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MDEV-20632: Recursive CTE cycle detection using CYCLE clause (nonstandard)

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Added CYCLE ... RESTRICT (nonstandard) clause to recursive CTE.
This commit is contained in:
Oleksandr Byelkin
2020-01-27 21:50:16 +01:00
parent a5584b13d1
commit 50c0939166
20 changed files with 619 additions and 147 deletions
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2
sql/sql_lex.cc
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@@ -3581,7 +3581,7 @@ void LEX::print(String *str, enum_query_type query_type)
void st_select_lex_unit::print(String *str, enum_query_type query_type)
{
if (with_clause)
with_clause->print(str, query_type);
with_clause->print(thd, str, query_type);
for (SELECT_LEX *sl= first_select(); sl; sl= sl->next_select())
{
if (sl != first_select())