change show db to show databases

src/observer/virtual_table/ob_information_user_privileges_table.cpp

@@ -41,7 +41,7 @@ ObInfoSchemaUserPrivilegesTable::StaticInit::StaticInit()
   ObInfoSchemaUserPrivilegesTable::priv_type_strs[OB_PRIV_INDEX_SHIFT] = "INDEX";
   ObInfoSchemaUserPrivilegesTable::priv_type_strs[OB_PRIV_CREATE_VIEW_SHIFT] = "CREATE VIEW";
   ObInfoSchemaUserPrivilegesTable::priv_type_strs[OB_PRIV_SHOW_VIEW_SHIFT] = "SHOW VIEW";
-  ObInfoSchemaUserPrivilegesTable::priv_type_strs[OB_PRIV_SHOW_DB_SHIFT] = "SHOW DB";
+  ObInfoSchemaUserPrivilegesTable::priv_type_strs[OB_PRIV_SHOW_DB_SHIFT] = "SHOW DATABASES";
   ObInfoSchemaUserPrivilegesTable::priv_type_strs[OB_PRIV_SUPER_SHIFT] = "SUPER";
   ObInfoSchemaUserPrivilegesTable::priv_type_strs[OB_PRIV_PROCESS_SHIFT] = "PROCESS";
   ObInfoSchemaUserPrivilegesTable::priv_type_strs[OB_PRIV_CREATE_SYNONYM_SHIFT] = "CREATE SYNONYM";

src/observer/virtual_table/ob_show_grants.cpp

@@ -482,7 +482,7 @@ int ObShowGrants::print_privs_to_buff(
           ret = BUF_PRINTF(" SHOW VIEW,");
         }
         if ((priv_set & OB_PRIV_SHOW_DB) && OB_SUCCESS == ret) {
-          ret = BUF_PRINTF(" SHOW DB,");
+          ret = BUF_PRINTF(" SHOW DATABASES,");
         }
         if ((priv_set & OB_PRIV_SUPER) && OB_SUCCESS == ret) {
           ret = BUF_PRINTF(" SUPER,");

src/share/inner_table/ob_inner_table_schema_def.py

@@ -27406,7 +27406,7 @@ def_table_schema(
                 WHEN V1.C1 = 12
                      AND U.PRIV_SHOW_VIEW = 1 THEN 'SHOW VIEW'
                 WHEN V1.C1 = 13
-                     AND U.PRIV_SHOW_DB = 1 THEN 'SHOW DB'
+                     AND U.PRIV_SHOW_DB = 1 THEN 'SHOW DATABASES'
                 WHEN V1.C1 = 14
                      AND U.PRIV_SUPER = 1 THEN 'SUPER'
                 WHEN V1.C1 = 15

src/share/schema/ob_priv_mgr.cpp

@@ -49,7 +49,7 @@ const char *ObPrivMgr::priv_names_[] = {
     "INDEX",
     "CREATE VIEW",
     "SHOW VIEW",
-    "SHOW DB",
+    "SHOW DATABASES",
     "SUPER",
     "PROCESS",
     "BOOTSTRAP",