diff --git a/src/client/src/tscFunctionImpl.c b/src/client/src/tscFunctionImpl.c
index 60e9596ec41ce41f5d727d3016663b752dc32fd0..1b4f92d3fc9fc78951e23eaec4c438d7522bf7f1 100644
--- a/src/client/src/tscFunctionImpl.c
+++ b/src/client/src/tscFunctionImpl.c
@@ -2445,8 +2445,8 @@ static bool percentile_function_setup(SQLFunctionCtx *pCtx) {
   // in the first round, get the min-max value of all involved data
   SResultInfo *pResInfo = GET_RES_INFO(pCtx);
   SPercentileInfo *pInfo = pResInfo->interResultBuf;
-  pInfo->minval = DBL_MAX;
-  pInfo->maxval = -DBL_MAX;
+  SET_DOUBLE_VAL(&pInfo->minval, DBL_MAX);
+  SET_DOUBLE_VAL(&pInfo->maxval, -DBL_MAX);
   pInfo->numOfElems = 0;
 
   return true;
@@ -2461,12 +2461,12 @@ static void percentile_function(SQLFunctionCtx *pCtx) {
   // the first stage, only acquire the min/max value
   if (pInfo->stage == 0) {
     if (pCtx->preAggVals.isSet) {
-      if (pInfo->minval > pCtx->preAggVals.statis.min) {
-        pInfo->minval = (double)pCtx->preAggVals.statis.min;
+      if (GET_DOUBLE_VAL(&pInfo->minval) > pCtx->preAggVals.statis.min) {
+        SET_DOUBLE_VAL(&pInfo->minval, (double)pCtx->preAggVals.statis.min);
       }
 
-      if (pInfo->maxval < pCtx->preAggVals.statis.max) {
-        pInfo->maxval = (double)pCtx->preAggVals.statis.max;
+      if (GET_DOUBLE_VAL(&pInfo->maxval) < pCtx->preAggVals.statis.max) {
+        SET_DOUBLE_VAL(&pInfo->maxval, (double)pCtx->preAggVals.statis.max);
       }
 
       pInfo->numOfElems += (pCtx->size - pCtx->preAggVals.statis.numOfNull);
@@ -2500,12 +2500,12 @@ static void percentile_function(SQLFunctionCtx *pCtx) {
             break;
         }
 
-        if (v < pInfo->minval) {
-          pInfo->minval = v;
+        if (v < GET_DOUBLE_VAL(&pInfo->minval)) {
+          SET_DOUBLE_VAL(&pInfo->minval, v);
         }
 
-        if (v > pInfo->maxval) {
-          pInfo->maxval = v;
+        if (v > GET_DOUBLE_VAL(&pInfo->maxval)) {
+          SET_DOUBLE_VAL(&pInfo->maxval, v);
         }
 
         pInfo->numOfElems += 1;
@@ -2564,12 +2564,12 @@ static void percentile_function_f(SQLFunctionCtx *pCtx, int32_t index) {
         break;
     }
 
-    if (v < pInfo->minval) {
-      pInfo->minval = v;
+    if (v < GET_DOUBLE_VAL(&pInfo->minval)) {
+      SET_DOUBLE_VAL(&pInfo->minval, v);
     }
 
-    if (v > pInfo->maxval) {
-      pInfo->maxval = v;
+    if (v > GET_DOUBLE_VAL(&pInfo->maxval)) {
+      SET_DOUBLE_VAL(&pInfo->maxval, v);
     }
 
     pInfo->numOfElems += 1;
@@ -2609,7 +2609,7 @@ static void percentile_next_step(SQLFunctionCtx *pCtx) {
     }
 
     pInfo->stage += 1;
-    pInfo->pMemBucket = tMemBucketCreate(pCtx->inputBytes, pCtx->inputType, pInfo->minval, pInfo->maxval);
+    pInfo->pMemBucket = tMemBucketCreate(pCtx->inputBytes, pCtx->inputType, GET_DOUBLE_VAL(&pInfo->minval), GET_DOUBLE_VAL(&pInfo->maxval));
   } else {
     pResInfo->complete = true;
   }
diff --git a/src/inc/taosdef.h b/src/inc/taosdef.h
index 01a4ed32f11e2badd6bda7ffdf862195c408dcbd..aee60da20147c674979540aa73da5ac101fae7f0 100644
--- a/src/inc/taosdef.h
+++ b/src/inc/taosdef.h
@@ -194,9 +194,9 @@ static FORCE_INLINE bool isNull(const char *val, int32_t type) {
     case TSDB_DATA_TYPE_DOUBLE:
       return *(uint64_t *)val == TSDB_DATA_DOUBLE_NULL;
     case TSDB_DATA_TYPE_NCHAR:
-      return *(uint32_t*) varDataVal(val) == TSDB_DATA_NCHAR_NULL;
+      return varDataLen(val) == sizeof(int32_t) && *(uint32_t*) varDataVal(val) == TSDB_DATA_NCHAR_NULL;
     case TSDB_DATA_TYPE_BINARY:
-      return *(uint8_t *) varDataVal(val) == TSDB_DATA_BINARY_NULL;
+      return varDataLen(val) == sizeof(int8_t) && *(uint8_t *) varDataVal(val) == TSDB_DATA_BINARY_NULL;
     default:
       return false;
   };
diff --git a/src/tsdb/src/tsdbRead.c b/src/tsdb/src/tsdbRead.c
index f0a2694b608363518c76b63d2e1e674330fba2fa..8ca71e4555534b874fd173edaf25896d9613decf 100644
--- a/src/tsdb/src/tsdbRead.c
+++ b/src/tsdb/src/tsdbRead.c
@@ -2284,7 +2284,7 @@ void filterPrepare(void* expr, void* param) {
   if (pInfo->optr == TSDB_RELATION_IN) {
     pInfo->q = (char*) pCond->arr;
   } else {
-    pInfo->q = calloc(1, pSchema->bytes);
+    pInfo->q = calloc(1, pSchema->bytes + TSDB_NCHAR_SIZE);   // to make sure tonchar does not cause invalid write, since the '\0' needs at least sizeof(wchar_t) space.
     tVariantDump(pCond, pInfo->q, pSchema->type, true);
   }
 }
diff --git a/tests/script/general/insert/query_block1_memory.sim b/tests/script/general/insert/query_block1_memory.sim
index 83509ad5b0de17500f87591f5cb0a9c3a3c21438..bec9190f9b93044d4321b96d6604209cbc78daba 100644
--- a/tests/script/general/insert/query_block1_memory.sim
+++ b/tests/script/general/insert/query_block1_memory.sim
@@ -30,9 +30,11 @@ print =============== step 1
 $x = $N
 $y = $N / 2
 while $x > $y
-  $ms = $x . m 
+  $z = $x * 60000
+  $ms = 1601481600000 - $z
+
   $xt = - . $x 
-  sql insert into $tb values (now - $ms , -$x ) 
+  sql insert into $tb values ($ms , -$x ) 
   $x = $x - 1
 endw 
 
@@ -45,8 +47,10 @@ endi
 $x = $N / 2
 $y = $N
 while $x < $y
-  $ms = $x . m 
-  sql insert into $tb values (now + $ms , $x ) 
+  $z = $x * 60000
+  $ms = 1601481600000 + $z
+
+  sql insert into $tb values ($ms , $x ) 
   $x = $x + 1
 endw 
 sql select * from $tb
@@ -60,14 +64,14 @@ print =============== step 2
 $N1 = $N + 1
 $result1 = $N / 2
 $result2 = $N
-$step = $N1 . m
-
-$start1 = now- . $step
-$start2 = now
-$start3 = now+ . $step
-$end1 = now- . $step
-$end2 = now
-$end3 = now+ . $step
+$step = $N1 * 60000
+
+$start1 = 1601481600000 -  $step
+$start2 = 1601481600000
+$start3 = 1601481600000 + $step
+$end1 = 1601481600000 -  $step
+$end2 = 1601481600000
+$end3 = 1601481600000 +  $step
 
 sql select * from $tb where ts < $start1 and ts > $end1
 if $rows != 0 then 
diff --git a/tests/script/general/parser/where.sim b/tests/script/general/parser/where.sim
index e609dda652304846081c28a43ed6745be3806eb3..5cac3f47235c1321d740e373d0f5828f076c31c7 100644
--- a/tests/script/general/parser/where.sim
+++ b/tests/script/general/parser/where.sim
@@ -33,7 +33,8 @@ while $i < $tbNum
 
   $x = 0
   while $x < $rowNum
-    $ms = $x . m
+    $y = $x * 60000
+    $ms = 1600099200000 + $y
     $c = $x / 100
     $c = $c * 100
     $c = $x - $c
@@ -41,7 +42,7 @@ while $i < $tbNum
     $binary = $binary . '
     $nchar = 'nchar . $c
     $nchar = $nchar . '
-    sql insert into $tb values (now + $ms , $c , $c , $c , $c , $c , $c , $c , $binary , $nchar )
+    sql insert into $tb values ($ms , $c , $c , $c , $c , $c , $c , $c , $binary , $nchar )
     $x = $x + 1
   endw
 
@@ -299,7 +300,8 @@ while $i < 1
 
   $x = 0
   while $x < 10000
-    $ms = $x . m
+    $y = $x * 60000
+    $ms = 1601481600000 + $y
     $c = $x / 100
     $c = $c * 100
     $c = $x - $c
@@ -307,7 +309,7 @@ while $i < 1
     $binary = $binary . '
     $nchar = 'nchar . $c
     $nchar = $nchar . '
-    sql insert into $tb values (now + $ms , null , null , null , null , null , null , null , null , null )
+    sql insert into $tb values ($ms , null , null , null , null , null , null , null , null , null )
     $x = $x + 1
   endw
 
diff --git a/tests/script/general/stream/table_n.sim b/tests/script/general/stream/table_n.sim
index d1b4a87a9ea641a8f4d58e0d9fc61bd9ac7c7477..a336772a9819ec54607265913eb65c26a2ec1a28 100644
--- a/tests/script/general/stream/table_n.sim
+++ b/tests/script/general/stream/table_n.sim
@@ -289,3 +289,5 @@ endi
 if $data09 != 20 then 
   return -1
 endi
+
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
\ No newline at end of file
diff --git a/tests/script/unique/cluster/vgroup100.sim b/tests/script/unique/cluster/vgroup100.sim
index 7879c5529efa242cabcc37ce93791bc50e7197e5..68a5bad6b32dc23c667900707d3e9027ac943077 100644
--- a/tests/script/unique/cluster/vgroup100.sim
+++ b/tests/script/unique/cluster/vgroup100.sim
@@ -29,6 +29,9 @@ system sh/exec.sh -n dnode3 -s start
 
 sleep 3000
 
+$maxNum = 102
+$maxNum = 12
+
 $x = 0
 show2: 
 	$x = $x + 1
@@ -58,7 +61,7 @@ endi
 
 print ============================== step3
 $count = 2
-while $count < 102
+while $count < $maxNum
   $db = d . $count
   $tb = $db . .t
   $tb2 = $db . .t2
@@ -73,7 +76,7 @@ endw
 print ============================== step4
 
 $count = 2
-while $count < 102
+while $count < $maxNum
   $db = d . $count
   $tb = $db . .t
   sql select * from $tb
@@ -131,7 +134,7 @@ show8:
 	endi
 
 $count = 2
-while $count < 102
+while $count < $maxNum
   $db = d . $count
   $tb = $db . .t
   sql select * from $tb