Oracle PL/SQL: Dump query result into file
Unless it is really necessary, I would not use a procedure.
If you call the script using SQLPlus, just put the following into your test.sql
(the SET
s are from SQLPlus FAQ to remove noise):
SET ECHO OFFSET NEWPAGE 0SET SPACE 0SET PAGESIZE 0SET FEEDBACK OFFSET HEADING OFFSET TRIMSPOOL ONSET TAB OFFSelect owner || ';' || object_nameFrom all_objects;QUIT
and redirect output to a file (test.txt
):
sqlplus user/passwd@instance @ test.sql > test.txt
If you really need to do stuff in PL/SQL, consider putting that into a function and call it per record:
Create Or Replace Function calculate_my_row( in_some_data In Varchar2 ) Return Varchar2AsBegin Return in_some_data || 'something-complicated';End calculate_my_row;
Call:
Select owner || ';' || calculate_my_row( object_name )From all_objects;
Performance could suffer, but it should work. Make sure, that what you try can't be done in pure SQL
, though.
Reading your comment I think that Analytic Function Lag
is what you need.
This example appends *
in case the value of val
has changed:
With x As ( Select 1 id, 'A' val FROM dualUnion Select 2 id, 'A' val FROM dualUnion Select 3 id, 'B' val FROM dualUnion Select 4 id, 'B' val FROM dual)--# End of test-dataSelect id, val, Case When ( val <> prev_val Or prev_val Is Null ) Then '*' End As changedFrom ( Select id, val, Lag( val ) Over ( Order By id ) As prev_val From x)Order By id
Returns
ID V C---------- - - 1 A * 2 A 3 B * 4 B
If every line of your output is the result of an operation on one row in the table, then a stored function, combined with Peter Lang's answer, can do what you need.
create function create_string(p_foobar foobar%rowtype) return varchar2 asbegin do_some_stuff(p_foobar); return p_foobar.foo || ';' ||p_foobar.bar;end;/
If it is more complicated than that, maybe you can use a pipelined table function
create type varchar_array as table of varchar2(2000)/create function output_pipelined return varchar_array PIPELINED as v_line varchar2(2000);begin for r_foobar in (select * from foobar) loop v_line := create_string(r_foobar); pipe row(v_line); end loop; return;end;/ select * from TABLE(output_pipelined);