[td-4446]<fix>: fix repeat import caused crash.

src/client/src/tscUtil.c

@@ -3320,7 +3320,11 @@ void doExecuteQuery(SSqlObj* pSql, SQueryInfo* pQueryInfo) {
     tscHandleMasterSTableQuery(pSql);
     tscUnlockByThread(&pSql->squeryLock);
   } else if (TSDB_QUERY_HAS_TYPE(pQueryInfo->type, TSDB_QUERY_TYPE_INSERT)) {
-    tscHandleMultivnodeInsert(pSql);
+    if (TSDB_QUERY_HAS_TYPE(pSql->cmd.insertParam.insertType, TSDB_QUERY_TYPE_FILE_INSERT)) {
+      tscImportDataFromFile(pSql);
+    } else {
+      tscHandleMultivnodeInsert(pSql);
+    }
   } else if (pSql->cmd.command > TSDB_SQL_LOCAL) {
     tscProcessLocalCmd(pSql);
   } else { // send request to server directly

tests/script/general/parser/import_file.sim

@@ -18,6 +18,7 @@ system general/parser/gendata.sh
 sql create table tbx (ts TIMESTAMP, collect_area NCHAR(12), device_id BINARY(16), imsi BINARY(16),  imei BINARY(16),  mdn BINARY(10), net_type BINARY(4), mno NCHAR(4), province NCHAR(10), city NCHAR(16), alarm BINARY(2))
 print ====== create tables success, starting import data
 
+sql import into tbx file '~/data.sql'
 sql import into tbx file '~/data.sql'
 
 sql select count(*) from tbx