feat: support sql command show vnodes for all dnodes

source/libs/parser/inc/sql.y

@@ -476,7 +476,7 @@ cmd ::= SHOW TAGS FROM db_name(B) NK_DOT table_name(A).
 cmd ::= SHOW TABLE TAGS tag_list_opt(C) FROM table_name_cond(A) from_db_opt(B).   { pCxt->pRootNode = createShowTableTagsStmt(pCxt, A, B, C); }
 cmd ::= SHOW TABLE TAGS tag_list_opt(C) FROM db_name(B) NK_DOT table_name(A).     { pCxt->pRootNode = createShowTableTagsStmt(pCxt, createIdentifierValueNode(pCxt, &A), createIdentifierValueNode(pCxt, &B), C); }
 cmd ::= SHOW VNODES ON DNODE NK_INTEGER(A).                                       { pCxt->pRootNode = createShowVnodesStmt(pCxt, createValueNode(pCxt, TSDB_DATA_TYPE_BIGINT, &A), NULL); }
-cmd ::= SHOW VNODES ON DNODE NK_STRING(A).                                        { pCxt->pRootNode = createShowVnodesStmt(pCxt, NULL, createValueNode(pCxt, TSDB_DATA_TYPE_VARCHAR, &A)); }
+cmd ::= SHOW VNODES.                                                              { pCxt->pRootNode = createShowVnodesStmt(pCxt, NULL, NULL); }
 // show alive
 cmd ::= SHOW db_name_cond_opt(A) ALIVE.                                           { pCxt->pRootNode = createShowAliveStmt(pCxt, A,    QUERY_NODE_SHOW_DB_ALIVE_STMT); }
 cmd ::= SHOW CLUSTER ALIVE.                                                       { pCxt->pRootNode = createShowAliveStmt(pCxt, NULL, QUERY_NODE_SHOW_CLUSTER_ALIVE_STMT); }

source/libs/parser/src/parTranslater.c

@@ -8054,8 +8054,6 @@ static int32_t rewriteShowVnodes(STranslateContext* pCxt, SQuery* pQuery) {
   if (TSDB_CODE_SUCCESS == code) {
     if (NULL != pShow->pDnodeId) {
       code = createOperatorNode(OP_TYPE_EQUAL, "dnode_id", pShow->pDnodeId, &pStmt->pWhere);
-    } else {
-      code = createOperatorNode(OP_TYPE_EQUAL, "dnode_ep", pShow->pDnodeEndpoint, &pStmt->pWhere);
     }
   }
   if (TSDB_CODE_SUCCESS == code) {