Merge pull request #6374 from taosdata/hotfix/TD-4548

[TD-4548]fix tag string quote issue

src/common/src/tvariant.c

@@ -74,7 +74,7 @@ void tVariantCreate(tVariant *pVar, SStrToken *token) {
 
     case TSDB_DATA_TYPE_BINARY: {
       pVar->pz = strndup(token->z, token->n);
-      pVar->nLen = strdequote(pVar->pz);
+      pVar->nLen = strRmquote(pVar->pz, token->n);
       break;
     }
     

src/util/inc/tutil.h

@@ -26,6 +26,7 @@ extern "C" {
 #include "taosdef.h"
 
 int32_t strdequote(char *src);
+int32_t strRmquote(char *z, int32_t len);
 size_t  strtrim(char *src);
 char *  strnchr(char *haystack, char needle, int32_t len, bool skipquote);
 char ** strsplit(char *src, const char *delim, int32_t *num);

src/util/src/tutil.c

@@ -52,6 +52,36 @@ int32_t strdequote(char *z) {
   return j + 1;  // only one quote, do nothing
 }
 
+
+int32_t strRmquote(char *z, int32_t len){  
+    // delete escape character: \\, \', \"
+    char delim = z[0];
+    if (delim != '\'' && delim != '\"') {
+      return len;
+    }
+  
+    int32_t cnt = 0;
+    int32_t j = 0;
+    for (uint32_t k = 1; k < len - 1; ++k) {
+      if (z[k] == '\\' || (z[k] == delim && z[k + 1] == delim)) {
+          z[j] = z[k + 1];
+  
+        cnt++;
+        j++;
+        k++;
+        continue;
+      }
+  
+      z[j] = z[k];
+      j++;
+    }
+  
+    z[j] = 0;
+    
+    return len - 2 - cnt;
+}
+
+
 size_t strtrim(char *z) {
   int32_t i = 0;
   int32_t j = 0;