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Merge remote-tracking branch 'origin/10.2' into bb-10.2-ext

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This commit is contained in:
Alexander Barkov
2017-05-05 16:12:54 +04:00
parent 583b68e899 db0917f68f
commit ac53b49b1b
398 changed files with 15220 additions and 4380 deletions
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21
sql/sql_cte.h
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@ -45,6 +45,16 @@ private:
table_map work_dep_map; // dependency map used for work
/* Dependency map of with elements mutually recursive with this with element */
table_map mutually_recursive;
/*
Dependency map built only for the top level references i.e. for those that
are encountered in from lists of the selects of the specification unit
*/
table_map top_level_dep_map;
/*
Points to a recursive reference in subqueries.
Used only for specifications without recursive references on the top level.
*/
TABLE_LIST *sq_rec_ref;
/*
The next with element from the circular chain of the with elements
mutually recursive with this with element.
@ -119,11 +129,15 @@ public:
*/
select_union_recursive *rec_result;
/* List of Item_subselects containing recursive references to this CTE */
SQL_I_List<Item_subselect> sq_with_rec_ref;
With_element(LEX_CSTRING *name,
List <LEX_CSTRING> list,
st_select_lex_unit *unit)
: next(NULL), base_dep_map(0), derived_dep_map(0),
sq_dep_map(0), work_dep_map(0), mutually_recursive(0),
top_level_dep_map(0), sq_rec_ref(NULL),
next_mutually_recursive(NULL), references(0),
query_name(name), column_list(list), spec(unit),
is_recursive(false), with_anchor(false),
@ -151,6 +165,8 @@ public:
bool check_dependency_on(With_element *with_elem)
{ return base_dep_map & with_elem->get_elem_map(); }
TABLE_LIST *find_first_sq_rec_ref_in_select(st_select_lex *sel);
bool set_unparsed_spec(THD *thd, char *spec_start, char *spec_end);
st_select_lex_unit *clone_parsed_spec(THD *thd, TABLE_LIST *with_table);
@ -174,11 +190,16 @@ public:
bool contains_sq_with_recursive_reference()
{ return sq_dep_map & mutually_recursive; }
bool no_rec_ref_on_top_level()
{ return !(top_level_dep_map & mutually_recursive); }
table_map get_mutually_recursive() { return mutually_recursive; }
With_element *get_next_mutually_recursive()
{ return next_mutually_recursive; }
TABLE_LIST *get_sq_rec_ref() { return sq_rec_ref; }
bool is_anchor(st_select_lex *sel);
void move_anchors_ahead();