fix(shell): add help command and fixed fields auto fill

src/kit/shell/inc/shellAuto.h

@@ -33,5 +33,7 @@ void shellAutoExit();
 // callback autotab module
 void callbackAutoTab(char* sqlstr, TAOS* pSql, bool usedb);
 
+// show all commands help
+void showHelp();
 
 #endif

src/kit/shell/src/shellAuto.c

@@ -1438,25 +1438,37 @@ bool matchSelectQuery(TAOS * con, Command * cmd) {
 }
 
 // if is input create fields or tags area, return true
-bool isCreateFieldsArea(char * p) {
-  char * left  = strrchr(p, '(');
+bool isCreateFieldsArea(char* p) {
+  // put to while, support like create table st(ts timestamp, bin1 binary(16), bin2 + blank + TAB
+  char* p1 = strdup(p);
+  bool  ret = false;
+  while (1) {
+    char* left = strrchr(p1, '(');
     if (left == NULL) {
       // like 'create table st'
-    return false;
+      ret = false;
+      break;
     }
 
-  char * right = strrchr(p, ')');
-  if(right == NULL) {
+    char* right = strrchr(p1, ')');
+    if (right == NULL) {
       // like 'create table st( '
-    return true;
+      ret = true;
+      break;
     }
 
     if (left > right) {
       // like 'create table st( ts timestamp, age int) tags(area '
-    return true;
+      ret = true;
+      break;
     }
 
-  return false;
+    // set string end by small for next strrchr search
+    *left = 0;
+  }
+  taosMemoryFree(p1);
+
+  return ret;
 }
 
 bool matchCreateTable(TAOS * con, Command * cmd) {

src/kit/shell/src/shellEngine.c

@@ -216,6 +216,12 @@ int32_t shellRunCommand(TAOS* con, char* command) {
     return 0;
   }
 
+  // add help or help;
+  if (strcmp(command, "help") == 0 || strcmp(command, "help;") == 0) {
+    showHelp();
+    return 0;
+  }
+
   /* Update the history vector. */
   if (history.hstart == history.hend ||
       history.hist[(history.hend + MAX_HISTORY_SIZE - 1) % MAX_HISTORY_SIZE] == NULL ||