Datum
caql_insert_to_in_memory_pg_attribute(PG_FUNCTION_ARGS)
{
Oid attrelid = PG_GETARG_OID(0);
char *attname = text_to_cstring(PG_GETARG_TEXT_P(1));
AttrNumber attno = PG_GETARG_INT16(2);
cqContext *pcqCtx = caql_beginscan(
NULL,
cql("INSERT INTO pg_attribute", NULL));
FormData_pg_attribute attributeD;
HeapTuple attributeTuple = heap_addheader(Natts_pg_attribute,
false,
ATTRIBUTE_TUPLE_SIZE,
(void *) &attributeD);
Form_pg_attribute attribute = (Form_pg_attribute) GETSTRUCT(attributeTuple);
attribute->attrelid = attrelid;
namestrcpy(&(attribute->attname), attname);
attribute->attnum = attno;
caql_insert_inmem(pcqCtx, attributeTuple);
caql_endscan(pcqCtx);
StringInfoData buf;
initStringInfo(&buf);
appendStringInfo(&buf, "inserted tuple to pg_attribute (attrelid %d, attname %s, attno %d)", attribute->attrelid, NameStr(attribute->attname), attribute->attnum);
PG_RETURN_TEXT_P(cstring_to_text(buf.data));
}
/* ----------------------------------------------------------------
* UpdateRelationRelation
* ----------------------------------------------------------------
*/
static void
UpdateRelationRelation(Relation indexRelation)
{
Relation pg_class;
HeapTuple tuple;
pg_class = heap_openr(RelationRelationName, RowExclusiveLock);
/* XXX Natts_pg_class_fixed is a hack - see pg_class.h */
tuple = heap_addheader(Natts_pg_class_fixed,
true,
CLASS_TUPLE_SIZE,
(void *) indexRelation->rd_rel);
/*
* the new tuple must have the oid already chosen for the index. sure
* would be embarrassing to do this sort of thing in polite company.
*/
HeapTupleSetOid(tuple, RelationGetRelid(indexRelation));
simple_heap_insert(pg_class, tuple);
/* update the system catalog indexes */
CatalogUpdateIndexes(pg_class, tuple);
heap_freetuple(tuple);
heap_close(pg_class, RowExclusiveLock);
}
/* ----------------------------------------------------------------
* AppendAttributeTuples
* ----------------------------------------------------------------
*/
static void
AppendAttributeTuples(Relation indexRelation, int numatts)
{
Relation pg_attribute;
CatalogIndexState indstate;
TupleDesc indexTupDesc;
HeapTuple new_tuple;
int i;
/*
* open the attribute relation and its indexes
*/
pg_attribute = heap_openr(AttributeRelationName, RowExclusiveLock);
indstate = CatalogOpenIndexes(pg_attribute);
/*
* insert data from new index's tupdesc into pg_attribute
*/
indexTupDesc = RelationGetDescr(indexRelation);
for (i = 0; i < numatts; i++)
{
/*
* There used to be very grotty code here to set these fields, but
* I think it's unnecessary. They should be set already.
*/
Assert(indexTupDesc->attrs[i]->attnum == i + 1);
Assert(indexTupDesc->attrs[i]->attcacheoff == -1);
new_tuple = heap_addheader(Natts_pg_attribute,
false,
ATTRIBUTE_TUPLE_SIZE,
(void *) indexTupDesc->attrs[i]);
simple_heap_insert(pg_attribute, new_tuple);
CatalogIndexInsert(indstate, new_tuple);
heap_freetuple(new_tuple);
}
CatalogCloseIndexes(indstate);
heap_close(pg_attribute, RowExclusiveLock);
}
