database/mariadb-columnstore-engine
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fix(plugin): MCOL-5703 fix server crash on 'UNION ALL VALUES' queries

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Such queries are not supported by the ColumnStore anyway.
This commit is contained in:
Aleksei Antipovskii
2024-10-08 19:05:21 +02:00
committed by Leonid Fedorov
parent d02e2854ae
commit 0f202fb633
1 changed files with 11 additions and 6 deletions
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17
dbcon/mysql/ha_mcs_pushdown.cpp
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@ -680,7 +680,7 @@ select_handler* create_columnstore_select_handler_(THD* thd, SELECT_LEX* sel_lex
create_explain_query_if_not_exists(thd->lex, thd->mem_root);
Query_arena *arena, backup;
arena = thd->activate_stmt_arena_if_needed(&backup);
COND* conds = join->conds;
COND* conds = join ? join->conds : nullptr;
select_lex->where = conds;
if (isPS)
@ -688,7 +688,11 @@ select_handler* create_columnstore_select_handler_(THD* thd, SELECT_LEX* sel_lex
select_lex->prep_where = conds ? conds->copy_andor_structure(thd) : 0;
}
select_lex->update_used_tables();
// no join indicates that there is no tables to update
if (join)
{
select_lex->update_used_tables();
}
if (arena)
thd->restore_active_arena(arena, &backup);
@ -714,7 +718,8 @@ select_handler* create_columnstore_select_handler_(THD* thd, SELECT_LEX* sel_lex
JOIN* join = select_lex->join;
// This is taken from JOIN::optimize()
join->fields = &select_lex->item_list;
if (join)
join->fields = &select_lex->item_list;
// Instantiate handler::table, which is the place for the result set.
if ((i == 0) && handler->prepare())
@ -758,7 +763,7 @@ select_handler* create_columnstore_select_handler_(THD* thd, SELECT_LEX* sel_lex
return handler;
}
if (!join->zero_result_cause && join->exec_const_cond && !join->exec_const_cond->val_int())
if (join && !join->zero_result_cause && join->exec_const_cond && !join->exec_const_cond->val_int())
join->zero_result_cause = "Impossible WHERE noticed after reading const tables";
// We've called exec_const_cond->val_int(). This may have caused an error.
@ -769,7 +774,7 @@ select_handler* create_columnstore_select_handler_(THD* thd, SELECT_LEX* sel_lex
return handler;
}
if (join->zero_result_cause)
if (join && join->zero_result_cause)
{
if (join->select_lex->have_window_funcs() && join->send_row_on_empty_set())
{
@ -789,7 +794,7 @@ select_handler* create_columnstore_select_handler_(THD* thd, SELECT_LEX* sel_lex
}
}
if ((join->select_lex->options & OPTION_SCHEMA_TABLE) &&
if (join && (join->select_lex->options & OPTION_SCHEMA_TABLE) &&
get_schema_tables_result(join, PROCESSED_BY_JOIN_EXEC))
{
if (!thd->is_error())