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From: "Pavel PaJaSoft Janousek" <janousek@fonet.cz>
To: "Dave Broudy" <shaggy@broudy.net>
Cc: "PgSQL Interfaces" <pgsql-interfaces@postgresql.org>
Subject: Re: [INTERFACES] ecpg cursors and scope
Date: Wed, 21 Apr 1999 12:36:59 +0200
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>A) In seperate functions:
>
>func1() {
>  exec sql declare test_cur for ...
>}
>func2() {
>  exec sql declare test_cur for ... /* same or different sql */
>}
>
>B) In an if:
>
>if(...) {
>  exec sql declare test_cur for ...
>} else {
>  exec sql declare test_cur for ... /* same or different sql */
>}
>
>These both yield "cursor test_cur already defined"


    I try this too, but I got the same error... )ECPG distributed with
PostgreSQL 6.4.2)

    I think, that principly is correct contructions like this:

    if (condition)
    {
        exec sql declare cur cursor for select count (*) from tmp where
col1 - :num;
    }
    else
    {
        exec sql declare cur cursor for select count (*) from tmp;
    }
    exec sql whenever not found continue;
    exec sql open cur;
    exec sql whenever not found do break;
    while (1)
    {
        exec sql fetch in cur into :num1;
    }

    But this isn't allow too, because second exec sql declare.... - in this
line I got the same message...:-(

    One time I wrote this exec<space><space>sql - and ECPG say parse error
too, but I forgot, that bad was only this two spaces between 'exec' and
'sql'....

    Next, some 'interesting' situations I got when I use exec sql
whenever... - scope for this is not as the program running, but as the
source is parsing... - this is ...'-)

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Pavel Janousek (PaJaSoft)                              FoNet, spol. s r. o.
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