Re: [SQL] How do i extract a certain bit from a bigint column

2004-05-12 Thread Bruno Wolff III
On Wed, May 12, 2004 at 08:17:39 -0400, Mike Rylander <[EMAIL PROTECTED]> wrote: > > The easiest way is to test for a bit using bitwise and: > > SELECT * FROM table WHERE (status & 2::BIGINT) <> 0 AND (status & 8::BIGINT) = > 0; The following will probably be a bit faster: SELECT * FROM table

Re: [SQL] How do i extract a certain bit from a bigint column

2004-05-12 Thread Tom Lane
=?iso-8859-1?Q?Mats_Sj=F6berg?= <[EMAIL PROTECTED]> writes: > What is the syntax to extract those bits? At least in 7.4, you can do it the same way you'd do it in C: regression=# select ((47::bigint) >> 3) & 1; ?column? -- 1 (1 row) I'm not sure when the bigint >> and & operato

Re: [SQL] How do i extract a certain bit from a bigint column

2004-05-12 Thread Mike Rylander
On Wednesday 12 May 2004 07:05 am, Mats Sjöberg wrote: > Hello everyone > In a table i have a column status of type bigint. > I need to create a view of the table including all rows with bit 4 set > (value 8). > At the same time i need to exclude excludig all rows with bit 2 set. > > What is the sy

[SQL] How do i extract a certain bit from a bigint column

2004-05-12 Thread Mats Sjöberg
Hello everyone In a table i have a column status of type bigint. I need to create a view of the table including all rows with bit 4 set (value 8). At the same time i need to exclude excludig all rows with bit 2 set.   What is the syntax to extract those bits? I have tested get_bit(str