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Precision Math implementation

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BitKeeper/etc/ignore:
  Added client/decimal.c client/my_decimal.cc client/my_decimal.h to the ignore list
This commit is contained in:
unknown
2005-02-09 02:50:45 +04:00
parent 63bcbfc433
commit 91db48e35a
104 changed files with 9131 additions and 1730 deletions
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25
sql/sql_class.cc
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@@ -1340,6 +1340,9 @@ bool select_max_min_finder_subselect::send_data(List<Item> &items)
case STRING_RESULT:
op= &select_max_min_finder_subselect::cmp_str;
break;
case DECIMAL_RESULT:
op= &select_max_min_finder_subselect::cmp_decimal;
break;
case ROW_RESULT:
// This case should never be choosen
DBUG_ASSERT(0);
@@ -1381,6 +1384,26 @@ bool select_max_min_finder_subselect::cmp_int()
val1 < val2);
}
bool select_max_min_finder_subselect::cmp_decimal()
{
String *val1, *val2, buf1, buf2;
Item *maxmin= ((Item_singlerow_subselect *)item)->el(0);
/*
as far as both operand is Item_cache buf1 & buf2 will not be used,
but added for safety
*/
my_decimal cval, *cvalue= cache->val_decimal(&cval);
my_decimal mval, *mvalue= maxmin->val_decimal(&mval);
if (fmax)
return (cache->null_value && !maxmin->null_value) ||
(!cache->null_value && !maxmin->null_value &&
my_decimal_cmp(cvalue, mvalue) > 0) ;
else
return (maxmin->null_value && !cache->null_value) ||
(!cache->null_value && !maxmin->null_value &&
my_decimal_cmp(cvalue,mvalue) < 0);
}
bool select_max_min_finder_subselect::cmp_str()
{
String *val1, *val2, buf1, buf2;
@@ -1447,6 +1470,8 @@ int select_dumpvar::prepare(List<Item> &list, SELECT_LEX_UNIT *u)
/*
Item_func_set_user_var can't substitute something else on its place =>
0 can be passed as last argument (reference on item)
Item_func_set_user_var can't be fixed after creation, so we do not
check xx->fixed
*/
xx->fix_fields(thd, (TABLE_LIST*) thd->lex->select_lex.table_list.first,
0);