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Fixed mdev-14852 Fails to reopen temp table within standard CTE

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If the specification of a CTE contains a reference to a temporary table
then THD::open_temporary_table() must be called for this reference for
any occurrence of the CTE in the query. By mistake this was done only
for the first occurrences of CTEs.
The patch fixes this problem in With_element::clone_parsed_spec().
It also moves there the call of check_dependencies_in_with_clauses()
to its proper place before the call of check_table_access().
Additionally the patch optimizes the number of calls of the
function check_dependencies_in_with_clauses().
This commit is contained in:
Igor Babaev 2018-01-04 23:40:37 -08:00
commit 0de565a564
5 changed files with 74 additions and 25 deletions
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7
sql/sql_cte.cc
View file

@ -817,12 +817,19 @@ st_select_lex_unit *With_element::clone_parsed_spec(THD *thd,
parse_status= parse_sql(thd, &parser_state, 0);
if (parse_status)
goto err;
if (check_dependencies_in_with_clauses(lex->with_clauses_list))
goto err;
spec_tables= lex->query_tables;
spec_tables_tail= 0;
for (TABLE_LIST *tbl= spec_tables;
tbl;
tbl= tbl->next_global)
{
if (!tbl->derived && !tbl->schema_table &&
thd->open_temporary_table(tbl))
goto err;
spec_tables_tail= tbl;
}
if (check_table_access(thd, SELECT_ACL, spec_tables, FALSE, UINT_MAX, FALSE))