On Tue, 17 Sep 2013 10:59:43 -0400
Juan Daniel Santana Rodés <jdsant...@estudiantes.uci.cu> wrote:
> I've been studying and I found that there EXECUTE but to use it, first
> you should have used PREPARE, and in this case the values of the
> parameters are already made inquiries.
> For example the execution of the function would be something like ...
>
> select compare('select * from table1', 'select * from table2');
>
> For this case the result is false, then the queries are executed on
> different tables.
If you create a table with:
CREATE TABLE comp
(
result1 : hstore,
result2 : hstore
);
insert in it the rows from selects:
INSERT INTO comp(result1, result2)
(SELECT * FROM table1, SELECT * FROM table2);
Substitute (SELECT * FROM table, SELECT * FROM table2) with your queries, store
the result of the queries on table1 and table2 tables or use a WITH in the
INSERT.
you can get the differences between both queries using '-' hstore operator:
SELECT (result1 - result2) as LEFT, (result2 - result1) as RIGHT FROM comp;
Or simulating an equal instruction:
SELECT (COUNT(result1 - result2)+COUNT(result2 - result1)=0) FROM comp; -- Not
sure about this one because uses COUNT on a hstore data column.
> Thanks in advance.
> Best regards from Cuba.
--- ---
Eduardo Morras <emorr...@yahoo.es>
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