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-rw-r--r--sql/multi_range_read.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/sql/multi_range_read.cc b/sql/multi_range_read.cc
index e6cbed7eb13..b6133eac3ae 100644
--- a/sql/multi_range_read.cc
+++ b/sql/multi_range_read.cc
@@ -1648,7 +1648,7 @@ int DsMrr_impl::dsmrr_explain_info(uint mrr_mode, char *str, size_t size)
uint used_str_len= strlen(used_str);
uint copy_len= min(used_str_len, size);
- memcpy(str, used_str, size);
+ memcpy(str, used_str, copy_len);
return copy_len;
}
return 0;