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MDEV-17568: LATERAL DERIVED is not clearly visible in EXPLAIN FORMAT=JSON

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Make LATERAL DERIVED tables visible in EXPLAIN FORMAT=JSON output.
This commit is contained in:
Sergei Petrunia
2020-05-06 23:44:34 +03:00
parent 8648b9bed8
commit d01d94d77b
4 changed files with 17 additions and 0 deletions
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2
sql/sql_select.cc
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@ -26014,6 +26014,8 @@ int JOIN::save_explain_data_intern(Explain_query *output,
xpl_sel->select_id= join->select_lex->select_number;
xpl_sel->select_type= join->select_lex->type;
xpl_sel->linkage= select_lex->linkage;
xpl_sel->is_lateral= ((select_lex->linkage == DERIVED_TABLE_TYPE) &&
(select_lex->uncacheable & UNCACHEABLE_DEPENDENT));
if (select_lex->master_unit()->derived)
xpl_sel->connection_type= Explain_node::EXPLAIN_NODE_DERIVED;