Re: PL/SQL Loop performance

If your on 8i, search on BULK COLLECT in the online docs. Another good resource is Stephen Fuerestein's book on PL/SQL

In article <94nn2t$253$1_at_nnrp1.deja.com>,   eric_levin_at_my-deja.com wrote:
> Do you have any syntax examples how to iterrate over a nested table
> using bulkcopy.
>
> In article <94nj8v$u88$1_at_nnrp1.deja.com>,
> jdarrah_co_at_my-deja.com wrote:
> > if you are running 8.1.5 or higher you can BULK COLLECT the data
 into
> > varrays or nested tables then iterate over the array.
> >
> > In article <94ndl1$ojn$1_at_nnrp1.deja.com>,
> > eric_levin_at_my-deja.com wrote:
> > > I am writing a procedure that loops through symbols and their
 phrases
 and
> > > prints them to an output file. One symbol and many phrases on a
 line.
 The
> > > cursors run quickly but the entire procedure takes 40 seconds. Is
 their a way
> > > to improve the speed. The procedure can be seen below.
> > >
> > > CREATE OR REPLACE PROCEDURE symbols_gram(login2 varchar2)
> > > AS
> > > --Variables to input into the file
> > > v_sym_num lists.symbol.sym_num%TYPE;
> > > v_ticker lists.symbol.ticker%TYPE;
> > > v_class lists.symbol.class%TYPE;
> > > v_exchange lists.symbol.sym_exchange%TYPE;
> > > v_sym_num2 lists.symbol_phrase.sym_num%TYPE;
> > > v_symbol_phrase lists.symbol_phrase.phrase%TYPE;
> > > v_sym_num_bind lists.symbol.sym_num%TYPE;
> > > --File Handle
> > > v_filehandle UTL_FILE.FILE_TYPE;
> > > --Cursors
> > > CURSOR c_symbol IS
> > > select distinct s.sym_num, s.ticker, s.class, s.sym_exchange
> > > from
> > > lists.symbol s,
> > > lists.symbol_phrase sp,
> > > lists.phrase_user_xref xref,
> > > lists.umevoice_user u
> > > where
> > > u.login = login2
> > > and u.user_num = xref.user_num
> > > and xref.sym_phrase_num = sp.sym_phrase_num
> > > and sp.sym_num = s.sym_num;
> > >
> > > CURSOR c_phrase IS select sp.sym_num, sp.phrase from
> > > lists.symbol_phrase sp, lists.phrase_user_xref xref,
> > > lists.umevoice_user u where u.login = login2 and
 sp.sym_num =
> > > v_sym_num_bind and u.user_num = xref.user_num and
> > > xref.sym_phrase_num = sp.sym_phrase_num; BEGIN --Open file to
 write  

> > > v_filehandle := UTL_FILE.FOPEN

 ('c:\grammars','symbols.gram','w'); --
 Static
> > > Data before first loop UTL_FILE.PUT_LINE
 (v_filehandle,'grammar
> > > com.umevoice.uvautex.'||login2||'.symbols;');
> > > UTL_FILE.PUT_LINE(v_filehandle,'<uv_new_symbols>=( ('); --Loop
 through
> > > c_symbol cursor OPEN c_symbol; LOOP
 

> > > FETCH c_symbol INTO v_sym_num, v_ticker, v_class, v_exchange;
 

> > > EXIT WHEN c_symbol%NOTFOUND; IF c_symbol%
 ROWCOUNT =
> > > 1 THEN
> > > UTL_FILE.PUT(v_filehandle,'<'||lower(v_ticker)
> > ||v_class||v_exchange||'>');
> > > ELSIF c_symbol%FOUND THEN
 

> > > UTL_FILE.PUT(v_filehandle,' |
> > > <'||lower(v_ticker)||v_class||v_exchange||'>');
 

> > > ELSE EXIT; END IF;
 
> > > UTL_FILE.PUT_LINE(v_filehandle,null); END LOOP;
> > > CLOSE c_symbol; UTL_FILE.PUT_LINE(v_filehandle,') {$TICKER})');
> > > --static data before second loop UTL_FILE.PUT_LINE
 (v_filehandle,'{');
> > > UTL_FILE.PUT_LINE(v_filehandle,'symbolAction=setsymbol;');
> > > UTL_FILE.PUT_LINE(v_filehandle,'symbolValue =$TICKER.SYM;');
> > > UTL_FILE.PUT_LINE(v_filehandle,'};'); --Loop through table and
 input
 into
> > > file OPEN c_symbol; LOOP FETCH
 c_symbol
 INTO
> > > v_sym_num, v_ticker, v_class, v_exchange; EXIT WHEN
> > > c_symbol%NOTFOUND;
> > > UTL_FILE.PUT(v_filehandle,'<'||lower(v_ticker)
> > ||v_class||v_exchange||'>=(');
> > > v_sym_num_bind := v_sym_num; OPEN
> > > c_phrase; LOOP FETCH

 c_phrase
> > > INTO v_sym_num2, v_symbol_phrase; EXIT WHEN
> > > c_phrase%NOTFOUND; IF c_phrase%ROWCOUNT = 1 THEN
 

> > > UTL_FILE.PUT(v_filehandle,v_symbol_phrase);
 

> > > ELSE UTL_FILE.PUT(v_filehandle,' | '||v_symbol_phrase);
 

> > > END IF; END LOOP;
 
> > > CLOSE c_phrase;
> > > UTL_FILE.PUT_LINE(v_filehandle,')');
> > > UTL_FILE.PUT_LINE(v_filehandle,'{');
> > >
> > > UTL_FILE.PUT_LINE

 (v_filehandle,'SYM='||v_ticker||':'||v_class||':'||v_exchange||';');
> > > UTL_FILE.PUT_LINE(v_filehandle,'};');
> > > END LOOP;
> > >
> > > CLOSE c_symbol;
> > > --Close file
> > > UTL_FILE.FCLOSE(v_filehandle);
> > > --Error Messages
> > > EXCEPTION
> > > WHEN OTHERS THEN
> > > DBMS_OUTPUT.PUT_LINE('ERROR '||to_char(SQLCODE)
> > ||SQLERRM);
> > > NULL;
> > > END;
> > > /
> > >
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> > >
> >
> > Sent via Deja.com
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> >
>
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Sent via Deja.com
http://www.deja.com/ Received on Wed Jan 24 2001 - 18:31:25 CST