do not include table name in MySQL indexes.

src/libmdb/backend.c

@@ -483,6 +483,48 @@ int mdb_set_default_backend(MdbHandle *mdb, const char *backend_name)
 	}
 }
 
+
+/**
+ * Generates index name based on backend.
+ *
+ * You should free() the returned value once you are done with it.
+ *
+ * @param backend backend we are generating indexes for
+ * @param table table being processed
+ * @param idx index being processed
+ * @return the index name
+ */
+static char *
+mdb_get_index_name(int backend, MdbTableDef *table, MdbIndex *idx)
+{
+	char *index_name;
+
+	switch(backend){
+		case MDB_BACKEND_MYSQL:
+			// appending table name to index often makes it too long for mysql
+			index_name = malloc(strlen(idx->name)+5+1);
+			if (idx->index_type==1)
+				// for mysql name of primary key is not used
+				strcpy(index_name, "_pkey");
+			else {
+				strcpy(index_name, idx->name);
+			}
+			break;
+		default:
+			index_name = malloc(strlen(table->name)+strlen(idx->name)+5+1);
+			strcpy(index_name, table->name);
+			if (idx->index_type==1)
+				strcat(index_name, "_pkey");
+			else {
+				strcat(index_name, "_");
+				strcat(index_name, idx->name);
+				strcat(index_name, "_idx");
+			}
+	}
+
+	return index_name;
+}
+
 /**
  * mdb_print_indexes
  * @output: Where to print the sql
@@ -525,15 +567,7 @@ mdb_print_indexes(FILE* outfile, MdbTableDef *table, char *dbnamespace)
 		if (idx->index_type==2)
 			continue;
 
-		index_name = malloc(strlen(table->name)+strlen(idx->name)+5+1);
+		index_name = mdb_get_index_name(backend, table, idx);
-		strcpy(index_name, table->name);
-		if (idx->index_type==1)
-			strcat(index_name, "_pkey");
-		else {
-			strcat(index_name, "_");
-			strcat(index_name, idx->name);
-			strcat(index_name, "_idx");
-		}
 		quoted_name = mdb->default_backend->quote_schema_name(dbnamespace, index_name);
 		if (idx->index_type==1) {
 			switch (backend) {