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spock_apply_heap.c
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/*-------------------------------------------------------------------------
*
* spock_apply_heap.c
* spock apply functions using heap api
*
* Copyright (c) 2015, PostgreSQL Global Development Group
*
* IDENTIFICATION
* spock_apply_heap.c
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "miscadmin.h"
#include "libpq-fe.h"
#include "pgstat.h"
#include "access/htup_details.h"
#include "access/xact.h"
#include "catalog/namespace.h"
#include "commands/dbcommands.h"
#include "commands/sequence.h"
#include "commands/tablecmds.h"
#include "commands/trigger.h"
#include "executor/executor.h"
#include "libpq/pqformat.h"
#include "mb/pg_wchar.h"
#include "nodes/makefuncs.h"
#include "nodes/parsenodes.h"
#include "optimizer/clauses.h"
#include "optimizer/optimizer.h"
#include "replication/origin.h"
#include "replication/reorderbuffer.h"
#include "rewrite/rewriteHandler.h"
#include "storage/ipc.h"
#include "storage/lmgr.h"
#include "storage/proc.h"
#include "tcop/pquery.h"
#include "tcop/utility.h"
#include "utils/attoptcache.h"
#include "utils/builtins.h"
#include "utils/jsonb.h"
#include "utils/lsyscache.h"
#include "utils/memutils.h"
#include "utils/snapmgr.h"
#include "spock_conflict.h"
#include "spock_executor.h"
#include "spock_node.h"
#include "spock_proto_native.h"
#include "spock_queue.h"
#include "spock_relcache.h"
#include "spock_repset.h"
#include "spock_rpc.h"
#include "spock_sync.h"
#include "spock_worker.h"
#include "spock_apply_heap.h"
typedef struct ApplyExecState {
EState *estate;
EPQState epqstate;
ResultRelInfo *resultRelInfo;
TupleTableSlot *slot;
} ApplyExecState;
/* State related to bulk insert */
typedef struct ApplyMIState
{
SpockRelation *rel;
ApplyExecState *aestate;
CommandId cid;
BulkInsertState bistate;
TupleTableSlot **buffered_tuples;
int maxbuffered_tuples;
int nbuffered_tuples;
} ApplyMIState;
#define TTS_TUP(slot) (((HeapTupleTableSlot *)slot)->tuple)
static ApplyMIState *spkmistate = NULL;
static bool relation_has_delta_columns(SpockRelation *rel);
static void build_delta_tuple(SpockRelation *rel, SpockTupleData *oldtup,
SpockTupleData *newtup, SpockTupleData *deltatup,
TupleTableSlot *localslot);
void
spock_apply_heap_begin(void)
{
spock_cth_prune(false);
}
void
spock_apply_heap_commit(void)
{
TimestampTz next_prune;
TimestampTz now;
int32 num_pruned;
/*
* For pruning of the Conflict Tracking Hash we remember our
* assigned origin and the last commit timestamp.
*/
LWLockAcquire(SpockCtx->lock, LW_EXCLUSIVE);
if (MySpockWorker->worker.apply.replorigin != replorigin_session_origin)
{
if (MySpockWorker->worker.apply.replorigin != InvalidRepOriginId)
/* This should never happen */
elog(LOG, "SPOCK: remote origin id changes from %d to %d",
MySpockWorker->worker.apply.replorigin,
replorigin_session_origin);
MySpockWorker->worker.apply.replorigin = replorigin_session_origin;
}
MySpockWorker->worker.apply.last_ts = replorigin_session_origin_timestamp;
LWLockRelease(SpockCtx->lock);
next_prune = TimestampTzPlusMilliseconds(SpockCtx->ctt_last_prune,
SpockCtx->ctt_prune_interval * 1000);
now = GetCurrentTimestamp();
if (next_prune <= now)
{
SpockCtx->ctt_last_prune = now;
PushActiveSnapshot(GetTransactionSnapshot());
num_pruned = spock_ctt_prune(false);
PopActiveSnapshot();
CommandCounterIncrement();
elog(DEBUG1, "SPOCK: %d entries pruned from CTT", num_pruned);
}
spock_ctt_close();
}
static List *
UserTableUpdateOpenIndexes(ResultRelInfo *relinfo, EState *estate, TupleTableSlot *slot, bool update)
{
List *recheckIndexes = NIL;
if (relinfo->ri_NumIndices > 0)
{
recheckIndexes = ExecInsertIndexTuples(
#if PG_VERSION_NUM >= 140000
relinfo,
#endif
slot,
estate
#if PG_VERSION_NUM >= 140000
, update
#endif
, false, NULL, NIL
);
/* FIXME: recheck the indexes */
if (recheckIndexes != NIL)
{
StringInfoData si;
ListCell *lc;
const char *idxname, *relname, *nspname;
Relation target_rel = relinfo->ri_RelationDesc;
relname = RelationGetRelationName(target_rel);
nspname = get_namespace_name(RelationGetNamespace(target_rel));
initStringInfo(&si);
foreach (lc, recheckIndexes)
{
Oid idxoid = lfirst_oid(lc);
idxname = get_rel_name(idxoid);
if (idxname == NULL)
elog(ERROR, "cache lookup failed for index oid %u", idxoid);
if (si.len > 0)
appendStringInfoString(&si, ", ");
appendStringInfoString(&si, quote_identifier(idxname));
}
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("spock doesn't support deferrable indexes"),
errdetail("relation %s.%s has deferrable indexes: %s",
quote_identifier(nspname),
quote_identifier(relname),
si.data)));
}
list_free(recheckIndexes);
}
return recheckIndexes;
}
static bool
physatt_in_attmap(SpockRelation *rel, int attid)
{
AttrNumber i;
for (i = 0; i < rel->natts; i++)
if (rel->attmap[i] == attid)
return true;
return false;
}
/*
* Executes default values for columns for which we didn't get any data.
*
* TODO: this needs caching, it's not exactly fast.
*/
static void
fill_missing_defaults(SpockRelation *rel, EState *estate,
SpockTupleData *tuple)
{
TupleDesc desc = RelationGetDescr(rel->rel);
AttrNumber num_phys_attrs = desc->natts;
int i;
AttrNumber attnum,
num_defaults = 0;
int *defmap;
ExprState **defexprs;
ExprContext *econtext;
econtext = GetPerTupleExprContext(estate);
/* We got all the data via replication, no need to evaluate anything. */
if (num_phys_attrs == rel->natts)
return;
defmap = (int *) palloc(num_phys_attrs * sizeof(int));
defexprs = (ExprState **) palloc(num_phys_attrs * sizeof(ExprState *));
for (attnum = 0; attnum < num_phys_attrs; attnum++)
{
Expr *defexpr;
if (TupleDescAttr(desc,attnum)->attisdropped)
continue;
if (physatt_in_attmap(rel, attnum))
continue;
defexpr = (Expr *) build_column_default(rel->rel, attnum + 1);
if (defexpr != NULL)
{
/* Run the expression through planner */
defexpr = expression_planner(defexpr);
/* Initialize executable expression in copycontext */
defexprs[num_defaults] = ExecInitExpr(defexpr, NULL);
defmap[num_defaults] = attnum;
num_defaults++;
}
}
for (i = 0; i < num_defaults; i++)
tuple->values[defmap[i]] = ExecEvalExpr(defexprs[i],
econtext,
&tuple->nulls[defmap[i]],
NULL);
}
static bool
relation_has_delta_columns(SpockRelation *rel)
{
TupleDesc tupdesc = RelationGetDescr(rel->rel);
AttributeOpts *aopt;
int attno;
for (attno = 1; attno <= tupdesc->natts; attno++)
{
/* check the attribute options */
aopt = get_attribute_options(rel->rel->rd_id, attno);
if (aopt != NULL && aopt->log_old_value)
return true;
}
return false;
}
static void
build_delta_tuple(SpockRelation *rel, SpockTupleData *oldtup,
SpockTupleData *newtup,
SpockTupleData *deltatup,
TupleTableSlot *localslot)
{
TupleDesc tupdesc = RelationGetDescr(rel->rel);
Form_pg_attribute att;
AttributeOpts *aopt;
int attidx;
Datum loc_value;
Datum delta;
bool loc_isnull;
PGFunction func_add;
PGFunction func_sub;
for (attidx = 0; attidx < tupdesc->natts; attidx++)
{
/* Get the attribute options */
aopt = get_attribute_options(rel->rel->rd_id, attidx + 1);
if (aopt == NULL || !aopt->log_old_value)
{
deltatup->values[attidx] = 0xdeadbeef;
deltatup->nulls[attidx] = true;
deltatup->changed[attidx] = false;
continue;
}
/*
* Column is marked LOG_OLD_VALUE=true. We use that as flag
* to apply the delta between the remote old and new instead
* of the plain new value.
*
* To perform the actual delta math we need the functions behind
* the '+' and '-' operators for the data type.
*
* XXX: This is currently hardcoded for the builtin data types
* we support. Ideally we would lookup those operators in the
* system cache, but that isn't straight forward and we get into
* all sorts of trouble when it comes to user defined data types
* and the search path.
*/
att = TupleDescAttr(tupdesc, attidx);
switch (att->atttypid)
{
case INT2OID:
func_add = int2pl;
func_sub = int2mi;
break;
case INT4OID:
func_add = int4pl;
func_sub = int4mi;
break;
case INT8OID:
func_add = int8pl;
func_sub = int8mi;
break;
case FLOAT4OID:
func_add = float4pl;
func_sub = float4mi;
break;
case FLOAT8OID:
func_add = float8pl;
func_sub = float8mi;
break;
case NUMERICOID:
func_add = numeric_add;
func_sub = numeric_sub;
break;
case MONEYOID:
func_add = cash_pl;
func_sub = cash_mi;
break;
#if 0
/*
* BOOL is supposed to follow OR logic. But this code only
* works if we have a conflict. A local transaction is not
* prevented from changing it back to false, and it won't
* propagate. We need to come up with a different solution.
*/
case BOOLOID:
func_add = boolor_statefunc;
func_sub = boolor_statefunc;
break;
#endif
default:
elog(ERROR, "spock delta replication for type %d not supported",
att->atttypid);
}
if (oldtup->nulls[attidx])
{
/*
* This is a special case. Columns for delta apply need to
* be marked NOT NULL and LOG_OLD_VALUE=true. During this
* remote UPDATE LOG_OLD_VALUE setting was false. We use this
* as a flag to force plain NEW value application. This is
* useful in case a server ever gets out of sync.
*/
deltatup->values[attidx] = newtup->values[attidx];
deltatup->nulls[attidx] = false;
deltatup->changed[attidx] = true;
}
else
{
/* We also need the old value of the current local tuple */
loc_value = heap_getattr(TTS_TUP(localslot), attidx + 1, tupdesc,
&loc_isnull);
/* Finally we can do the actual delta apply */
delta = DirectFunctionCall2(func_sub,
newtup->values[attidx],
oldtup->values[attidx]);
deltatup->values[attidx] = DirectFunctionCall2(func_add, loc_value,
delta);
deltatup->nulls[attidx] = false;
deltatup->changed[attidx] = true;
}
}
}
static ApplyExecState *
init_apply_exec_state(SpockRelation *rel)
{
ApplyExecState *aestate = palloc0(sizeof(ApplyExecState));
/* Initialize the executor state. */
aestate->estate = create_estate_for_relation(rel->rel, true);
aestate->resultRelInfo = makeNode(ResultRelInfo);
InitResultRelInfo(aestate->resultRelInfo, rel->rel, 1, 0);
#if PG_VERSION_NUM < 140000
aestate->estate->es_result_relations = aestate->resultRelInfo;
aestate->estate->es_num_result_relations = 1;
aestate->estate->es_result_relation_info = aestate->resultRelInfo;
#endif
aestate->slot = ExecInitExtraTupleSlot(aestate->estate);
ExecSetSlotDescriptor(aestate->slot, RelationGetDescr(rel->rel));
if (aestate->resultRelInfo->ri_TrigDesc)
EvalPlanQualInit(&aestate->epqstate, aestate->estate, NULL, NIL, -1);
/* Prepare to catch AFTER triggers. */
AfterTriggerBeginQuery();
return aestate;
}
static void
finish_apply_exec_state(ApplyExecState *aestate)
{
/* Close indexes */
ExecCloseIndices(aestate->resultRelInfo);
/* Handle queued AFTER triggers. */
AfterTriggerEndQuery(aestate->estate);
/* Terminate EPQ execution if active. */
if (aestate->resultRelInfo->ri_TrigDesc)
EvalPlanQualEnd(&aestate->epqstate);
/* Cleanup tuple table. */
ExecResetTupleTable(aestate->estate->es_tupleTable, true);
/* Free the memory. */
FreeExecutorState(aestate->estate);
pfree(aestate);
}
/*
* Handle insert via low level api.
*/
void
spock_apply_heap_insert(SpockRelation *rel, SpockTupleData *newtup)
{
ApplyExecState *aestate;
Oid conflicts_idx_id;
TupleTableSlot *localslot;
HeapTuple remotetuple;
HeapTuple applytuple;
SpockConflictResolution resolution;
List *recheckIndexes = NIL;
MemoryContext oldctx;
bool has_before_triggers = false;
/* Initialize the executor state. */
aestate = init_apply_exec_state(rel);
localslot = table_slot_create(rel->rel, &aestate->estate->es_tupleTable);
/* update stats */
handle_stats_counter(rel->rel, MyApplyWorker->subid,
SPOCK_STATS_INSERT_COUNT, 1);
ExecOpenIndices(aestate->resultRelInfo
, false
);
/*
* Check for existing tuple with same key in any unique index containing
* only normal columns. This doesn't just check the replica identity index,
* but it'll prefer it and use it first.
*/
conflicts_idx_id = spock_tuple_find_conflict(aestate->resultRelInfo,
newtup,
localslot);
/* Process and store remote tuple in the slot */
oldctx = MemoryContextSwitchTo(GetPerTupleMemoryContext(aestate->estate));
fill_missing_defaults(rel, aestate->estate, newtup);
remotetuple = heap_form_tuple(RelationGetDescr(rel->rel),
newtup->values, newtup->nulls);
MemoryContextSwitchTo(oldctx);
ExecStoreHeapTuple(remotetuple, aestate->slot, true);
if (aestate->resultRelInfo->ri_TrigDesc &&
aestate->resultRelInfo->ri_TrigDesc->trig_insert_before_row)
{
has_before_triggers = true;
if (!ExecBRInsertTriggers(aestate->estate,
aestate->resultRelInfo,
aestate->slot))
{
finish_apply_exec_state(aestate);
return;
}
}
/* trigger might have changed tuple */
remotetuple = ExecFetchSlotHeapTuple(aestate->slot, true, NULL);
/* Did we find matching key in any candidate-key index? */
if (OidIsValid(conflicts_idx_id))
{
TransactionId xmin;
TimestampTz local_ts;
RepOriginId local_origin;
bool apply;
bool local_origin_found;
local_origin_found = get_tuple_origin(RelationGetRelid(rel->rel),
TTS_TUP(localslot),
NULL, &xmin,
&local_origin, &local_ts);
/* Tuple already exists, try resolving conflict. */
apply = try_resolve_conflict(rel->rel, TTS_TUP(localslot),
remotetuple, &applytuple,
local_origin, local_ts,
&resolution);
spock_report_conflict(CONFLICT_INSERT_INSERT, rel,
TTS_TUP(localslot), NULL, remotetuple,
applytuple, resolution, xmin,
local_origin_found, local_origin,
local_ts, conflicts_idx_id,
has_before_triggers);
if (apply)
{
bool update_indexes;
if (applytuple != remotetuple)
ExecStoreHeapTuple(applytuple, aestate->slot, false);
if (aestate->resultRelInfo->ri_TrigDesc &&
aestate->resultRelInfo->ri_TrigDesc->trig_update_before_row)
{
if (!ExecBRUpdateTriggers(aestate->estate,
&aestate->epqstate,
aestate->resultRelInfo,
&(TTS_TUP(localslot)->t_self),
NULL,
aestate->slot))
{
finish_apply_exec_state(aestate);
return;
}
}
/* trigger might have changed tuple */
remotetuple = ExecFetchSlotHeapTuple(aestate->slot, true, NULL);
/* Check the constraints of the tuple */
if (rel->rel->rd_att->constr)
ExecConstraints(aestate->resultRelInfo, aestate->slot,
aestate->estate);
simple_table_tuple_update(rel->rel,
&(localslot->tts_tid),
aestate->slot,
aestate->estate->es_snapshot,
&update_indexes);
if (update_indexes)
recheckIndexes = UserTableUpdateOpenIndexes(aestate->resultRelInfo,
aestate->estate,
aestate->slot,
true);
/* AFTER ROW UPDATE Triggers */
ExecARUpdateTriggers(aestate->estate, aestate->resultRelInfo,
&(TTS_TUP(localslot)->t_self),
NULL, aestate->slot, recheckIndexes);
}
}
else
{
/* Check the constraints of the tuple */
if (rel->rel->rd_att->constr)
ExecConstraints(aestate->resultRelInfo, aestate->slot,
aestate->estate);
simple_table_tuple_insert(aestate->resultRelInfo->ri_RelationDesc, aestate->slot);
UserTableUpdateOpenIndexes(aestate->resultRelInfo, aestate->estate, aestate->slot, false);
/* AFTER ROW INSERT Triggers */
ExecARInsertTriggers(aestate->estate, aestate->resultRelInfo,
aestate->slot, recheckIndexes);
}
finish_apply_exec_state(aestate);
CommandCounterIncrement();
}
/*
* Handle update via low level api.
*/
void
spock_apply_heap_update(SpockRelation *rel, SpockTupleData *oldtup,
SpockTupleData *newtup)
{
ApplyExecState *aestate;
bool found;
TupleTableSlot *localslot;
HeapTuple remotetuple;
List *recheckIndexes = NIL;
MemoryContext oldctx;
Oid replident_idx_id;
bool has_before_triggers = false;
bool is_delta_apply = false;
/* Initialize the executor state. */
aestate = init_apply_exec_state(rel);
localslot = table_slot_create(rel->rel, &aestate->estate->es_tupleTable);
/* update stats */
handle_stats_counter(rel->rel, MyApplyWorker->subid,
SPOCK_STATS_UPDATE_COUNT, 1);
/* Search for existing tuple with same key */
found = spock_tuple_find_replidx(aestate->resultRelInfo, oldtup, localslot,
&replident_idx_id);
/*
* Tuple found, update the local tuple.
*
* Note this will fail if there are other unique indexes and one or more of
* them would be violated by the new tuple.
*/
if (found)
{
TransactionId xmin;
TimestampTz local_ts;
RepOriginId local_origin;
bool local_origin_found;
bool apply;
HeapTuple applytuple;
/* Process and store remote tuple in the slot */
oldctx = MemoryContextSwitchTo(GetPerTupleMemoryContext(aestate->estate));
fill_missing_defaults(rel, aestate->estate, newtup);
remotetuple = heap_modify_tuple(TTS_TUP(localslot),
RelationGetDescr(rel->rel),
newtup->values,
newtup->nulls,
newtup->changed);
MemoryContextSwitchTo(oldctx);
ExecStoreHeapTuple(remotetuple, aestate->slot, true);
if (aestate->resultRelInfo->ri_TrigDesc &&
aestate->resultRelInfo->ri_TrigDesc->trig_update_before_row)
{
has_before_triggers = true;
if (!ExecBRUpdateTriggers(aestate->estate,
&aestate->epqstate,
aestate->resultRelInfo,
&(TTS_TUP(localslot)->t_self),
NULL, aestate->slot))
{
finish_apply_exec_state(aestate);
return;
}
}
/* trigger might have changed tuple */
remotetuple = ExecFetchSlotHeapTuple(aestate->slot, true, NULL);
local_origin_found = get_tuple_origin(RelationGetRelid(rel->rel),
TTS_TUP(localslot),
&(localslot->tts_tid), &xmin,
&local_origin, &local_ts);
/*
* If the local tuple was previously updated by different transaction
* on different server, consider this to be conflict and resolve it.
*/
if (local_origin_found &&
xmin != GetTopTransactionId() &&
local_origin != replorigin_session_origin)
{
SpockConflictResolution resolution;
apply = try_resolve_conflict(rel->rel, TTS_TUP(localslot),
remotetuple, &applytuple,
local_origin, local_ts,
&resolution);
spock_report_conflict(CONFLICT_UPDATE_UPDATE, rel,
TTS_TUP(localslot), oldtup,
remotetuple, applytuple, resolution,
xmin, local_origin_found, local_origin,
local_ts, replident_idx_id,
has_before_triggers);
if (applytuple != remotetuple)
ExecStoreHeapTuple(applytuple, aestate->slot, false);
}
else
{
apply = true;
applytuple = remotetuple;
}
/*
* If the relation has columns that are marked LOG_OLD_VALUE
* we apply the delta between the remote new and old values.
*/
if (relation_has_delta_columns(rel))
{
SpockTupleData deltatup;
HeapTuple currenttuple;
currenttuple = ExecFetchSlotHeapTuple(aestate->slot, true, NULL);
oldctx = MemoryContextSwitchTo(GetPerTupleMemoryContext(aestate->estate));
build_delta_tuple(rel, oldtup, newtup, &deltatup, localslot);
applytuple = heap_modify_tuple(currenttuple,
RelationGetDescr(rel->rel),
deltatup.values,
deltatup.nulls,
deltatup.changed);
MemoryContextSwitchTo(oldctx);
ExecStoreHeapTuple(applytuple, aestate->slot, true);
if (!apply)
{
is_delta_apply = true;
apply = true;
/* Count the DCA event in stats */
handle_stats_counter(rel->rel, MyApplyWorker->subid,
SPOCK_STATS_DCA_COUNT, 1);
}
}
if (apply)
{
bool update_indexes;
/* Check the constraints of the tuple */
if (rel->rel->rd_att->constr)
ExecConstraints(aestate->resultRelInfo, aestate->slot,
aestate->estate);
simple_table_tuple_update(rel->rel,
&(localslot->tts_tid),
aestate->slot,
aestate->estate->es_snapshot,
&update_indexes);
if (update_indexes)
{
ExecOpenIndices(aestate->resultRelInfo
, false
);
recheckIndexes = UserTableUpdateOpenIndexes(aestate->resultRelInfo,
aestate->estate,
aestate->slot,
true);
}
if (is_delta_apply)
{
/*
* We forced an update to a row that we normally had
* to skip because it has delta resolve columns. Remember
* the correct origin, xmin and commit timestamp for
* get_tuple_origion() to figure it out.
*/
spock_cth_store(RelationGetRelid(rel->rel),
&(aestate->slot->tts_tid), local_origin,
GetTopTransactionId(), local_ts, false);
}
/* AFTER ROW UPDATE Triggers */
ExecARUpdateTriggers(aestate->estate, aestate->resultRelInfo,
&(TTS_TUP(localslot)->t_self),
NULL, aestate->slot, recheckIndexes);
}
}
else
{
/*
* The tuple to be updated could not be found.
*
* We can't do INSERT here because we might not have whole tuple.
*/
remotetuple = heap_form_tuple(RelationGetDescr(rel->rel),
newtup->values,
newtup->nulls);
spock_report_conflict(CONFLICT_UPDATE_DELETE, rel, NULL, oldtup,
remotetuple, NULL, SpockResolution_Skip,
InvalidTransactionId, false,
InvalidRepOriginId, (TimestampTz)0,
replident_idx_id, has_before_triggers);
}
/* Cleanup. */
finish_apply_exec_state(aestate);
CommandCounterIncrement();
}
/*
* Handle delete via low level api.
*/
void
spock_apply_heap_delete(SpockRelation *rel, SpockTupleData *oldtup)
{
ApplyExecState *aestate;
TupleTableSlot *localslot;
Oid replident_idx_id;
bool has_before_triggers = false;
/* Initialize the executor state. */
aestate = init_apply_exec_state(rel);
localslot = table_slot_create(rel->rel, &aestate->estate->es_tupleTable);
/* update stats */
handle_stats_counter(rel->rel, MyApplyWorker->subid,
SPOCK_STATS_DELETE_COUNT, 1);
if (spock_tuple_find_replidx(aestate->resultRelInfo, oldtup, localslot,
&replident_idx_id))
{
if (aestate->resultRelInfo->ri_TrigDesc &&
aestate->resultRelInfo->ri_TrigDesc->trig_delete_before_row)
{
bool dodelete = ExecBRDeleteTriggers(aestate->estate,
&aestate->epqstate,
aestate->resultRelInfo,
&(TTS_TUP(localslot)->t_self),
NULL);
has_before_triggers = true;
if (!dodelete) /* "do nothing" */
{
finish_apply_exec_state(aestate);
return;
}
}
/* Tuple found, delete it. */
simple_heap_delete(rel->rel, &(TTS_TUP(localslot)->t_self));
/* AFTER ROW DELETE Triggers */
ExecARDeleteTriggers(aestate->estate, aestate->resultRelInfo,
&(TTS_TUP(localslot)->t_self), NULL);
}
else
{
/* The tuple to be deleted could not be found. */
HeapTuple remotetuple = heap_form_tuple(RelationGetDescr(rel->rel),
oldtup->values, oldtup->nulls);
spock_report_conflict(CONFLICT_DELETE_DELETE, rel, NULL, oldtup,
remotetuple, NULL, SpockResolution_Skip,
InvalidTransactionId, false,
InvalidRepOriginId, (TimestampTz)0,
replident_idx_id, has_before_triggers);
}
/* Cleanup. */
finish_apply_exec_state(aestate);
CommandCounterIncrement();
}
bool
spock_apply_heap_can_mi(SpockRelation *rel)
{
/* Multi insert is only supported when conflicts result in errors. */
return spock_conflict_resolver == SPOCK_RESOLVE_ERROR;
}
/*
* MultiInsert initialization.
*/
static void
spock_apply_heap_mi_start(SpockRelation *rel)
{
MemoryContext oldctx;
ApplyExecState *aestate;
ResultRelInfo *resultRelInfo;
TupleDesc desc;
bool volatile_defexprs = false;
if (spkmistate && spkmistate->rel == rel)
return;
if (spkmistate && spkmistate->rel != rel)
spock_apply_heap_mi_finish(spkmistate->rel);
oldctx = MemoryContextSwitchTo(TopTransactionContext);
/* Initialize new MultiInsert state. */
spkmistate = palloc0(sizeof(ApplyMIState));
spkmistate->rel = rel;
/* Initialize the executor state. */
spkmistate->aestate = aestate = init_apply_exec_state(rel);
MemoryContextSwitchTo(TopTransactionContext);
resultRelInfo = aestate->resultRelInfo;
ExecOpenIndices(resultRelInfo
, false
);
/* Check if table has any volatile default expressions. */
desc = RelationGetDescr(rel->rel);
if (desc->natts != rel->natts)
{
int attnum;
for (attnum = 0; attnum < desc->natts; attnum++)
{
Expr *defexpr;
if (TupleDescAttr(desc,attnum)->attisdropped)
continue;
defexpr = (Expr *) build_column_default(rel->rel, attnum + 1);
if (defexpr != NULL)
{
/* Run the expression through planner */
defexpr = expression_planner(defexpr);
volatile_defexprs = contain_volatile_functions_not_nextval((Node *) defexpr);
if (volatile_defexprs)
break;
}
}
}
/*
* Decide if to buffer tuples based on the collected information
* about the table.
*/
if ((resultRelInfo->ri_TrigDesc != NULL &&
(resultRelInfo->ri_TrigDesc->trig_insert_before_row ||
resultRelInfo->ri_TrigDesc->trig_insert_instead_row)) ||
volatile_defexprs)
{
spkmistate->maxbuffered_tuples = 1;
}
else
{
spkmistate->maxbuffered_tuples = 1000;
}
spkmistate->cid = GetCurrentCommandId(true);
spkmistate->bistate = GetBulkInsertState();
/* Make the space for buffer. */
spkmistate->buffered_tuples = palloc0(spkmistate->maxbuffered_tuples * sizeof(TupleTableSlot *));
spkmistate->nbuffered_tuples = 0;
MemoryContextSwitchTo(oldctx);