Обсуждение: Fw: ERROR: operator does not exist: date ~~ unknown
Ya...I simply changed column type to text and it worked. :D
I had requirements where I needed such a functionality. There was no way to do it any other way...
Thanks man
I had requirements where I needed such a functionality. There was no way to do it any other way...
Thanks man
----- Forwarded Message ----
From: Pavel Stehule <pavel.stehule@gmail.com>
To: Rohit Suman <handsome_94@yahoo.com>
Cc: pgsql-sql@postgresql.org
Sent: Sunday, 12 April, 2009 1:06:16 PM
Subject: Re: [SQL] ERROR: operator does not exist: date ~~ unknown
Hello
it means - there are not operator LIKE for datatype date. Why do you
do it? Try to look on date_part or extract functions.
Fast solution, bot not optimal, is cast date to text via function
to_char(date, 'mask')
regards
Pavel Stehule
2009/4/12 Rohit Suman <handsome_94@yahoo.com>:
> Hi
>
> I've a table bins in which I've a column named "Date In" which stores
> values of "Date" type. I've postgresql 8.3.5
>
> Now when I execute query " select * from bins where "Date In" like '%'; " I
> get the folowing error :
>
>
> SQL error:
>
> ERROR: operator does not exist: date ~~ unknown
> LINE 1: select * from bins where "Date In" like '%';
> ^
> HINT: No operator matches the given name and argument type(s). You might
> need to add explicit type casts.
>
> In statement:
> select * from bins where "Date In" like '%';
>
> Please help...I'm stuck for like 3-4 hours now on this X_X
>
> Rohit
>
> ________________________________
> Add more friends to your messenger and enjoy! Invite them now.
From: Pavel Stehule <pavel.stehule@gmail.com>
To: Rohit Suman <handsome_94@yahoo.com>
Cc: pgsql-sql@postgresql.org
Sent: Sunday, 12 April, 2009 1:06:16 PM
Subject: Re: [SQL] ERROR: operator does not exist: date ~~ unknown
Hello
it means - there are not operator LIKE for datatype date. Why do you
do it? Try to look on date_part or extract functions.
Fast solution, bot not optimal, is cast date to text via function
to_char(date, 'mask')
regards
Pavel Stehule
2009/4/12 Rohit Suman <handsome_94@yahoo.com>:
> Hi
>
> I've a table bins in which I've a column named "Date In" which stores
> values of "Date" type. I've postgresql 8.3.5
>
> Now when I execute query " select * from bins where "Date In" like '%'; " I
> get the folowing error :
>
>
> SQL error:
>
> ERROR: operator does not exist: date ~~ unknown
> LINE 1: select * from bins where "Date In" like '%';
> ^
> HINT: No operator matches the given name and argument type(s). You might
> need to add explicit type casts.
>
> In statement:
> select * from bins where "Date In" like '%';
>
> Please help...I'm stuck for like 3-4 hours now on this X_X
>
> Rohit
>
> ________________________________
> Add more friends to your messenger and enjoy! Invite them now.
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Rohit Suman <handsome_94@yahoo.com> writes:
> Ya...I simply changed column type to text and it worked. :D
> I had requirements where I needed such a functionality. There was no way to do it any other way...
You should really, really take a second look at those "requirements".
Applying a textual pattern match to a date is a horrid idea for a number
of reasons, most notably that it's just about certain to break if
someone changes DateStyle. Think about what it is you really want to
do (select a particular year, perhaps?) and see if there's not a
datetime-based operation that does it.
regards, tom lane