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-rw-r--r--sql/unireg.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/sql/unireg.h b/sql/unireg.h
index a0890473de8..988be3d398f 100644
--- a/sql/unireg.h
+++ b/sql/unireg.h
@@ -40,6 +40,7 @@
#define ERRMAPP 1 /* Errormap f|r my_error */
#define LIBLEN FN_REFLEN-FN_LEN /* Max l{ngd p} dev */
+#define MAX_DBKEY_LENGTH (FN_LEN*2+2)
#define MAX_FIELD_NAME 34 /* Max colum name length +2 */
#define MAX_KEY 32 /* Max used keys */
#define MAX_REF_PARTS 16 /* Max parts used as ref */