feat: sql command 'insert ... select'

source/libs/parser/src/parInsert.c

@@ -110,7 +110,7 @@ typedef struct SMemParam {
 static int32_t skipInsertInto(char** pSql, SMsgBuf* pMsg) {
   SToken sToken;
   NEXT_TOKEN(*pSql, sToken);
-  if (TK_INSERT != sToken.type) {
+  if (TK_INSERT != sToken.type && TK_IMPORT != sToken.type) {
     return buildSyntaxErrMsg(pMsg, "keyword INSERT is expected", sToken.z);
   }
   NEXT_TOKEN(*pSql, sToken);

source/libs/parser/src/parser.c

@@ -34,6 +34,7 @@ bool qIsInsertValuesSql(const char* pStr, size_t length) {
 
   do {
     pStr += index;
+    index = 0;
     t = tStrGetToken((char*)pStr, &index, false);
     if (TK_USING == t.type || TK_VALUES == t.type) {
       return true;