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MDEV-8840: ANALYZE FORMAT=JSON produces wrong data with BKA

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The issue was that r_loops, r_rows and r_filtered in ANALYZE FORMAT= JSON were not
calculated for the table on which we were performing the MRR scan in the BKA join
Fixed this by adding respective counter in the JOIN_TAB_SCAN_MRR::open and JOIN_TAB_SCAN_MRR::next
This commit is contained in:
Varun Gupta
2017-09-24 23:37:57 +05:30
parent ea2162b6aa
commit f91eb71e1c
2 changed files with 6 additions and 3 deletions
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6
mysql-test/r/explain_json.result
View File

@ -1524,12 +1524,12 @@ ANALYZE
"key_length": "5",
"used_key_parts": ["a"],
"ref": ["test.t3.a"],
"r_loops": 0,
"r_loops": 1,
"rows": 1,
"r_rows": null,
"r_rows": 10,
"r_total_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": null,
"r_filtered": 100,
"index_condition_bka": "((t4.b + 1) <= (t3.b + 1))"
},
"buffer_type": "flat",

3
sql/sql_join_cache.cc
View File

@ -3877,6 +3877,7 @@ int JOIN_TAB_SCAN_MRR::open()
/* Dynamic range access is never used with BKA */
DBUG_ASSERT(join_tab->use_quick != 2);
join_tab->tracker->r_scans++;
save_or_restore_used_tabs(join_tab, FALSE);
init_mrr_buff();
@ -3920,6 +3921,8 @@ int JOIN_TAB_SCAN_MRR::next()
int rc= join_tab->table->file->multi_range_read_next((range_id_t*)ptr) ? -1 : 0;
if (!rc)
{
join_tab->tracker->r_rows++;
join_tab->tracker->r_rows_after_where++;
/*
If a record in in an incremental cache contains no fields then the
association for the last record in cache will be equal to cache->end_pos