Merge pull request #14649 from taosdata/fix/TS-1664-V26

fix: table name which is a key word led to a crash

src/client/src/tscUtil.c

@@ -3014,6 +3014,10 @@ int32_t tscValidateName(SStrToken* pToken, bool escapeEnabled, bool *dbIncluded)
 
       // single token, validate it
       if (len == pToken->n) {
+        if (taosIsKeyWordToken(pToken->z, (int32_t) pToken->n)) {
+          return TSDB_CODE_TSC_INVALID_OPERATION;
+        }
+
         return validateQuoteToken(pToken, escapeEnabled, NULL);
       } else {
         sep = strnchr(pToken->z, TS_PATH_DELIMITER[0], pToken->n, true);

tests/pytest/query/queryBase.py

@@ -171,6 +171,11 @@ class TDTestCase:
         tdSql.waitedQuery(sql, 1, WAITS)
         tdSql.checkData(0, 1, 229400)
 
+        # TS-1664
+        tdSql.error("create database string")
+        tdSql.error("create table string(ts timestamp, c1 int)")
+        tdSql.error("select * from string")
+
 #
 # add case with filename
 #