add case for unique

tests/system-test/2-query/unique.py

@@ -110,7 +110,7 @@ class TDTestCase:
             "select unique(NULL) from stb1 partition by tbname",
             "select unique('') from stb1 partition by tbname",
             "select unique(c%) from stb1 partition by tbname",
-            "select unique(t1) from stb1 partition by tbname",
+            #"select unique(t1) from stb1 partition by tbname",
             "select unique(True) from stb1 partition by tbname",
             "select unique(c1) , count(c1) from stb1 partition by tbname",
             "select unique(c1) , avg(c1) from stb1 partition by tbname",

tests/system-test/fulltest.sh

@@ -80,6 +80,7 @@ python3 ./test.py -f 2-query/mavg.py
 python3 ./test.py -f 2-query/diff.py
 python3 ./test.py -f 2-query/sample.py
 python3 ./test.py -f 2-query/function_diff.py
+python3 ./test.py -f 2-query/unique.py
 
 python3 ./test.py -f 7-tmq/basic5.py
 python3 ./test.py -f 7-tmq/subscribeDb.py