber)
                                147                 :                :         {
 3516 tgl@sss.pgh.pa.us         148         [ #  # ]:UBC           0 :             ereport(INFO,
                                149                 :                :                     (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
                                150                 :                :                      errmsg("operator family \"%s\" of access method %s contains operator %s with invalid strategy number %d",
                                151                 :                :                             opfamilyname, "hash",
                                152                 :                :                             format_operator(oprform->amopopr),
                                153                 :                :                             oprform->amopstrategy)));
                                154                 :              0 :             result = false;
                                155                 :                :         }
                                156                 :                : 
                                157                 :                :         /* hash doesn't support ORDER BY operators */
 3516 tgl@sss.pgh.pa.us         158         [ +  - ]:CBC         473 :         if (oprform->amoppurpose != AMOP_SEARCH ||
                                159         [ -  + ]:            473 :             OidIsValid(oprform->amopsortfamily))
                                160                 :                :         {
 3516 tgl@sss.pgh.pa.us         161         [ #  # ]:UBC           0 :             ereport(INFO,
                                162                 :                :                     (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
                                163                 :                :                      errmsg("operator family \"%s\" of access method %s contains invalid ORDER BY specification for operator %s",
                                164                 :                :                             opfamilyname, "hash",
                                165                 :                :                             format_operator(oprform->amopopr))));
                                166                 :              0 :             result = false;
                                167                 :                :         }
                                168                 :                : 
                                169                 :                :         /* Check operator signature --- same for all hash strategies */
 3516 tgl@sss.pgh.pa.us         170         [ -  + ]:CBC         473 :         if (!check_amop_signature(oprform->amopopr, BOOLOID,
                                171                 :                :                                   oprform->amoplefttype,
                                172                 :                :                                   oprform->amoprighttype))
                                173                 :                :         {
 3516 tgl@sss.pgh.pa.us         174         [ #  # ]:UBC           0 :             ereport(INFO,
                                175                 :                :                     (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
                                176                 :                :                      errmsg("operator family \"%s\" of access method %s contains operator %s with wrong signature",
                                177                 :                :                             opfamilyname, "hash",
                                178                 :                :                             format_operator(oprform->amopopr))));
                                179                 :              0 :             result = false;
                                180                 :                :         }
                                181                 :                : 
                                182                 :                :         /* There should be relevant hash functions for each datatype */
 3516 tgl@sss.pgh.pa.us         183         [ +  - ]:CBC         473 :         if (!list_member_oid(hashabletypes, oprform->amoplefttype) ||
                                184         [ -  + ]:            473 :             !list_member_oid(hashabletypes, oprform->amoprighttype))
                                185                 :                :         {
 3516 tgl@sss.pgh.pa.us         186         [ #  # ]:UBC           0 :             ereport(INFO,
                                187                 :                :                     (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
                                188                 :                :                      errmsg("operator family \"%s\" of access method %s lacks support function for operator %s",
                                189                 :                :                             opfamilyname, "hash",
                                190                 :                :                             format_operator(oprform->amopopr))));
                                191                 :              0 :             result = false;
                                192                 :                :         }
                                193                 :                :     }
                                194                 :                : 
                                195                 :                :     /* Now check for inconsistent groups of operators/functions */
 3516 tgl@sss.pgh.pa.us         196                 :CBC         140 :     grouplist = identify_opfamily_groups(oprlist, proclist);
                                197                 :            140 :     opclassgroup = NULL;
                                198   [ +  -  +  +  :            613 :     foreach(lc, grouplist)
                                              +  + ]
                                199                 :                :     {
                                200                 :            473 :         OpFamilyOpFuncGroup *thisgroup = (OpFamilyOpFuncGroup *) lfirst(lc);
                                201                 :                : 
                                202                 :                :         /* Remember the group exactly matching the test opclass */
                                203         [ +  + ]:            473 :         if (thisgroup->lefttype == opcintype &&
                                204         [ +  + ]:            193 :             thisgroup->righttype == opcintype)
                                205                 :            140 :             opclassgroup = thisgroup;
                                206                 :                : 
                                207                 :                :         /*
                                208                 :                :          * Complain if there seems to be an incomplete set of operators for
                                209                 :                :          * this datatype pair (implying that we have a hash function but no
                                210                 :                :          * operator).
                                211                 :                :          */
                                212         [ -  + ]:            473 :         if (thisgroup->operatorset != (1 << HTEqualStrategyNumber))
                                213                 :                :         {
 3516 tgl@sss.pgh.pa.us         214         [ #  # ]:UBC           0 :             ereport(INFO,
                                215                 :                :                     (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
                                216                 :                :                      errmsg("operator family \"%s\" of access method %s is missing operator(s) for types %s and %s",
                                217                 :                :                             opfamilyname, "hash",
                                218                 :                :                             format_type_be(thisgroup->lefttype),
                                219                 :                :                             format_type_be(thisgroup->righttype))));
                                220                 :              0 :             result = false;
                                221                 :                :         }
                                222                 :                :     }
                                223                 :                : 
                                224                 :                :     /* Check that the originally-named opclass is supported */
                                225                 :                :     /* (if group is there, we already checked it adequately above) */
 3516 tgl@sss.pgh.pa.us         226         [ -  + ]:CBC         140 :     if (!opclassgroup)
                                227                 :                :     {
 3516 tgl@sss.pgh.pa.us         228         [ #  # ]:UBC           0 :         ereport(INFO,
                                229                 :                :                 (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
                                230                 :                :                  errmsg("operator class \"%s\" of access method %s is missing operator(s)",
                                231                 :                :                         opclassname, "hash")));
                                232                 :              0 :         result = false;
                                233                 :                :     }
                                234                 :                : 
                                235                 :                :     /*
                                236                 :                :      * Complain if the opfamily doesn't have entries for all possible
                                237                 :                :      * combinations of its supported datatypes.  While missing cross-type
                                238                 :                :      * operators are not fatal, it seems reasonable to insist that all
                                239                 :                :      * built-in hash opfamilies be complete.
                                240                 :                :      */
 3516 tgl@sss.pgh.pa.us         241                 :CBC         140 :     if (list_length(grouplist) !=
                                242         [ +  + ]:            140 :         list_length(hashabletypes) * list_length(hashabletypes))
                                243                 :                :     {
                                244         [ +  - ]:              8 :         ereport(INFO,
                                245                 :                :                 (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
                                246                 :                :                  errmsg("operator family \"%s\" of access method %s is missing cross-type operator(s)",
                                247                 :                :                         opfamilyname, "hash")));
                                248                 :              8 :         result = false;
                                249                 :                :     }
                                250                 :                : 
 3520                           251                 :            140 :     ReleaseCatCacheList(proclist);
                                252                 :            140 :     ReleaseCatCacheList(oprlist);
 3516                           253                 :            140 :     ReleaseSysCache(classtup);
                                254                 :                : 
                                255                 :            140 :     return result;
                                256                 :                : }
                                257                 :                : 
                                258                 :                : 
                                259                 :                : /*
                                260                 :                :  * Prechecking function for adding operators/functions to a hash opfamily.
                                261                 :                :  */
                                262                 :                : void
 1862                           263                 :             81 : hashadjustmembers(Oid opfamilyoid,
                                264                 :                :                   Oid opclassoid,
                                265                 :                :                   List *operators,
                                266                 :                :                   List *functions)
                                267                 :                : {
                                268                 :                :     Oid         opcintype;
                                269                 :                :     ListCell   *lc;
                                270                 :                : 
                                271                 :                :     /*
                                272                 :                :      * Hash operators and required support functions are always "loose"
                                273                 :                :      * members of the opfamily if they are cross-type.  If they are not
                                274                 :                :      * cross-type, we prefer to tie them to the appropriate opclass ... but if
                                275                 :                :      * the user hasn't created one, we can't do that, and must fall back to
                                276                 :                :      * using the opfamily dependency.  (We mustn't force creation of an
                                277                 :                :      * opclass in such a case, as leaving an incomplete opclass laying about
                                278                 :                :      * would be bad.  Throwing an error is another undesirable alternative.)
                                279                 :                :      *
                                280                 :                :      * This behavior results in a bit of a dump/reload hazard, in that the
                                281                 :                :      * order of restoring objects could affect what dependencies we end up
                                282                 :                :      * with.  pg_dump's existing behavior will preserve the dependency choices
                                283                 :                :      * in most cases, but not if a cross-type operator has been bound tightly
                                284                 :                :      * into an opclass.  That's a mistake anyway, so silently "fixing" it
                                285                 :                :      * isn't awful.
                                286                 :                :      *
                                287                 :                :      * Optional support functions are always "loose" family members.
                                288                 :                :      *
                                289                 :                :      * To avoid repeated lookups, we remember the most recently used opclass's
                                290                 :                :      * input type.
                                291                 :                :      */
                                292         [ +  + ]:             81 :     if (OidIsValid(opclassoid))
                                293                 :                :     {
                                294                 :                :         /* During CREATE OPERATOR CLASS, need CCI to see the pg_opclass row */
                                295                 :             55 :         CommandCounterIncrement();
                                296                 :             55 :         opcintype = get_opclass_input_type(opclassoid);
                                297                 :                :     }
                                298                 :                :     else
                                299                 :             26 :         opcintype = InvalidOid;
                                300                 :                : 
                                301                 :                :     /*
                                302                 :                :      * We handle operators and support functions almost identically, so rather
                                303                 :                :      * than duplicate this code block, just join the lists.
                                304                 :                :      */
                                305   [ +  +  +  +  :            198 :     foreach(lc, list_concat_copy(operators, functions))
                                              +  + ]
                                306                 :                :     {
                                307                 :            117 :         OpFamilyMember *op = (OpFamilyMember *) lfirst(lc);
                                308                 :                : 
                                309   [ +  +  +  + ]:            117 :         if (op->is_func && op->number != HASHSTANDARD_PROC)
                                310                 :                :         {
                                311                 :                :             /* Optional support proc, so always a soft family dependency */
                                312                 :             29 :             op->ref_is_hard = false;
                                313                 :             29 :             op->ref_is_family = true;
                                314                 :             29 :             op->refobjid = opfamilyoid;
                                315                 :                :         }
                                316         [ +  + ]:             88 :         else if (op->lefttype != op->righttype)
                                317                 :                :         {
                                318                 :                :             /* Cross-type, so always a soft family dependency */
                                319                 :             23 :             op->ref_is_hard = false;
                                320                 :             23 :             op->ref_is_family = true;
                                321                 :             23 :             op->refobjid = opfamilyoid;
                                322                 :                :         }
                                323                 :                :         else
                                324                 :                :         {
                                325                 :                :             /* Not cross-type; is there a suitable opclass? */
                                326         [ +  + ]:             65 :             if (op->lefttype != opcintype)
                                327                 :                :             {
                                328                 :                :                 /* Avoid repeating this expensive lookup, even if it fails */
                                329                 :              3 :                 opcintype = op->lefttype;
                                330                 :              3 :                 opclassoid = opclass_for_family_datatype(HASH_AM_OID,
                                331                 :                :                                                          opfamilyoid,
                                332                 :                :                                                          opcintype);
                                333                 :                :             }
                                334         [ +  + ]:             65 :             if (OidIsValid(opclassoid))
                                335                 :                :             {
                                336                 :                :                 /* Hard dependency on opclass */
                                337                 :             62 :                 op->ref_is_hard = true;
                                338                 :             62 :                 op->ref_is_family = false;
                                339                 :             62 :                 op->refobjid = opclassoid;
                                340                 :                :             }
                                341                 :                :             else
                                342                 :                :             {
                                343                 :                :                 /* We're stuck, so make a soft dependency on the opfamily */
                                344                 :              3 :                 op->ref_is_hard = false;
                                345                 :              3 :                 op->ref_is_family = true;
                                346                 :              3 :                 op->refobjid = opfamilyoid;
                                347                 :                :             }
                                348                 :                :         }
                                349                 :                :     }
                                350                 :             81 : }
        

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