Обсуждение: removing a restriction
I have a column that was created with a 'not null' restriction. How do I remove it?
Tom Allison wrote: > I have a column that was created with a 'not null' restriction. > How do I remove it? alter table set > > > > ---------------------------(end of broadcast)--------------------------- > TIP 4: Have you searched our list archives? > > http://archives.postgresql.org/ > -- === The PostgreSQL Company: Command Prompt, Inc. === Sales/Support: +1.503.667.4564 || 24x7/Emergency: +1.800.492.2240 Providing the most comprehensive PostgreSQL solutions since 1997 http://www.commandprompt.com/ Donate to the PostgreSQL Project: http://www.postgresql.org/about/donate PostgreSQL Replication: http://www.commandprompt.com/products/
alter TABLE user_history ALTER COLUMN seen_as set not null; turns it on... I want to turn it off.... On May 30, 2007, at 9:05 PM, Joshua D. Drake wrote: > > Tom Allison wrote: >> I have a column that was created with a 'not null' restriction. >> How do I remove it? > > alter table set > >> ---------------------------(end of >> broadcast)--------------------------- >> TIP 4: Have you searched our list archives? >> http://archives.postgresql.org/ > > > -- > > === The PostgreSQL Company: Command Prompt, Inc. === > Sales/Support: +1.503.667.4564 || 24x7/Emergency: +1.800.492.2240 > Providing the most comprehensive PostgreSQL solutions since 1997 > http://www.commandprompt.com/ > > Donate to the PostgreSQL Project: http://www.postgresql.org/about/ > donate > PostgreSQL Replication: http://www.commandprompt.com/products/ > > > ---------------------------(end of > broadcast)--------------------------- > TIP 5: don't forget to increase your free space map settings
Tom Allison wrote: > alter TABLE user_history ALTER COLUMN seen_as set not null; > > turns it on... > I want to turn it off.... DROP NOT NULL; > > On May 30, 2007, at 9:05 PM, Joshua D. Drake wrote: > >> >> Tom Allison wrote: >>> I have a column that was created with a 'not null' restriction. >>> How do I remove it? >> >> alter table set >> >>> ---------------------------(end of broadcast)--------------------------- >>> TIP 4: Have you searched our list archives? >>> http://archives.postgresql.org/ >> >> >> -- >> === The PostgreSQL Company: Command Prompt, Inc. === >> Sales/Support: +1.503.667.4564 || 24x7/Emergency: +1.800.492.2240 >> Providing the most comprehensive PostgreSQL solutions since 1997 >> http://www.commandprompt.com/ >> >> Donate to the PostgreSQL Project: http://www.postgresql.org/about/donate >> PostgreSQL Replication: http://www.commandprompt.com/products/ >> >> >> ---------------------------(end of broadcast)--------------------------- >> TIP 5: don't forget to increase your free space map settings > > > ---------------------------(end of broadcast)--------------------------- > TIP 2: Don't 'kill -9' the postmaster > -- === The PostgreSQL Company: Command Prompt, Inc. === Sales/Support: +1.503.667.4564 || 24x7/Emergency: +1.800.492.2240 Providing the most comprehensive PostgreSQL solutions since 1997 http://www.commandprompt.com/ Donate to the PostgreSQL Project: http://www.postgresql.org/about/donate PostgreSQL Replication: http://www.commandprompt.com/products/