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EXPLAIN UNION using same routing which used for execution which allow return correct bug messages (Bug #3639)

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EXPLAIN of hidden SELECT of UNION
This commit is contained in:
bell@sanja.is.com.ua
2004-05-06 20:40:21 +03:00
parent ec33d794d8
commit 3aae50e8c0
11 changed files with 179 additions and 74 deletions
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3
sql/sql_lex.h
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@ -336,6 +336,7 @@ public:
st_select_lex *fake_select_lex;
st_select_lex *union_distinct; /* pointer to the last UNION DISTINCT */
bool describe; /* union exec() called for EXPLAIN */
void init_query();
bool create_total_list(THD *thd, st_lex *lex, TABLE_LIST **result);
@ -413,7 +414,7 @@ public:
ulong table_join_options;
uint in_sum_expr;
uint select_number; /* number of select (used for EXPLAIN) */
int select_number; /* number of select (used for EXPLAIN) */
uint with_wild; /* item list contain '*' */
bool braces; /* SELECT ... UNION (SELECT ... ) <- this braces */
/* TRUE when having fix field called in processing of this SELECT */