DBMS_METADATA.GET_DDL inside the pl/sql procedure

We have a requirement to drop certain materialized view and need to recreate based on certain condition inside the
pl/sql procedure.i am using the dbms_metadata to get the Mv ddls.
var1 := 'SELECT DBMS_METADATA.GET_DDL('MATERIALIZED_VIEW,'MV_NAME','OWNER')'|| 'from dual' || ';' ;
dbms_output.put_line(var1);
But i am unable to get the create ddl syntax in var1.
Can anyone help me on this

Hi Deepu,
you are not helping us too much. You information are coming drop by drop.
Anyway, I don't have a materialized view but I have tried with a table.
Here is my test and output (what I expect you too show us too):
First test using normal SELECT FROM DUAL:
SET LONG 2000000
SET HEAD OFF
SET ECHO ON
SELECT DBMS_METADATA.get_ddl ('TABLE', 'ALERT_QT', 'SYS') FROM DUAL;
Output:
SQL>
SQL> SELECT DBMS_METADATA.get_ddl ('TABLE', 'ALERT_QT', 'SYS') FROM DUAL;
CREATE TABLE "SYS"."ALERT_QT"
   (    "Q_NAME" VARCHAR2(30),
        "MSGID" RAW(16),
        "CORRID" VARCHAR2(128),
        "PRIORITY" NUMBER,
        "STATE" NUMBER,
        "DELAY" TIMESTAMP (6),
        "EXPIRATION" NUMBER,
        "TIME_MANAGER_INFO" TIMESTAMP (6),
        "LOCAL_ORDER_NO" NUMBER,
        "CHAIN_NO" NUMBER,
        "CSCN" NUMBER,
        "DSCN" NUMBER,
        "ENQ_TIME" TIMESTAMP (6),
        "ENQ_UID" VARCHAR2(30),
        "ENQ_TID" VARCHAR2(30),
        "DEQ_TIME" TIMESTAMP (6),
        "DEQ_UID" VARCHAR2(30),
        "DEQ_TID" VARCHAR2(30),
        "RETRY_COUNT" NUMBER,
        "EXCEPTION_QSCHEMA" VARCHAR2(30),
        "EXCEPTION_QUEUE" VARCHAR2(30),
        "STEP_NO" NUMBER,
        "RECIPIENT_KEY" NUMBER,
        "DEQUEUE_MSGID" RAW(16),
        "SENDER_NAME" VARCHAR2(30),
        "SENDER_ADDRESS" VARCHAR2(1024),
        "SENDER_PROTOCOL" NUMBER,
        "USER_DATA" "SYS"."ALERT_TYPE" ,
        "USER_PROP" "SYS"."ANYDATA" ,
         PRIMARY KEY ("MSGID")
USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
TABLESPACE "SYSAUX" ENABLE
   ) USAGE QUEUE PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGIN
G
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
TABLESPACE "SYSAUX"
OPAQUE TYPE "USER_PROP" STORE AS LOB (
ENABLE STORAGE IN ROW CHUNK 8192 PCTVERSION 10
CACHE
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT))
{code}
Now with the procedure storing in CLOB variable
{code:sql}
SET SERVEROUTPUT ON SIZE UNLIMITED
SET LIN 5000
SET LONG 20000000
SET ECHO ON
DECLARE
   l_clob         CLOB;
BEGIN
   l_clob := DBMS_METADATA.get_ddl ('TABLE', 'ALERT_QT', 'SYS');
   DBMS_OUTPUT.put_line (l_clob);
END;
Output:
SQL>
SQL> DECLARE
2     l_clob         CLOB;
3 BEGIN
4     l_clob := DBMS_METADATA.get_ddl ('TABLE', 'ALERT_QT', 'SYS');
5     DBMS_OUTPUT.put_line (l_clob);
6 END;
7 /
CREATE TABLE "SYS"."ALERT_QT"
   (    "Q_NAME" VARCHAR2(30),
        "MSGID" RAW(16),
        "CORRID" VARCHAR2(128),
        "PRIORITY" NUMBER,
        "STATE" NUMBER,
        "DELAY" TIMESTAMP (6),
        "EXPIRATION" NUMBER,
        "TIME_MANAGER_INFO" TIMESTAMP (6),
        "LOCAL_ORDER_NO" NUMBER,
        "CHAIN_NO" NUMBER,
        "CSCN" NUMBER,
        "DSCN" NUMBER,
        "ENQ_TIME" TIMESTAMP (6),
        "ENQ_UID" VARCHAR2(30),
        "ENQ_TID" VARCHAR2(30),
        "DEQ_TIME" TIMESTAMP (6),
        "DEQ_UID" VARCHAR2(30),
        "DEQ_TID" VARCHAR2(30),
        "RETRY_COUNT" NUMBER,
        "EXCEPTION_QSCHEMA" VARCHAR2(30),
        "EXCEPTION_QUEUE" VARCHAR2(30),
        "STEP_NO" NUMBER,
        "RECIPIENT_KEY" NUMBER,
        "DEQUEUE_MSGID" RAW(16),
        "SENDER_NAME" VARCHAR2(30),
        "SENDER_ADDRESS" VARCHAR2(1024),
        "SENDER_PROTOCOL" NUMBER,
        "USER_DATA" "SYS"."ALERT_TYPE" ,
        "USER_PROP" "SYS"."ANYDATA" ,
         PRIMARY KEY ("MSGID")
USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
TABLESPACE "SYSAUX" ENABLE
   ) USAGE QUEUE PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
TABLESPACE "SYSAUX"
OPAQUE TYPE "USER_PROP" STORE AS LOB (
ENABLE STORAGE IN ROW CHUNK 8192 PCTVERSION 10
CACHE
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT))
{code}
It should be nice if you could post your tests too if they are not working.
Regards.
Al

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Edited by: user10248070 on Mar 2, 2010 3:54 AM

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Regards Pete

I found a simple solution that works but I would like to hear if anybody can see any problems with this approach:
I create a dummy table with one row. I create a partner link that polls the dummy table every 5 minutes. The operation on the table is an update, but the Read value and Unread value are the same!
Every 5 minutes BPEL kicks of a process that calls a PL/SQL procedure etc. There will always be a row in the dummy table and as long as my polling interval is longer than the processing time of the flow I will never have more than one process in-flight at a time. This should ensure that the solution is robust.
Regards Pete
Message was edited by:
Peter Lorenzen
Message was edited by:
Peter Lorenzen

DBMS_METADATA.GET_DDL inside the pl/sql procedure

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