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POUsing bind variables in SQL Plus with more than one row returned?
 

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  1. POUsing bind variables in SQL Plus with more than one row returned?
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    <p>This is a stupid problem, but I can't seem to get around it. I have a query that's causing trouble in an OCI program, so I want to run it manually in SQL*Plus to check if there is any difference there. This is the query:</p> <pre><code>select e.label as doc_name, e.url, i.item_id, 'multi' as form_type from cr_items i, cr_extlinks e where i.parent_id = :comment_id and e.extlink_id = i.item_id UNION select null as doc_name, utl_raw.cast_to_varchar2(DBMS_LOB.SUBSTR(r.content, 2000, 1)) as url, r.item_id, 'single' as form_type from cr_revisions r where r.revision_id = ( select content_item.get_latest_revision(:comment_id) from dual); end; </code></pre> <p>I wanted to bind the comment_id to the value 3052753, so I did the following:</p> <pre><code> DECLARE comment_id number := 3052753; BEGIN select e.label , e.url, i.item_id, 'multi' from cr_items i, cr_extlinks e where i.parent_id = :comment_id and e.extlink_id = i.item_id UNION select null , utl_raw.cast_to_varchar2(DBMS_LOB.SUBSTR(r.content, 2000, 1)) as url, r.item_id, 'single' from cr_revisions r where r.revision_id = ( select content_item.get_latest_revision(:comment_id) from dual); END; / </code></pre> <p>which gives this error:</p> <pre><code>ORA-06550: line 4, column 1: PLS-00428: an INTO clause is expected in this SELECT statement </code></pre> <p>Now, I'm already unhappy because I don't want to be radically changing this query, but anyway I forge ahead and come up with this (INTO and UNIONs don't go together so smoothly):</p> <pre><code>DECLARE comment_id number := 3052753; x_label VARCHAR2(50); x_url VARCHAR2(500); x_item number; x_thing VARCHAR2(50); BEGIN select label, url, item_id, thing into x_label, x_url, x_item, x_thing from ( select e.label , e.url, i.item_id, 'multi' as thing from cr_items i, cr_extlinks e where i.parent_id = :comment_id and e.extlink_id = i.item_id UNION select null , utl_raw.cast_to_varchar2(DBMS_LOB.SUBSTR(r.content, 2000, 1)) as url, r.item_id, 'single' as thing from cr_revisions r where r.revision_id = ( select content_item.get_latest_revision(:comment_id) from dual)) ; END; / </code></pre> <p>but now, of course because I'm returning more than 1 row, I get the utterly predictable</p> <pre><code>ORA-01422: exact fetch returns more than requested number of rows </code></pre> <p>Now, I can go ahead and start using cursors etc, but my little query is getting more and more distorted from its original self. All I wanted to do was to check if the query ran ok with that value of comment_id. Of course, I can just hardcode the comment_id into the query, and that works fine. But it also works fine in the OCI so I'm to reproduce in SQL*PLus the issue with bind variables that I'm seeing in the OCI code. But why is it such a struggle to do this in SQL*Plus? Have I missed something really obvious?</p> <p>Database is Oracle 10.2.0.1.0 - 64bit running on Red Hat Enterprise Linux ES release 4 (Nahant Update 8)</p>
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