[TD-12252]<feature>(connector,query,insert,other,tools,taosAdapter):deal with escape character

src/client/src/tscUtil.c

@@ -2918,7 +2918,7 @@ void tscColumnListDestroy(SArray* pColumnList) {
  *
  */
 static int32_t validateQuoteToken(SStrToken* pToken, bool escapeEnabled, bool *dbIncluded) {
-  pToken->n = stringProcess(pToken->z, pToken->n);
+  if(pToken->z != TS_BACKQUOTE_CHAR) pToken->n = stringProcess(pToken->z, pToken->n);
 
   int32_t k = tGetToken(pToken->z, &pToken->type);
 
@@ -2957,7 +2957,7 @@ int32_t tscValidateName(SStrToken* pToken, bool escapeEnabled, bool *dbIncluded)
 
     if (pToken->type == TK_STRING) {
 
-      pToken->n = stringProcess(pToken->z, pToken->n);
+      if(pToken->z[0] != TS_BACKQUOTE_CHAR) pToken->n = stringProcess(pToken->z, pToken->n);
       // tscStrToLower(pToken->z, pToken->n);
       strntolower(pToken->z, pToken->z, pToken->n);
       //pToken->n = (uint32_t)strtrim(pToken->z);
@@ -2977,7 +2977,7 @@ int32_t tscValidateName(SStrToken* pToken, bool escapeEnabled, bool *dbIncluded)
         return tscValidateName(pToken, escapeEnabled, NULL);
       }
     } else if (pToken->type == TK_ID) {
-      pToken->n = stringProcess(pToken->z, pToken->n);
+      if(pToken->z[0] == TS_BACKQUOTE_CHAR) pToken->n = stringProcess(pToken->z, pToken->n);
 
       if (pToken->n == 0) {
         return TSDB_CODE_TSC_INVALID_OPERATION;
@@ -3038,7 +3038,7 @@ int32_t tscValidateName(SStrToken* pToken, bool escapeEnabled, bool *dbIncluded)
     }
 
     if (escapeEnabled && pToken->type == TK_ID) {
-      pToken->n = stringProcess(pToken->z, pToken->n);
+      if(pToken->z[0] == TS_BACKQUOTE_CHAR) pToken->n = stringProcess(pToken->z, pToken->n);
     }
 
     // re-build the whole name string

src/util/src/tutil.c

@@ -141,7 +141,6 @@ size_t strtrim(char *z) {
   } else if (j != i) {
     z[i] = 0;
   }
-  
   return i;
 }
 
@@ -197,7 +196,7 @@ char *tstrstr(char *src, char *dst, bool ignoreInEsc) {
   bool inEsc = false;
   char escChar = 0;
   char *str = src, *res = NULL;
-  
+
   for (int32_t i = 0; i < len; ++i) {
     if (src[i] == TS_BACKQUOTE_CHAR || src[i] == '\'' || src[i] == '\"') {
       if (!inEsc) {
@@ -216,7 +215,7 @@ char *tstrstr(char *src, char *dst, bool ignoreInEsc) {
 
         str = src + i + 1;
       }
-      
+
       inEsc = !inEsc;
       continue;
     }