catcache.c File Reference

#include "postgres.h"
#include "access/genam.h"
#include "access/heaptoast.h"
#include "access/relscan.h"
#include "access/sysattr.h"
#include "access/table.h"
#include "access/xact.h"
#include "catalog/pg_collation.h"
#include "catalog/pg_operator.h"
#include "catalog/pg_type.h"
#include "common/hashfn.h"
#include "miscadmin.h"
#include "port/pg_bitutils.h"
#include "storage/lmgr.h"
#include "utils/builtins.h"
#include "utils/datum.h"
#include "utils/fmgroids.h"
#include "utils/inval.h"
#include "utils/memutils.h"
#include "utils/rel.h"
#include "utils/resowner_private.h"
#include "utils/syscache.h"

Include dependency graph for catcache.c:

Go to the source code of this file.

Macros
#define	HASH_INDEX(h, sz)   ((Index) ((h) & ((sz) - 1)))
#define	CACHE_elog(...)
#define	InitCatCache_DEBUG2
#define	CatalogCacheInitializeCache_DEBUG1
#define	CatalogCacheInitializeCache_DEBUG2

Functions
static HeapTuple	SearchCatCacheInternal (CatCache *cache, int nkeys, Datum v1, Datum v2, Datum v3, Datum v4)
static pg_noinline HeapTuple	SearchCatCacheMiss (CatCache *cache, int nkeys, uint32 hashValue, Index hashIndex, Datum v1, Datum v2, Datum v3, Datum v4)
static uint32	CatalogCacheComputeHashValue (CatCache *cache, int nkeys, Datum v1, Datum v2, Datum v3, Datum v4)
static uint32	CatalogCacheComputeTupleHashValue (CatCache *cache, int nkeys, HeapTuple tuple)
static bool	CatalogCacheCompareTuple (const CatCache *cache, int nkeys, const Datum *cachekeys, const Datum *searchkeys)
static void	CatCacheRemoveCTup (CatCache *cache, CatCTup *ct)
static void	CatCacheRemoveCList (CatCache *cache, CatCList *cl)
static void	CatalogCacheInitializeCache (CatCache *cache)
static CatCTup *	CatalogCacheCreateEntry (CatCache *cache, HeapTuple ntp, Datum *arguments, uint32 hashValue, Index hashIndex, bool negative)
static void	CatCacheFreeKeys (TupleDesc tupdesc, int nkeys, int *attnos, Datum *keys)
static void	CatCacheCopyKeys (TupleDesc tupdesc, int nkeys, int *attnos, Datum *srckeys, Datum *dstkeys)
static bool	chareqfast (Datum a, Datum b)
static uint32	charhashfast (Datum datum)
static bool	nameeqfast (Datum a, Datum b)
static uint32	namehashfast (Datum datum)
static bool	int2eqfast (Datum a, Datum b)
static uint32	int2hashfast (Datum datum)
static bool	int4eqfast (Datum a, Datum b)
static uint32	int4hashfast (Datum datum)
static bool	texteqfast (Datum a, Datum b)
static uint32	texthashfast (Datum datum)
static bool	oidvectoreqfast (Datum a, Datum b)
static uint32	oidvectorhashfast (Datum datum)
static void	GetCCHashEqFuncs (Oid keytype, CCHashFN *hashfunc, RegProcedure *eqfunc, CCFastEqualFN *fasteqfunc)
void	CatCacheInvalidate (CatCache *cache, uint32 hashValue)
void	CreateCacheMemoryContext (void)
static void	ResetCatalogCache (CatCache *cache)
void	ResetCatalogCaches (void)
void	CatalogCacheFlushCatalog (Oid catId)
CatCache *	InitCatCache (int id, Oid reloid, Oid indexoid, int nkeys, const int *key, int nbuckets)
static void	RehashCatCache (CatCache *cp)
void	InitCatCachePhase2 (CatCache *cache, bool touch_index)
static bool	IndexScanOK (CatCache *cache, ScanKey cur_skey)
HeapTuple	SearchCatCache (CatCache *cache, Datum v1, Datum v2, Datum v3, Datum v4)
HeapTuple	SearchCatCache1 (CatCache *cache, Datum v1)
HeapTuple	SearchCatCache2 (CatCache *cache, Datum v1, Datum v2)
HeapTuple	SearchCatCache3 (CatCache *cache, Datum v1, Datum v2, Datum v3)
HeapTuple	SearchCatCache4 (CatCache *cache, Datum v1, Datum v2, Datum v3, Datum v4)
void	ReleaseCatCache (HeapTuple tuple)
uint32	GetCatCacheHashValue (CatCache *cache, Datum v1, Datum v2, Datum v3, Datum v4)
CatCList *	SearchCatCacheList (CatCache *cache, int nkeys, Datum v1, Datum v2, Datum v3)
void	ReleaseCatCacheList (CatCList *list)
void	PrepareToInvalidateCacheTuple (Relation relation, HeapTuple tuple, HeapTuple newtuple, void(*function)(int, uint32, Oid))
void	PrintCatCacheLeakWarning (HeapTuple tuple)
void	PrintCatCacheListLeakWarning (CatCList *list)

Variables
static CatCacheHeader *	CacheHdr = NULL

Macro Definition Documentation

CACHE_elog

#define CACHE_elog

(

...

)

Definition at line 60 of file catcache.c.

CatalogCacheInitializeCache_DEBUG1

#define CatalogCacheInitializeCache_DEBUG1

Definition at line 911 of file catcache.c.

CatalogCacheInitializeCache_DEBUG2

#define CatalogCacheInitializeCache_DEBUG2

Definition at line 912 of file catcache.c.

HASH_INDEX

#define HASH_INDEX	(		h,
			sz
	)		((Index) ((h) & ((sz) - 1)))

Definition at line 50 of file catcache.c.

InitCatCache_DEBUG2

#define InitCatCache_DEBUG2

Definition at line 753 of file catcache.c.

Function Documentation

CatalogCacheCompareTuple()

static bool CatalogCacheCompareTuple ( const CatCache *  cache, int  nkeys, const Datum *  cachekeys, const Datum *  searchkeys  )

inlinestatic

Definition at line 368 of file catcache.c.

{
    const CCFastEqualFN *cc_fastequal = cache->cc_fastequal;
    int         i;
 
    for (i = 0; i < nkeys; i++)
    {
        if (!(cc_fastequal[i]) (cachekeys[i], searchkeys[i]))
            return false;
    }
    return true;
}

References catcache::cc_fastequal, and i.

Referenced by SearchCatCacheInternal(), and SearchCatCacheList().

CatalogCacheComputeHashValue()

static uint32 CatalogCacheComputeHashValue ( CatCache *  cache, int  nkeys, Datum  v1, Datum  v2, Datum  v3, Datum  v4  )

static

Definition at line 271 of file catcache.c.

{
    uint32      hashValue = 0;
    uint32      oneHash;
    CCHashFN   *cc_hashfunc = cache->cc_hashfunc;
 
    CACHE_elog(DEBUG2, "CatalogCacheComputeHashValue %s %d %p",
               cache->cc_relname, nkeys, cache);
 
    switch (nkeys)
    {
        case 4:
            oneHash = (cc_hashfunc[3]) (v4);
            hashValue ^= pg_rotate_left32(oneHash, 24);
            /* FALLTHROUGH */
        case 3:
            oneHash = (cc_hashfunc[2]) (v3);
            hashValue ^= pg_rotate_left32(oneHash, 16);
            /* FALLTHROUGH */
        case 2:
            oneHash = (cc_hashfunc[1]) (v2);
            hashValue ^= pg_rotate_left32(oneHash, 8);
            /* FALLTHROUGH */
        case 1:
            oneHash = (cc_hashfunc[0]) (v1);
            hashValue ^= oneHash;
            break;
        default:
            elog(FATAL, "wrong number of hash keys: %d", nkeys);
            break;
    }
 
    return hashValue;
}

References CACHE_elog, catcache::cc_hashfunc, catcache::cc_relname, DEBUG2, elog(), FATAL, and pg_rotate_left32().

Referenced by CatalogCacheComputeTupleHashValue(), GetCatCacheHashValue(), SearchCatCacheInternal(), and SearchCatCacheList().

CatalogCacheComputeTupleHashValue()

static uint32 CatalogCacheComputeTupleHashValue ( CatCache *  cache, int  nkeys, HeapTuple  tuple  )

static

Definition at line 313 of file catcache.c.

{
    Datum       v1 = 0,
                v2 = 0,
                v3 = 0,
                v4 = 0;
    bool        isNull = false;
    int        *cc_keyno = cache->cc_keyno;
    TupleDesc   cc_tupdesc = cache->cc_tupdesc;
 
    /* Now extract key fields from tuple, insert into scankey */
    switch (nkeys)
    {
        case 4:
            v4 = fastgetattr(tuple,
                             cc_keyno[3],
                             cc_tupdesc,
                             &isNull);
            Assert(!isNull);
            /* FALLTHROUGH */
        case 3:
            v3 = fastgetattr(tuple,
                             cc_keyno[2],
                             cc_tupdesc,
                             &isNull);
            Assert(!isNull);
            /* FALLTHROUGH */
        case 2:
            v2 = fastgetattr(tuple,
                             cc_keyno[1],
                             cc_tupdesc,
                             &isNull);
            Assert(!isNull);
            /* FALLTHROUGH */
        case 1:
            v1 = fastgetattr(tuple,
                             cc_keyno[0],
                             cc_tupdesc,
                             &isNull);
            Assert(!isNull);
            break;
        default:
            elog(FATAL, "wrong number of hash keys: %d", nkeys);
            break;
    }
 
    return CatalogCacheComputeHashValue(cache, nkeys, v1, v2, v3, v4);
}

References Assert(), CatalogCacheComputeHashValue(), catcache::cc_keyno, catcache::cc_tupdesc, elog(), fastgetattr(), and FATAL.

Referenced by PrepareToInvalidateCacheTuple(), and SearchCatCacheList().

CatalogCacheCreateEntry()

static CatCTup * CatalogCacheCreateEntry ( CatCache *  cache, HeapTuple  ntp, Datum *  arguments, uint32  hashValue, Index  hashIndex, bool  negative  )

static

Definition at line 1799 of file catcache.c.

{
    CatCTup    *ct;
    HeapTuple   dtp;
    MemoryContext oldcxt;
 
    /* negative entries have no tuple associated */
    if (ntp)
    {
        int         i;
 
        Assert(!negative);
 
        /*
         * If there are any out-of-line toasted fields in the tuple, expand
         * them in-line.  This saves cycles during later use of the catcache
         * entry, and also protects us against the possibility of the toast
         * tuples being freed before we attempt to fetch them, in case of
         * something using a slightly stale catcache entry.
         */
        if (HeapTupleHasExternal(ntp))
            dtp = toast_flatten_tuple(ntp, cache->cc_tupdesc);
        else
            dtp = ntp;
 
        /* Allocate memory for CatCTup and the cached tuple in one go */
        oldcxt = MemoryContextSwitchTo(CacheMemoryContext);
 
        ct = (CatCTup *) palloc(sizeof(CatCTup) +
                                MAXIMUM_ALIGNOF + dtp->t_len);
        ct->tuple.t_len = dtp->t_len;
        ct->tuple.t_self = dtp->t_self;
        ct->tuple.t_tableOid = dtp->t_tableOid;
        ct->tuple.t_data = (HeapTupleHeader)
            MAXALIGN(((char *) ct) + sizeof(CatCTup));
        /* copy tuple contents */
        memcpy((char *) ct->tuple.t_data,
               (const char *) dtp->t_data,
               dtp->t_len);
        MemoryContextSwitchTo(oldcxt);
 
        if (dtp != ntp)
            heap_freetuple(dtp);
 
        /* extract keys - they'll point into the tuple if not by-value */
        for (i = 0; i < cache->cc_nkeys; i++)
        {
            Datum       atp;
            bool        isnull;
 
            atp = heap_getattr(&ct->tuple,
                               cache->cc_keyno[i],
                               cache->cc_tupdesc,
                               &isnull);
            Assert(!isnull);
            ct->keys[i] = atp;
        }
    }
    else
    {
        Assert(negative);
        oldcxt = MemoryContextSwitchTo(CacheMemoryContext);
        ct = (CatCTup *) palloc(sizeof(CatCTup));
 
        /*
         * Store keys - they'll point into separately allocated memory if not
         * by-value.
         */
        CatCacheCopyKeys(cache->cc_tupdesc, cache->cc_nkeys, cache->cc_keyno,
                         arguments, ct->keys);
        MemoryContextSwitchTo(oldcxt);
    }
 
    /*
     * Finish initializing the CatCTup header, and add it to the cache's
     * linked list and counts.
     */
    ct->ct_magic = CT_MAGIC;
    ct->my_cache = cache;
    ct->c_list = NULL;
    ct->refcount = 0;           /* for the moment */
    ct->dead = false;
    ct->negative = negative;
    ct->hash_value = hashValue;
 
    dlist_push_head(&cache->cc_bucket[hashIndex], &ct->cache_elem);
 
    cache->cc_ntup++;
    CacheHdr->ch_ntup++;
 
    /*
     * If the hash table has become too full, enlarge the buckets array. Quite
     * arbitrarily, we enlarge when fill factor > 2.
     */
    if (cache->cc_ntup > cache->cc_nbuckets * 2)
        RehashCatCache(cache);
 
    return ct;
}

References Assert(), catctup::c_list, catctup::cache_elem, CacheHdr, CacheMemoryContext, CatCacheCopyKeys(), catcache::cc_bucket, catcache::cc_keyno, catcache::cc_nbuckets, catcache::cc_nkeys, catcache::cc_ntup, catcache::cc_tupdesc, catcacheheader::ch_ntup, catctup::ct_magic, CT_MAGIC, catctup::dead, dlist_push_head(), catctup::hash_value, heap_freetuple(), heap_getattr(), HeapTupleHasExternal, i, catctup::keys, MAXALIGN, MemoryContextSwitchTo(), catctup::my_cache, catctup::negative, palloc(), catctup::refcount, RehashCatCache(), HeapTupleData::t_data, HeapTupleData::t_len, HeapTupleData::t_self, HeapTupleData::t_tableOid, toast_flatten_tuple(), and catctup::tuple.

Referenced by SearchCatCacheList(), and SearchCatCacheMiss().

CatalogCacheFlushCatalog()

void CatalogCacheFlushCatalog

(

Oid

catId

)

Definition at line 713 of file catcache.c.

{
    slist_iter  iter;
 
    CACHE_elog(DEBUG2, "CatalogCacheFlushCatalog called for %u", catId);
 
    slist_foreach(iter, &CacheHdr->ch_caches)
    {
        CatCache   *cache = slist_container(CatCache, cc_next, iter.cur);
 
        /* Does this cache store tuples of the target catalog? */
        if (cache->cc_reloid == catId)
        {
            /* Yes, so flush all its contents */
            ResetCatalogCache(cache);
 
            /* Tell inval.c to call syscache callbacks for this cache */
            CallSyscacheCallbacks(cache->id, 0);
        }
    }
 
    CACHE_elog(DEBUG2, "end of CatalogCacheFlushCatalog call");
}

References CACHE_elog, CacheHdr, CallSyscacheCallbacks(), catcache::cc_reloid, catcacheheader::ch_caches, slist_iter::cur, DEBUG2, catcache::id, ResetCatalogCache(), slist_container, and slist_foreach.

Referenced by LocalExecuteInvalidationMessage().

CatalogCacheInitializeCache()

static void CatalogCacheInitializeCache ( CatCache *  cache )

static

Definition at line 916 of file catcache.c.

{
    Relation    relation;
    MemoryContext oldcxt;
    TupleDesc   tupdesc;
    int         i;
 
    CatalogCacheInitializeCache_DEBUG1;
 
    relation = table_open(cache->cc_reloid, AccessShareLock);
 
    /*
     * switch to the cache context so our allocations do not vanish at the end
     * of a transaction
     */
    Assert(CacheMemoryContext != NULL);
 
    oldcxt = MemoryContextSwitchTo(CacheMemoryContext);
 
    /*
     * copy the relcache's tuple descriptor to permanent cache storage
     */
    tupdesc = CreateTupleDescCopyConstr(RelationGetDescr(relation));
 
    /*
     * save the relation's name and relisshared flag, too (cc_relname is used
     * only for debugging purposes)
     */
    cache->cc_relname = pstrdup(RelationGetRelationName(relation));
    cache->cc_relisshared = RelationGetForm(relation)->relisshared;
 
    /*
     * return to the caller's memory context and close the rel
     */
    MemoryContextSwitchTo(oldcxt);
 
    table_close(relation, AccessShareLock);
 
    CACHE_elog(DEBUG2, "CatalogCacheInitializeCache: %s, %d keys",
               cache->cc_relname, cache->cc_nkeys);
 
    /*
     * initialize cache's key information
     */
    for (i = 0; i < cache->cc_nkeys; ++i)
    {
        Oid         keytype;
        RegProcedure eqfunc;
 
        CatalogCacheInitializeCache_DEBUG2;
 
        if (cache->cc_keyno[i] > 0)
        {
            Form_pg_attribute attr = TupleDescAttr(tupdesc,
                                                   cache->cc_keyno[i] - 1);
 
            keytype = attr->atttypid;
            /* cache key columns should always be NOT NULL */
            Assert(attr->attnotnull);
        }
        else
        {
            if (cache->cc_keyno[i] < 0)
                elog(FATAL, "sys attributes are not supported in caches");
            keytype = OIDOID;
        }
 
        GetCCHashEqFuncs(keytype,
                         &cache->cc_hashfunc[i],
                         &eqfunc,
                         &cache->cc_fastequal[i]);
 
        /*
         * Do equality-function lookup (we assume this won't need a catalog
         * lookup for any supported type)
         */
        fmgr_info_cxt(eqfunc,
                      &cache->cc_skey[i].sk_func,
                      CacheMemoryContext);
 
        /* Initialize sk_attno suitably for HeapKeyTest() and heap scans */
        cache->cc_skey[i].sk_attno = cache->cc_keyno[i];
 
        /* Fill in sk_strategy as well --- always standard equality */
        cache->cc_skey[i].sk_strategy = BTEqualStrategyNumber;
        cache->cc_skey[i].sk_subtype = InvalidOid;
        /* If a catcache key requires a collation, it must be C collation */
        cache->cc_skey[i].sk_collation = C_COLLATION_OID;
 
        CACHE_elog(DEBUG2, "CatalogCacheInitializeCache %s %d %p",
                   cache->cc_relname, i, cache);
    }
 
    /*
     * mark this cache fully initialized
     */
    cache->cc_tupdesc = tupdesc;
}

References AccessShareLock, Assert(), BTEqualStrategyNumber, CACHE_elog, CacheMemoryContext, CatalogCacheInitializeCache_DEBUG1, CatalogCacheInitializeCache_DEBUG2, catcache::cc_fastequal, catcache::cc_hashfunc, catcache::cc_keyno, catcache::cc_nkeys, catcache::cc_relisshared, catcache::cc_relname, catcache::cc_reloid, catcache::cc_skey, catcache::cc_tupdesc, CreateTupleDescCopyConstr(), DEBUG2, elog(), FATAL, fmgr_info_cxt(), GetCCHashEqFuncs(), i, InvalidOid, MemoryContextSwitchTo(), pstrdup(), RelationGetDescr, RelationGetForm, RelationGetRelationName, ScanKeyData::sk_attno, ScanKeyData::sk_collation, ScanKeyData::sk_func, ScanKeyData::sk_strategy, ScanKeyData::sk_subtype, table_close(), table_open(), and TupleDescAttr.

Referenced by GetCatCacheHashValue(), InitCatCachePhase2(), PrepareToInvalidateCacheTuple(), SearchCatCacheInternal(), and SearchCatCacheList().

CatCacheCopyKeys()

static void CatCacheCopyKeys ( TupleDesc  tupdesc, int  nkeys, int *  attnos, Datum *  srckeys, Datum *  dstkeys  )

static

Definition at line 1930 of file catcache.c.

{
    int         i;
 
    /*
     * XXX: memory and lookup performance could possibly be improved by
     * storing all keys in one allocation.
     */
 
    for (i = 0; i < nkeys; i++)
    {
        int         attnum = attnos[i];
        Form_pg_attribute att = TupleDescAttr(tupdesc, attnum - 1);
        Datum       src = srckeys[i];
        NameData    srcname;
 
        /*
         * Must be careful in case the caller passed a C string where a NAME
         * is wanted: convert the given argument to a correctly padded NAME.
         * Otherwise the memcpy() done by datumCopy() could fall off the end
         * of memory.
         */
        if (att->atttypid == NAMEOID)
        {
            namestrcpy(&srcname, DatumGetCString(src));
            src = NameGetDatum(&srcname);
        }
 
        dstkeys[i] = datumCopy(src,
                               att->attbyval,
                               att->attlen);
    }
}

References attnum, datumCopy(), DatumGetCString(), i, NameGetDatum(), namestrcpy(), and TupleDescAttr.

Referenced by CatalogCacheCreateEntry(), and SearchCatCacheList().

CatCacheFreeKeys()

static void CatCacheFreeKeys ( TupleDesc  tupdesc, int  nkeys, int *  attnos, Datum *  keys  )

static

Definition at line 1905 of file catcache.c.

{
    int         i;
 
    for (i = 0; i < nkeys; i++)
    {
        int         attnum = attnos[i];
        Form_pg_attribute att;
 
        /* system attribute are not supported in caches */
        Assert(attnum > 0);
 
        att = TupleDescAttr(tupdesc, attnum - 1);
 
        if (!att->attbyval)
            pfree(DatumGetPointer(keys[i]));
    }
}

References Assert(), attnum, DatumGetPointer(), i, pfree(), and TupleDescAttr.

Referenced by CatCacheRemoveCList(), and CatCacheRemoveCTup().

CatCacheInvalidate()

void CatCacheInvalidate	(	CatCache *	cache,
		uint32	hashValue
	)

Definition at line 546 of file catcache.c.

{
    Index       hashIndex;
    dlist_mutable_iter iter;
 
    CACHE_elog(DEBUG2, "CatCacheInvalidate: called");
 
    /*
     * We don't bother to check whether the cache has finished initialization
     * yet; if not, there will be no entries in it so no problem.
     */
 
    /*
     * Invalidate *all* CatCLists in this cache; it's too hard to tell which
     * searches might still be correct, so just zap 'em all.
     */
    dlist_foreach_modify(iter, &cache->cc_lists)
    {
        CatCList   *cl = dlist_container(CatCList, cache_elem, iter.cur);
 
        if (cl->refcount > 0)
            cl->dead = true;
        else
            CatCacheRemoveCList(cache, cl);
    }
 
    /*
     * inspect the proper hash bucket for tuple matches
     */
    hashIndex = HASH_INDEX(hashValue, cache->cc_nbuckets);
    dlist_foreach_modify(iter, &cache->cc_bucket[hashIndex])
    {
        CatCTup    *ct = dlist_container(CatCTup, cache_elem, iter.cur);
 
        if (hashValue == ct->hash_value)
        {
            if (ct->refcount > 0 ||
                (ct->c_list && ct->c_list->refcount > 0))
            {
                ct->dead = true;
                /* list, if any, was marked dead above */
                Assert(ct->c_list == NULL || ct->c_list->dead);
            }
            else
                CatCacheRemoveCTup(cache, ct);
            CACHE_elog(DEBUG2, "CatCacheInvalidate: invalidated");
#ifdef CATCACHE_STATS
            cache->cc_invals++;
#endif
            /* could be multiple matches, so keep looking! */
        }
    }
}

References Assert(), catctup::c_list, CACHE_elog, CatCacheRemoveCList(), CatCacheRemoveCTup(), catcache::cc_bucket, catcache::cc_lists, catcache::cc_nbuckets, dlist_mutable_iter::cur, catctup::dead, catclist::dead, DEBUG2, dlist_container, dlist_foreach_modify, HASH_INDEX, catctup::hash_value, catctup::refcount, and catclist::refcount.

Referenced by SysCacheInvalidate().

CatCacheRemoveCList()

static void CatCacheRemoveCList ( CatCache *  cache, CatCList *  cl  )

static

Definition at line 493 of file catcache.c.

{
    int         i;
 
    Assert(cl->refcount == 0);
    Assert(cl->my_cache == cache);
 
    /* delink from member tuples */
    for (i = cl->n_members; --i >= 0;)
    {
        CatCTup    *ct = cl->members[i];
 
        Assert(ct->c_list == cl);
        ct->c_list = NULL;
        /* if the member is dead and now has no references, remove it */
        if (
#ifndef CATCACHE_FORCE_RELEASE
            ct->dead &&
#endif
            ct->refcount == 0)
            CatCacheRemoveCTup(cache, ct);
    }
 
    /* delink from linked list */
    dlist_delete(&cl->cache_elem);
 
    /* free associated column data */
    CatCacheFreeKeys(cache->cc_tupdesc, cl->nkeys,
                     cache->cc_keyno, cl->keys);
 
    pfree(cl);
}

References Assert(), catctup::c_list, catclist::cache_elem, CatCacheFreeKeys(), CatCacheRemoveCTup(), catcache::cc_keyno, catcache::cc_tupdesc, catctup::dead, dlist_delete(), i, catclist::keys, catclist::members, catclist::my_cache, catclist::n_members, catclist::nkeys, pfree(), catctup::refcount, and catclist::refcount.

Referenced by CatCacheInvalidate(), CatCacheRemoveCTup(), ReleaseCatCacheList(), and ResetCatalogCache().

CatCacheRemoveCTup()

static void CatCacheRemoveCTup ( CatCache *  cache, CatCTup *  ct  )

static

Definition at line 451 of file catcache.c.

{
    Assert(ct->refcount == 0);
    Assert(ct->my_cache == cache);
 
    if (ct->c_list)
    {
        /*
         * The cleanest way to handle this is to call CatCacheRemoveCList,
         * which will recurse back to me, and the recursive call will do the
         * work.  Set the "dead" flag to make sure it does recurse.
         */
        ct->dead = true;
        CatCacheRemoveCList(cache, ct->c_list);
        return;                 /* nothing left to do */
    }
 
    /* delink from linked list */
    dlist_delete(&ct->cache_elem);
 
    /*
     * Free keys when we're dealing with a negative entry, normal entries just
     * point into tuple, allocated together with the CatCTup.
     */
    if (ct->negative)
        CatCacheFreeKeys(cache->cc_tupdesc, cache->cc_nkeys,
                         cache->cc_keyno, ct->keys);
 
    pfree(ct);
 
    --cache->cc_ntup;
    --CacheHdr->ch_ntup;
}

References Assert(), catctup::c_list, catctup::cache_elem, CacheHdr, CatCacheFreeKeys(), CatCacheRemoveCList(), catcache::cc_keyno, catcache::cc_nkeys, catcache::cc_ntup, catcache::cc_tupdesc, catcacheheader::ch_ntup, catctup::dead, dlist_delete(), catctup::keys, catctup::my_cache, catctup::negative, pfree(), and catctup::refcount.

Referenced by CatCacheInvalidate(), CatCacheRemoveCList(), ReleaseCatCache(), ResetCatalogCache(), and SearchCatCacheList().

chareqfast()

static bool chareqfast ( Datum  a, Datum  b  )

static

Definition at line 118 of file catcache.c.

{
    return DatumGetChar(a) == DatumGetChar(b);
}

References a, b, and DatumGetChar().

Referenced by GetCCHashEqFuncs().

charhashfast()

static uint32 charhashfast ( Datum  datum )

static

Definition at line 124 of file catcache.c.

{
    return murmurhash32((int32) DatumGetChar(datum));
}

References DatumGetChar(), and murmurhash32().

Referenced by GetCCHashEqFuncs().

CreateCacheMemoryContext()

void CreateCacheMemoryContext

(

void

)

Definition at line 614 of file catcache.c.

{
    /*
     * Purely for paranoia, check that context doesn't exist; caller probably
     * did so already.
     */
    if (!CacheMemoryContext)
        CacheMemoryContext = AllocSetContextCreate(TopMemoryContext,
                                                   "CacheMemoryContext",
                                                   ALLOCSET_DEFAULT_SIZES);
}

References ALLOCSET_DEFAULT_SIZES, AllocSetContextCreate, CacheMemoryContext, and TopMemoryContext.

Referenced by assign_record_type_typmod(), BuildEventTriggerCache(), init_ts_config_cache(), InitCatCache(), InitializeAttoptCache(), InitializeRelfilenumberMap(), InitializeTableSpaceCache(), lookup_ts_dictionary_cache(), lookup_ts_parser_cache(), lookup_type_cache(), LookupOpclassInfo(), RelationBuildLocalRelation(), and RelationCacheInitialize().

GetCatCacheHashValue()

uint32 GetCatCacheHashValue	(	CatCache *	cache,
		Datum	v1,
		Datum	v2,
		Datum	v3,
		Datum	v4
	)

Definition at line 1467 of file catcache.c.

{
    /*
     * one-time startup overhead for each cache
     */
    if (cache->cc_tupdesc == NULL)
        CatalogCacheInitializeCache(cache);
 
    /*
     * calculate the hash value
     */
    return CatalogCacheComputeHashValue(cache, cache->cc_nkeys, v1, v2, v3, v4);
}

References CatalogCacheComputeHashValue(), CatalogCacheInitializeCache(), catcache::cc_nkeys, and catcache::cc_tupdesc.

Referenced by GetSysCacheHashValue().

GetCCHashEqFuncs()

static void GetCCHashEqFuncs ( Oid  keytype, CCHashFN *  hashfunc, RegProcedure *  eqfunc, CCFastEqualFN *  fasteqfunc  )

static

Definition at line 201 of file catcache.c.

{
    switch (keytype)
    {
        case BOOLOID:
            *hashfunc = charhashfast;
            *fasteqfunc = chareqfast;
            *eqfunc = F_BOOLEQ;
            break;
        case CHAROID:
            *hashfunc = charhashfast;
            *fasteqfunc = chareqfast;
            *eqfunc = F_CHAREQ;
            break;
        case NAMEOID:
            *hashfunc = namehashfast;
            *fasteqfunc = nameeqfast;
            *eqfunc = F_NAMEEQ;
            break;
        case INT2OID:
            *hashfunc = int2hashfast;
            *fasteqfunc = int2eqfast;
            *eqfunc = F_INT2EQ;
            break;
        case INT4OID:
            *hashfunc = int4hashfast;
            *fasteqfunc = int4eqfast;
            *eqfunc = F_INT4EQ;
            break;
        case TEXTOID:
            *hashfunc = texthashfast;
            *fasteqfunc = texteqfast;
            *eqfunc = F_TEXTEQ;
            break;
        case OIDOID:
        case REGPROCOID:
        case REGPROCEDUREOID:
        case REGOPEROID:
        case REGOPERATOROID:
        case REGCLASSOID:
        case REGTYPEOID:
        case REGCOLLATIONOID:
        case REGCONFIGOID:
        case REGDICTIONARYOID:
        case REGROLEOID:
        case REGNAMESPACEOID:
            *hashfunc = int4hashfast;
            *fasteqfunc = int4eqfast;
            *eqfunc = F_OIDEQ;
            break;
        case OIDVECTOROID:
            *hashfunc = oidvectorhashfast;
            *fasteqfunc = oidvectoreqfast;
            *eqfunc = F_OIDVECTOREQ;
            break;
        default:
            elog(FATAL, "type %u not supported as catcache key", keytype);
            *hashfunc = NULL;   /* keep compiler quiet */
 
            *eqfunc = InvalidOid;
            break;
    }
}

References chareqfast(), charhashfast(), elog(), FATAL, int2eqfast(), int2hashfast(), int4eqfast(), int4hashfast(), InvalidOid, nameeqfast(), namehashfast(), oidvectoreqfast(), oidvectorhashfast(), texteqfast(), and texthashfast().

Referenced by CatalogCacheInitializeCache().

IndexScanOK()

static bool IndexScanOK ( CatCache *  cache, ScanKey  cur_skey  )

static

Definition at line 1077 of file catcache.c.

{
    switch (cache->id)
    {
        case INDEXRELID:
 
            /*
             * Rather than tracking exactly which indexes have to be loaded
             * before we can use indexscans (which changes from time to time),
             * just force all pg_index searches to be heap scans until we've
             * built the critical relcaches.
             */
            if (!criticalRelcachesBuilt)
                return false;
            break;
 
        case AMOID:
        case AMNAME:
 
            /*
             * Always do heap scans in pg_am, because it's so small there's
             * not much point in an indexscan anyway.  We *must* do this when
             * initially building critical relcache entries, but we might as
             * well just always do it.
             */
            return false;
 
        case AUTHNAME:
        case AUTHOID:
        case AUTHMEMMEMROLE:
        case DATABASEOID:
 
            /*
             * Protect authentication lookups occurring before relcache has
             * collected entries for shared indexes.
             */
            if (!criticalSharedRelcachesBuilt)
                return false;
            break;
 
        default:
            break;
    }
 
    /* Normal case, allow index scan */
    return true;
}

References AMNAME, AMOID, AUTHMEMMEMROLE, AUTHNAME, AUTHOID, criticalRelcachesBuilt, criticalSharedRelcachesBuilt, DATABASEOID, catcache::id, and INDEXRELID.

Referenced by SearchCatCacheList(), and SearchCatCacheMiss().

InitCatCache()

CatCache* InitCatCache	(	int	id,
		Oid	reloid,
		Oid	indexoid,
		int	nkeys,
		const int *	key,
		int	nbuckets
	)

Definition at line 757 of file catcache.c.

{
    CatCache   *cp;
    MemoryContext oldcxt;
    int         i;
 
    /*
     * nbuckets is the initial number of hash buckets to use in this catcache.
     * It will be enlarged later if it becomes too full.
     *
     * nbuckets must be a power of two.  We check this via Assert rather than
     * a full runtime check because the values will be coming from constant
     * tables.
     *
     * If you're confused by the power-of-two check, see comments in
     * bitmapset.c for an explanation.
     */
    Assert(nbuckets > 0 && (nbuckets & -nbuckets) == nbuckets);
 
    /*
     * first switch to the cache context so our allocations do not vanish at
     * the end of a transaction
     */
    if (!CacheMemoryContext)
        CreateCacheMemoryContext();
 
    oldcxt = MemoryContextSwitchTo(CacheMemoryContext);
 
    /*
     * if first time through, initialize the cache group header
     */
    if (CacheHdr == NULL)
    {
        CacheHdr = (CatCacheHeader *) palloc(sizeof(CatCacheHeader));
        slist_init(&CacheHdr->ch_caches);
        CacheHdr->ch_ntup = 0;
#ifdef CATCACHE_STATS
        /* set up to dump stats at backend exit */
        on_proc_exit(CatCachePrintStats, 0);
#endif
    }
 
    /*
     * Allocate a new cache structure, aligning to a cacheline boundary
     *
     * Note: we rely on zeroing to initialize all the dlist headers correctly
     */
    cp = (CatCache *) palloc_aligned(sizeof(CatCache), PG_CACHE_LINE_SIZE,
                                     MCXT_ALLOC_ZERO);
    cp->cc_bucket = palloc0(nbuckets * sizeof(dlist_head));
 
    /*
     * initialize the cache's relation information for the relation
     * corresponding to this cache, and initialize some of the new cache's
     * other internal fields.  But don't open the relation yet.
     */
    cp->id = id;
    cp->cc_relname = "(not known yet)";
    cp->cc_reloid = reloid;
    cp->cc_indexoid = indexoid;
    cp->cc_relisshared = false; /* temporary */
    cp->cc_tupdesc = (TupleDesc) NULL;
    cp->cc_ntup = 0;
    cp->cc_nbuckets = nbuckets;
    cp->cc_nkeys = nkeys;
    for (i = 0; i < nkeys; ++i)
        cp->cc_keyno[i] = key[i];
 
    /*
     * new cache is initialized as far as we can go for now. print some
     * debugging information, if appropriate.
     */
    InitCatCache_DEBUG2;
 
    /*
     * add completed cache to top of group header's list
     */
    slist_push_head(&CacheHdr->ch_caches, &cp->cc_next);
 
    /*
     * back to the old context before we return...
     */
    MemoryContextSwitchTo(oldcxt);
 
    return cp;
}

References Assert(), CacheHdr, CacheMemoryContext, catcache::cc_bucket, catcache::cc_indexoid, catcache::cc_keyno, catcache::cc_nbuckets, catcache::cc_next, catcache::cc_nkeys, catcache::cc_ntup, catcache::cc_relisshared, catcache::cc_relname, catcache::cc_reloid, catcache::cc_tupdesc, catcacheheader::ch_caches, catcacheheader::ch_ntup, CreateCacheMemoryContext(), i, catcache::id, InitCatCache_DEBUG2, sort-test::key, MCXT_ALLOC_ZERO, MemoryContextSwitchTo(), on_proc_exit(), palloc(), palloc0(), palloc_aligned(), PG_CACHE_LINE_SIZE, slist_init(), and slist_push_head().

Referenced by InitCatalogCache().

InitCatCachePhase2()

void InitCatCachePhase2	(	CatCache *	cache,
		bool	touch_index
	)

Definition at line 1025 of file catcache.c.

{
    if (cache->cc_tupdesc == NULL)
        CatalogCacheInitializeCache(cache);
 
    if (touch_index &&
        cache->id != AMOID &&
        cache->id != AMNAME)
    {
        Relation    idesc;
 
        /*
         * We must lock the underlying catalog before opening the index to
         * avoid deadlock, since index_open could possibly result in reading
         * this same catalog, and if anyone else is exclusive-locking this
         * catalog and index they'll be doing it in that order.
         */
        LockRelationOid(cache->cc_reloid, AccessShareLock);
        idesc = index_open(cache->cc_indexoid, AccessShareLock);
 
        /*
         * While we've got the index open, let's check that it's unique (and
         * not just deferrable-unique, thank you very much).  This is just to
         * catch thinkos in definitions of new catcaches, so we don't worry
         * about the pg_am indexes not getting tested.
         */
        Assert(idesc->rd_index->indisunique &&
               idesc->rd_index->indimmediate);
 
        index_close(idesc, AccessShareLock);
        UnlockRelationOid(cache->cc_reloid, AccessShareLock);
    }
}

References AccessShareLock, AMNAME, AMOID, Assert(), CatalogCacheInitializeCache(), catcache::cc_indexoid, catcache::cc_reloid, catcache::cc_tupdesc, catcache::id, index_close(), index_open(), LockRelationOid(), RelationData::rd_index, and UnlockRelationOid().

Referenced by InitCatalogCachePhase2(), and SysCacheGetAttr().

int2eqfast()

static bool int2eqfast ( Datum  a, Datum  b  )

static

Definition at line 147 of file catcache.c.

{
    return DatumGetInt16(a) == DatumGetInt16(b);
}

References a, b, and DatumGetInt16().

Referenced by GetCCHashEqFuncs().

int2hashfast()

static uint32 int2hashfast ( Datum  datum )

static

Definition at line 153 of file catcache.c.

{
    return murmurhash32((int32) DatumGetInt16(datum));
}

References DatumGetInt16(), and murmurhash32().

Referenced by GetCCHashEqFuncs().

int4eqfast()

static bool int4eqfast ( Datum  a, Datum  b  )

static

Definition at line 159 of file catcache.c.

{
    return DatumGetInt32(a) == DatumGetInt32(b);
}

References a, b, and DatumGetInt32().

Referenced by GetCCHashEqFuncs().

int4hashfast()

static uint32 int4hashfast ( Datum  datum )

static

Definition at line 165 of file catcache.c.

{
    return murmurhash32((int32) DatumGetInt32(datum));
}

References DatumGetInt32(), and murmurhash32().

Referenced by GetCCHashEqFuncs().

nameeqfast()

static bool nameeqfast ( Datum  a, Datum  b  )

static

Definition at line 130 of file catcache.c.

{
    char       *ca = NameStr(*DatumGetName(a));
    char       *cb = NameStr(*DatumGetName(b));
 
    return strncmp(ca, cb, NAMEDATALEN) == 0;
}

References a, b, DatumGetName(), NAMEDATALEN, and NameStr.

Referenced by GetCCHashEqFuncs().

namehashfast()

static uint32 namehashfast ( Datum  datum )

static

Definition at line 139 of file catcache.c.

{
    char       *key = NameStr(*DatumGetName(datum));
 
    return hash_any((unsigned char *) key, strlen(key));
}

References DatumGetName(), hash_any(), sort-test::key, and NameStr.

Referenced by GetCCHashEqFuncs().

oidvectoreqfast()

static bool oidvectoreqfast ( Datum  a, Datum  b  )

static

Definition at line 188 of file catcache.c.

{
    return DatumGetBool(DirectFunctionCall2(oidvectoreq, a, b));
}

References a, b, DatumGetBool(), DirectFunctionCall2, and oidvectoreq().

Referenced by GetCCHashEqFuncs().

oidvectorhashfast()

static uint32 oidvectorhashfast ( Datum  datum )

static

Definition at line 194 of file catcache.c.

{
    return DatumGetInt32(DirectFunctionCall1(hashoidvector, datum));
}

References DatumGetInt32(), DirectFunctionCall1, and hashoidvector().

Referenced by GetCCHashEqFuncs().

PrepareToInvalidateCacheTuple()

void PrepareToInvalidateCacheTuple	(	Relation	relation,
		HeapTuple	tuple,
		HeapTuple	newtuple,
		void(*)(int, uint32, Oid)	function
	)

Definition at line 2000 of file catcache.c.

{
    slist_iter  iter;
    Oid         reloid;
 
    CACHE_elog(DEBUG2, "PrepareToInvalidateCacheTuple: called");
 
    /*
     * sanity checks
     */
    Assert(RelationIsValid(relation));
    Assert(HeapTupleIsValid(tuple));
    Assert(PointerIsValid(function));
    Assert(CacheHdr != NULL);
 
    reloid = RelationGetRelid(relation);
 
    /* ----------------
     *  for each cache
     *     if the cache contains tuples from the specified relation
     *         compute the tuple's hash value(s) in this cache,
     *         and call the passed function to register the information.
     * ----------------
     */
 
    slist_foreach(iter, &CacheHdr->ch_caches)
    {
        CatCache   *ccp = slist_container(CatCache, cc_next, iter.cur);
        uint32      hashvalue;
        Oid         dbid;
 
        if (ccp->cc_reloid != reloid)
            continue;
 
        /* Just in case cache hasn't finished initialization yet... */
        if (ccp->cc_tupdesc == NULL)
            CatalogCacheInitializeCache(ccp);
 
        hashvalue = CatalogCacheComputeTupleHashValue(ccp, ccp->cc_nkeys, tuple);
        dbid = ccp->cc_relisshared ? (Oid) 0 : MyDatabaseId;
 
        (*function) (ccp->id, hashvalue, dbid);
 
        if (newtuple)
        {
            uint32      newhashvalue;
 
            newhashvalue = CatalogCacheComputeTupleHashValue(ccp, ccp->cc_nkeys, newtuple);
 
            if (newhashvalue != hashvalue)
                (*function) (ccp->id, newhashvalue, dbid);
        }
    }
}

References Assert(), CACHE_elog, CacheHdr, CatalogCacheComputeTupleHashValue(), CatalogCacheInitializeCache(), catcache::cc_nkeys, catcache::cc_relisshared, catcache::cc_reloid, catcache::cc_tupdesc, catcacheheader::ch_caches, slist_iter::cur, DEBUG2, HeapTupleIsValid, catcache::id, MyDatabaseId, PointerIsValid, RelationGetRelid, RelationIsValid, slist_container, and slist_foreach.

Referenced by CacheInvalidateHeapTuple().

PrintCatCacheLeakWarning()

void PrintCatCacheLeakWarning

(

HeapTuple

tuple

)

Definition at line 2064 of file catcache.c.

{
    CatCTup    *ct = (CatCTup *) (((char *) tuple) -
                                  offsetof(CatCTup, tuple));
 
    /* Safety check to ensure we were handed a cache entry */
    Assert(ct->ct_magic == CT_MAGIC);
 
    elog(WARNING, "cache reference leak: cache %s (%d), tuple %u/%u has count %d",
         ct->my_cache->cc_relname, ct->my_cache->id,
         ItemPointerGetBlockNumber(&(tuple->t_self)),
         ItemPointerGetOffsetNumber(&(tuple->t_self)),
         ct->refcount);
}

References Assert(), catcache::cc_relname, catctup::ct_magic, CT_MAGIC, elog(), catcache::id, ItemPointerGetBlockNumber(), ItemPointerGetOffsetNumber(), catctup::my_cache, catctup::refcount, HeapTupleData::t_self, and WARNING.

Referenced by ResourceOwnerReleaseInternal().

PrintCatCacheListLeakWarning()

void PrintCatCacheListLeakWarning

(

CatCList *

list

)

Definition at line 2080 of file catcache.c.

{
    elog(WARNING, "cache reference leak: cache %s (%d), list %p has count %d",
         list->my_cache->cc_relname, list->my_cache->id,
         list, list->refcount);
}

References elog(), sort-test::list, and WARNING.

Referenced by ResourceOwnerReleaseInternal().

RehashCatCache()

static void RehashCatCache ( CatCache *  cp )

static

Definition at line 853 of file catcache.c.

{
    dlist_head *newbucket;
    int         newnbuckets;
    int         i;
 
    elog(DEBUG1, "rehashing catalog cache id %d for %s; %d tups, %d buckets",
         cp->id, cp->cc_relname, cp->cc_ntup, cp->cc_nbuckets);
 
    /* Allocate a new, larger, hash table. */
    newnbuckets = cp->cc_nbuckets * 2;
    newbucket = (dlist_head *) MemoryContextAllocZero(CacheMemoryContext, newnbuckets * sizeof(dlist_head));
 
    /* Move all entries from old hash table to new. */
    for (i = 0; i < cp->cc_nbuckets; i++)
    {
        dlist_mutable_iter iter;
 
        dlist_foreach_modify(iter, &cp->cc_bucket[i])
        {
            CatCTup    *ct = dlist_container(CatCTup, cache_elem, iter.cur);
            int         hashIndex = HASH_INDEX(ct->hash_value, newnbuckets);
 
            dlist_delete(iter.cur);
            dlist_push_head(&newbucket[hashIndex], &ct->cache_elem);
        }
    }
 
    /* Switch to the new array. */
    pfree(cp->cc_bucket);
    cp->cc_nbuckets = newnbuckets;
    cp->cc_bucket = newbucket;
}

References catctup::cache_elem, CacheMemoryContext, catcache::cc_bucket, catcache::cc_nbuckets, catcache::cc_ntup, catcache::cc_relname, dlist_mutable_iter::cur, DEBUG1, dlist_container, dlist_delete(), dlist_foreach_modify, dlist_push_head(), elog(), HASH_INDEX, catctup::hash_value, i, catcache::id, MemoryContextAllocZero(), and pfree().

Referenced by CatalogCacheCreateEntry().

ReleaseCatCache()

void ReleaseCatCache

(

HeapTuple

tuple

)

Definition at line 1435 of file catcache.c.

{
    CatCTup    *ct = (CatCTup *) (((char *) tuple) -
                                  offsetof(CatCTup, tuple));
 
    /* Safety checks to ensure we were handed a cache entry */
    Assert(ct->ct_magic == CT_MAGIC);
    Assert(ct->refcount > 0);
 
    ct->refcount--;
    ResourceOwnerForgetCatCacheRef(CurrentResourceOwner, &ct->tuple);
 
    if (
#ifndef CATCACHE_FORCE_RELEASE
        ct->dead &&
#endif
        ct->refcount == 0 &&
        (ct->c_list == NULL || ct->c_list->refcount == 0))
        CatCacheRemoveCTup(ct->my_cache, ct);
}

References Assert(), catctup::c_list, CatCacheRemoveCTup(), catctup::ct_magic, CT_MAGIC, CurrentResourceOwner, catctup::dead, catctup::my_cache, catctup::refcount, catclist::refcount, ResourceOwnerForgetCatCacheRef(), and catctup::tuple.

Referenced by ReleaseSysCache(), and ResourceOwnerReleaseInternal().

ReleaseCatCacheList()

void ReleaseCatCacheList

(

CatCList *

list

)

Definition at line 1776 of file catcache.c.

{
    /* Safety checks to ensure we were handed a cache entry */
    Assert(list->cl_magic == CL_MAGIC);
    Assert(list->refcount > 0);
    list->refcount--;
    ResourceOwnerForgetCatCacheListRef(CurrentResourceOwner, list);
 
    if (
#ifndef CATCACHE_FORCE_RELEASE
        list->dead &&
#endif
        list->refcount == 0)
        CatCacheRemoveCList(list->my_cache, list);
}

References Assert(), CatCacheRemoveCList(), CL_MAGIC, CurrentResourceOwner, sort-test::list, and ResourceOwnerForgetCatCacheListRef().

Referenced by AddEnumLabel(), blvalidate(), brinvalidate(), btvalidate(), ginvalidate(), gistvalidate(), hashvalidate(), opclass_for_family_datatype(), RenameEnumLabel(), ResourceOwnerReleaseInternal(), sepgsql_relation_drop(), spgvalidate(), and transformFrameOffset().

ResetCatalogCache()

static void ResetCatalogCache ( CatCache *  cache )

static

Definition at line 636 of file catcache.c.

{
    dlist_mutable_iter iter;
    int         i;
 
    /* Remove each list in this cache, or at least mark it dead */
    dlist_foreach_modify(iter, &cache->cc_lists)
    {
        CatCList   *cl = dlist_container(CatCList, cache_elem, iter.cur);
 
        if (cl->refcount > 0)
            cl->dead = true;
        else
            CatCacheRemoveCList(cache, cl);
    }
 
    /* Remove each tuple in this cache, or at least mark it dead */
    for (i = 0; i < cache->cc_nbuckets; i++)
    {
        dlist_head *bucket = &cache->cc_bucket[i];
 
        dlist_foreach_modify(iter, bucket)
        {
            CatCTup    *ct = dlist_container(CatCTup, cache_elem, iter.cur);
 
            if (ct->refcount > 0 ||
                (ct->c_list && ct->c_list->refcount > 0))
            {
                ct->dead = true;
                /* list, if any, was marked dead above */
                Assert(ct->c_list == NULL || ct->c_list->dead);
            }
            else
                CatCacheRemoveCTup(cache, ct);
#ifdef CATCACHE_STATS
            cache->cc_invals++;
#endif
        }
    }
}

References Assert(), catctup::c_list, CatCacheRemoveCList(), CatCacheRemoveCTup(), catcache::cc_bucket, catcache::cc_lists, catcache::cc_nbuckets, dlist_mutable_iter::cur, catctup::dead, catclist::dead, dlist_container, dlist_foreach_modify, i, catctup::refcount, and catclist::refcount.

Referenced by CatalogCacheFlushCatalog(), and ResetCatalogCaches().

ResetCatalogCaches()

void ResetCatalogCaches

(

void

)

Definition at line 683 of file catcache.c.

{
    slist_iter  iter;
 
    CACHE_elog(DEBUG2, "ResetCatalogCaches called");
 
    slist_foreach(iter, &CacheHdr->ch_caches)
    {
        CatCache   *cache = slist_container(CatCache, cc_next, iter.cur);
 
        ResetCatalogCache(cache);
    }
 
    CACHE_elog(DEBUG2, "end of ResetCatalogCaches call");
}

References CACHE_elog, CacheHdr, catcacheheader::ch_caches, slist_iter::cur, DEBUG2, ResetCatalogCache(), slist_container, and slist_foreach.

Referenced by InvalidateSystemCachesExtended().

SearchCatCache()

HeapTuple SearchCatCache	(	CatCache *	cache,
		Datum	v1,
		Datum	v2,
		Datum	v3,
		Datum	v4
	)

Definition at line 1142 of file catcache.c.

{
    return SearchCatCacheInternal(cache, cache->cc_nkeys, v1, v2, v3, v4);
}

References catcache::cc_nkeys, and SearchCatCacheInternal().

Referenced by SearchSysCache().

SearchCatCache1()

HeapTuple SearchCatCache1	(	CatCache *	cache,
		Datum	v1
	)

Definition at line 1159 of file catcache.c.

{
    return SearchCatCacheInternal(cache, 1, v1, 0, 0, 0);
}

References SearchCatCacheInternal().

Referenced by SearchSysCache1().

SearchCatCache2()

HeapTuple SearchCatCache2	(	CatCache *	cache,
		Datum	v1,
		Datum	v2
	)

Definition at line 1167 of file catcache.c.

{
    return SearchCatCacheInternal(cache, 2, v1, v2, 0, 0);
}

References SearchCatCacheInternal().

Referenced by SearchSysCache2().

SearchCatCache3()

HeapTuple SearchCatCache3	(	CatCache *	cache,
		Datum	v1,
		Datum	v2,
		Datum	v3
	)

Definition at line 1175 of file catcache.c.

{
    return SearchCatCacheInternal(cache, 3, v1, v2, v3, 0);
}

References SearchCatCacheInternal().

Referenced by SearchSysCache3().

SearchCatCache4()

HeapTuple SearchCatCache4	(	CatCache *	cache,
		Datum	v1,
		Datum	v2,
		Datum	v3,
		Datum	v4
	)

Definition at line 1183 of file catcache.c.

{
    return SearchCatCacheInternal(cache, 4, v1, v2, v3, v4);
}

References SearchCatCacheInternal().

Referenced by SearchSysCache4().

SearchCatCacheInternal()

static HeapTuple SearchCatCacheInternal ( CatCache *  cache, int  nkeys, Datum  v1, Datum  v2, Datum  v3, Datum  v4  )

inlinestatic

Definition at line 1193 of file catcache.c.

{
    Datum       arguments[CATCACHE_MAXKEYS];
    uint32      hashValue;
    Index       hashIndex;
    dlist_iter  iter;
    dlist_head *bucket;
    CatCTup    *ct;
 
    /* Make sure we're in an xact, even if this ends up being a cache hit */
    Assert(IsTransactionState());
 
    Assert(cache->cc_nkeys == nkeys);
 
    /*
     * one-time startup overhead for each cache
     */
    if (unlikely(cache->cc_tupdesc == NULL))
        CatalogCacheInitializeCache(cache);
 
#ifdef CATCACHE_STATS
    cache->cc_searches++;
#endif
 
    /* Initialize local parameter array */
    arguments[0] = v1;
    arguments[1] = v2;
    arguments[2] = v3;
    arguments[3] = v4;
 
    /*
     * find the hash bucket in which to look for the tuple
     */
    hashValue = CatalogCacheComputeHashValue(cache, nkeys, v1, v2, v3, v4);
    hashIndex = HASH_INDEX(hashValue, cache->cc_nbuckets);
 
    /*
     * scan the hash bucket until we find a match or exhaust our tuples
     *
     * Note: it's okay to use dlist_foreach here, even though we modify the
     * dlist within the loop, because we don't continue the loop afterwards.
     */
    bucket = &cache->cc_bucket[hashIndex];
    dlist_foreach(iter, bucket)
    {
        ct = dlist_container(CatCTup, cache_elem, iter.cur);
 
        if (ct->dead)
            continue;           /* ignore dead entries */
 
        if (ct->hash_value != hashValue)
            continue;           /* quickly skip entry if wrong hash val */
 
        if (!CatalogCacheCompareTuple(cache, nkeys, ct->keys, arguments))
            continue;
 
        /*
         * We found a match in the cache.  Move it to the front of the list
         * for its hashbucket, in order to speed subsequent searches.  (The
         * most frequently accessed elements in any hashbucket will tend to be
         * near the front of the hashbucket's list.)
         */
        dlist_move_head(bucket, &ct->cache_elem);
 
        /*
         * If it's a positive entry, bump its refcount and return it. If it's
         * negative, we can report failure to the caller.
         */
        if (!ct->negative)
        {
            ResourceOwnerEnlargeCatCacheRefs(CurrentResourceOwner);
            ct->refcount++;
            ResourceOwnerRememberCatCacheRef(CurrentResourceOwner, &ct->tuple);
 
            CACHE_elog(DEBUG2, "SearchCatCache(%s): found in bucket %d",
                       cache->cc_relname, hashIndex);
 
#ifdef CATCACHE_STATS
            cache->cc_hits++;
#endif
 
            return &ct->tuple;
        }
        else
        {
            CACHE_elog(DEBUG2, "SearchCatCache(%s): found neg entry in bucket %d",
                       cache->cc_relname, hashIndex);
 
#ifdef CATCACHE_STATS
            cache->cc_neg_hits++;
#endif
 
            return NULL;
        }
    }
 
    return SearchCatCacheMiss(cache, nkeys, hashValue, hashIndex, v1, v2, v3, v4);
}

References Assert(), catctup::cache_elem, CACHE_elog, CatalogCacheCompareTuple(), CatalogCacheComputeHashValue(), CatalogCacheInitializeCache(), CATCACHE_MAXKEYS, catcache::cc_bucket, catcache::cc_nbuckets, catcache::cc_nkeys, catcache::cc_relname, catcache::cc_tupdesc, dlist_iter::cur, CurrentResourceOwner, catctup::dead, DEBUG2, dlist_container, dlist_foreach, dlist_move_head(), HASH_INDEX, catctup::hash_value, IsTransactionState(), catctup::keys, catctup::negative, catctup::refcount, ResourceOwnerEnlargeCatCacheRefs(), ResourceOwnerRememberCatCacheRef(), SearchCatCacheMiss(), catctup::tuple, and unlikely.

Referenced by SearchCatCache(), SearchCatCache1(), SearchCatCache2(), SearchCatCache3(), and SearchCatCache4().

SearchCatCacheList()

CatCList* SearchCatCacheList	(	CatCache *	cache,
		int	nkeys,
		Datum	v1,
		Datum	v2,
		Datum	v3
	)

Definition at line 1501 of file catcache.c.

{
    Datum       v4 = 0;         /* dummy last-column value */
    Datum       arguments[CATCACHE_MAXKEYS];
    uint32      lHashValue;
    dlist_iter  iter;
    CatCList   *cl;
    CatCTup    *ct;
    List       *volatile ctlist;
    ListCell   *ctlist_item;
    int         nmembers;
    bool        ordered;
    HeapTuple   ntp;
    MemoryContext oldcxt;
    int         i;
 
    /*
     * one-time startup overhead for each cache
     */
    if (cache->cc_tupdesc == NULL)
        CatalogCacheInitializeCache(cache);
 
    Assert(nkeys > 0 && nkeys < cache->cc_nkeys);
 
#ifdef CATCACHE_STATS
    cache->cc_lsearches++;
#endif
 
    /* Initialize local parameter array */
    arguments[0] = v1;
    arguments[1] = v2;
    arguments[2] = v3;
    arguments[3] = v4;
 
    /*
     * compute a hash value of the given keys for faster search.  We don't
     * presently divide the CatCList items into buckets, but this still lets
     * us skip non-matching items quickly most of the time.
     */
    lHashValue = CatalogCacheComputeHashValue(cache, nkeys, v1, v2, v3, v4);
 
    /*
     * scan the items until we find a match or exhaust our list
     *
     * Note: it's okay to use dlist_foreach here, even though we modify the
     * dlist within the loop, because we don't continue the loop afterwards.
     */
    dlist_foreach(iter, &cache->cc_lists)
    {
        cl = dlist_container(CatCList, cache_elem, iter.cur);
 
        if (cl->dead)
            continue;           /* ignore dead entries */
 
        if (cl->hash_value != lHashValue)
            continue;           /* quickly skip entry if wrong hash val */
 
        /*
         * see if the cached list matches our key.
         */
        if (cl->nkeys != nkeys)
            continue;
 
        if (!CatalogCacheCompareTuple(cache, nkeys, cl->keys, arguments))
            continue;
 
        /*
         * We found a matching list.  Move the list to the front of the
         * cache's list-of-lists, to speed subsequent searches.  (We do not
         * move the members to the fronts of their hashbucket lists, however,
         * since there's no point in that unless they are searched for
         * individually.)
         */
        dlist_move_head(&cache->cc_lists, &cl->cache_elem);
 
        /* Bump the list's refcount and return it */
        ResourceOwnerEnlargeCatCacheListRefs(CurrentResourceOwner);
        cl->refcount++;
        ResourceOwnerRememberCatCacheListRef(CurrentResourceOwner, cl);
 
        CACHE_elog(DEBUG2, "SearchCatCacheList(%s): found list",
                   cache->cc_relname);
 
#ifdef CATCACHE_STATS
        cache->cc_lhits++;
#endif
 
        return cl;
    }
 
    /*
     * List was not found in cache, so we have to build it by reading the
     * relation.  For each matching tuple found in the relation, use an
     * existing cache entry if possible, else build a new one.
     *
     * We have to bump the member refcounts temporarily to ensure they won't
     * get dropped from the cache while loading other members. We use a PG_TRY
     * block to ensure we can undo those refcounts if we get an error before
     * we finish constructing the CatCList.
     */
    ResourceOwnerEnlargeCatCacheListRefs(CurrentResourceOwner);
 
    ctlist = NIL;
 
    PG_TRY();
    {
        ScanKeyData cur_skey[CATCACHE_MAXKEYS];
        Relation    relation;
        SysScanDesc scandesc;
 
        /*
         * Ok, need to make a lookup in the relation, copy the scankey and
         * fill out any per-call fields.
         */
        memcpy(cur_skey, cache->cc_skey, sizeof(ScanKeyData) * cache->cc_nkeys);
        cur_skey[0].sk_argument = v1;
        cur_skey[1].sk_argument = v2;
        cur_skey[2].sk_argument = v3;
        cur_skey[3].sk_argument = v4;
 
        relation = table_open(cache->cc_reloid, AccessShareLock);
 
        scandesc = systable_beginscan(relation,
                                      cache->cc_indexoid,
                                      IndexScanOK(cache, cur_skey),
                                      NULL,
                                      nkeys,
                                      cur_skey);
 
        /* The list will be ordered iff we are doing an index scan */
        ordered = (scandesc->irel != NULL);
 
        while (HeapTupleIsValid(ntp = systable_getnext(scandesc)))
        {
            uint32      hashValue;
            Index       hashIndex;
            bool        found = false;
            dlist_head *bucket;
 
            /*
             * See if there's an entry for this tuple already.
             */
            ct = NULL;
            hashValue = CatalogCacheComputeTupleHashValue(cache, cache->cc_nkeys, ntp);
            hashIndex = HASH_INDEX(hashValue, cache->cc_nbuckets);
 
            bucket = &cache->cc_bucket[hashIndex];
            dlist_foreach(iter, bucket)
            {
                ct = dlist_container(CatCTup, cache_elem, iter.cur);
 
                if (ct->dead || ct->negative)
                    continue;   /* ignore dead and negative entries */
 
                if (ct->hash_value != hashValue)
                    continue;   /* quickly skip entry if wrong hash val */
 
                if (!ItemPointerEquals(&(ct->tuple.t_self), &(ntp->t_self)))
                    continue;   /* not same tuple */
 
                /*
                 * Found a match, but can't use it if it belongs to another
                 * list already
                 */
                if (ct->c_list)
                    continue;
 
                found = true;
                break;          /* A-OK */
            }
 
            if (!found)
            {
                /* We didn't find a usable entry, so make a new one */
                ct = CatalogCacheCreateEntry(cache, ntp, arguments,
                                             hashValue, hashIndex,
                                             false);
            }
 
            /* Careful here: add entry to ctlist, then bump its refcount */
            /* This way leaves state correct if lappend runs out of memory */
            ctlist = lappend(ctlist, ct);
            ct->refcount++;
        }
 
        systable_endscan(scandesc);
 
        table_close(relation, AccessShareLock);
 
        /* Now we can build the CatCList entry. */
        oldcxt = MemoryContextSwitchTo(CacheMemoryContext);
        nmembers = list_length(ctlist);
        cl = (CatCList *)
            palloc(offsetof(CatCList, members) + nmembers * sizeof(CatCTup *));
 
        /* Extract key values */
        CatCacheCopyKeys(cache->cc_tupdesc, nkeys, cache->cc_keyno,
                         arguments, cl->keys);
        MemoryContextSwitchTo(oldcxt);
 
        /*
         * We are now past the last thing that could trigger an elog before we
         * have finished building the CatCList and remembering it in the
         * resource owner.  So it's OK to fall out of the PG_TRY, and indeed
         * we'd better do so before we start marking the members as belonging
         * to the list.
         */
    }
    PG_CATCH();
    {
        foreach(ctlist_item, ctlist)
        {
            ct = (CatCTup *) lfirst(ctlist_item);
            Assert(ct->c_list == NULL);
            Assert(ct->refcount > 0);
            ct->refcount--;
            if (
#ifndef CATCACHE_FORCE_RELEASE
                ct->dead &&
#endif
                ct->refcount == 0 &&
                (ct->c_list == NULL || ct->c_list->refcount == 0))
                CatCacheRemoveCTup(cache, ct);
        }
 
        PG_RE_THROW();
    }
    PG_END_TRY();
 
    cl->cl_magic = CL_MAGIC;
    cl->my_cache = cache;
    cl->refcount = 0;           /* for the moment */
    cl->dead = false;
    cl->ordered = ordered;
    cl->nkeys = nkeys;
    cl->hash_value = lHashValue;
    cl->n_members = nmembers;
 
    i = 0;
    foreach(ctlist_item, ctlist)
    {
        cl->members[i++] = ct = (CatCTup *) lfirst(ctlist_item);
        Assert(ct->c_list == NULL);
        ct->c_list = cl;
        /* release the temporary refcount on the member */
        Assert(ct->refcount > 0);
        ct->refcount--;
        /* mark list dead if any members already dead */
        if (ct->dead)
            cl->dead = true;
    }
    Assert(i == nmembers);
 
    dlist_push_head(&cache->cc_lists, &cl->cache_elem);
 
    /* Finally, bump the list's refcount and return it */
    cl->refcount++;
    ResourceOwnerRememberCatCacheListRef(CurrentResourceOwner, cl);
 
    CACHE_elog(DEBUG2, "SearchCatCacheList(%s): made list of %d members",
               cache->cc_relname, nmembers);
 
    return cl;
}

References AccessShareLock, Assert(), catctup::c_list, catclist::cache_elem, CACHE_elog, CacheMemoryContext, CatalogCacheCompareTuple(), CatalogCacheComputeHashValue(), CatalogCacheComputeTupleHashValue(), CatalogCacheCreateEntry(), CatalogCacheInitializeCache(), CATCACHE_MAXKEYS, CatCacheCopyKeys(), CatCacheRemoveCTup(), catcache::cc_bucket, catcache::cc_indexoid, catcache::cc_keyno, catcache::cc_lists, catcache::cc_nbuckets, catcache::cc_nkeys, catcache::cc_relname, catcache::cc_reloid, catcache::cc_skey, catcache::cc_tupdesc, catclist::cl_magic, CL_MAGIC, dlist_iter::cur, CurrentResourceOwner, catctup::dead, catclist::dead, DEBUG2, dlist_container, dlist_foreach, dlist_move_head(), dlist_push_head(), HASH_INDEX, catctup::hash_value, catclist::hash_value, HeapTupleIsValid, i, IndexScanOK(), SysScanDescData::irel, ItemPointerEquals(), catclist::keys, lappend(), lfirst, list_length(), catclist::members, MemoryContextSwitchTo(), catclist::my_cache, catclist::n_members, catctup::negative, NIL, catclist::nkeys, catclist::ordered, palloc(), PG_CATCH, PG_END_TRY, PG_RE_THROW, PG_TRY, catctup::refcount, catclist::refcount, ResourceOwnerEnlargeCatCacheListRefs(), ResourceOwnerRememberCatCacheListRef(), ScanKeyData::sk_argument, systable_beginscan(), systable_endscan(), systable_getnext(), HeapTupleData::t_self, table_close(), table_open(), and catctup::tuple.

Referenced by SearchSysCacheList().

SearchCatCacheMiss()

static pg_noinline HeapTuple SearchCatCacheMiss ( CatCache *  cache, int  nkeys, uint32  hashValue, Index  hashIndex, Datum  v1, Datum  v2, Datum  v3, Datum  v4  )

static

Definition at line 1305 of file catcache.c.

{
    ScanKeyData cur_skey[CATCACHE_MAXKEYS];
    Relation    relation;
    SysScanDesc scandesc;
    HeapTuple   ntp;
    CatCTup    *ct;
    Datum       arguments[CATCACHE_MAXKEYS];
 
    /* Initialize local parameter array */
    arguments[0] = v1;
    arguments[1] = v2;
    arguments[2] = v3;
    arguments[3] = v4;
 
    /*
     * Ok, need to make a lookup in the relation, copy the scankey and fill
     * out any per-call fields.
     */
    memcpy(cur_skey, cache->cc_skey, sizeof(ScanKeyData) * nkeys);
    cur_skey[0].sk_argument = v1;
    cur_skey[1].sk_argument = v2;
    cur_skey[2].sk_argument = v3;
    cur_skey[3].sk_argument = v4;
 
    /*
     * Tuple was not found in cache, so we have to try to retrieve it directly
     * from the relation.  If found, we will add it to the cache; if not
     * found, we will add a negative cache entry instead.
     *
     * NOTE: it is possible for recursive cache lookups to occur while reading
     * the relation --- for example, due to shared-cache-inval messages being
     * processed during table_open().  This is OK.  It's even possible for one
     * of those lookups to find and enter the very same tuple we are trying to
     * fetch here.  If that happens, we will enter a second copy of the tuple
     * into the cache.  The first copy will never be referenced again, and
     * will eventually age out of the cache, so there's no functional problem.
     * This case is rare enough that it's not worth expending extra cycles to
     * detect.
     */
    relation = table_open(cache->cc_reloid, AccessShareLock);
 
    scandesc = systable_beginscan(relation,
                                  cache->cc_indexoid,
                                  IndexScanOK(cache, cur_skey),
                                  NULL,
                                  nkeys,
                                  cur_skey);
 
    ct = NULL;
 
    while (HeapTupleIsValid(ntp = systable_getnext(scandesc)))
    {
        ct = CatalogCacheCreateEntry(cache, ntp, arguments,
                                     hashValue, hashIndex,
                                     false);
        /* immediately set the refcount to 1 */
        ResourceOwnerEnlargeCatCacheRefs(CurrentResourceOwner);
        ct->refcount++;
        ResourceOwnerRememberCatCacheRef(CurrentResourceOwner, &ct->tuple);
        break;                  /* assume only one match */
    }
 
    systable_endscan(scandesc);
 
    table_close(relation, AccessShareLock);
 
    /*
     * If tuple was not found, we need to build a negative cache entry
     * containing a fake tuple.  The fake tuple has the correct key columns,
     * but nulls everywhere else.
     *
     * In bootstrap mode, we don't build negative entries, because the cache
     * invalidation mechanism isn't alive and can't clear them if the tuple
     * gets created later.  (Bootstrap doesn't do UPDATEs, so it doesn't need
     * cache inval for that.)
     */
    if (ct == NULL)
    {
        if (IsBootstrapProcessingMode())
            return NULL;
 
        ct = CatalogCacheCreateEntry(cache, NULL, arguments,
                                     hashValue, hashIndex,
                                     true);
 
        CACHE_elog(DEBUG2, "SearchCatCache(%s): Contains %d/%d tuples",
                   cache->cc_relname, cache->cc_ntup, CacheHdr->ch_ntup);
        CACHE_elog(DEBUG2, "SearchCatCache(%s): put neg entry in bucket %d",
                   cache->cc_relname, hashIndex);
 
        /*
         * We are not returning the negative entry to the caller, so leave its
         * refcount zero.
         */
 
        return NULL;
    }
 
    CACHE_elog(DEBUG2, "SearchCatCache(%s): Contains %d/%d tuples",
               cache->cc_relname, cache->cc_ntup, CacheHdr->ch_ntup);
    CACHE_elog(DEBUG2, "SearchCatCache(%s): put in bucket %d",
               cache->cc_relname, hashIndex);
 
#ifdef CATCACHE_STATS
    cache->cc_newloads++;
#endif
 
    return &ct->tuple;
}

References AccessShareLock, CACHE_elog, CacheHdr, CatalogCacheCreateEntry(), CATCACHE_MAXKEYS, catcache::cc_indexoid, catcache::cc_ntup, catcache::cc_relname, catcache::cc_reloid, catcache::cc_skey, catcacheheader::ch_ntup, CurrentResourceOwner, DEBUG2, HeapTupleIsValid, IndexScanOK(), IsBootstrapProcessingMode, catctup::refcount, ResourceOwnerEnlargeCatCacheRefs(), ResourceOwnerRememberCatCacheRef(), ScanKeyData::sk_argument, systable_beginscan(), systable_endscan(), systable_getnext(), table_close(), table_open(), and catctup::tuple.

Referenced by SearchCatCacheInternal().

texteqfast()

static bool texteqfast ( Datum  a, Datum  b  )

static

Definition at line 171 of file catcache.c.

{
    /*
     * The use of DEFAULT_COLLATION_OID is fairly arbitrary here.  We just
     * want to take the fast "deterministic" path in texteq().
     */
    return DatumGetBool(DirectFunctionCall2Coll(texteq, DEFAULT_COLLATION_OID, a, b));
}

References a, b, DatumGetBool(), DirectFunctionCall2Coll(), and texteq().

Referenced by GetCCHashEqFuncs().

texthashfast()

static uint32 texthashfast ( Datum  datum )

static

Definition at line 181 of file catcache.c.

{
    /* analogously here as in texteqfast() */
    return DatumGetInt32(DirectFunctionCall1Coll(hashtext, DEFAULT_COLLATION_OID, datum));
}

References DatumGetInt32(), DirectFunctionCall1Coll(), and hashtext().

Referenced by GetCCHashEqFuncs().

Variable Documentation

CacheHdr

CatCacheHeader* CacheHdr = NULL

static

Definition at line 64 of file catcache.c.

Referenced by CatalogCacheCreateEntry(), CatalogCacheFlushCatalog(), CatCacheRemoveCTup(), InitCatCache(), PrepareToInvalidateCacheTuple(), ResetCatalogCaches(), and SearchCatCacheMiss().