From 98f4d0c0dde9b3b6b4f249b301b0689b895b62dd Mon Sep 17 00:00:00 2001
From: Ganlin Zhao <ganlinzhao@hotmail.com>
Date: Thu, 11 Aug 2022 13:57:23 +0800
Subject: [PATCH 1/3] test: add interp test cases

---
 tests/system-test/2-query/sample.py | 32 ++++++++++++++---------------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/tests/system-test/2-query/sample.py b/tests/system-test/2-query/sample.py
index f09265c300..cb74c33d92 100644
--- a/tests/system-test/2-query/sample.py
+++ b/tests/system-test/2-query/sample.py
@@ -335,7 +335,7 @@ class TDTestCase:
         # case11 = {"alias": ", st1"}
         # self.checksample(**case11)
         tdSql.query("select sample( c1 , 1 ) , st1 from t1")
-        
+
         # case12 = {"alias": ", c1"}
         # self.checksample(**case12)
 
@@ -497,7 +497,7 @@ class TDTestCase:
         # tdSql.query(" select sample(c1 , 1) + 2 from t1 ")
         err41 = {"alias": "+ avg(c1)"}
         # self.checksample(**err41)         # mix with arithmetic 2
-        
+
         # err42 = {"alias": ", c1"}
         # self.checksample(**err42)
         tdSql.query("select sample( c1 , 1 ) , c1 from t1")
@@ -605,14 +605,14 @@ class TDTestCase:
             tdSql.execute(f"create table tt{i} using stb2 tags({i})")
 
         pass
-    
+
 
     def check_sample(self , sample_query , origin_query ):
 
         tdSql.query(origin_query)
 
         origin_datas = tdSql.queryResult
-        
+
         tdSql.query(sample_query)
 
         sample_datas = tdSql.queryResult
@@ -620,7 +620,7 @@ class TDTestCase:
         for ind , sample_data in enumerate(sample_datas):
             if sample_data not in origin_datas:
                 status = False
-        
+
         if status:
             tdLog.info(" sample data is in datas groups ,successed sql is :  %s" % sample_query )
         else:
@@ -637,7 +637,7 @@ class TDTestCase:
             tags (t1 int)
             '''
         )
-        
+
         tdSql.execute(
             '''
             create table t1
@@ -689,7 +689,7 @@ class TDTestCase:
         tdSql.error(" select sample(c1,ts) from t1 ")
         tdSql.error(" select sample(c1,false) from t1 ")
         tdSql.query(" select sample(123,1) from t1 ")
-        
+
         tdSql.query(" select sample(c1,2) from t1 ")
         tdSql.checkRows(2)
         tdSql.query(" select sample(c1,10) from t1 ")
@@ -704,10 +704,10 @@ class TDTestCase:
         tdSql.checkRows(9)
         tdSql.error(" select sample(c1,-1) from t1  ")
 
-        # bug need fix 
+        # bug need fix
         # tdSql.query("select sample(c1 ,2) , 123 from stb1;")
 
-        # all type support 
+        # all type support
         tdSql.query(" select sample(c1 , 20 ) from ct4 ")
         tdSql.checkRows(9)
 
@@ -761,7 +761,7 @@ class TDTestCase:
 
         self.check_sample("select sample( c1 ,3 )  from t1 where c1 between 1 and 10" ,"select c1  from t1 where c1 between 1 and 10")
 
-        # join 
+        # join
 
         tdSql.query("select sample( ct4.c1 , 1 )  from ct1, ct4 where ct4.ts=ct1.ts")
 
@@ -772,22 +772,22 @@ class TDTestCase:
 
         self.check_sample("select sample(c1,2) from stb1 partition by tbname" , "select c1 from stb1 partition by tbname")
 
-        # nest query 
+        # nest query
         # tdSql.query("select sample(c1,2) from (select c1 from t1); ")
         # tdSql.checkRows(2)
 
-        # union all 
+        # union all
         tdSql.query("select sample(c1,2) from t1 union all select sample(c1,3) from t1")
         tdSql.checkRows(5)
 
         # fill interval
 
-        # not support mix with other function 
+        # not support mix with other function
         tdSql.error("select top(c1,2) , sample(c1,2) from ct1")
         tdSql.error("select max(c1) , sample(c1,2) from ct1")
         tdSql.query("select c1 , sample(c1,2) from ct1")
 
-        # bug for mix with scalar 
+        # bug for mix with scalar
         tdSql.query("select 123 , sample(c1,100) from ct1")
         tdSql.query("select sample(c1,100)+2 from ct1")
         tdSql.query("select abs(sample(c1,100)) from ct1")
@@ -864,13 +864,13 @@ class TDTestCase:
         for i in range(2000):
             ts = self.ts+i*10
             tdSql.execute(f"insert into sub_tb values({ts} ,{i})")
-        
+
         tdSql.query("select count(*) from st")
         tdSql.checkData(0,0,2000)
         tdSql.query("select sample(c1 ,1000) from st")
         tdSql.checkRows(1000)
 
-        # bug need fix 
+        # bug need fix
         tdSql.query("select c1 ,t1, sample(c1,2) from db.stb1 partition by c1 ")
         tdSql.query("select sample(c1,2) from db.stb1 partition by c1 ")
         # tdSql.query("select c1 ,ind, sample(c1,2) from sample_db.st partition by c1 ")

From a270c989d2e51861a2c25def7776b009c246f21c Mon Sep 17 00:00:00 2001
From: Ganlin Zhao <ganlinzhao@hotmail.com>
Date: Thu, 11 Aug 2022 13:57:23 +0800
Subject: [PATCH 2/3] test: add interp test cases

---
 tests/system-test/fulltest.sh | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tests/system-test/fulltest.sh b/tests/system-test/fulltest.sh
index 7941e76df6..cdc0085cbc 100755
--- a/tests/system-test/fulltest.sh
+++ b/tests/system-test/fulltest.sh
@@ -96,6 +96,8 @@ python3 ./test.py -f 2-query/distribute_agg_stddev.py
 python3 ./test.py -f 2-query/distribute_agg_stddev.py -R
 python3 ./test.py -f 2-query/distribute_agg_sum.py
 python3 ./test.py -f 2-query/distribute_agg_sum.py -R
+python3 ./test.py -f 2-query/interp.py
+python3 ./test.py -f 2-query/interp.py -R
 
 
 
@@ -338,6 +340,7 @@ python3 ./test.py -f 2-query/arcsin.py -Q 2
 python3 ./test.py -f 2-query/arccos.py -Q 2
 python3 ./test.py -f 2-query/arctan.py -Q 2
 python3 ./test.py -f 2-query/query_cols_tags_and_or.py  -Q 2
+python3 ./test.py -f 2-query/interp.py  -Q 2
 
 # python3 ./test.py -f 2-query/nestedQuery.py  -Q 2
 # python3 ./test.py -f 2-query/nestedQuery_str.py  -Q 2
@@ -457,3 +460,4 @@ python3 ./test.py -f 2-query/max_partition.py -Q 3
 python3 ./test.py -f 2-query/last_row.py -Q 3
 python3 ./test.py -f 2-query/tsbsQuery.py -Q 3
 python3 ./test.py -f 2-query/sml.py -Q 3
+python3 ./test.py -f 2-query/interp.py -Q 3

From 67eb7ec4080c8cbf0cb309407017b4657279615c Mon Sep 17 00:00:00 2001
From: Ganlin Zhao <ganlinzhao@hotmail.com>
Date: Thu, 11 Aug 2022 13:57:23 +0800
Subject: [PATCH 3/3] test: add interp test cases

---
 tests/system-test/2-query/interp.py | 559 ++++++++++++++++++++++++++++
 1 file changed, 559 insertions(+)
 create mode 100644 tests/system-test/2-query/interp.py

diff --git a/tests/system-test/2-query/interp.py b/tests/system-test/2-query/interp.py
new file mode 100644
index 0000000000..9348a8ca8f
--- /dev/null
+++ b/tests/system-test/2-query/interp.py
@@ -0,0 +1,559 @@
+import taos
+import sys
+
+from util.log import *
+from util.sql import *
+from util.cases import *
+
+
+
+class TDTestCase:
+
+    def init(self, conn, logSql):
+        tdLog.debug(f"start to excute {__file__}")
+        tdSql.init(conn.cursor())
+
+    def run(self):
+        dbname = "db"
+        tbname = "tb"
+
+        tdSql.prepare()
+
+        tdLog.printNoPrefix("==========step1:create table")
+
+        tdSql.execute(
+            f'''create table if not exists {dbname}.{tbname}
+            (ts timestamp, c0 tinyint, c1 smallint, c2 int, c3 bigint, c4 double, c5 float, c6 bool, c7 varchar(10), c8 nchar(10))
+            '''
+        )
+
+        tdLog.printNoPrefix("==========step2:insert data")
+
+        tdSql.execute(f"insert into {dbname}.{tbname} values ('2020-02-01 00:00:05', 5, 5, 5, 5, 5.0, 5.0, true, 'varchar', 'nchar')")
+        tdSql.execute(f"insert into {dbname}.{tbname} values ('2020-02-01 00:00:10', 10, 10, 10, 10, 10.0, 10.0, true, 'varchar', 'nchar')")
+        tdSql.execute(f"insert into {dbname}.{tbname} values ('2020-02-01 00:00:15', 15, 15, 15, 15, 15.0, 15.0, true, 'varchar', 'nchar')")
+
+        tdLog.printNoPrefix("==========step3:fill null")
+
+        ## {. . .}
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:04', '2020-02-01 00:00:16') every(1s) fill(null)")
+        tdSql.checkRows(13)
+        tdSql.checkData(0, 0, None)
+        tdSql.checkData(1, 0, 5)
+        tdSql.checkData(2, 0, None)
+        tdSql.checkData(3, 0, None)
+        tdSql.checkData(4, 0, None)
+        tdSql.checkData(5, 0, None)
+        tdSql.checkData(6, 0, 10)
+        tdSql.checkData(7, 0, None)
+        tdSql.checkData(8, 0, None)
+        tdSql.checkData(9, 0, None)
+        tdSql.checkData(10, 0, None)
+        tdSql.checkData(11, 0, 15)
+        tdSql.checkData(12, 0, None)
+
+        ## {} ...
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:01', '2020-02-01 00:00:04') every(1s) fill(null)")
+        tdSql.checkRows(4)
+        tdSql.checkData(0, 0, None)
+        tdSql.checkData(1, 0, None)
+        tdSql.checkData(2, 0, None)
+        tdSql.checkData(3, 0, None)
+
+        ## {.}..
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:03', '2020-02-01 00:00:07') every(1s) fill(null)")
+        tdSql.checkRows(5)
+        tdSql.checkData(0, 0, None)
+        tdSql.checkData(1, 0, None)
+        tdSql.checkData(2, 0, 5)
+        tdSql.checkData(3, 0, None)
+        tdSql.checkData(4, 0, None)
+
+        ## .{}..
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:06', '2020-02-01 00:00:09') every(1s) fill(null)")
+        tdSql.checkRows(4)
+        tdSql.checkData(0, 0, None)
+        tdSql.checkData(1, 0, None)
+        tdSql.checkData(2, 0, None)
+        tdSql.checkData(3, 0, None)
+
+        ## .{.}.
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:08', '2020-02-01 00:00:12') every(1s) fill(null)")
+        tdSql.checkRows(5)
+        tdSql.checkData(0, 0, None)
+        tdSql.checkData(1, 0, None)
+        tdSql.checkData(2, 0, 10)
+        tdSql.checkData(3, 0, None)
+        tdSql.checkData(4, 0, None)
+
+        ## ..{.}
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:13', '2020-02-01 00:00:17') every(1s) fill(null)")
+        tdSql.checkRows(5)
+        tdSql.checkData(0, 0, None)
+        tdSql.checkData(1, 0, None)
+        tdSql.checkData(2, 0, 15)
+        tdSql.checkData(3, 0, None)
+        tdSql.checkData(4, 0, None)
+
+        ## ... {}
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:16', '2020-02-01 00:00:19') every(1s) fill(null)")
+        tdSql.checkRows(4)
+        tdSql.checkData(0, 0, None)
+        tdSql.checkData(1, 0, None)
+        tdSql.checkData(2, 0, None)
+        tdSql.checkData(3, 0, None)
+
+        tdLog.printNoPrefix("==========step4:fill value")
+
+        ## {. . .}
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:04', '2020-02-01 00:00:16') every(1s) fill(value, 1)")
+        tdSql.checkRows(13)
+        tdSql.checkData(0, 0, 1)
+        tdSql.checkData(1, 0, 5)
+        tdSql.checkData(2, 0, 1)
+        tdSql.checkData(3, 0, 1)
+        tdSql.checkData(4, 0, 1)
+        tdSql.checkData(5, 0, 1)
+        tdSql.checkData(6, 0, 10)
+        tdSql.checkData(7, 0, 1)
+        tdSql.checkData(8, 0, 1)
+        tdSql.checkData(9, 0, 1)
+        tdSql.checkData(10, 0, 1)
+        tdSql.checkData(11, 0, 15)
+        tdSql.checkData(12, 0, 1)
+
+        ## {} ...
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:01', '2020-02-01 00:00:04') every(1s) fill(value, 1)")
+        tdSql.checkRows(4)
+        tdSql.checkData(0, 0, 1)
+        tdSql.checkData(1, 0, 1)
+        tdSql.checkData(2, 0, 1)
+        tdSql.checkData(3, 0, 1)
+
+        ## {.}..
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:03', '2020-02-01 00:00:07') every(1s) fill(value, 1)")
+        tdSql.checkRows(5)
+        tdSql.checkData(0, 0, 1)
+        tdSql.checkData(1, 0, 1)
+        tdSql.checkData(2, 0, 5)
+        tdSql.checkData(3, 0, 1)
+        tdSql.checkData(4, 0, 1)
+
+        ## .{}..
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:06', '2020-02-01 00:00:09') every(1s) fill(value, 1)")
+        tdSql.checkRows(4)
+        tdSql.checkData(0, 0, 1)
+        tdSql.checkData(1, 0, 1)
+        tdSql.checkData(2, 0, 1)
+        tdSql.checkData(3, 0, 1)
+
+        ## .{.}.
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:08', '2020-02-01 00:00:12') every(1s) fill(value, 1)")
+        tdSql.checkRows(5)
+        tdSql.checkData(0, 0, 1)
+        tdSql.checkData(1, 0, 1)
+        tdSql.checkData(2, 0, 10)
+        tdSql.checkData(3, 0, 1)
+        tdSql.checkData(4, 0, 1)
+
+        ## ..{.}
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:13', '2020-02-01 00:00:17') every(1s) fill(value, 1)")
+        tdSql.checkRows(5)
+        tdSql.checkData(0, 0, 1)
+        tdSql.checkData(1, 0, 1)
+        tdSql.checkData(2, 0, 15)
+        tdSql.checkData(3, 0, 1)
+        tdSql.checkData(4, 0, 1)
+
+        ## ... {}
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:16', '2020-02-01 00:00:19') every(1s) fill(value, 1)")
+        tdSql.checkRows(4)
+        tdSql.checkData(0, 0, 1)
+        tdSql.checkData(1, 0, 1)
+        tdSql.checkData(2, 0, 1)
+        tdSql.checkData(3, 0, 1)
+
+        tdLog.printNoPrefix("==========step5:fill prev")
+
+        ## {. . .}
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:04', '2020-02-01 00:00:16') every(1s) fill(prev)")
+        tdSql.checkRows(12)
+        tdSql.checkData(0, 0, 5)
+        tdSql.checkData(1, 0, 5)
+        tdSql.checkData(2, 0, 5)
+        tdSql.checkData(3, 0, 5)
+        tdSql.checkData(4, 0, 5)
+        tdSql.checkData(5, 0, 10)
+        tdSql.checkData(6, 0, 10)
+        tdSql.checkData(7, 0, 10)
+        tdSql.checkData(8, 0, 10)
+        tdSql.checkData(9, 0, 10)
+        tdSql.checkData(10, 0, 15)
+        tdSql.checkData(11, 0, 15)
+
+        ## {} ...
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:01', '2020-02-01 00:00:04') every(1s) fill(prev)")
+        tdSql.checkRows(0)
+
+        ## {.}..
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:03', '2020-02-01 00:00:07') every(1s) fill(prev)")
+        tdSql.checkRows(3)
+        tdSql.checkData(0, 0, 5)
+        tdSql.checkData(1, 0, 5)
+        tdSql.checkData(2, 0, 5)
+
+        ## .{}..
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:06', '2020-02-01 00:00:09') every(1s) fill(prev)")
+        tdSql.checkRows(4)
+        tdSql.checkData(0, 0, 5)
+        tdSql.checkData(1, 0, 5)
+        tdSql.checkData(2, 0, 5)
+        tdSql.checkData(3, 0, 5)
+
+        ## .{.}.
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:08', '2020-02-01 00:00:12') every(1s) fill(prev)")
+        tdSql.checkRows(5)
+        tdSql.checkData(0, 0, 5)
+        tdSql.checkData(1, 0, 5)
+        tdSql.checkData(2, 0, 10)
+        tdSql.checkData(3, 0, 10)
+        tdSql.checkData(4, 0, 10)
+
+        ## ..{.}
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:13', '2020-02-01 00:00:17') every(1s) fill(prev)")
+        tdSql.checkRows(5)
+        tdSql.checkData(0, 0, 10)
+        tdSql.checkData(1, 0, 10)
+        tdSql.checkData(2, 0, 15)
+        tdSql.checkData(3, 0, 15)
+        tdSql.checkData(4, 0, 15)
+
+        ## ... {}
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:16', '2020-02-01 00:00:19') every(1s) fill(prev)")
+        tdSql.checkRows(4)
+        tdSql.checkData(0, 0, 15)
+        tdSql.checkData(1, 0, 15)
+        tdSql.checkData(2, 0, 15)
+        tdSql.checkData(3, 0, 15)
+
+        tdLog.printNoPrefix("==========step6:fill next")
+
+        ## {. . .}
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:04', '2020-02-01 00:00:16') every(1s) fill(next)")
+        tdSql.checkRows(12)
+        tdSql.checkData(0, 0, 5)
+        tdSql.checkData(1, 0, 5)
+        tdSql.checkData(2, 0, 10)
+        tdSql.checkData(3, 0, 10)
+        tdSql.checkData(4, 0, 10)
+        tdSql.checkData(5, 0, 10)
+        tdSql.checkData(6, 0, 10)
+        tdSql.checkData(7, 0, 15)
+        tdSql.checkData(8, 0, 15)
+        tdSql.checkData(9, 0, 15)
+        tdSql.checkData(10, 0, 15)
+        tdSql.checkData(11, 0, 15)
+
+        ## {} ...
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:01', '2020-02-01 00:00:04') every(1s) fill(next)")
+        tdSql.checkRows(4)
+        tdSql.checkData(0, 0, 5)
+        tdSql.checkData(1, 0, 5)
+        tdSql.checkData(2, 0, 5)
+        tdSql.checkData(3, 0, 5)
+
+        ## {.}..
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:03', '2020-02-01 00:00:07') every(1s) fill(next)")
+        tdSql.checkRows(5)
+        tdSql.checkData(0, 0, 5)
+        tdSql.checkData(1, 0, 5)
+        tdSql.checkData(2, 0, 5)
+        tdSql.checkData(3, 0, 10)
+        tdSql.checkData(4, 0, 10)
+
+        ## .{}..
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:06', '2020-02-01 00:00:09') every(1s) fill(next)")
+        tdSql.checkRows(4)
+        tdSql.checkData(0, 0, 10)
+        tdSql.checkData(1, 0, 10)
+        tdSql.checkData(2, 0, 10)
+        tdSql.checkData(3, 0, 10)
+
+        ## .{.}.
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:08', '2020-02-01 00:00:12') every(1s) fill(next)")
+        tdSql.checkRows(5)
+        tdSql.checkData(0, 0, 10)
+        tdSql.checkData(1, 0, 10)
+        tdSql.checkData(2, 0, 10)
+        tdSql.checkData(3, 0, 15)
+        tdSql.checkData(4, 0, 15)
+
+        ## ..{.}
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:13', '2020-02-01 00:00:17') every(1s) fill(next)")
+        tdSql.checkRows(3)
+        tdSql.checkData(0, 0, 15)
+        tdSql.checkData(1, 0, 15)
+        tdSql.checkData(2, 0, 15)
+
+        ## ... {}
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:16', '2020-02-01 00:00:19') every(1s) fill(next)")
+        tdSql.checkRows(0)
+
+
+        tdLog.printNoPrefix("==========step7:fill linear")
+
+        ## {. . .}
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:04', '2020-02-01 00:00:16') every(1s) fill(linear)")
+        tdSql.checkRows(11)
+        tdSql.checkData(0, 0, 5)
+        tdSql.checkData(1, 0, 6)
+        tdSql.checkData(2, 0, 7)
+        tdSql.checkData(3, 0, 8)
+        tdSql.checkData(4, 0, 9)
+        tdSql.checkData(5, 0, 10)
+        tdSql.checkData(6, 0, 11)
+        tdSql.checkData(7, 0, 12)
+        tdSql.checkData(8, 0, 13)
+        tdSql.checkData(9, 0, 14)
+        tdSql.checkData(10, 0, 15)
+
+        ## {} ...
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:01', '2020-02-01 00:00:04') every(1s) fill(linear)")
+        tdSql.checkRows(0)
+
+        ## {.}..
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:03', '2020-02-01 00:00:07') every(1s) fill(linear)")
+        tdSql.checkRows(3)
+        tdSql.checkData(0, 0, 5)
+        tdSql.checkData(1, 0, 6)
+        tdSql.checkData(2, 0, 7)
+
+        ## .{}..
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:06', '2020-02-01 00:00:09') every(1s) fill(linear)")
+        tdSql.checkRows(4)
+        tdSql.checkData(0, 0, 6)
+        tdSql.checkData(1, 0, 7)
+        tdSql.checkData(2, 0, 8)
+        tdSql.checkData(3, 0, 9)
+
+        ## .{.}.
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:08', '2020-02-01 00:00:12') every(1s) fill(linear)")
+        tdSql.checkRows(5)
+        tdSql.checkData(0, 0, 8)
+        tdSql.checkData(1, 0, 9)
+        tdSql.checkData(2, 0, 10)
+        tdSql.checkData(3, 0, 11)
+        tdSql.checkData(4, 0, 12)
+
+        ## ..{.}
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:13', '2020-02-01 00:00:17') every(1s) fill(linear)")
+        tdSql.checkRows(3)
+        tdSql.checkData(0, 0, 13)
+        tdSql.checkData(1, 0, 14)
+        tdSql.checkData(2, 0, 15)
+
+        ## ... {}
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:16', '2020-02-01 00:00:19') every(1s) fill(linear)")
+        tdSql.checkRows(0)
+
+
+        tdLog.printNoPrefix("==========step8:test intra block interpolation")
+        tdSql.execute(f"drop database {dbname}");
+
+        tdSql.prepare()
+
+        tdSql.execute(f"create table if not exists {dbname}.{tbname} (ts timestamp, c0 tinyint, c1 smallint, c2 int, c3 bigint, c4 double, c5 float, c6 bool, c7 varchar(10), c8 nchar(10))")
+
+        # set two data point has 10 days interval will be stored in different datablocks
+        tdSql.execute(f"insert into {dbname}.{tbname} values ('2020-02-01 00:00:05', 5, 5, 5, 5, 5.0, 5.0, true, 'varchar', 'nchar')")
+        tdSql.execute(f"insert into {dbname}.{tbname} values ('2020-02-11 00:00:05', 15, 15, 15, 15, 15.0, 15.0, true, 'varchar', 'nchar')")
+
+        tdSql.execute(f"flush database {dbname}");
+
+        # test fill null
+
+        ## | {. | | .} |
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:05', '2020-02-11 00:00:05') every(1d) fill(null)")
+        tdSql.checkRows(11)
+        tdSql.checkData(0, 0, 5)
+        tdSql.checkData(1, 0, None)
+        tdSql.checkData(2, 0, None)
+        tdSql.checkData(3, 0, None)
+        tdSql.checkData(4, 0, None)
+        tdSql.checkData(5, 0, None)
+        tdSql.checkData(6, 0, None)
+        tdSql.checkData(7, 0, None)
+        tdSql.checkData(8, 0, None)
+        tdSql.checkData(9, 0, None)
+        tdSql.checkData(10, 0, 15)
+
+        ## | . | {} | . |
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-03 00:00:05', '2020-02-07 00:00:05') every(1d) fill(null)")
+        tdSql.checkRows(5)
+        tdSql.checkData(0, 0, None)
+        tdSql.checkData(1, 0, None)
+        tdSql.checkData(2, 0, None)
+        tdSql.checkData(3, 0, None)
+        tdSql.checkData(4, 0, None)
+
+        ## | {. | } | . |
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-01-31 00:00:05', '2020-02-05 00:00:05') every(1d) fill(null)")
+        tdSql.checkRows(6)
+        tdSql.checkData(0, 0, None)
+        tdSql.checkData(1, 0, 5)
+        tdSql.checkData(2, 0, None)
+        tdSql.checkData(3, 0, None)
+        tdSql.checkData(4, 0, None)
+        tdSql.checkData(5, 0, None)
+
+        ## | . | { | .} |
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-10 00:00:05', '2020-02-15 00:00:05') every(1d) fill(null)")
+        tdSql.checkRows(6)
+        tdSql.checkData(0, 0, None)
+        tdSql.checkData(1, 0, 15)
+        tdSql.checkData(2, 0, None)
+        tdSql.checkData(3, 0, None)
+        tdSql.checkData(4, 0, None)
+        tdSql.checkData(5, 0, None)
+
+
+        # test fill value
+
+        ## | {. | | .} |
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:05', '2020-02-11 00:00:05') every(1d) fill(value, 1)")
+        tdSql.checkRows(11)
+        tdSql.checkData(0, 0, 5)
+        tdSql.checkData(1, 0, 1)
+        tdSql.checkData(2, 0, 1)
+        tdSql.checkData(3, 0, 1)
+        tdSql.checkData(4, 0, 1)
+        tdSql.checkData(5, 0, 1)
+        tdSql.checkData(6, 0, 1)
+        tdSql.checkData(7, 0, 1)
+        tdSql.checkData(8, 0, 1)
+        tdSql.checkData(9, 0, 1)
+        tdSql.checkData(10, 0, 15)
+
+        ## | . | {} | . |
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-03 00:00:05', '2020-02-07 00:00:05') every(1d) fill(value, 1)")
+        tdSql.checkRows(5)
+        tdSql.checkData(0, 0, 1)
+        tdSql.checkData(1, 0, 1)
+        tdSql.checkData(2, 0, 1)
+        tdSql.checkData(3, 0, 1)
+        tdSql.checkData(4, 0, 1)
+
+        ## | {. | } | . |
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-01-31 00:00:05', '2020-02-05 00:00:05') every(1d) fill(value, 1)")
+        tdSql.checkRows(6)
+        tdSql.checkData(0, 0, 1)
+        tdSql.checkData(1, 0, 5)
+        tdSql.checkData(2, 0, 1)
+        tdSql.checkData(3, 0, 1)
+        tdSql.checkData(4, 0, 1)
+        tdSql.checkData(5, 0, 1)
+
+        ## | . | { | .} |
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-10 00:00:05', '2020-02-15 00:00:05') every(1d) fill(value, 1)")
+        tdSql.checkRows(6)
+        tdSql.checkData(0, 0, 1)
+        tdSql.checkData(1, 0, 15)
+        tdSql.checkData(2, 0, 1)
+        tdSql.checkData(3, 0, 1)
+        tdSql.checkData(4, 0, 1)
+        tdSql.checkData(5, 0, 1)
+
+
+        # test fill prev
+
+        ## | {. | | .} |
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:05', '2020-02-11 00:00:05') every(1d) fill(prev)")
+        tdSql.checkRows(11)
+        tdSql.checkData(0, 0, 5)
+        tdSql.checkData(1, 0, 5)
+        tdSql.checkData(2, 0, 5)
+        tdSql.checkData(3, 0, 5)
+        tdSql.checkData(4, 0, 5)
+        tdSql.checkData(5, 0, 5)
+        tdSql.checkData(6, 0, 5)
+        tdSql.checkData(7, 0, 5)
+        tdSql.checkData(8, 0, 5)
+        tdSql.checkData(9, 0, 5)
+        tdSql.checkData(10, 0, 15)
+
+        ## | . | {} | . |
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-03 00:00:05', '2020-02-07 00:00:05') every(1d) fill(prev)")
+        tdSql.checkRows(5)
+        tdSql.checkData(0, 0, 5)
+        tdSql.checkData(1, 0, 5)
+        tdSql.checkData(2, 0, 5)
+        tdSql.checkData(3, 0, 5)
+        tdSql.checkData(4, 0, 5)
+
+        ## | {. | } | . |
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-01-31 00:00:05', '2020-02-05 00:00:05') every(1d) fill(prev)")
+        tdSql.checkRows(5)
+        tdSql.checkData(0, 0, 5)
+        tdSql.checkData(1, 0, 5)
+        tdSql.checkData(2, 0, 5)
+        tdSql.checkData(3, 0, 5)
+        tdSql.checkData(4, 0, 5)
+
+        ## | . | { | .} |
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-10 00:00:05', '2020-02-15 00:00:05') every(1d) fill(prev)")
+        tdSql.checkRows(6)
+        tdSql.checkData(0, 0, 5)
+        tdSql.checkData(1, 0, 15)
+        tdSql.checkData(2, 0, 15)
+        tdSql.checkData(3, 0, 15)
+        tdSql.checkData(4, 0, 15)
+        tdSql.checkData(5, 0, 15)
+
+        # test fill next
+
+        ## | {. | | .} |
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-01 00:00:05', '2020-02-11 00:00:05') every(1d) fill(next)")
+        tdSql.checkRows(11)
+        tdSql.checkData(0, 0, 5)
+        tdSql.checkData(1, 0, 15)
+        tdSql.checkData(2, 0, 15)
+        tdSql.checkData(3, 0, 15)
+        tdSql.checkData(4, 0, 15)
+        tdSql.checkData(5, 0, 15)
+        tdSql.checkData(6, 0, 15)
+        tdSql.checkData(7, 0, 15)
+        tdSql.checkData(8, 0, 15)
+        tdSql.checkData(9, 0, 15)
+        tdSql.checkData(10, 0, 15)
+
+        ## | . | {} | . |
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-03 00:00:05', '2020-02-07 00:00:05') every(1d) fill(next)")
+        tdSql.checkRows(5)
+        tdSql.checkData(0, 0, 15)
+        tdSql.checkData(1, 0, 15)
+        tdSql.checkData(2, 0, 15)
+        tdSql.checkData(3, 0, 15)
+        tdSql.checkData(4, 0, 15)
+
+        ## | {. | } | . |
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-01-31 00:00:05', '2020-02-05 00:00:05') every(1d) fill(next)")
+        tdSql.checkRows(6)
+        tdSql.checkData(0, 0, 5)
+        tdSql.checkData(1, 0, 5)
+        tdSql.checkData(2, 0, 15)
+        tdSql.checkData(3, 0, 15)
+        tdSql.checkData(4, 0, 15)
+        tdSql.checkData(5, 0, 15)
+
+        ## | . | { | .} |
+        tdSql.query(f"select interp(c0) from {dbname}.{tbname} range('2020-02-10 00:00:05', '2020-02-15 00:00:05') every(1d) fill(next)")
+        tdSql.checkRows(2)
+        tdSql.checkData(0, 0, 15)
+        tdSql.checkData(1, 0, 15)
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success(f"{__file__} successfully executed")
+
+tdCases.addLinux(__file__, TDTestCase())
+tdCases.addWindows(__file__, TDTestCase())