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EXPLAIN FORMAT=JSON: Full scan on NULL key (join case)

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This commit is contained in:
Sergei Petrunia
2014-12-06 03:11:03 +03:00
parent a80a797686
commit 5ee1c25fa8
5 changed files with 85 additions and 0 deletions
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8
sql/sql_explain.cc
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@ -1139,6 +1139,8 @@ void Explain_table_access::tag_to_json(Json_writer *writer, enum explain_extra_t
case ET_START_TEMPORARY:
case ET_END_TEMPORARY:
/* Handled as "duplicates_removal: { ... } */
case ET_FULL_SCAN_ON_NULL_KEY:
/* Handled in full_scan_on_null_key */
break;
case ET_FIRST_MATCH:
writer->add_member("first_match").add_str(firstmatch_table_name.c_ptr());
@ -1188,6 +1190,9 @@ void Explain_table_access::print_explain_json(Explain_query *query,
add_json_keyset(writer, "keys", &possible_keys);
}
if (full_scan_on_null_key)
writer->add_member("full-scan-on-null_key").start_object();
writer->add_member("table").start_object();
writer->add_member("table_name").add_str(table_name);
@ -1289,6 +1294,9 @@ void Explain_table_access::print_explain_json(Explain_query *query,
tag_to_json(writer, extra_tags.at(i));
}
if (full_scan_on_null_key)
writer->end_object(); //"full-scan-on-null_key"
if (range_checked_fer)
writer->end_object(); // "range-checked-for-each-record"