Dear hackers,
I’m modifying backend source codes of pgsql.
While inspecting the heap_update function (src/backend/access/heapam.c),
I found that the relkind fields of all RelationData which is handed over to
heap_update are all the same as ‘r’.
I want to distinguish normal relation (actual table) from primary index
relation (primary indexes of some tables).
As you know, there are 6 different relkinds (I,r,S,u,t,v,c).
I guess primary index relation’s relkind’d be the same as normal
relation’s (i.e. ‘r’).
Is there any way I can distinguish normal relation from primary index
relation in the heap_update function?
In the following code, I want to make ‘doIcl = false’ for the primary
index relation.
Thank you for reading this.
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heap_update(Relation relation, ItemPointer otid, HeapTuple newtup,
ItemPointer ctid,
TransactionId *update_xmax,
CommandId cid, Snapshot
crosscheck, bool wait)
{
HTSU_Result result;
TransactionId xid = GetCurrentTransactionId();
Bitmapset *hot_attrs;
ItemId lp;
HeapTupleData oldtup;
HeapTuple heaptup;
Page page;
Buffer buffer, newbuf;
bool need_toast, already_marked;
Size newtupsize, pagefree;
bool have_tuple_lock = false;
bool iscombo;
bool use_hot_update = false;
bool all_visible_cleared = false;
bool all_visible_cleared_new = false;
/* hongs added; variables */
#ifdef USE_ICL
bool doIcl = false, newDoIcl = false;
BufferDesc *bufHdr = NULL;
BufferDesc *newBufHdr = NULL; //for inserting
icl log of PageSetLSN
Page newpage; //for inserting icl log of PageSetLSN
ItemId newlp;
if(relation->rd_rel->relkind != 'r') {
doIcl = true;
}
else
doIcl = false;
#endif
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- Best Regards
Hongchan
( <mailto:falls...@cs.yonsei.ac.kr> falls...@cs.yonsei.ac.kr, (02)2123-
7757) -
