I would like to check if a table exist before dropping this table. I used this function
if noOfRows('mytable')>0 then
drop table mytable;
However, later i found that if a table has been created but contains no data. noOfRows function also return a number which is less or equals to zero. The scenario is as below:
load * from
The above scenario creates mytable and makes it empty by a inner join.
This causes my table not being dropped. Could anyone tell me if there is another way of checking the existence of a table?
Hi in case anybody facing the same problem. I've already found a solution. I check the output of noOfRows('table') under debug. If a table does not exist, it returns null, else it returns the number of rows in a table. So in order to check whether a table exists of not. We should use
if noOfRows('table') <>null then