Parsing condition out of a string

Hi,
If I have a string, for example test := 'length(x) > 10';, is it then possible to use it in a condition? Like:
if test = true then
where oracle should see: if length(x) > 10 = true then
thanks

<BLOCKQUOTE><font size="1" face="Verdana, Arial, Helvetica">quote:</font><HR>Originally posted by Freek D ([email protected]):
Hi,
If I have a string, for example test := 'length(x) > 10';, is it then possible to use it in a condition? Like:
if test = true then
where oracle should see: if length(x) > 10 = true then
thanks<HR></BLOCKQUOTE>
Yes, it's possible, by passing the whole command to the DBMS_SQL package.
Hope this will help...
Thomas.
Thomas Devalli
KSI Int'l
[EMAIL][email protected][EMAIL]
www.ksi.be
null

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BNF changes
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begin
2 recreate_dynamic_views(to_date('01/01/2008','dd/mm/yyyy'),
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4 to_date('01/12/2006','dd/mm/yyyy')
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ORA-06512: at "SYS.DBMS_SQL", line 26
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CREATE OR REPLACE procedure recreate_dynamic_views(p_prod_from_month_include date,
p_prod_until_month_include date,
p_hist_until_month_include date)
is
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CURSOR c (v_instance_type VARCHAR2)
IS
SELECT view_name, view_text, month_exp, instance_type, start_from,
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to_date(p_prod_from_month_include,'DD/MM/YYYY')
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to_date(START_FROM,'DD/MM/YYYY')
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and view_name = 'V_MY_CALLS';
v_str_header VARCHAR2 (32000);
v_str VARCHAR2 (32000);
v1 VARCHAR2 (4);
v_month VARCHAR2 (200);
v_instance VARCHAR2 (20);
v_instance_type VARCHAR2 (20);
v_start_from VARCHAR2 (10);
v_num_of_month NUMBER;
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create_stmt DBMS_SQL.varchar2a;
ub NUMBER := 0;
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INTO v_instance
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dbms_output.put_line('View '||c_rec.view_name||' Created');
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dbms_output.put_line('c_rec.hist_num_of_months='||c_rec.hist_num_of_months);
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v_its_new_view := 'N';
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create_stmt (ub) := v_str;
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v_month := ' select to_char(add_months(:start_date, '
|| TO_NUMBER (i-1 )
|| '),'''
|| c_rec.month_exp
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v_str := 'UNION ALL ' || CHR (10) || c_rec.view_text || v1 || CHR (10);
ub := ub + 1;
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v_str := 'UNION ALL ' || CHR (10) || c_rec.union_with || CHR (10);
ub := ub + 1;
create_stmt (ub) := v_str;
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DBMS_SQL.parse (cursor_id, create_stmt, 1, ub, TRUE, DBMS_SQL.native);
ret_val := DBMS_SQL.EXECUTE (cursor_id);
dbms_output.put_line('View '||c_rec.view_name||' Created');
END LOOP;
END IF;
END;

user546852 wrote:
Hi,
I dont think its possible in case when the string is more that 32K.
ThanksIt is possible to create a SQL statement larger than 32K.
Firstly, you need take your statement (easiest if it's built up in a CLOB), the split it up into the DBMS_SQL.VARCHAR2S array structure (_not_ the VARCHAR2A structure), and then execute that as your statement.
Example:
SQL> ed
Wrote file afiedt.buf
1 declare
2    v_large_sql CLOB;
3    v_num        NUMBER := 0;
4    v_upperbound NUMBER;
5    v_sql        DBMS_SQL.VARCHAR2S;
6    v_cur        INTEGER;
7    v_ret        NUMBER;
8 begin
9    -- Build a very large SQL statement in the CLOB
10    LOOP
11      IF v_num = 0 THEN
12        v_large_sql := 'CREATE VIEW vw_tmp AS SELECT ''The number of this row is : '||to_char(v_num,'fm0999999')||''' as col1 FROM DUAL';
13      ELSE
14        v_large_sql := v_large_sql || ' UNION ALL SELECT ''The number of this row is : '||to_char(v_num,'fm0999999')||''' as col1 FROM DUAL';
15      END IF;
16      v_num := v_num + 1;
17      EXIT WHEN DBMS_LOB.GETLENGTH(v_large_sql) > 40000 OR v_num > 800;
18    END LOOP;
19    DBMS_OUTPUT.PUT_LINE('Length:'||DBMS_LOB.GETLENGTH(v_large_sql));
20    DBMS_OUTPUT.PUT_LINE('Num:'||v_num);
21    --
22    -- Now split that large SQL statement into chunks of 256 characters and put in VARCHAR2S array
23    v_upperbound := CEIL(DBMS_LOB.GETLENGTH(v_large_sql)/256);
24    FOR i IN 1..v_upperbound
25    LOOP
26      v_sql(i) := DBMS_LOB.SUBSTR(v_large_sql
27                                 ,256 -- amount
28                                 ,((i-1)*256)+1 -- offset
29                                 );
30    END LOOP;
31    --
32    -- Now parse and execute the SQL statement
33    v_cur := DBMS_SQL.OPEN_CURSOR;
34    DBMS_SQL.PARSE(v_cur, v_sql, 1, v_upperbound, FALSE, DBMS_SQL.NATIVE);
35    v_ret := DBMS_SQL.EXECUTE(v_cur);
36    DBMS_OUTPUT.PUT_LINE('View Created');
37* end;
SQL> /
Length:40015
Num:548
View Created
PL/SQL procedure successfully completed.
SQL> select count(*) from vw_tmp;
COUNT(*)
       548
SQL> select * from vw_tmp where rownum <= 10;
COL1
The number of this row is : 0000000
The number of this row is : 0000001
The number of this row is : 0000002
The number of this row is : 0000003
The number of this row is : 0000004
The number of this row is : 0000005
The number of this row is : 0000006
The number of this row is : 0000007
The number of this row is : 0000008
The number of this row is : 0000009
10 rows selected.
SQL>

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Below you can see what I have made :
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Could someone help me please ?
It shouldn't even compile.
This method
public void istGueltigerBezeichner()
String s3 = String s3;
boolean b = s3.regionMatches( 1, "_", 1, 1 );
}1) is never called,
2) should return a boolean
3) should accept the string you are testing as a parameter
4) should be redone using a different method of String
private boolean istGueltigerBezeichner(String str)
if(str == null)
return false;
return "_".equals(str.substring(0,1));
}Then call this method from with you loop, before your println statement
~Tim
Message was edited by:
SomeoneElse

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@Stateless()
plublic class ..Part of the exception that I think is the clue :
...33 more Caused by: javax.xml.bind.UnmarshalException - with linked exception: [javax.xml.bind.UnmarshalException: Unable to create an instance of aem.adservices.dfp.ws.InputStream - with linked exception: [java.lang.InstantiationException]] at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.handleStreamException(UnmarshallerImpl.java:425) at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:362) at com.sun.xml.bind.v2.runtime.BridgeImpl.unmarshal(BridgeImpl.java:120) at com.sun.xml.bind.api.Bridge.unmarshal(Bridge.java:233) at com.sun.xml.ws.client.sei.ResponseBuilder$DocLit.readResponse(ResponseBuilder.java:547) at com.sun.xml.ws.client.sei.SyncMethodHandler.invoke(SyncMethodHandler.java:121) ...So I don't think it was enough to just include the annotations to be able to return the InputStream. Can anyone please help?
Many thanks

Parsing condition out of a string

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