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Merge bk-internal.mysql.com:/home/bk/mysql-5.0

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into  mysql.com:/home/my/mysql-5.0
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monty@mysql.com
2005-08-15 18:35:48 +03:00
parent d0c66bbaa3 4880d22b79
commit 1a6f16edd9
108 changed files with 4317 additions and 2182 deletions
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46
sql/sql_lex.h
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@ -472,14 +472,16 @@ class st_select_lex: public st_select_lex_node
{
public:
Name_resolution_context context;
char *db, *db1, *table1, *db2, *table2; /* For outer join using .. */
char *db;
Item *where, *having; /* WHERE & HAVING clauses */
Item *prep_where; /* saved WHERE clause for prepared statement processing */
/* point on lex in which it was created, used in view subquery detection */
st_lex *parent_lex;
enum olap_type olap;
SQL_LIST table_list, group_list; /* FROM & GROUP BY clauses */
List<Item> item_list; /* list of fields & expressions */
/* FROM clause - points to the beginning of the TABLE_LIST::next_local list. */
SQL_LIST table_list;
SQL_LIST group_list; /* GROUP BY clause. */
List<Item> item_list; /* list of fields & expressions */
List<String> interval_list, use_index, *use_index_ptr,
ignore_index, *ignore_index_ptr;
/*
@ -492,7 +494,12 @@ public:
List<TABLE_LIST> top_join_list; /* join list of the top level */
List<TABLE_LIST> *join_list; /* list for the currently parsed join */
TABLE_LIST *embedding; /* table embedding to the above list */
TABLE_LIST *leaf_tables; /* list of leaves in join table tree */
/*
Beginning of the list of leaves in a FROM clause, where the leaves
inlcude all base tables including view tables. The tables are connected
by TABLE_LIST::next_leaf, so leaf_tables points to the left-most leaf.
*/
TABLE_LIST *leaf_tables;
const char *type; /* type of select for EXPLAIN */
SQL_LIST order_list; /* ORDER clause */
@ -594,7 +601,6 @@ public:
bool init_nested_join(THD *thd);
TABLE_LIST *end_nested_join(THD *thd);
TABLE_LIST *nest_last_join(THD *thd);
void save_names_for_using_list(TABLE_LIST *tab1, TABLE_LIST *tab2);
void add_joined_table(TABLE_LIST *table);
TABLE_LIST *convert_right_join();
List<Item>* get_item_list();
@ -736,6 +742,21 @@ typedef struct st_lex
List<set_var_base> var_list;
List<Item_param> param_list;
List<LEX_STRING> view_list; // view list (list of field names in view)
/*
A stack of name resolution contexts for the query. This stack is used
at parse time to set local name resolution contexts for various parts
of a query. For example, in a JOIN ... ON (some_condition) clause the
Items in 'some_condition' must be resolved only against the operands
of the the join, and not against the whole clause. Similarly, Items in
subqueries should be resolved against the subqueries (and outer queries).
The stack is used in the following way: when the parser detects that
all Items in some clause need a local context, it creates a new context
and pushes it on the stack. All newly created Items always store the
top-most context in the stack. Once the parser leaves the clause that
required a local context, the parser pops the top-most context.
*/
List<Name_resolution_context> context_stack;
SQL_LIST proc_list, auxilliary_table_list, save_list;
create_field *last_field;
udf_func udf;
@ -927,6 +948,21 @@ typedef struct st_lex
return ( query_tables_own_last ? *query_tables_own_last : 0);
}
void cleanup_after_one_table_open();
void push_context(Name_resolution_context *context)
{
context_stack.push_front(context);
}
void pop_context()
{
context_stack.pop();
}
Name_resolution_context *current_context()
{
return context_stack.head();
}
} LEX;
struct st_lex_local: public st_lex