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spock_repset.c
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spock_repset.c
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/*-------------------------------------------------------------------------
*
* spock_repset.c
* spock replication set manipulation functions
*
* Copyright (c) 2022-2024, pgEdge, Inc.
* Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, The Regents of the University of California
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "funcapi.h"
#include "miscadmin.h"
#include "access/genam.h"
#include "access/hash.h"
#include "access/heapam.h"
#include "access/htup_details.h"
#include "access/sysattr.h"
#include "access/xact.h"
#include "catalog/dependency.h"
#include "catalog/indexing.h"
#include "catalog/namespace.h"
#include "catalog/objectaddress.h"
#include "catalog/pg_type.h"
#include "executor/spi.h"
#include "nodes/makefuncs.h"
#include "replication/reorderbuffer.h"
#include "utils/array.h"
#include "utils/builtins.h"
#include "utils/catcache.h"
#include "utils/fmgroids.h"
#include "utils/inval.h"
#include "utils/lsyscache.h"
#include "utils/rel.h"
#include "spock_dependency.h"
#include "spock_node.h"
#include "spock_queue.h"
#include "spock_repset.h"
#include "spock.h"
#define CATALOG_REPSET "replication_set"
#define CATALOG_REPSET_SEQ "replication_set_seq"
#define CATALOG_REPSET_TABLE "replication_set_table"
#define CATALOG_REPSET_RELATION "replication_set_relation"
typedef struct RepSetTuple
{
Oid id;
Oid nodeid;
NameData name;
bool replicate_insert;
bool replicate_update;
bool replicate_delete;
bool replicate_truncate;
} RepSetTuple;
#define Natts_repset 7
#define Anum_repset_id 1
#define Anum_repset_nodeid 2
#define Anum_repset_name 3
#define Anum_repset_replicate_insert 4
#define Anum_repset_replicate_update 5
#define Anum_repset_replicate_delete 6
#define Anum_repset_replicate_truncate 7
typedef struct RepSetSeqTuple
{
Oid id;
Oid seqoid;
} RepSetSeqTuple;
#define Natts_repset_seq 2
#define Anum_repset_seq_setid 1
#define Anum_repset_seq_seqoid 2
typedef struct RepSetTableTuple
{
Oid setid;
Oid reloid;
#if 0 /* Only for info here. */
text att_list[1];
text row_filter;
#endif
} RepSetTableTuple;
#define Natts_repset_table 4
#define Anum_repset_table_setid 1
#define Anum_repset_table_reloid 2
#define Anum_repset_table_att_list 3
#define Anum_repset_table_row_filter 4
#define REPSETTABLEHASH_INITIAL_SIZE 128
static HTAB *RepSetTableHash = NULL;
/*
* Read the replication set.
*/
SpockRepSet *
get_replication_set(Oid setid)
{
SpockRepSet *repset;
RangeVar *rv;
Relation rel;
SysScanDesc scan;
HeapTuple tuple;
ScanKeyData key[1];
Assert(IsTransactionState());
rv = makeRangeVar(EXTENSION_NAME, CATALOG_REPSET, -1);
rel = table_openrv(rv, RowExclusiveLock);
/* Search for repset record. */
ScanKeyInit(&key[0],
Anum_repset_id,
BTEqualStrategyNumber, F_OIDEQ,
ObjectIdGetDatum(setid));
scan = systable_beginscan(rel, 0, true, NULL, 1, key);
tuple = systable_getnext(scan);
if (!HeapTupleIsValid(tuple))
elog(ERROR, "replication set %u not found", setid);
repset = replication_set_from_tuple(tuple);
systable_endscan(scan);
table_close(rel, RowExclusiveLock);
return repset;
}
/*
* Find replication set by name
*/
SpockRepSet *
get_replication_set_by_name(Oid nodeid, const char *setname, bool missing_ok)
{
SpockRepSet *repset;
RangeVar *rv;
Relation rel;
SysScanDesc scan;
HeapTuple tuple;
ScanKeyData key[2];
Assert(IsTransactionState());
rv = makeRangeVar(EXTENSION_NAME, CATALOG_REPSET, -1);
rel = table_openrv(rv, RowExclusiveLock);
/* Search for repset record. */
ScanKeyInit(&key[0],
Anum_repset_nodeid,
BTEqualStrategyNumber, F_OIDEQ,
ObjectIdGetDatum(nodeid));
ScanKeyInit(&key[1],
Anum_repset_name,
BTEqualStrategyNumber, F_NAMEEQ,
CStringGetDatum(setname));
scan = systable_beginscan(rel, 0, true, NULL, 2, key);
tuple = systable_getnext(scan);
if (!HeapTupleIsValid(tuple))
{
if (missing_ok)
{
systable_endscan(scan);
table_close(rel, RowExclusiveLock);
return NULL;
}
elog(ERROR, "replication set %s not found", setname);
}
repset = replication_set_from_tuple(tuple);
systable_endscan(scan);
table_close(rel, RowExclusiveLock);
return repset;
}
static void
repset_relcache_invalidate_callback(Datum arg, Oid reloid)
{
SpockTableRepInfo *entry;
/* Just to be sure. */
if (RepSetTableHash == NULL)
return;
if (reloid == InvalidOid)
{
HASH_SEQ_STATUS status;
hash_seq_init(&status, RepSetTableHash);
while ((entry = hash_seq_search(&status)) != NULL)
{
entry->isvalid = false;
if (entry->att_list)
pfree(entry->att_list);
entry->att_list = NULL;
if (list_length(entry->row_filter))
list_free_deep(entry->row_filter);
entry->row_filter = NIL;
}
}
else if ((entry = hash_search(RepSetTableHash, &reloid,
HASH_FIND, NULL)) != NULL)
{
entry->isvalid = false;
if (entry->att_list)
pfree(entry->att_list);
entry->att_list = NULL;
if (list_length(entry->row_filter))
list_free_deep(entry->row_filter);
entry->row_filter = NIL;
}
}
static void
repset_relcache_init(void)
{
HASHCTL ctl;
int hashflags;
/* Make sure we've initialized CacheMemoryContext. */
if (CacheMemoryContext == NULL)
CreateCacheMemoryContext();
/* Initialize the hash table. */
MemSet(&ctl, 0, sizeof(ctl));
ctl.keysize = sizeof(Oid);
ctl.entrysize = sizeof(SpockTableRepInfo);
ctl.hcxt = CacheMemoryContext;
hashflags = HASH_ELEM | HASH_CONTEXT;
#if PG_VERSION_NUM < 90500
/*
* Handle the old hash API in PostgreSQL 9.4.
*
* See postgres commit:
*
* 4a14f13a0ab Improve hash_create's API for selecting simple-binary-key hash functions.
*/
ctl.hash = oid_hash;
hashflags |= HASH_FUNCTION;
#else
hashflags |= HASH_BLOBS;
#endif
RepSetTableHash = hash_create("spock repset table cache",
REPSETTABLEHASH_INITIAL_SIZE, &ctl,
hashflags);
/*
* Watch for invalidation events fired when the relcache changes.
*
* Note that no invalidations are fired when the replication sets are
* created, destroyed, modified, or change membership since there's no
* syscache management for user catalogs. We do our own invalidations for
* those separately.
*/
CacheRegisterRelcacheCallback(repset_relcache_invalidate_callback,
(Datum) 0);
}
List *
get_node_replication_sets(Oid nodeid)
{
RangeVar *rv;
Relation rel;
SysScanDesc scan;
HeapTuple tuple;
ScanKeyData key[1];
List *replication_sets = NIL;
Assert(IsTransactionState());
rv = makeRangeVar(EXTENSION_NAME, CATALOG_REPSET, -1);
rel = table_openrv(rv, RowExclusiveLock);
ScanKeyInit(&key[0],
Anum_repset_nodeid,
BTEqualStrategyNumber, F_OIDEQ,
ObjectIdGetDatum(nodeid));
scan = systable_beginscan(rel, 0, true, NULL, 1, key);
while (HeapTupleIsValid(tuple = systable_getnext(scan)))
{
RepSetTuple *t = (RepSetTuple *) GETSTRUCT(tuple);
SpockRepSet *repset = get_replication_set(t->id);
replication_sets = lappend(replication_sets, repset);
}
systable_endscan(scan);
table_close(rel, RowExclusiveLock);
return replication_sets;
}
List *
get_replication_sets(Oid nodeid, List *replication_set_names, bool missing_ok)
{
RangeVar *rv;
Relation rel;
ListCell *lc;
ScanKeyData key[2];
List *replication_sets = NIL;
Assert(IsTransactionState());
rv = makeRangeVar(EXTENSION_NAME, CATALOG_REPSET, -1);
rel = table_openrv(rv, RowExclusiveLock);
/* Setup common part of key. */
ScanKeyInit(&key[0],
Anum_repset_nodeid,
BTEqualStrategyNumber, F_OIDEQ,
ObjectIdGetDatum(nodeid));
foreach(lc, replication_set_names)
{
char *setname = lfirst(lc);
SysScanDesc scan;
HeapTuple tuple;
/* Search for repset record. */
ScanKeyInit(&key[1],
Anum_repset_name,
BTEqualStrategyNumber, F_NAMEEQ,
CStringGetDatum(setname));
/* TODO: use index. */
scan = systable_beginscan(rel, 0, true, NULL, 2, key);
tuple = systable_getnext(scan);
if (!HeapTupleIsValid(tuple))
{
if (missing_ok)
{
systable_endscan(scan);
continue;
}
else
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("replication set %s not found", setname)));
}
replication_sets = lappend(replication_sets,
replication_set_from_tuple(tuple));
systable_endscan(scan);
}
table_close(rel, RowExclusiveLock);
return replication_sets;
}
SpockTableRepInfo *
get_table_replication_info(Oid nodeid, Relation table,
List *subs_replication_sets)
{
SpockTableRepInfo *entry;
bool found;
RangeVar *rv;
Oid reloid = RelationGetRelid(table);
Oid repset_reloid;
Relation repset_rel;
ScanKeyData key[1];
SysScanDesc scan;
HeapTuple tuple;
TupleDesc table_desc,
repset_rel_desc;
if (RepSetTableHash == NULL)
repset_relcache_init();
/*
* HASH_ENTER returns the existing entry if present or creates a new one.
*
* It might seem that it's weird to use just reloid here for the cache key
* when we are searching for nodeid + relation. But this function is only
* used by the output plugin which means the nodeid is always the same as
* only one node is connected to current process.
*/
entry = hash_search(RepSetTableHash, (void *) &reloid,
HASH_ENTER, &found);
if (found && entry->isvalid)
return entry;
/* Fill the entry */
entry->reloid = reloid;
entry->replicate_insert = false;
entry->replicate_update = false;
entry->replicate_delete = false;
entry->replicate_truncate = false;
entry->att_list = NULL;
entry->row_filter = NIL;
/*
* Check for match between table's replication sets and the subscription
* list of replication sets that was given as parameter.
*
* Note that tables can have no replication sets. This will be commonly
* true for example for internal tables which are created during table
* rewrites, so if we'll want to support replicating those, we'll have
* to have special handling for them.
*/
rv = makeRangeVar(EXTENSION_NAME, CATALOG_REPSET_TABLE, -1);
repset_reloid = RangeVarGetRelid(rv, RowExclusiveLock, true);
/* Backwards compat with 1.1/1.2 where the relation name was different. */
if (!OidIsValid(repset_reloid))
{
rv = makeRangeVar(EXTENSION_NAME, CATALOG_REPSET_RELATION, -1);
repset_reloid = RangeVarGetRelid(rv, RowExclusiveLock, true);
if (!OidIsValid(repset_reloid))
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_TABLE),
errmsg("relation \"%s.%s\" does not exist",
rv->schemaname, rv->relname)));
}
repset_rel = table_open(repset_reloid, NoLock);
repset_rel_desc = RelationGetDescr(repset_rel);
table_desc = RelationGetDescr(table);
ScanKeyInit(&key[0],
Anum_repset_table_reloid,
BTEqualStrategyNumber, F_OIDEQ,
ObjectIdGetDatum(reloid));
/* TODO: use index */
scan = systable_beginscan(repset_rel, 0, true, NULL, 1, key);
while (HeapTupleIsValid(tuple = systable_getnext(scan)))
{
RepSetTableTuple *t = (RepSetTableTuple *) GETSTRUCT(tuple);
ListCell *lc;
foreach (lc, subs_replication_sets)
{
SpockRepSet *repset = lfirst(lc);
bool isnull;
Datum d;
if (t->setid == repset->id)
{
/* Update the action filter. */
if (repset->replicate_insert)
entry->replicate_insert = true;
if (repset->replicate_update)
entry->replicate_update = true;
if (repset->replicate_delete)
entry->replicate_delete = true;
if (repset->replicate_truncate)
entry->replicate_truncate = true;
/* Update replicated column map. */
d = heap_getattr(tuple, Anum_repset_table_att_list,
repset_rel_desc, &isnull);
if (!isnull)
{
Datum *elems;
int nelems, i;
deconstruct_array(DatumGetArrayTypePCopy(d),
TEXTOID, -1, false, 'i',
&elems, NULL, &nelems);
for (i = 0; i < nelems; i++)
{
const char *attname = TextDatumGetCString(elems[i]);
int attnum = get_att_num_by_name(table_desc,
attname);
MemoryContext olctx = MemoryContextSwitchTo(CacheMemoryContext);
entry->att_list = bms_add_member(entry->att_list,
attnum - FirstLowInvalidHeapAttributeNumber);
MemoryContextSwitchTo(olctx);
}
}
/* Add row filter if any. */
d = heap_getattr(tuple, Anum_repset_table_row_filter,
repset_rel_desc, &isnull);
if (!isnull)
{
MemoryContext olctx = MemoryContextSwitchTo(CacheMemoryContext);
Node *row_filter = stringToNode(TextDatumGetCString(d));
entry->row_filter = lappend(entry->row_filter, row_filter);
MemoryContextSwitchTo(olctx);
}
}
}
}
systable_endscan(scan);
table_close(repset_rel, RowExclusiveLock);
entry->isvalid = true;
return entry;
}
RepSetTableTuple*
get_table_replication_row(Oid repsetid, Oid reloid,
List **att_list, Node **row_filter)
{
Oid repset_reloid;
Oid repset_indoid;
Relation repset_rel;
ScanKeyData key[2];
SysScanDesc scan;
HeapTuple tuple;
TupleDesc repset_rel_desc;
RepSetTableTuple *reptuple = NULL;
repset_reloid = get_replication_set_table_rel_oid();
repset_rel = table_open(repset_reloid, RowExclusiveLock);
repset_rel_desc = RelationGetDescr(repset_rel);
repset_indoid = RelationGetPrimaryKeyIndex(repset_rel);
ScanKeyInit(&key[0],
Anum_repset_table_setid,
BTEqualStrategyNumber, F_OIDEQ,
ObjectIdGetDatum(repsetid));
ScanKeyInit(&key[1],
Anum_repset_table_reloid,
BTEqualStrategyNumber, F_OIDEQ,
ObjectIdGetDatum(reloid));
scan = systable_beginscan(repset_rel, repset_indoid, true, NULL, 2, key);
tuple = systable_getnext(scan);
if (HeapTupleIsValid(tuple))
{
bool isnull;
Datum d;
reptuple = (RepSetTableTuple *) GETSTRUCT(tuple);
/* Update replicated column map. */
if (att_list != NULL)
{
d = heap_getattr(tuple, Anum_repset_table_att_list,
repset_rel_desc, &isnull);
if (!isnull)
*att_list = textarray_to_list(DatumGetArrayTypePCopy(d));
}
if (row_filter != NULL)
{
/* Add row filter if any. */
d = heap_getattr(tuple, Anum_repset_table_row_filter,
repset_rel_desc, &isnull);
if (!isnull)
{
MemoryContext olctx = MemoryContextSwitchTo(CacheMemoryContext);
*row_filter = stringToNode(TextDatumGetCString(d));
MemoryContextSwitchTo(olctx);
}
}
}
systable_endscan(scan);
table_close(repset_rel, RowExclusiveLock);
return reptuple;
}
List *
get_table_replication_sets(Oid nodeid, Oid reloid)
{
RangeVar *rv;
Oid relid;
Relation rel;
ScanKeyData key[1];
SysScanDesc scan;
HeapTuple tuple;
List *replication_sets = NIL;
Assert(IsTransactionState());
rv = makeRangeVar(EXTENSION_NAME, CATALOG_REPSET_TABLE, -1);
relid = RangeVarGetRelid(rv, RowExclusiveLock, true);
/* Backwards compat with 1.1/1.2 where the relation name was different. */
if (!OidIsValid(relid))
{
rv = makeRangeVar(EXTENSION_NAME, CATALOG_REPSET_RELATION, -1);
relid = RangeVarGetRelid(rv, RowExclusiveLock, true);
if (!OidIsValid(relid))
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_TABLE),
errmsg("relation \"%s.%s\" does not exist",
rv->schemaname, rv->relname)));
}
rel = table_open(relid, NoLock);
ScanKeyInit(&key[0],
Anum_repset_table_reloid,
BTEqualStrategyNumber, F_OIDEQ,
ObjectIdGetDatum(reloid));
/* TODO: use index */
scan = systable_beginscan(rel, 0, true, NULL, 1, key);
while (HeapTupleIsValid(tuple = systable_getnext(scan)))
{
RepSetSeqTuple *t = (RepSetSeqTuple *) GETSTRUCT(tuple);
SpockRepSet *repset = get_replication_set(t->id);
if (repset->nodeid != nodeid)
continue;
replication_sets = lappend(replication_sets, repset);
}
systable_endscan(scan);
table_close(rel, RowExclusiveLock);
return replication_sets;
}
static bool
sequence_has_replication_sets(Oid nodeid, Oid seqoid)
{
RangeVar *rv;
Relation rel;
ScanKeyData key[1];
SysScanDesc scan;
HeapTuple tuple;
bool res = false;
Assert(IsTransactionState());
rv = makeRangeVar(EXTENSION_NAME, CATALOG_REPSET_SEQ, -1);
rel = table_openrv(rv, RowExclusiveLock);
ScanKeyInit(&key[0],
Anum_repset_seq_seqoid,
BTEqualStrategyNumber, F_OIDEQ,
ObjectIdGetDatum(seqoid));
/* TODO: use index */
scan = systable_beginscan(rel, 0, true, NULL, 1, key);
if (HeapTupleIsValid(tuple = systable_getnext(scan)))
res = true;
systable_endscan(scan);
table_close(rel, RowExclusiveLock);
return res;
}
List *
get_seq_replication_sets(Oid nodeid, Oid seqoid)
{
RangeVar *rv;
Relation rel;
ScanKeyData key[1];
SysScanDesc scan;
HeapTuple tuple;
List *replication_sets = NIL;
Assert(IsTransactionState());
rv = makeRangeVar(EXTENSION_NAME, CATALOG_REPSET_SEQ, -1);
rel = table_openrv(rv, RowExclusiveLock);
ScanKeyInit(&key[0],
Anum_repset_table_reloid,
BTEqualStrategyNumber, F_OIDEQ,
ObjectIdGetDatum(seqoid));
/* TODO: use index */
scan = systable_beginscan(rel, 0, true, NULL, 1, key);
while (HeapTupleIsValid(tuple = systable_getnext(scan)))
{
RepSetSeqTuple *t = (RepSetSeqTuple *) GETSTRUCT(tuple);
SpockRepSet *repset = get_replication_set(t->id);
if (repset->nodeid != nodeid)
continue;
replication_sets = lappend(replication_sets, repset);
}
systable_endscan(scan);
table_close(rel, RowExclusiveLock);
return replication_sets;
}
/*
* Add new tuple to the replication_sets catalog.
*/
void
create_replication_set(SpockRepSet *repset)
{
RangeVar *rv;
Relation rel;
TupleDesc tupDesc;
HeapTuple tup;
Datum values[Natts_repset];
bool nulls[Natts_repset];
NameData repset_name;
if (strlen(repset->name) == 0)
ereport(ERROR,
(errcode(ERRCODE_INVALID_NAME),
errmsg("replication set name cannot be empty")));
if (get_replication_set_by_name(repset->nodeid, repset->name, true) != NULL)
elog(ERROR, "replication set %s already exists", repset->name);
/*
* Generate new id unless one was already specified.
*/
if (repset->id == InvalidOid)
{
uint32 hashinput[2];
hashinput[0] = repset->nodeid;
hashinput[1] = DatumGetUInt32(hash_any((const unsigned char *) repset->name,
strlen(repset->name)));
repset->id = DatumGetUInt32(hash_any((const unsigned char *) hashinput,
(int) sizeof(hashinput)));
}
rv = makeRangeVar(EXTENSION_NAME, CATALOG_REPSET, -1);
rel = table_openrv(rv, RowExclusiveLock);
tupDesc = RelationGetDescr(rel);
/* Form a tuple. */
memset(nulls, false, sizeof(nulls));
values[Anum_repset_id - 1] = ObjectIdGetDatum(repset->id);
values[Anum_repset_nodeid - 1] = ObjectIdGetDatum(repset->nodeid);
namestrcpy(&repset_name, repset->name);
values[Anum_repset_name - 1] = NameGetDatum(&repset_name);
values[Anum_repset_replicate_insert - 1] =
BoolGetDatum(repset->replicate_insert);
values[Anum_repset_replicate_update - 1] =
BoolGetDatum(repset->replicate_update);
values[Anum_repset_replicate_delete - 1] =
BoolGetDatum(repset->replicate_delete);
values[Anum_repset_replicate_truncate - 1] =
BoolGetDatum(repset->replicate_truncate);
tup = heap_form_tuple(tupDesc, values, nulls);
/* Insert the tuple to the catalog. */
CatalogTupleInsert(rel, tup);
/* Cleanup. */
heap_freetuple(tup);
table_close(rel, RowExclusiveLock);
CommandCounterIncrement();
}
/*
* Alter the existing replication set.
*/
void
alter_replication_set(SpockRepSet *repset)
{
RangeVar *rv;
SysScanDesc scan;
ScanKeyData key[1];
Relation rel;
TupleDesc tupDesc;
HeapTuple oldtup,
newtup;
Datum values[Natts_repset];
bool nulls[Natts_repset];
bool replaces[Natts_repset];
rv = makeRangeVar(EXTENSION_NAME, CATALOG_REPSET, -1);
rel = table_openrv(rv, RowExclusiveLock);
tupDesc = RelationGetDescr(rel);
/* Search for repset record. */
ScanKeyInit(&key[0],
Anum_repset_id,
BTEqualStrategyNumber, F_OIDEQ,
ObjectIdGetDatum(repset->id));
scan = systable_beginscan(rel, 0, true, NULL, 1, key);
oldtup = systable_getnext(scan);
if (!HeapTupleIsValid(oldtup))
elog(ERROR, "replication set %u not found", repset->id);
/*
* Validate that replication is not being changed to replicate UPDATEs
* and DELETEs if it contains any tables without replication identity.
*/
if (repset->replicate_update || repset->replicate_delete)
{
RangeVar *tablesrv;
Relation tablesrel;
SysScanDesc tablesscan;
HeapTuple tablestup;
ScanKeyData tableskey[1];
tablesrv = makeRangeVar(EXTENSION_NAME, CATALOG_REPSET_TABLE, -1);
tablesrel = table_openrv(tablesrv, RowExclusiveLock);
/* Search for the record. */
ScanKeyInit(&tableskey[0],
Anum_repset_table_setid,
BTEqualStrategyNumber, F_OIDEQ,
ObjectIdGetDatum(repset->id));
tablesscan = systable_beginscan(tablesrel, 0, true, NULL, 1, tableskey);
/* Process every individual table in the set. */
while (HeapTupleIsValid(tablestup = systable_getnext(tablesscan)))
{
RepSetTableTuple *t = (RepSetTableTuple *) GETSTRUCT(tablestup);
Relation targetrel;
targetrel = table_open(t->reloid, AccessShareLock);
/* Check of relation has replication index. */
if (RelationGetForm(targetrel)->relkind == RELKIND_RELATION)
{
if (targetrel->rd_indexvalid == 0)
RelationGetIndexList(targetrel);
if (!OidIsValid(targetrel->rd_replidindex) &&
(repset->replicate_update || repset->replicate_delete))
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("replication set %s cannot be altered to "
"replicate UPDATEs or DELETEs because it "
"contains tables without PRIMARY KEY",
repset->name)));
}
table_close(targetrel, NoLock);
}
systable_endscan(tablesscan);
table_close(tablesrel, RowExclusiveLock);
}
/* Everything ok, form a new tuple. */
memset(nulls, false, sizeof(nulls));
memset(replaces, true, sizeof(replaces));
replaces[Anum_repset_id - 1] = false;
replaces[Anum_repset_name - 1] = false;
replaces[Anum_repset_nodeid - 1] = false;
values[Anum_repset_replicate_insert - 1] =
BoolGetDatum(repset->replicate_insert);
values[Anum_repset_replicate_update - 1] =
BoolGetDatum(repset->replicate_update);
values[Anum_repset_replicate_delete - 1] =
BoolGetDatum(repset->replicate_delete);
values[Anum_repset_replicate_truncate - 1] =
BoolGetDatum(repset->replicate_truncate);
newtup = heap_modify_tuple(oldtup, tupDesc, values, nulls, replaces);
/* Update the tuple in catalog. */
CatalogTupleUpdate(rel, &oldtup->t_self, newtup);
/* Cleanup. */
heap_freetuple(newtup);
systable_endscan(scan);
table_close(rel, RowExclusiveLock);
}
/*
* Remove all tables from replication set.
*/
static void
replication_set_remove_tables(Oid setid, Oid nodeid)
{
RangeVar *rv;
Relation rel;
SysScanDesc scan;
HeapTuple tuple;
ScanKeyData key[1];
ObjectAddress myself;
rv = makeRangeVar(EXTENSION_NAME, CATALOG_REPSET_TABLE, -1);
rel = table_openrv(rv, RowExclusiveLock);
myself.classId = get_replication_set_table_rel_oid();
myself.objectId = setid;
/* Search for the record. */
ScanKeyInit(&key[0],
Anum_repset_table_setid,
BTEqualStrategyNumber, F_OIDEQ,
ObjectIdGetDatum(setid));
scan = systable_beginscan(rel, 0, true, NULL, 1, key);
while (HeapTupleIsValid(tuple = systable_getnext(scan)))
{
RepSetTableTuple *t = (RepSetTableTuple *) GETSTRUCT(tuple);
Oid reloid = t->reloid;
/* Remove the tuple. */
simple_heap_delete(rel, &tuple->t_self);
CacheInvalidateRelcacheByRelid(reloid);
/* Dependency cleanup. */
myself.objectSubId = reloid;
spock_tryDropDependencies(&myself, DROP_CASCADE);
}
/* Cleanup. */
systable_endscan(scan);
table_close(rel, RowExclusiveLock);
}
/*
* Remove all sequences from replication set.
*/
static void
replication_set_remove_seqs(Oid setid, Oid nodeid)
{
RangeVar *rv;
Relation rel;
SysScanDesc scan;
HeapTuple tuple;
ScanKeyData key[1];
ObjectAddress myself;
rv = makeRangeVar(EXTENSION_NAME, CATALOG_REPSET_SEQ, -1);
rel = table_openrv(rv, RowExclusiveLock);
/* Search for the record. */
ScanKeyInit(&key[0],
Anum_repset_table_setid,
BTEqualStrategyNumber, F_OIDEQ,
ObjectIdGetDatum(setid));
scan = systable_beginscan(rel, 0, true, NULL, 1, key);
myself.classId = get_replication_set_seq_rel_oid();
myself.objectId = setid;
while (HeapTupleIsValid(tuple = systable_getnext(scan)))
{
RepSetSeqTuple *t = (RepSetSeqTuple *) GETSTRUCT(tuple);
Oid seqoid = t->seqoid;
/* Remove the tuple. */
simple_heap_delete(rel, &tuple->t_self);
/* Make sure the sequence_has_replication_sets sees the changes. */
CommandCounterIncrement();
if (!sequence_has_replication_sets(nodeid, seqoid))
spock_drop_sequence_state_record(seqoid);
CacheInvalidateRelcacheByRelid(seqoid);
/* Dependency cleanup. */
myself.objectSubId = seqoid;
spock_tryDropDependencies(&myself, DROP_CASCADE);
}
/* Cleanup. */
systable_endscan(scan);
table_close(rel, RowExclusiveLock);
}
/*
* Delete the tuple from replication sets catalog.
*/
void
drop_replication_set(Oid setid)
{
RangeVar *rv;
Relation rel;
SysScanDesc scan;
HeapTuple tuple;