Обсуждение: Ocasional problems !!!!
I'm trying to delete all the records or only one record or insert one record in a table but i'm having this message: ERROR: Unable to identify an operator '=' for types 'int4' and 'text' You will have to retype this query using anexplicit cast What's this means ??? Thanks Luis Sousa
> i'm having this message:
> ERROR: Unable to identify an operator '=' for types 'int4' and 'text'
> You will have to retype this query using an explicit cast
Without knowing your schema and query, we can't tell you exactly. But
your query is trying to compare a string to an integer, which you can do
by using an explicit cast. For example,
select text '123' = 123;
will fail, but
select cast((text '123') as integer) = 123;
will succeed.
- Thomas
What is the schema of the table involved and what are the queries you are trying to run? Stephan Szabo sszabo@bigpanda.com On Thu, 14 Dec 2000, Luis Sousa wrote: > I'm trying to delete all the records or only one record or insert one > record in a table but > i'm having this message: > ERROR: Unable to identify an operator '=' for types 'int4' and 'text' > You will have to retype this query using an explicit cast > > What's this means ??? > > Thanks > > Luis Sousa >
I just trying to execute a simple query in a table to delete a simpe record or all of them, like: DELETE * FROM table; I have a schema of more or less 25 tables, that are created using a script. When i'm trying to use that table (and only happens in this table) when created by the script i receive the message below. The most strange is that i droped the table and i created again, maintaining the structure created with the script and i didn't had any problems !!! Best Regards Luis Sousa Stephan Szabo wrote: > What is the schema of the table involved and what are the queries you > are trying to run? > > Stephan Szabo > sszabo@bigpanda.com > > On Thu, 14 Dec 2000, Luis Sousa wrote: > > > I'm trying to delete all the records or only one record or insert one > > record in a table but > > i'm having this message: > > ERROR: Unable to identify an operator '=' for types 'int4' and 'text' > > You will have to retype this query using an explicit cast > > > > What's this means ??? > > > > Thanks > > > > Luis Sousa > >
I received that message working directly in psql. I already send another email, please see. Regards Luis Sousa Thomas Lockhart wrote: > > But i'm not making any compare. > > I just wrote delete from table; and i receive that message. > > Hmm. We will need to know more about your setup, since a simple > > delete from table; > > in psql does not involve *any* comparisons, and should never provoke the > message you are receiving. > > If you think that you are doing something as simple as that, then > perhaps the application you are using is doing extra stuff underneath? > > - Thomas
>>>> But i'm not making any compare.
>>>> I just wrote delete from table; and i receive that message.
>>
>> Hmm. We will need to know more about your setup, since a simple
>>
>> delete from table;
>>
>> in psql does not involve *any* comparisons, and should never provoke the
>> message you are receiving.
Perhaps there is a foreign key constraint, or some such, being invoked
by this command?
regards, tom lane
Did you perhaps have foreign key constraints with an on delete clause defined on a table that referenced this one? Postgres doesn't currently check that the types are comparable before making the constraint. I'm working on adding a check for that now. Or for that matter, any other rules or triggers could do it. On Fri, 15 Dec 2000, Luis Sousa wrote: > I just trying to execute a simple query in a table to delete a simpe record > or all of them, like: > > DELETE * FROM table; > > I have a schema of more or less 25 tables, that are created using a script. > When i'm trying to use that table (and only happens in this table) when > created by the script i receive the message below. > The most strange is that i droped the table and i created again, > maintaining the structure created with the script and i didn't had any > problems !!! > > Best Regards > > Luis Sousa > > > Stephan Szabo wrote: > > > What is the schema of the table involved and what are the queries you > > are trying to run? > > > > Stephan Szabo > > sszabo@bigpanda.com > > > > On Thu, 14 Dec 2000, Luis Sousa wrote: > > > > > I'm trying to delete all the records or only one record or insert one > > > record in a table but > > > i'm having this message: > > > ERROR: Unable to identify an operator '=' for types 'int4' and 'text' > > > You will have to retype this query using an explicit cast > > > > > > What's this means ??? > > > > > > Thanks > > > > > > Luis Sousa > > > >
I really have constraints of foreign keys but not on delete, only on update Stephan Szabo wrote: > Did you perhaps have foreign key constraints with an on delete > clause defined on a table that referenced this one? Postgres doesn't > currently check that the types are comparable before making the > constraint. I'm working on adding a check for that now. > > Or for that matter, any other rules or triggers could do it. > > On Fri, 15 Dec 2000, Luis Sousa wrote: > > > I just trying to execute a simple query in a table to delete a simpe record > > or all of them, like: > > > > DELETE * FROM table; > > > > I have a schema of more or less 25 tables, that are created using a script. > > When i'm trying to use that table (and only happens in this table) when > > created by the script i receive the message below. > > The most strange is that i droped the table and i created again, > > maintaining the structure created with the script and i didn't had any > > problems !!! > > > > Best Regards > > > > Luis Sousa > > > > > > Stephan Szabo wrote: > > > > > What is the schema of the table involved and what are the queries you > > > are trying to run? > > > > > > Stephan Szabo > > > sszabo@bigpanda.com > > > > > > On Thu, 14 Dec 2000, Luis Sousa wrote: > > > > > > > I'm trying to delete all the records or only one record or insert one > > > > record in a table but > > > > i'm having this message: > > > > ERROR: Unable to identify an operator '=' for types 'int4' and 'text' > > > > You will have to retype this query using an explicit cast > > > > > > > > What's this means ??? > > > > > > > > Thanks > > > > > > > > Luis Sousa > > > > > > -- Luis Sousa Tecnico Superior de Informatica Gabinete de Assessoria e Planeamento Universidade do Algarve
Actually, it's not going to matter since all foreign keys have a delete portion (realized after seeing your response) that checks to make sure the one you are deleting is not being referenced. I'm surprised you're not seeing this on inserts into the fk table or on updates to the pk table. What are the types of the columns on both tables? Stephan Szabo sszabo@bigpanda.com On Mon, 18 Dec 2000, Luis Sousa wrote: > I really have constraints of foreign keys but not on delete, only on update > > Stephan Szabo wrote: > > > Did you perhaps have foreign key constraints with an on delete > > clause defined on a table that referenced this one? Postgres doesn't > > currently check that the types are comparable before making the > > constraint. I'm working on adding a check for that now. > > > > Or for that matter, any other rules or triggers could do it. > > > > On Fri, 15 Dec 2000, Luis Sousa wrote: > > > > > I just trying to execute a simple query in a table to delete a simpe record > > > or all of them, like: > > > > > > DELETE * FROM table; > > > > > > I have a schema of more or less 25 tables, that are created using a script. > > > When i'm trying to use that table (and only happens in this table) when > > > created by the script i receive the message below. > > > The most strange is that i droped the table and i created again, > > > maintaining the structure created with the script and i didn't had any > > > problems !!! > > > > > > Best Regards > > > > > > Luis Sousa > > > > > > > > > Stephan Szabo wrote: > > > > > > > What is the schema of the table involved and what are the queries you > > > > are trying to run? > > > > > > > > Stephan Szabo > > > > sszabo@bigpanda.com > > > > > > > > On Thu, 14 Dec 2000, Luis Sousa wrote: > > > > > > > > > I'm trying to delete all the records or only one record or insert one > > > > > record in a table but > > > > > i'm having this message: > > > > > ERROR: Unable to identify an operator '=' for types 'int4' and 'text' > > > > > You will have to retype this query using an explicit cast > > > > > > > > > > What's this means ??? > > > > > > > > > > Thanks > > > > > > > > > > Luis Sousa > > > > > > > > > > -- > Luis Sousa > Tecnico Superior de Informatica > Gabinete de Assessoria e Planeamento > Universidade do Algarve > > >
I think i already discovered what's the problem !! At least the problem is not happening again. It was some problems in some triggers that are implementend in the database. Anyway, i appreciatte all the time that you took with my problem Best Regards Luis Sousa Stephan Szabo wrote: > Actually, it's not going to matter since all foreign keys have a delete > portion (realized after seeing your response) that checks to make sure > the one you are deleting is not being referenced. > I'm surprised you're not seeing this on inserts into the fk table or > on updates to the pk table. What are the types of the columns on > both tables? > > Stephan Szabo > sszabo@bigpanda.com > > On Mon, 18 Dec 2000, Luis Sousa wrote: > > > I really have constraints of foreign keys but not on delete, only on update > > > > Stephan Szabo wrote: > > > > > Did you perhaps have foreign key constraints with an on delete > > > clause defined on a table that referenced this one? Postgres doesn't > > > currently check that the types are comparable before making the > > > constraint. I'm working on adding a check for that now. > > > > > > Or for that matter, any other rules or triggers could do it. > > > > > > On Fri, 15 Dec 2000, Luis Sousa wrote: > > > > > > > I just trying to execute a simple query in a table to delete a simpe record > > > > or all of them, like: > > > > > > > > DELETE * FROM table; > > > > > > > > I have a schema of more or less 25 tables, that are created using a script. > > > > When i'm trying to use that table (and only happens in this table) when > > > > created by the script i receive the message below. > > > > The most strange is that i droped the table and i created again, > > > > maintaining the structure created with the script and i didn't had any > > > > problems !!! > > > > > > > > Best Regards > > > > > > > > Luis Sousa > > > > > > > > > > > > Stephan Szabo wrote: > > > > > > > > > What is the schema of the table involved and what are the queries you > > > > > are trying to run? > > > > > > > > > > Stephan Szabo > > > > > sszabo@bigpanda.com > > > > > > > > > > On Thu, 14 Dec 2000, Luis Sousa wrote: > > > > > > > > > > > I'm trying to delete all the records or only one record or insert one > > > > > > record in a table but > > > > > > i'm having this message: > > > > > > ERROR: Unable to identify an operator '=' for types 'int4' and 'text' > > > > > > You will have to retype this query using an explicit cast > > > > > > > > > > > > What's this means ??? > > > > > > > > > > > > Thanks > > > > > > > > > > > > Luis Sousa > > > > > > > > > > > > > > -- > > Luis Sousa > > Tecnico Superior de Informatica > > Gabinete de Assessoria e Planeamento > > Universidade do Algarve > > > > > > -- Luis Sousa Tecnico Superior de Informatica Gabinete de Assessoria e Planeamento Universidade do Algarve