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UNIONs : further work

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Sinisa@sinisa.nasamreza.org 2001-07-22 13:25:56 +03:00
parent 8060b31aba
commit f0a6416b07
4 changed files with 42 additions and 32 deletions
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2
sql/sql_lex.h
View file

@ -180,7 +180,7 @@ typedef struct st_lex {
enum enum_ha_read_modes ha_read_mode;
enum ha_rkey_function ha_rkey_mode;
enum enum_enable_or_disable alter_keys_onoff;
uint grant,grant_tot_col,which_columns;
uint grant,grant_tot_col,which_columns, union_option;
thr_lock_type lock_option;
bool drop_primary,drop_if_exists,local_file;
bool in_comment,ignore_space,verbose,simple_alter, option_type;

8
sql/sql_parse.cc
View file

@ -1761,7 +1761,9 @@ mysql_execute_command(void)
for (TABLE_LIST *cursor=(TABLE_LIST *)sl->table_list.first;cursor;cursor=cursor->next)
cursor->table= ((TABLE_LIST*) cursor->table)->table;
}
ha_rows save_it=thd->offset_limit; thd->offset_limit=0;
res=mysql_union(thd,lex, select_lex->select_number+1);
thd->offset_limit=save_it;
}
close_thread_tables(thd);
break;
@ -2440,9 +2442,9 @@ mysql_init_select(LEX *lex)
SELECT_LEX *select_lex = lex->select;
select_lex->where=select_lex->having=0;
select_lex->select_limit=current_thd->default_select_limit;
select_lex->offset_limit=0L;
select_lex->offset_limit=0;
select_lex->options=0; select_lex->linkage=UNSPECIFIED_TYPE;
select_lex->select_number = 0; lex->exchange = 0;
select_lex->select_number = 0; lex->exchange = 0; lex->union_option=0;
lex->proc_list.first=0;
select_lex->order_list.elements=select_lex->group_list.elements=0;
select_lex->order_list.first=0;
@ -2938,6 +2940,8 @@ static int link_in_large_list_and_check_acl(THD *thd,LEX *lex,SQL_LIST *tables)
aux->table=(TABLE *)ptr;
link_in_list(tables,(byte*)ptr,(byte**) &ptr->next);
}
else
aux->table=(TABLE *)cursor;
}
}
}

12
sql/sql_unions.cc
View file

@ -72,10 +72,10 @@ int mysql_union(THD *thd,LEX *lex,uint no_of_selects)
return res;
}
table=create_result->table;
List_iterator<Item> it(*(create_result->fields));
/* List_iterator<Item> it(*(create_result->fields));
Item *item;
while ((item= it++))
fields.push_back(item);
fields.push_back(item);*/
if (!(resulting = (TABLE_LIST *) thd->calloc(sizeof(TABLE_LIST))))
return 1;
resulting->db=tables->db ? tables->db : thd->db;
@ -88,8 +88,8 @@ int mysql_union(THD *thd,LEX *lex,uint no_of_selects)
}
else // Then we do INSERT from SELECT
{
select_result *result;
if ((result=new select_insert(table, &fields, DUP_IGNORE, true)))
select_insert *result;
if ((result=new select_insert(table, create_result->fields, DUP_IGNORE, true)))
{
res=mysql_select(thd,tables,sl->item_list,
sl->where,
@ -104,7 +104,7 @@ int mysql_union(THD *thd,LEX *lex,uint no_of_selects)
if (res)
{
delete create_result;
return 1;
return res;
}
}
else
@ -142,6 +142,8 @@ int mysql_union(THD *thd,LEX *lex,uint no_of_selects)
result->abort();
delete result;
}
else
res=-1;
delete create_result;
return res;
}

8
sql/sql_yacc.yy
View file

@ -551,7 +551,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize);
table_to_table_list table_to_table opt_table_list opt_as
handler_rkey_function handler_rkey_mode handler_read_or_scan
single_multi table_wild_list table_wild_one opt_wild union union_list
precision
precision union_option
END_OF_INPUT
%type <NONE>
@ -3404,7 +3404,7 @@ union:
| union_list
union_list:
UNION_SYM
UNION_SYM union_option
{
LEX *lex=Lex;
if (lex->exchange) YYABORT; /* Only the last SELECT can have INTO...... */
@ -3412,3 +3412,7 @@ union_list:
mysql_new_select(lex); lex->select->linkage=UNION_TYPE;
}
select
union_option:
/* empty */ {}
| ALL {Lex->union_option=1;}