/*
* transientrel_startup --- executor startup
*/
static void
transientrel_startup(DestReceiver *self, int operation, TupleDesc typeinfo)
{
DR_transientrel *myState = (DR_transientrel *) self;
Relation transientrel;
transientrel = heap_open(myState->transientoid, NoLock);
/*
* Fill private fields of myState for use by later routines
*/
myState->transientrel = transientrel;
myState->output_cid = GetCurrentCommandId(true);
/*
* We can skip WAL-logging the insertions, unless PITR or streaming
* replication is in use. We can skip the FSM in any case.
*/
myState->hi_options = HEAP_INSERT_SKIP_FSM | HEAP_INSERT_FROZEN;
if (!XLogIsNeeded())
myState->hi_options |= HEAP_INSERT_SKIP_WAL;
myState->bistate = GetBulkInsertState();
/* Not using WAL requires smgr_targblock be initially invalid */
Assert(RelationGetTargetBlock(transientrel) == InvalidBlockNumber);
}
/**
* @brief Initialize a BufferedWriter
*/
static void
BufferedWriterInit(BufferedWriter *self)
{
/*
* Set defaults to unspecified parameters.
*/
if (self->base.max_dup_errors < -1)
self->base.max_dup_errors = DEFAULT_MAX_DUP_ERRORS;
self->base.rel = heap_open(self->base.relid, AccessExclusiveLock);
VerifyTarget(self->base.rel, self->base.max_dup_errors);
self->base.desc = RelationGetDescr(self->base.rel);
SpoolerOpen(&self->spooler, self->base.rel, true, self->base.on_duplicate,
self->base.max_dup_errors, self->base.dup_badfile);
self->base.context = GetPerTupleMemoryContext(self->spooler.estate);
self->bistate = GetBulkInsertState();
self->cid = GetCurrentCommandId(true);
self->base.tchecker = CreateTupleChecker(self->base.desc);
self->base.tchecker->checker = (CheckerTupleProc) CoercionCheckerTuple;
}
/*
* intorel_startup --- executor startup
*/
static void
intorel_startup(DestReceiver *self, int operation, TupleDesc typeinfo)
{
DR_intorel *myState = (DR_intorel *) self;
IntoClause *into = myState->into;
bool is_matview;
char relkind;
CreateStmt *create;
Oid intoRelationId;
Relation intoRelationDesc;
RangeTblEntry *rte;
Datum toast_options;
ListCell *lc;
int attnum;
static char *validnsps[] = HEAP_RELOPT_NAMESPACES;
Assert(into != NULL); /* else somebody forgot to set it */
/* This code supports both CREATE TABLE AS and CREATE MATERIALIZED VIEW */
is_matview = (into->viewQuery != NULL);
relkind = is_matview ? RELKIND_MATVIEW : RELKIND_RELATION;
/*
* Create the target relation by faking up a CREATE TABLE parsetree and
* passing it to DefineRelation.
*/
create = makeNode(CreateStmt);
create->relation = into->rel;
create->tableElts = NIL; /* will fill below */
create->inhRelations = NIL;
create->ofTypename = NULL;
create->constraints = NIL;
create->options = into->options;
create->oncommit = into->onCommit;
create->tablespacename = into->tableSpaceName;
create->if_not_exists = false;
/*
* Build column definitions using "pre-cooked" type and collation info. If
* a column name list was specified in CREATE TABLE AS, override the
* column names derived from the query. (Too few column names are OK, too
* many are not.)
*/
lc = list_head(into->colNames);
for (attnum = 0; attnum < typeinfo->natts; attnum++)
{
Form_pg_attribute attribute = typeinfo->attrs[attnum];
ColumnDef *col = makeNode(ColumnDef);
TypeName *coltype = makeNode(TypeName);
if (lc)
{
col->colname = strVal(lfirst(lc));
lc = lnext(lc);
}
else
col->colname = NameStr(attribute->attname);
col->typeName = coltype;
col->inhcount = 0;
col->is_local = true;
col->is_not_null = false;
col->is_from_type = false;
col->storage = 0;
col->raw_default = NULL;
col->cooked_default = NULL;
col->collClause = NULL;
col->collOid = attribute->attcollation;
col->constraints = NIL;
col->fdwoptions = NIL;
coltype->names = NIL;
coltype->typeOid = attribute->atttypid;
coltype->setof = false;
coltype->pct_type = false;
coltype->typmods = NIL;
coltype->typemod = attribute->atttypmod;
coltype->arrayBounds = NIL;
coltype->location = -1;
/*
* It's possible that the column is of a collatable type but the
* collation could not be resolved, so double-check. (We must check
* this here because DefineRelation would adopt the type's default
* collation rather than complaining.)
*/
if (!OidIsValid(col->collOid) &&
type_is_collatable(coltype->typeOid))
ereport(ERROR,
(errcode(ERRCODE_INDETERMINATE_COLLATION),
errmsg("no collation was derived for column \"%s\" with collatable type %s",
col->colname, format_type_be(coltype->typeOid)),
errhint("Use the COLLATE clause to set the collation explicitly.")));
create->tableElts = lappend(create->tableElts, col);
}
if (lc != NULL)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("too many column names were specified")));
/*
* Actually create the target table
*/
intoRelationId = DefineRelation(create, relkind, InvalidOid);
/*
* If necessary, create a TOAST table for the target table. Note that
* AlterTableCreateToastTable ends with CommandCounterIncrement(), so that
* the TOAST table will be visible for insertion.
*/
CommandCounterIncrement();
/* parse and validate reloptions for the toast table */
toast_options = transformRelOptions((Datum) 0,
create->options,
"toast",
validnsps,
true, false);
(void) heap_reloptions(RELKIND_TOASTVALUE, toast_options, true);
AlterTableCreateToastTable(intoRelationId, toast_options);
/* Create the "view" part of a materialized view. */
if (is_matview)
{
/* StoreViewQuery scribbles on tree, so make a copy */
Query *query = (Query *) copyObject(into->viewQuery);
StoreViewQuery(intoRelationId, query, false);
CommandCounterIncrement();
}
/*
* Finally we can open the target table
*/
intoRelationDesc = heap_open(intoRelationId, AccessExclusiveLock);
/*
* Check INSERT permission on the constructed table.
*
* XXX: It would arguably make sense to skip this check if into->skipData
* is true.
*/
rte = makeNode(RangeTblEntry);
rte->rtekind = RTE_RELATION;
rte->relid = intoRelationId;
rte->relkind = relkind;
rte->requiredPerms = ACL_INSERT;
for (attnum = 1; attnum <= intoRelationDesc->rd_att->natts; attnum++)
rte->modifiedCols = bms_add_member(rte->modifiedCols,
attnum - FirstLowInvalidHeapAttributeNumber);
ExecCheckRTPerms(list_make1(rte), true);
/*
* Tentatively mark the target as populated, if it's a matview and we're
* going to fill it; otherwise, no change needed.
*/
if (is_matview && !into->skipData)
SetMatViewPopulatedState(intoRelationDesc, true);
/*
* Fill private fields of myState for use by later routines
*/
myState->rel = intoRelationDesc;
myState->output_cid = GetCurrentCommandId(true);
/*
* We can skip WAL-logging the insertions, unless PITR or streaming
* replication is in use. We can skip the FSM in any case.
*/
myState->hi_options = HEAP_INSERT_SKIP_FSM |
(XLogIsNeeded() ? 0 : HEAP_INSERT_SKIP_WAL);
myState->bistate = GetBulkInsertState();
/* Not using WAL requires smgr_targblock be initially invalid */
Assert(RelationGetTargetBlock(intoRelationDesc) == InvalidBlockNumber);
}
Datum partition_insert_trigger(PG_FUNCTION_ARGS)
{
TriggerData *trigdata = (TriggerData *) fcinfo->context;
char *date_time;
char child_table[sizeof(TABLE)+sizeof("2012_09_10")] = TABLE;
int partition_field;
Relation child_table_id;
Oid child_table_oid;
BulkInsertState bistate = GetBulkInsertState();
TupleTableSlot *slot;
EState *estate = CreateExecutorState();
ResultRelInfo *resultRelInfo = makeNode(ResultRelInfo);
List *recheckIndexes = NIL;
/* make sure it's called as a trigger at all */
if (!CALLED_AS_TRIGGER(fcinfo))
elog(ERROR, "partition_insert_trigger: not called by trigger manager");
/* Sanity checks */
if (!TRIGGER_FIRED_BY_INSERT(trigdata->tg_event) || !TRIGGER_FIRED_BEFORE(trigdata->tg_event))
elog(ERROR, "partition_insert_trigger: not called on insert before");
#ifdef DEBUG
elog(INFO, "Trigger Called for: %s", SPI_getrelname(trigdata->tg_relation));
#endif
// Get the field number for the partition
partition_field = SPI_fnumber(trigdata->tg_relation->rd_att, PARTITION_COLUMN);
// Get the value for the partition_field
date_time = SPI_getvalue(trigdata->tg_trigtuple, trigdata->tg_relation->rd_att, partition_field);
//make sure date was specified
if (!date_time)
elog(ERROR, "You cannot insert data without specifying a value for the column %s", PARTITION_COLUMN);
#ifdef DEBUG
elog(INFO, "Trying to insert date_time=%s", date_time);
#endif
//add date_time, child_table_2012_01_23
strncpy(child_table + sizeof(TABLE) -1 , date_time, 4); //2012
child_table[sizeof(TABLE) + 3] = SEPARATOR; //2012_
strncpy(child_table + sizeof(TABLE) + 4 , date_time + 5, 2); //2012_01
child_table[sizeof(TABLE) + 6] = SEPARATOR; //2012_01_
strncpy(child_table + sizeof(TABLE) + 7 , date_time + 8, 2); //2012_01_23
#ifdef DEBUG
elog(INFO, "New table will be %s", child_table);
#endif
pfree(date_time);
//if you care about triggers on the child tables, call ExecBRInsertTriggers
//don't care, continue
//get the OID of the table we are looking for to insert
child_table_oid = RelnameGetRelid(child_table); //Look for child child_table
if (child_table_oid == InvalidOid){
elog(INFO, "partition_insert_trigger: Invalid child table %s, inserting data to main table %s", child_table, TABLE);
return PointerGetDatum(trigdata->tg_trigtuple);
}
//get the descriptor of the table we are looking for
child_table_id = RelationIdGetRelation(child_table_oid); //Get the child relation descriptor
if (child_table_id == NULL){
elog(ERROR, "partition_insert_trigger: Failed to locate relation for child table %s, inserting data to main table %s", child_table, TABLE);
return PointerGetDatum(trigdata->tg_trigtuple);
}
//set the resultRelInfo
resultRelInfo->ri_RangeTableIndex = 1; /* dummy */
resultRelInfo->ri_RelationDesc = child_table_id;
//setup the estate, not sure why
estate->es_result_relations = resultRelInfo;
estate->es_num_result_relations = 1;
estate->es_result_relation_info = resultRelInfo;
/* Set up a tuple slot not sure why yet */
slot = MakeSingleTupleTableSlot(trigdata->tg_relation->rd_att);
ExecStoreTuple(trigdata->tg_trigtuple, slot, InvalidBuffer, false);
//heap_insert(child_table_id, trigdata->tg_trigtuple, GetCurrentCommandId(true), use_wal, bistate);
simple_heap_insert(child_table_id, trigdata->tg_trigtuple);
if (resultRelInfo->ri_NumIndices > 0)
recheckIndexes = ExecInsertIndexTuples(slot, &(trigdata->tg_trigtuple->t_self), estate);
// not sure if this would work CatalogUpdateIndexes(child_table_id, trigdata->tg_trigtuple)
//free the used memory
list_free(recheckIndexes);
ExecDropSingleTupleTableSlot(slot); //saw this somewhere :P
RelationClose(child_table_id); //Must be called to free the relation memory page
FreeBulkInsertState(bistate); // ? not sure if needed ?
//If return next line will add to the regular table
//return PointerGetDatum(trigdata->tg_trigtuple);
//Return Null data, still have to figure out to return a proper X rows affected
return PointerGetDatum(NULL);
}