Bug #8663 (cant use bigint as input to CAST)

decimal->ulong conversion fixed to assign max possible ULONG if decimal
is bigger
Item_func_unsigned now handles DECIMAL parameter separately as we can't
rely on decimal::val_int result here.


mysql-test/r/type_newdecimal.result:
  result fixed
mysql-test/t/type_newdecimal.test:
  testcase
sql/item_func.cc:
  DECIMAL_RESULT should be handled separately here as it's
  always signed.
strings/decimal.c:
  here we assign max possible ULONG if the decimal value is bigger

1 files changed, 8 insertions, 1 deletions

diff --git a/sql/item_func.cc b/sql/item_func.cc
index a294bbd7a71..38294d52a5b 100644
--- a/sql/item_func.cc
+++ b/sql/item_func.cc
@@ -964,7 +964,14 @@ longlong Item_func_unsigned::val_int()
   longlong value;
   int error;
 
-  if (args[0]->cast_to_int_type() != STRING_RESULT)
+  if (args[0]->cast_to_int_type() == DECIMAL_RESULT)
+  {
+    my_decimal tmp, *dec= args[0]->val_decimal(&tmp);
+    if (!(null_value= args[0]->null_value))
+      my_decimal2int(E_DEC_FATAL_ERROR, dec, 1, &value);
+    return value;
+  }
+  else if (args[0]->cast_to_int_type() != STRING_RESULT)
   {
     value= args[0]->val_int();
     null_value= args[0]->null_value;