How do I cast a string to integer and have 0 in case of error in the cast with PostgreSQL?

Posted by silviot on Stack Overflow See other posts from Stack Overflow or by silviot
Published on 2010-01-17T21:17:29Z Indexed on 2010/05/24 3:10 UTC
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Filed under:

sql

|

postgresql

|

casting

In postgres I have a table with a varchar column. The data is supposed to be integers and I need it in iteger type in a query. Some values are empty strings. The following:

SELECT myfield::integer FROM mytable

yields ERROR: invalid input syntax for integer: ""

How can I query a cast and have 0 in case of error during the cast in postgres?

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