Thread: Creating a view: ERROR: rules on SELECT must have action INSTEAD SELECT

I get the following error when trying to create a view with the
following trivial example.

SQL error:
ERROR:  rules on SELECT must have action INSTEAD SELECT

In statement:
CREATE VIEW "nutrition"."test_view" AS SELECT 2 as two, 3 as three
INTO TEMP temp_table; SELECT *,two+three as five FROM temp_table;

If I rewrite the statement to maybe make more sense:

SQL error:

ERROR:  temporary tables cannot specify a schema name

In statement:

SELECT 2 as two, 3 as three INTO TEMP nutrition.temp_table; CREATE
VIEW "nutrition.test_view" AS  SELECT *,two+three as five FROM
nutrition.temp_table;

So the question is how do I use the powerful feature of temporary
tables with views? And if this is not possible, how do I do something
similar for optimization reasons (ie pretend "two+three as five" is
some very expensive operation and "two" and "three" were also
expensive operations)?

David,

You cannot mix CREATE TEMP TABLE and SELECT in one CREATE VIEW statement

I really recommend looking at WITH statement
http://www.postgresql.org/docs/8.4/static/queries-with.html

Adjusting to your example:

CREATE VIEW test_view AS WITH q AS ( SELECT 2 as two, 3 as three )
SELECT *, two+three as five FROM q;



2010/3/19 David Waddy <david@littleriver.ca>:
> I get the following error when trying to create a view with the
> following trivial example.
>
> SQL error:
> ERROR:  rules on SELECT must have action INSTEAD SELECT
>
> In statement:
> CREATE VIEW "nutrition"."test_view" AS SELECT 2 as two, 3 as three
> INTO TEMP temp_table; SELECT *,two+three as five FROM temp_table;
>
> If I rewrite the statement to maybe make more sense:
>
> SQL error:
>
> ERROR:  temporary tables cannot specify a schema name
>
> In statement:
>
> SELECT 2 as two, 3 as three INTO TEMP nutrition.temp_table; CREATE
> VIEW "nutrition.test_view" AS  SELECT *,two+three as five FROM
> nutrition.temp_table;
>
> So the question is how do I use the powerful feature of temporary
> tables with views? And if this is not possible, how do I do something
> similar for optimization reasons (ie pretend "two+three as five" is
> some very expensive operation and "two" and "three" were also
> expensive operations)?
>
> --
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>



--
Filip Rembiałkowski
JID,mailto:filip.rembialkowski@gmail.com
http://filip.rembialkowski.net/