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MDEV-17894 Assertion `(thd->lex)->current_select' failed in MYSQLparse(),

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query with VALUES()

A table value constructor can be used in all contexts where a select
can be used. In particular an ORDER BY clause or a LIMIT clause or both
of them can be attached to a table value constructor to produce a new
query. Unfortunately execution of such queries was not supported.
This patch fixes the problem.
This commit is contained in:
Igor Babaev
2019-05-08 00:08:09 -07:00
parent 9d805004d8
commit 09aa5d3f69
13 changed files with 1339 additions and 47 deletions
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6
sql/sql_lex.h
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@ -800,6 +800,12 @@ public:
table for it
*/
Item_int *intersect_mark;
/**
TRUE if the unit contained TVC at the top level that has been wrapped
into SELECT:
VALUES (v1) ... (vn) => SELECT * FROM (VALUES (v1) ... (vn)) as tvc
*/
bool with_wrapped_tvc;
/**
Pointer to 'last' select, or pointer to select where we stored
global parameters for union.