Where can I find the code for extern OidFunctionCall7?

OidFunctionCall7 is called from costsize.c, in function void cost_index. From
the comments, I understand that there is an indirection mechanism here to
allow for different index access methods. Looking at fmgr.h where it is
declared is not clear to me where I would ultimately find the code.

Any pointers will be greatly appreciated

/*
* Call index-access-method-specific code to estimate the processing cost
* for scanning the index, as well as the selectivity of the index (ie,
* the fraction of main-table tuples we will have to retrieve) and its
* correlation to the main-table tuple order.
*/
OidFunctionCall7(index->amcostestimate,
PointerGetDatum(root),
PointerGetDatum(path),
Float8GetDatum(loop_count),
PointerGetDatum(&indexStartupCost),
PointerGetDatum(&indexTotalCost),
PointerGetDatum(&indexSelectivity),
PointerGetDatum(&indexCorrelation));

--
View this message in context: http://postgresql.1045698.n5.nabble.com/Where-can-I-find-the-code-for-extern-OidFunctionCall7-tp5769737.html
Sent from the PostgreSQL - hackers mailing list archive at Nabble.com.