Is there a way to build a query based on data in a table? - Mailing list pgsql-sql

From Herouth Maoz
Subject Is there a way to build a query based on data in a table?
Date
Msg-id DA77DE73-13B8-4FE2-AB3B-C76449ACB56A@unicell.co.il
Whole thread Raw
Responses Re: Is there a way to build a query based on data in a table?  (Brice André <brice@famille-andre.be>)
List pgsql-sql
Hello.

I want to run an automatic archiving SQL script, that looks at a meta-table containing data about the tables to be archived.

Basically, suppose I have this data in the meta-table:

table_name varchar(100)
datetime_column_name varchar(100)
archive_interval interval

Like this:
public.foo     |   foo_date   |  1 day
schema1.bar    |   bar_time   |  2 day

And for each such table I want to run a query like

INSERT INTO foo__archive
SELECT * FROM foo
WHERE foo_date < timestamp 'today' - interval '1 day'
;

And I want to build this dynamically and run it based on the table above. Is there any way of doing this? I mean, not by doing text manipulation in a programming language?





Herouth

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