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| author | Sergei Petrunia <psergey@askmonty.org> | 2014-05-27 21:04:45 +0400 |
|---|---|---|
| committer | Sergei Petrunia <psergey@askmonty.org> | 2014-05-27 21:04:45 +0400 |
| commit | 5cfd3270ec79238b27765af3062ae7d97f6f06d0 (patch) | |
| tree | 2bfa2bb941567c1eb7f81d7b86962973e6fbf1c6 /sql/sql_class.cc | |
| parent | 0925ab9d88f4328810d25392333a4cac11c6e694 (diff) | |
| download | mariadb-git-10.1-explain-json.tar.gz | |
MDEV-6109: EXPLAIN JSON10.1-explain-json
- First code, "EXPLAIN FORMAT=JSON stmt" and "ANALYZE FORMAT=JSON stmt"
work for basic queries. Complex constructs (e.g subqueries, etc) not
yet supported.
- No test infrastructure yet
Diffstat (limited to 'sql/sql_class.cc')
| -rw-r--r-- | sql/sql_class.cc | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/sql/sql_class.cc b/sql/sql_class.cc index 8d6ddc0bb08..3d1476715e5 100644 --- a/sql/sql_class.cc +++ b/sql/sql_class.cc @@ -2271,7 +2271,10 @@ CHANGED_TABLE_LIST* THD::changed_table_dup(const char *key, long key_length) int THD::send_explain_fields(select_result *result) { List<Item> field_list; - make_explain_field_list(field_list); + if (lex->explain_json) + make_explain_json_field_list(field_list); + else + make_explain_field_list(field_list); result->prepare(field_list, NULL); return (result->send_result_set_metadata(field_list, Protocol::SEND_NUM_ROWS | @@ -2279,6 +2282,13 @@ int THD::send_explain_fields(select_result *result) } +void THD::make_explain_json_field_list(List<Item> &field_list) +{ + Item *item= new Item_empty_string("EXPLAIN", 78, system_charset_info); + field_list.push_back(item); +} + + /* Populate the provided field_list with EXPLAIN output columns. this->lex->describe has the EXPLAIN flags |