fix json_tag crash

tests/script/tsim/tagindex/add_index.sim

@@ -1,61 +0,0 @@
-system sh/stop_dnodes.sh
-system sh/deploy.sh -n dnode1 -i 1
-system sh/exec.sh -n dnode1 -s start
-sql connect
-
-print ======== step0
-$dbPrefix = ta_3_db
-$tbPrefix = ta_3_tb
-$mtPrefix = ta_3_mt
-$tbNum = 1000
-$rowNum = 20
-$totalNum = 200
-
-print =============== create database 
-sql create database $dbPrefix 
-sql use $dbPrefix 
-
-print =============== create super table and register rsma
-sql create table if not exists $mtPrefix (ts timestamp, c1 int) tags (t1 int, t2 int, t3 int, t4 int, t5 int)
-
-sql show stables
-if $rows != 1 then
-  return -1
-endi
-
-print =============== create child table
-
-$i = 0 
-while $i < $tbNum 
-    $tb = $tbPrefix . $i 
-    sql create table $tb using $mtPrefix  tags($i, $i, $i,$i, $i);
-endw
-
-sql show tables
-if $rows != $tbNum then
-  return -1
-endi
-
-
-
-print =============== insert data into each table 
-$i = 0
-while $i < $tbNum
-  $tb = $tbPrefix . $i
-  sql insert into $sb values(now, 10);
-endw
-
-
-sql create index ti2 on $tb(t2)
-#sql create index ti2 on $tb(t3)
-
-
-$i = 0
-while $i < $tbNum
-  sql select * from $mtPrefix where t2=$i;
-  if $rows > 1 then
-    return -1
-  endi
-endw
-
-system sh/exec.sh -n dnode1 -s stop -x SIGINT