Bug#17226: Variable set in cursor on first iteration is assigned

           second iterations value

During assignment to the BLOB variable in routine body the value
wasn't copied.


mysql-test/r/sp-vars.result:
  Add result for bug#17226.
mysql-test/t/sp-vars.test:
  Add test case for bug#17226.
sql/field_conv.cc:
  Honor copy_blobs flag.

1 files changed, 8 insertions, 3 deletions

diff --git a/sql/field_conv.cc b/sql/field_conv.cc
index 4e977c06180..3200f2ca9b2 100644
--- a/sql/field_conv.cc
+++ b/sql/field_conv.cc
@@ -675,9 +675,14 @@ void field_conv(Field *to,Field *from)
   {						// Be sure the value is stored
     Field_blob *blob=(Field_blob*) to;
     from->val_str(&blob->value);
-    if (!blob->value.is_alloced() &&
-	from->real_type() != MYSQL_TYPE_STRING &&
-        from->real_type() != MYSQL_TYPE_VARCHAR)
+    /*
+      Copy value if copy_blobs is set, or source is not a string and
+      we have a pointer to its internal string conversion buffer.
+    */
+    if (to->table->copy_blobs ||
+        (!blob->value.is_alloced() &&
+         from->real_type() != MYSQL_TYPE_STRING &&
+         from->real_type() != MYSQL_TYPE_VARCHAR))
       blob->value.copy();
     blob->store(blob->value.ptr(),blob->value.length(),from->charset());
     return;