Re: PL/PGSQL + inserts+updates+limit - Postgres 9.3

On 06/01/2016 10:04 PM, Patrick Baker wrote:
>
>
> I maybe be missing it, but I see no LIMIT in the function.
>
> I do see OFFSET and it looks backwards to me?:
>
> || $1 ||' offset '||
>
> https://www.postgresql.org/docs/9.5/static/sql-select.html
>
> LIMIT Clause
>
> The LIMIT clause consists of two independent sub-clauses:
>
> LIMIT { count | ALL }
> OFFSET start
>
> Also I not sure what offset_num is supposed to do, it is declared
> but not used?
>
>
> Yep.. it's declared but it's not used..
>
> Hmm.. interesting that about the LIMIT clause
> However.. I had to changed the function...
>
> Here is the new one:
>
> CREATE or REPLACE FUNCTION function_data_1(rows integer)
>
> RETURNS INTEGER AS $$
>
>
> declare
>
> completed integer;
>
> offset_num integer;
>
> crtRow record;
>
>
> BEGIN
>
> offset_num = 0;
>
>
> INSERT INTO table2_y_b (note_id, size, file_id, full_path)
>
> (
>
> SELECT
>
> t1.note_id,
>
> t1.size,
>
> t1.file_id,
>
> t1.full_path
>
> FROM
>
> table1_n_b t1
>
> JOIN
>
> table3_n_b t3 ON t3.file_id = t1.file_id
>
> );
>
>
> UPDATE table2_y_b t2 SET segment_data =
>
> (
>
> SELECT
>
> o1.data
>
> FROM
>
> original_table1_b o1
>
> JOIN
>
> table3_n_b t3 ON t3.file_id = o1.file_id
>
> WHERE
>
> t2.migrated = 0
>
> AND
>
> t2.file_id = o1.file_id
>
> );
>
>
> UPDATE table2_y_b SET migrated = 1 WHERE file_id =
> crtRow.file_id AND migrated = 0;
>
>
> UPDATE original_table1_b SET data = NULL WHERE file_id =
> crtRow.file_id;
>
>
> END
>
>
> $$ language 'plpgsql';
>
>
> It's all working, except the LIMIT... if possible can you please give
> me an example of that LIMIT in some of those queries?

I do not what you are trying to LIMIT/OFFSET, so I have no idea where to
place the LIMIT/OFFSET.

Maybe an example query showing what you are trying to do will help?

>
> Thanks

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com