Re: How to insert into 2 tables from a view?

Chris Hoover wrote:> Correct sql:
> BEGIN;
>
> CREATE TABLE table1 (
> table1_id SERIAL PRIMARY KEY,
> table1_field1 TEXT
> );
>
> CREATE TABLE table2 (
> table1_id INTEGER NOT NULL PRIMARY KEY REFERENCES table1(table1_id)
> ON DELETE CASCADE,
> table2_field1 TEXT
> );
>
> CREATE VIEW orig_table AS
> SELECT table1_id, table1_field1, table2_field1
> FROM table1
> JOIN table2 USING (table1_id);
>
> CREATE FUNCTION orig_table_insert(in_table1_id integer, in_table1_field1
> text, in_table2_field1 text)
> RETURNS SETOF orig_table
> LANGUAGE plpgsql
> AS
> $BODY$
> DECLARE
> v_table1_id table1.table1_id%TYPE;
> BEGIN
> INSERT INTO table1 (
> table1_id, table1_field1
> ) VALUES (
> COALESCE(in_table1_id, NEXTVAL('table1_table1_id_seq')),
> in_table1_field1
> )
> RETURNING table1_id
> INTO v_table1_id;
>
> INSERT INTO table2 (
> table1_id, table2_field1
> ) VALUES (
> v_table1_id, in_table2_field1
> );
>
> RETURN QUERY SELECT table1_id, table1_field1, table2_field1
> FROM orig_table
> WHERE table1_id = v_table1_id;
>
> END;
> $BODY$;
>
> CREATE RULE orig_table_insert_rule AS
> ON INSERT
> TO orig_table
> DO INSTEAD
> SELECT orig_table_insert(NEW.table1_id, NEW.table1_field1,
> NEW.table2_field1);
>
> COMMIT;
>
> Problem query:
> insert into orig_table (table1_field1, table2_field1) values ('field1',
> 'field2') returning table1_id;
>
>
> On Tue, Dec 23, 2014 at 1:46 PM, Chris Hoover <revoohc(at)gmail(dot)com
> <mailto:revoohc(at)gmail(dot)com>> wrote:
>
> Hi,
>
> I am having a problem trying to figure out.
>
> I have two tables behind a view and am trying to figure out how to
> create the correct insert rule so that inserting into the view is
> redirected to the two tables. I thought I had is solved using a
> stored procedure, but doing an insert into view ... returning id
> causes the insert to fail with this error:
>

CREATE TABLE table1 (
table1_id SERIAL PRIMARY KEY,
table1_field1 TEXT
);

CREATE TABLE table2 (
table1_id INTEGER NOT NULL PRIMARY KEY REFERENCES table1(table1_id)
ON DELETE CASCADE,
table2_field1 TEXT
);

CREATE VIEW orig_table AS
SELECT table1_id, table1_field1, table2_field1
FROM table1
JOIN table2 USING (table1_id);

CREATE RULE orig_table_insert_rule AS
ON INSERT
TO orig_table
DO INSTEAD
(
INSERT INTO table1 (table1_field1) VALUES (NEW.table1_field1);
INSERT INTO table2 (table1_id, table2_field1) VALUES
(CURRVAL('table1_table1_id_seq'), new.table2_field1);
);

COMMIT;

INSERT INTO orig_table (table1_field1, table2_field1) VALUES ('The value
for table 1, field 1', 'The value for table 2, field1');
SELECT * FROM table1;
SELECT * FROM table2;
SELECT * FROM orig_table;