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tableam: Support for an index build's initial table scan(s).

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To support building indexes over tables of different AMs, the scans to
do so need to be routed through the table AM.  While moving a fair
amount of code, nearly all the changes are just moving code to below a
callback.

Currently the range based interface wouldn't make much sense for non
block based table AMs. But that seems aceptable for now.

Author: Andres Freund
Discussion: https://postgr.es/m/20180703070645.wchpu5muyto5n647@alap3.anarazel.de
This commit is contained in:
Andres Freund
2019-03-27 19:59:06 -07:00
parent 12bb35fc9b
commit 2a96909a4a
14 changed files with 1012 additions and 936 deletions
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8
src/backend/access/gist/gistbuild.c
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@ -19,6 +19,7 @@
#include "access/genam.h"
#include "access/gist_private.h"
#include "access/gistxlog.h"
#include "access/tableam.h"
#include "access/xloginsert.h"
#include "catalog/index.h"
#include "miscadmin.h"
@ -204,8 +205,9 @@ gistbuild(Relation heap, Relation index, IndexInfo *indexInfo)
/*
* Do the heap scan.
*/
reltuples = IndexBuildHeapScan(heap, index, indexInfo, true,
gistBuildCallback, (void *) &buildstate, NULL);
reltuples = table_index_build_scan(heap, index, indexInfo, true,
gistBuildCallback,
(void *) &buildstate, NULL);
/*
* If buffering was used, flush out all the tuples that are still in the
@ -454,7 +456,7 @@ calculatePagesPerBuffer(GISTBuildState *buildstate, int levelStep)
}
/*
* Per-tuple callback from IndexBuildHeapScan.
* Per-tuple callback for table_index_build_scan.
*/
static void
gistBuildCallback(Relation index,