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-rw-r--r--sql/item_strfunc.h9
1 files changed, 7 insertions, 2 deletions
diff --git a/sql/item_strfunc.h b/sql/item_strfunc.h
index 1ae62a4a6e8..36300e57f03 100644
--- a/sql/item_strfunc.h
+++ b/sql/item_strfunc.h
@@ -42,8 +42,13 @@ protected:
we don't want to free and potentially have to reallocate the buffer
for each call.
*/
- str_value.length(0);
- str_value.set_charset(collation.collation);
+ if (!str_value.is_alloced())
+ str_value.set("", 0, collation.collation); /* Avoid null ptrs */
+ else
+ {
+ str_value.length(0); /* Reuse allocated area */
+ str_value.set_charset(collation.collation);
+ }
return &str_value;
}
public: