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Fixed MDEV-14883 Usage of EXCEPT and INTERSECT in recursive CTE

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is not supported

Allowed to use recursive references in derived tables.
As a result usage of recursive references in operands of
INTERSECT / EXCEPT is now supported.
This commit is contained in:
Igor Babaev
2018-02-22 10:08:49 -08:00
parent 988ec800ed
commit 907b236112
9 changed files with 464 additions and 22 deletions
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3
sql/sql_select.cc
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@ -12500,7 +12500,8 @@ bool JOIN_TAB::preread_init()
derived, DT_CREATE | DT_FILL))
return TRUE;
if (!(derived->get_unit()->uncacheable & UNCACHEABLE_DEPENDENT))
if (!(derived->get_unit()->uncacheable & UNCACHEABLE_DEPENDENT) ||
derived->is_nonrecursive_derived_with_rec_ref())
preread_init_done= TRUE;
if (select && select->quick)
select->quick->replace_handler(table->file);