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tableam: Move heap specific logic from estimate_rel_size below tableam.

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This just moves the table/matview[/toast] determination of relation
size to a callback, and uses a copy of the existing logic to implement
that callback for heap.

It probably would make sense to also move the index specific logic
into a callback, so the metapage handling (and probably more) can be
index specific. But that's a separate task.

Author: Andres Freund
Discussion: https://postgr.es/m/20180703070645.wchpu5muyto5n647@alap3.anarazel.de
This commit is contained in:
Andres Freund
2019-03-30 16:40:33 -07:00
parent 737a292b5d
commit 696d78469f
4 changed files with 174 additions and 44 deletions
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src/include/optimizer/plancat.h
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@@ -33,6 +33,7 @@ extern List *infer_arbiter_indexes(PlannerInfo *root);
extern void estimate_rel_size(Relation rel, int32 *attr_widths,
BlockNumber *pages, double *tuples, double *allvisfrac);
extern int32 get_rel_data_width(Relation rel, int32 *attr_widths);
extern int32 get_relation_data_width(Oid relid, int32 *attr_widths);
extern bool relation_excluded_by_constraints(PlannerInfo *root,