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improve rel size estimate

merge-cstore-pykello
Jeff Davis 2020-09-18 12:06:58 -07:00
parent a05e75a6d1
commit c303f0f135
1 changed files with 10 additions and 4 deletions
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14
cstore_tableam.c
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@ -549,11 +549,17 @@ cstore_estimate_rel_size(Relation rel, int32 *attr_widths,
BlockNumber *pages, double *tuples,
double *allvisfrac)
{
/* TODO */
*attr_widths = 12;
*tuples = 100;
*pages = 10;
RelationOpenSmgr(rel);
*pages = smgrnblocks(rel->rd_smgr, MAIN_FORKNUM);
*tuples = CStoreTableRowCount(rel);
/*
* Append-only, so everything is visible except in-progress or rolled-back
* transactions.
*/
*allvisfrac = 1.0;
get_rel_data_width(rel, attr_widths);
}