Returns random number or rows with every exeuction

[Hiteshbardoli]

I am using ODBC setup for presto sql 0.334. When I run count (*) against a table or select single column, I get same number of rows and correct result every time. But when I select all the columns, output query returns random number of rows. If the actual result contains 1000 rows, it would return result ranging from 0 to 1000.
My JDBC client gives consistent performance.
Would you please suggest how can I add debugging to know the root cause of this behavior.