SQL: respect signed in set_max(), is_max()

78c5d1d7 · Aleksey Midenkov · a7225935 · 78c5d1d7
Commit 78c5d1d7 authored Oct 03, 2016 by Aleksey Midenkov
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Showing with 10 additions and 4 deletions

sql/field.cc sql/field.cc +10 -4

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--- a/sql/field.cc
+++ b/sql/field.cc
@@ -4359,16 +4359,22 @@ void Field_longlong::sql_type(String &res) const
 bool Field_longlong::set_max()
 {
  ASSERT_COLUMN_MARKED_FOR_WRITE_OR_COMPUTED;
-  int8store(ptr, ULONGLONG_MAX);
+  int8store(ptr, unsigned_flag ? ULONGLONG_MAX : LONGLONG_MAX);
  return FALSE;
 }
 bool Field_longlong::is_max()
 {
  ASSERT_COLUMN_MARKED_FOR_READ;
-  ulonglong j;
+  if (unsigned_flag)
-  j = sint8korr(ptr);
+  {
-  return j == ULONGLONG_MAX;
+    ulonglong j;
+    j= uint8korr(ptr);
+    return j == ULONGLONG_MAX;
+  }
+  longlong j;
+  j= sint8korr(ptr);
+  return j == LONGLONG_MAX;
 }
 /*