Re: [HACKERS] Dumb question: How do I determine programmatically
Dann Corbit wrote: What API call can I make to find out if a column is nullable or not? SELECT attnotnull FROM pg_attribute ... see documentation Internals/System Catalogs Regards, Andreas ---(end of broadcast)--- TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]
Re: [HACKERS] Dumb question: How do I determine programmatically if a column is nullable?
-Original Message- From: Andreas Pflug [mailto:[EMAIL PROTECTED] Sent: Wednesday, January 07, 2004 11:17 AM To: Dann Corbit Cc: [EMAIL PROTECTED] Subject: Re: [HACKERS] Dumb question: How do I determine programmatically if a column is nullable? Dann Corbit wrote: What API call can I make to find out if a column is nullable or not? SELECT attnotnull FROM pg_attribute ... see documentation Internals/System Catalogs Is there a way do do it when I have some arbitrary query that returns a result set? In other words, I will be passed a SQL query. I don't want to have to parse it myself. Rather, I want to know (for the bound columns) if a column is nullable or not. Is the functionality available in [for example] libpq? ---(end of broadcast)--- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
Re: [HACKERS] Dumb question: How do I determine programmatically if a column is nullable?
Dann Corbit [EMAIL PROTECTED] writes: In other words, I will be passed a SQL query. I don't want to have to parse it myself. Rather, I want to know (for the bound columns) if a column is nullable or not. Is the functionality available in [for example] libpq? As of 7.4, see PQftable() and PQftablecol(), and look into pg_attribute to see whether the column is marked NOTNULL. regards, tom lane ---(end of broadcast)--- TIP 3: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
