Python, how to check if a result set is empty?

Question

I have a sql statement that returns no hits. For example, \'select * from TAB where 1 = 2\'.

I want to check how many rows are returned,

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Answer 1

MySQLdb will not raise an exception if the result set is empty. Additionally cursor.execute() function will return a long value which is number of rows in the fetched result set. So if you want to check for empty results, your code can be re-written as

rows_count = cursor.execute(query_sql)
if rows_count > 0:
     rs = cursor.fetchall()
else:
     // handle empty result set