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Added keyread_time() to HEAP

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The default keyread_time() was optimized for blocks and not suitable for
HEAP. The effect was the HEAP prefered table scans over ranges for btree
indexes.
Fixed also get_sweep_read_cost() for HEAP tables.
This commit is contained in:
Monty
2020-03-05 14:10:03 +02:00
parent a24d0926b9
commit c037cdadf4
6 changed files with 15 additions and 11 deletions
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3
sql/opt_range.cc
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@ -4897,7 +4897,8 @@ double get_sweep_read_cost(const PARAM *param, ha_rows records)
{
double result;
DBUG_ENTER("get_sweep_read_cost");
if (param->table->file->primary_key_is_clustered())
if (param->table->file->primary_key_is_clustered() ||
param->table->file->stats.block_size == 0 /* HEAP */)
{
/*
We are using the primary key to find the rows.