I see, thanks.
I'm looking into the source code of statistic part now, and I'm a little
confused about the column staop presented in table pg_statistic,
in the pg_statisitc.h, the comment says:
/*
* To allow keeping statistics on different kinds of datatypes,
* we do not
Hi all,
I'm studying pg_statistic table and I find that column staop is related to
pg_operator, and different data types relate to different staop, but I
don't know where pgsql stores the mapping between pg_type and pg_operator,
does anyone have any idea about it? thanks!
but text[] is found in the query.
Thanks very much!
2014/1/15 Amit Langote amitlangot...@gmail.com
On Wed, Jan 15, 2014 at 11:08 PM, Felix.徐 ygnhz...@gmail.com wrote:
Hi all,
I'm studying pg_statistic table and I find that column staop is related
to
pg_operator, and different data types
Hi all,
I've set up a developing environment on my windows using Visual Studio
2012, everything works fine, except that the breakpoints set in analyze.c
are not triggered in debug mode (breakpoints in main.c and some
initialization code worked well), and I'm sure that line has been executed
since
Hi all,
I've learnt from the source code to open a table and scan it, like this:
Relation qma = try_relation_open(qmappersta, AccessShareLock);
if(qma!=NULL){
HeapScanDesc scan= heap_beginscan(qma,SnapshotNow,0,NULL);
HeapTuple tup;
TupleDesc tupDesc= RelationGetDescr(qma);
Datum
Hi all,
I'm talking about the source code of pgsql and I want to know how the
typing system works in pgsql.
A few functions can help us do the type conversion, for example:
Int32GetDatum -- convert a integer to a datum
Float8GetDatum -- convert double to a datum
cstring_to_text -- convert a
