Dynamic SQL in PL/SQL process
Hi all,
I just found out Dynamic SQL doesn't work in PL/SQL process.
working example using SQL:
declare
retval number;
begin
select count(*) into retval from emp;
:P1_EMP_COUNT := retval;
end;
NOT working example using dynamic SQL:
declare
retval number;
l_sql varchar2(4000);
begin
l_sql := 'select count(*) into retval from emp';
execute immediate l_sql;
:P1_EMP_COUNT := retval;
end;
What have I done wrong? Could anyone please help?? :)
Chris
Hi Jarola,
Actually, your version works just as well. I had a typo in my code so I got a typo... Thank you very much. Now I got 2 version of codes that works... Sorry about the fact the Since I mark the other suggestion as "Correct", I can only mark your post as "Helpful" but yours is actually "Correct" just as well... How can I somehow get you the credit you deserved? Please let me know, Okay? Thanks again...
Chris :)
Similar Messages
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Does anyone have or know where I can find sample code showing
how to process dynamic sql statements? I am using Windows NT and
Oracle 8.1.5. I have developed a fairly good API for my
application but only using static SQL. I now wish to advance to
using dynamic SQl processing. Any and all help with this would
be very much appreciated.
Thanks in advanceCan you tell me exactly where are you going to use the Dynamic SQL method 4 ? so that i can help you in using the method.
Thiagu. -
Problem setting a hidden item value when button clicked with dynamic action or pl/sql process
Apex 4.1
Oracle 11g
I have a page that consists of a main region and several sub regions. I have a pl/sql process in After Header SET_DISPLAY(:P400_DISPLAY :='MAIN';)
Three subregions have a contional display where P400_DISPLAY = STORE. This works in hiding the sub regions.
Now I want to change the P400_DISPLAY value to STORE to show the subregions when I hit a button.
I tried creating a dynamic action for on click of the add button but get the following error:
The selected button uses a 'Button Template' that does not contain the #BUTTON_ID# substitution string
I went to the templates and found:
Substitution Strings
Substitution strings are used within sub templates to reference component values. This report details substitution string usage for this template.
Substitution String
Referenced
From
Description
#LINK#
Yes
Template
To be used in an "href" attribute
#JAVASCRIPT#
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#LABEL#
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Template
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#BUTTON_ATTRIBUTES#
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Button Attributes
#BUTTON_ID#
No
Generated button ID will be either the button's Static ID if defined, or if not will be an internally generated ID in the format 'B' || [Internal Button ID]
I then tried creating a page process, pl/sql, :P400_DISPLAY :='STORE'; when the appropriate button is pressed. The button action is submit page. However, it does not change the P400_DISPLAY value and the subregions stay hidden.
Suggestions please on how to fix the template or change the P400_DISPLAY value?The root issue is that, although you change the value of your page item, it isn't visible to other areas of the page until it is in the session. So, any other action based on the value of your page item; the visibility of a control, a report based on the item's value, etc. will all be unaffected by changing the value of the page item until it has been changed in the session. Even after this the items are stored in the session, you must thereafter do something to cause the value to be reevaluated. To see the effect of this, observe that your page loads and evaluates the value of your page item, it sees that is "MAIN" and hides the regions. However, it doesn't reevaluate them after this.
So; your choices to get this value set in the session are to either Submit the page, or use JavaScript to set the value in the session. If you use the latter of these, you'll have to do some further work to cause the visibility tests to be re-run, So, let's stick with with the submit method.
What you've done above sounds correct for this but, there are a lot of decisions you could have made that might have caused things not to happen in the correct sequence.
Firstly, let's confirm that what I describe above is your problem. From the development environment, load the page, click the button to change the value and submit. Now, click the link labelled Session. Is it still set to MAIN? If so; this is your issue.
Let's start with the your After Header computation. Did you set it to *only* run if the current value of your page item is NULL??? If not, that's your problem.
Load Page -> Item set to 'Main' by Computation -> Click Button -> Item set to STORE -> Submit -> Load Page -> Item set to 'Main' by Computation
See the problem?
Assuming this isn't the issue, you created a Branch to the same page, right? What is your process point for the Branch? Is it *After* Validation, Computation etc? Because if not, you aren't changing the value before the submit happens.
I bet it is the first issue but, take a look at these.
Cheers,
-Joe -
PLSQL processing of a dynamic sql report
Hi there,
I have a problem processing a dynamic sql report, specifically in referencing the PL/SQL column headings I have.
Basically I have a report that generates one row for each project a person belongs to, and then using htmldb_item.text creates one field for each day of the week (sysdate - sysdate+6) so that people can enter their hours worked. The idea is they then press a submit button and the hours are entered into a project table something like (date_worked, project_id, hours_worked), one row for each entry.
So I have:
for i in 1..HTMLDB_APPLICATION.G_F01.count
loop
... err... here I want to insert into the table the values(column_header, project_id, HTMLDB_APPLICATION.G_F01(i)).. but I don't know how to access that column_header value.
Is this possible and if so, how?
Many thanks,
Tosh.that gives me the values of the text fields, but what
I'd like to insert is the value of the column
header... so for example:Yes, I understood what you meant. I did have a differect project_id for each INSERT in my SQL above. I guess that should have been day_id
Since you are generating the tabular form SQL manually, you know which htmldb_item.text index corresponds to which column (which represents day_id in your case). So, use this to write 6 INSERT statements, one for each day. day_id would be a number going from 0 thru 6 where 0 represents Sunday and 6 represents Saturday.
Bottom line: This is like generating/updating a calendar, your column headings are always fixed (Sun thru Saturday), just the date they represent would change. -
We are running an oracle sql procedure that uses a LOT of dynamic sql. We are using a 3rd party package (SQR) as a sort of shell to run the sql procedure. The 3rd party package passes to us an oracle error. This error says, in effect, that there are no inactive database cursors available and that the sql program is too large to process. We conclude from this that we must increase one or more of the cursor parameters in init.ora (v$parameters). Is this the correct assumption? If not, does anyone know what we can do? We'd prefer not to break up the sql procedure into smaller pieces.
increase the parameter for open cursors.
check, wether all cursors in your programs are closed in time, or if you are using ref cursors from front-ends (e.g. Java JDBC) that this front-ends close these ref cursors , too.
If you want to decrease the size of procedures get rid of comments, superfluos spaces, tabs, etc.
keep a commented version outside vor documentation purposes.
Hope thsi helps -
Strange behavior when searching a phrase using reg exp and dynamic sql
Hi,
I have a strange issue while using dynamic sql for an apex page. I have a requirement to search a string in the database column which is entered by user on a page item. The search process should search the whole phrase only.
I have a query generated dynamically in the back end and use it in a cursor in the stored procedure
SELECT t.group_cn , t.group_desc, t.group_type, t.partner_organization_id, t.partner_organization
FROM vr_idm_group t WHERE regexp_like(t.group_desc,'(^|\W)HR Selection & Assignment(\W|$)', 'i')The pl sql code with the dynamic sql statements are below.
IF p_search_process NOT in ('PARTNER') THEN
OPEN v_cursor FOR v_sql;
ELSE
OPEN v_cursor FOR v_sql USING p_search_id;
END IF;
LOOP
FETCH v_cursor INTo v_obj.group_cn, v_obj.group_desc, v_obj.group_type, v_obj.partner_organization_id,
v_obj.partner_organization, v_obj.match_count;
EXIT WHEN v_cursor%NOTFOUND ;
v_search_array.extend;
v_search_array(v_search_array.last) := v_obj;
dbms_output.put_line(v_sql);
END LOOP;The search works fine if the search string does not contain any special character like &,- etc.
However, if the search string contains any special character, it does not return any thing. This strange issue happens only if I call the procedure from the apex page and the search string contains a special character. (please note that the procedure works fine even from apex if the string does not have a special character). When I debugged this, found that, the cursor does not fetch any rows (it is supposed to fetch two rows) for unknown reason. When I run the query separately, it returns the two rows (in which the column group_desc contains the search string "HR Selection & Assignment") as desired. Also, when I test the procedure in the back end (PLSQL developer), it works fine.
Any idea, what is causing this strange behaviour?
Advance thanks.
Regards,
Natarajani don't see anything about a dataProvider. you're assigning a source for a scrollpane. scrollpane's don't have a dataProvider property.
anyway, other than arrayRun always being false when that last if-statement executes, what's the problem? doesn't that movieclip display when that 2nd branch of the last if-statement executes (assuming instance is defined correctly etc)? -
ODBC, bulk inserts and dynamic SQL
I am writing an application running on Windows NT 4 and using the oracle ODBC driver (8.01.05.00, that inserts many rows at a time (10000+) into an oracle 8i database.
At present, I am using a stored procedure to insert each row into the database. The stored procedure uses dynamic SQL because I can only determine the table and field names at run time.
Due to the large number of records, it tends to take a while to perform all the inserts. I have tried a number of solutions such as using batches of SQL statements (e.g. "INSERT...;INSERT...;INSERT..."), but the oracle ODBC driver only seems act on the first statement in the batch.
I have also considered using the FOR ALL statement and SQL*Loader utility.
My problem with FOR ALL is that I'm not sure it works on dynamic SQL statements and even if it did, how do I pass an array of statements to the stored procedure.
I ruled out SQL* Loader because I could not find a way to invoke it it from an ODBC statement. Secondly, it requires the spawining of a new process.
What I am really after is something similar the the SQL Server (forgive me!) BULK INSERT statement where you can simply create an input file with all the records you want to insert, and pass it along in an ODBC statement such as "BULK INSERT <filename>".
Any ideas??
nullHi,
I faced this same situation years ago (Oracle 7.2!) and had the following alternatives.
1) Use a 3rd party tool such as Sagent or CA Info pump (very pricey $$$)
2) Use VisualC++ and OCI to hook into the array insert routines (there are examples of these in the Oracle Home).
3) Use SQL*Loader (the best performance, but no real control of what's happening).
I ended up using (2) and used the Rouge Wave dbtools.h++ library to speed up the development.
These days, I would also suggest you take a look at Perl on NT (www.activestate.com) and the DBlib modules at www.perl.org. I believe they will also do bulk loading.
Your problem is that your program is using Oracle ODBC, when you should be using Oracle OCI for best performance.
null -
I want to be able to use a fuction that will dynamically create a SQL statement and then open a cursor based on that SQL statement and return a ref to that cursor. To achieve that, I am trying to build the sql statement in a varchar2 variable and using that variable to open the ref cursor as in,
open l_stmt for refcurType;
where refcurType is a strong ref cursor. I am unable to do so because I get an error indication that I can not use strong ref cursor type. But, if I can not use a strong ref cursor, I will not be able to use it to build the report based on the ref cursor because Reports 9i requires strong ref cursors to be used. Does that mean I can not use dynamic sql with Reports 9i ref cursors? Else, how I can do that? Any documentation available?Philipp,
Thank you for your reply. My requirement is that, sometimes I need to construct a whole query based on some input, and sometimes not. But the output record set would be same and the layout would be more or less same. I thought ref cursor would be ideal. Ofcourse, I could do this without dynamic SQL by writing the SQL multiple times if needed. But, I think dynamic SQL is a proper candidate for this case. Your suggestion to use lexical variable is indeed a good alternative. In effect, if needed, I could generate an entire SQL statement and place in some place holder (like &stmt) and use it as a static SQL query in my data model. In that case, why would one ever need ref cursor in reports? Is one more efficient over the other? My guess is, in the lexical variable case, part of the processing (like parsing) is done on the app server while in a function based ref cursor, the entire process takes place in the DB server and there is probably a better chance for re-use(?)
Thanks,
Murali. -
I am writing an application running on Windows NT 4 and using the oracle ODBC driver (8.01.05.00, that inserts many rows at a time (10000+) into an oracle 8i database.
At present, I am using a stored procedure to insert each row into the database. The stored procedure uses dynamic SQL because I can only determine the table and field names at run time.
Due to the large number of records, it tends to take a while to perform all the inserts. I have tried a number of solutions such as using batches of SQL statements (e.g. "INSERT...;INSERT...;INSERT..."), but the oracle ODBC driver only seems act on the first statement in the batch.
I have also considered using the FOR ALL statement and SQL*Loader utility.
My problem with FOR ALL is that I'm not sure it works on dynamic SQL statements and even if it did, how do I pass an array of statements to the stored procedure.
I ruled out SQL* Loader because I could not find a way to invoke it it from an ODBC statement. Secondly, it requires the spawining of a new process.
What I am really after is something similar the the SQL Server (forgive me!) BULK INSERT statement where you can simply create an input file with all the records you want to insert, and pass it along in an ODBC statement such as "BULK INSERT <filename>".
Any ideas??
nullHi,
I faced this same situation years ago (Oracle 7.2!) and had the following alternatives.
1) Use a 3rd party tool such as Sagent or CA Info pump (very pricey $$$)
2) Use VisualC++ and OCI to hook into the array insert routines (there are examples of these in the Oracle Home).
3) Use SQL*Loader (the best performance, but no real control of what's happening).
I ended up using (2) and used the Rouge Wave dbtools.h++ library to speed up the development.
These days, I would also suggest you take a look at Perl on NT (www.activestate.com) and the DBlib modules at www.perl.org. I believe they will also do bulk loading.
Your problem is that your program is using Oracle ODBC, when you should be using Oracle OCI for best performance.
null -
How to create a function with dynamic sql or any better way to achieve this?
Hello,
I have created below SQL query which works fine however when scalar function created ,it
throws an error "Only functions and extended stored procedures can be executed from within a
function.". In below code First cursor reads all client database names and second cursor
reads client locations.
DECLARE @clientLocation nvarchar(100),@locationClientPath nvarchar(Max);
DECLARE @ItemID int;
SET @locationClientPath = char(0);
SET @ItemID = 67480;
--building dynamic sql to replace database name at runtime
DECLARE @strSQL nvarchar(Max);
DECLARE @DatabaseName nvarchar(100);
DECLARE @localClientPath nvarchar(MAX) ;
Declare databaselist_cursor Cursor for select [DBName] from [DataBase].[dbo].
[tblOrganization]
OPEN databaselist_cursor
FETCH NEXT FROM databaselist_cursor INTO @DatabaseName
WHILE @@FETCH_STATUS = 0
BEGIN
PRINT 'Processing DATABASE: ' + @DatabaseName;
SET @strSQL = 'DECLARE organizationlist_cursor CURSOR
FOR SELECT '+ @DatabaseName +'.[dbo].[usGetLocationPathByRID]
([LocationRID])
FROM '+ @DatabaseName +'.[dbo].[tblItemLocationDetailOrg] where
ItemId = '+ cast(@ItemID as nvarchar(20)) ;
EXEC sp_executesql @strSQL;
-- Open the cursor
OPEN organizationlist_cursor
SET @localClientPath = '';
-- go through each Location path and return the
FETCH NEXT FROM organizationlist_cursor into @clientLocation
WHILE @@FETCH_STATUS = 0
BEGIN
SELECT @localClientPath = @clientLocation;
SELECT @locationClientPath =
@locationClientPath + @clientLocation + ','
FETCH NEXT FROM organizationlist_cursor INTO
@clientLocation
END
PRINT 'current databse client location'+ @localClientPath;
-- Close the Cursor
CLOSE organizationlist_cursor;
DEALLOCATE organizationlist_cursor;
FETCH NEXT FROM databaselist_cursor INTO @DatabaseName
END
CLOSE databaselist_cursor;
DEALLOCATE databaselist_cursor;
-- Trim the last comma from the string
SELECT @locationClientPath = SUBSTRING(@locationClientPath,1,LEN(@locationClientPath)- 1);
PRINT @locationClientPath;
I would like to create above query in function so that return value would be used in
another query select statement and I am using SQL 2005.
I would like to know if there is a way to make this work as a function or any better way
to achieve this?
Thanks,This very simple: We cannot use dynamic SQL from used-defined functions written in T-SQL. This is because you are not permitted do anything in a UDF that could change the database state (as the UDF may be invoked as part of a query). Since you can
do anything from dynamic SQL, including updates, it is obvious why dynamic SQL is not permitted as per the microsoft..
In SQL 2005 and later, we could implement your function as a CLR function. Recall that all data access from the CLR is dynamic SQL. (here you are safe-guarded, so that if you perform an update operation from your function, you will get caught.) A word of warning
though: data access from scalar UDFs can often give performance problems and its not recommended too..
Raju Rasagounder Sr MSSQL DBA
Hi Raju,
Can you help me writing CLR for my above function? I am newbie to SQL CLR programming.
Thanks in advance!
Satya
-
Calling JS function in pl/sql process
Hello!
I have a js function defined in 'HTML Header' :
<script language="JavaScript" type="text/javascript">
function disp_alert()
alert("Data is invalid! Correct the data and click CONFIRM again.")
</script>
I also have a pl/sql process on this page. I want to call disp_alert function in a following way:
if ... then call function
else dbms_output.put_line('...');
end if;
How can I call this js function in 'if'??
TomThere ARE ways to accomplish something like this, but they're much more complex.
You must create a JavaScript that uses APEX's built in AJAX components; a form button will call the JavaScript, which will in turn call a PL/SQL procedure saved as an "On Demance Shared Application Process." This procedure can run any checks you like against the DB, and return data to the Javascript to display in an alert.
You can see an example of this in use at an APEX page I created: http://htmldb.oracle.com/pls/otn/f?p=19864:5
This isn't the same thing, but is accomplishing what it does through an APEX form, a javascript call on the text field to a PL/SQL Process that returns rows from the database dynamically...thus allowing the client side JavaScript to call server side PL/SQL. -
Build dynamic SQL query in Database Adapter.
Hi All,
I have a requirement to build dynamic sql query at Database Adapter.
My BPEL process is getting search spec as input from siebel. I need to process this searchspec in BPEL and need to build the SQL query dynamically at Database Adapter to fetch the records from DB.
it goes like this....
1. Sieble Search Spec: city1 OR city2 OR city3 OR city4 .....
I need to build query as
select * from S_ADDR_PER where city like 'city1' OR city like 'city2' OR city like 'city3' OR city like 'city4' ......
2. Siebel Search spec: city1 AND country1 AND state1....
I need to build query as
Select * from S_ADDR_PER where city like 'city1' AND country like 'country1' AND state like 'state1' ....
3. Siebel Search spec: state
I need to build query as
select * from S_ADDR_PER where state like '%state%';
Is it feasible in Database Adapter? if its Yes.
Any guidelines to achieve this?
Thank you
ChandraHi All,
I have a requirement to build dynamic sql query at Database Adapter.
My BPEL process is getting search spec as input from siebel. I need to process this searchspec in BPEL and need to build the SQL query dynamically at Database Adapter to fetch the records from DB.
it goes like this....
1. Sieble Search Spec: city1 OR city2 OR city3 OR city4 .....
I need to build query as
select * from S_ADDR_PER where city like 'city1' OR city like 'city2' OR city like 'city3' OR city like 'city4' ......
2. Siebel Search spec: city1 AND country1 AND state1....
I need to build query as
Select * from S_ADDR_PER where city like 'city1' AND country like 'country1' AND state like 'state1' ....
3. Siebel Search spec: state
I need to build query as
select * from S_ADDR_PER where state like '%state%';
Is it feasible in Database Adapter? if its Yes.
Any guidelines to achieve this?
Thank you
Chandra -
Getting error while using DYNAMIC SQL
Hi Team,
I am Oracle DBA. I have limited knowledge on PL/SQL. I used below PL/SQL code to drop 50 partitons from one of the table.
I used Dynamic SQL EXECUTE IMMEDIATE to drop partions. But error occured. If I commented EXECUTE IMMEDIATE, procedure executed successfully.
Please suggest me, where i did the mistake. Also please suggest for better code than my code. please find below code and error details.
SQL> ed
Wrote file afiedt.buf
1 DECLARE
2 CURSOR DROP_PARTITON IS select partition_name from user_tab_subpartitions where PARTITION_NAME<='ABCD_2011_04';
3 BEGIN
4 for curr IN DROP_PARTITON LOOP
5 DBMS_output.put_line(curr.partition_name);
6 execute immediate(Alter table Table_Name drop partition curr.partition_name);
7 end loop;
8* END;
SQL> /
execute immediate(Alter table BILLCHRG drop partition curr.partition_name);
ERROR at line 6:
ORA-06550: line 6, column 19:
PLS-00103: Encountered the symbol "ALTER" when expecting one of the following:
( - + case mod new not null others <an identifier>
<a double-quoted delimited-identifier> <a bind variable> avg
count current exists max min prior sql stddev sum variance
execute forall merge time timestamp interval date
<a string literal with character set specification>
<a number> <a single-quoted SQL string> pipe
<an alternatively-quoted string literal with character set specification>
<an alternative
SQL> ed
Wrote file afiedt.buf
1 DECLARE
2 CURSOR DROP_PARTITON IS select partition_name from user_tab_subpartitions where PARTITION_NAME<='ABCD_2011_04';
3 BEGIN
4 for curr IN DROP_PARTITON LOOP
5 DBMS_output.put_line(curr.partition_name);
6 --execute immediate(Alter table TABLE_NAME drop partition curr.partition_name);
7 end loop;
8* END;
SQL> /
ABCD_2009_06
ABCD_2009_06
ABCD_2009_06
BILLCHRG_2011_04
PL/SQL procedure successfully completed.PL/SQL code runs on the server, inside an Oracle process - thus PL/SQL code cannot dynamically write and display messages to the client. That server process is not connected to any keyboard, mouse or display.
DBMS_OUTPUT can be used. This is a PL/SQL buffer area in that server process that code can write lines of text too. When the server process informs the client that it has completed, the client can now request the contents of the DBMS_OUTPUT buffer and the client can display it on the client device.
This is what set serveroutput on in SQL*Plus does - tell the sqlplus client to request the DBMS_OUTPUT buffer after each Oracle server call made and to display the contents locally.
So to display the SQL command can be done using DBMS_OUTPUT. E.g.
declare
dropPart varchar2(32767);
begin
for c in (select...) loop
dropPart := 'alter table my_tab drop partition '||c.partition_name';
--// write the SQL command to DBMS_OUTPUT
DBMS_OUTPUT.put_line( dropPart );
--// execute the SQL using a begin..end block in order to catch error
begin
execute immediate dropPart;
DBMS_OUTPUT.put_line( 'command completed successfully' );
exception when OTHERS then
DBMS_OUTPUT.put_line( 'command failed with: '||SQLERRM(SQLCODE) );
end;
end loop;
end;So after this code block has been executed and partitions dropped, sqlplus will display the DBMS_OUTPUT generated by this code block. -
How to control the maximum time that a dynamic sql can execute
Hi,
I want to restrict the maximum time that a dynamic sql can execute in a plsql block.
If the execution is not completed, the execution should be terminated and a exception should be raised.
Please let me know, if there is any provision for the same in Oracle 10g.
I was reading about Oracle Resource Database Resource Manager, which talks about restricting the maximum time of execution for Oracle session for a user.
However I am not sure, if this can be used to control the execution of dynamic sql in a plsql block.
Please provide some pointers.
Thank you,
Warm Regards,
Navin Srivastavanavsriva wrote:
We are building a messaging framework, which is used to send time sensitive messages to boundary system.I assume this means across application/database/server boundaries? Or is the message processing fully localised in the Oracle database instance?
Every message has a time to live. if the processing of message does not occurs within the specified time, we have to rollback this processing and mark the message in error state.This is a problematic requirement.. Time is not consistent ito data processing on any platform (except real-time ones). For example, messageFoo1 has a TTL (time to live) of 1 sec. It needs to read a number of rows from a table. The mere factor of whether those rows are cached in the database buffer cache, or still residing on disk, will play a major role in execution time. Physical I/O is significantly slower that logical I/O.
As a result, with the rows on disk, messageFoo1 exceeds the 1s TTL and fails. messageFoo2 is an identical message. It now finds most of the rows that were read by messageFoo1 in the buffer cache, enabling it to complete its processing under 1s.
What is the business logic behind the fact that given this approach, messageFoo1 failed, and the identical messageFoo2 succeeded? The only difference was physical versus logical I/O. How can that influence the business validation/requirement model?
If it does, then you need to look instead at a real-time operating system and server platform. Not Windows/Linux/Unix/etc. Not Oracle/SQL-Server/DB2/etc.
TTL is also not time based in other s/w layers and processing. Take for example the traceroute and ping commands for the Internet Protocol (IP) stack. These commands send an ICMP (Internet Control Message Protocol) packet.
This packet is constructed with a TTL value too. When TTL is exceeded, the packet expires and the sender receives a notification packet to that regard.
However, this TTL is not time based, but "+hop+" based. Each server's IP stack that receives an ICMP packet as it is routed through the network, subtracts 1 from the TTL and the forwards the packet (with the new TTL value). When a server's IP stack sees that TTL is zero, it does not forward the packet (with a -1 TTL), but instead responds back to the sender with an ICMP packet informing the sender that the packet's TTL has expired.
As you can see, this is a very sensible and practical implementation of TTL. Imagine now that this is time based.. and the complexities that will be involved for the IP stack s/w to deal with it in that format.
Making exact response/execution times part of the actual functional business requirements need to be carefully considered.. as this is very unusual and typically only found in solutions implemented in real-time systems. -
Dynamic SQL within a SQL Query ?
is there any possibility to do like this ?
SELECT table_name, XXXXXXXX('SELECT Count(*) FROM '||table_name) tot_rows
FROM dba_tables
WHERE owner = 'SCOTT';or any other trick to run dynamic SQL within the SQL Query?
Hoping....that it should be.
Regards,
OrapdevOne small disadvantage: it is executing 202 SQL statements: 3 "user SQL statements" (the one above and the 2 "select count(*)..."), and 199 internal ones ...How did you get to those numbers?
I just traced this statement and found completely different results:
TKPROF: Release 10.2.0.3.0 - Production on Tue Jul 10 12:12:10 2007
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Trace file: diesl10r2_ora_5440.trc
Sort options: default
count = number of times OCI procedure was executed
cpu = cpu time in seconds executing
elapsed = elapsed time in seconds executing
disk = number of physical reads of buffers from disk
query = number of buffers gotten for consistent read
current = number of buffers gotten in current mode (usually for update)
rows = number of rows processed by the fetch or execute call
declare cursor NlsParamsCursor is SELECT * FROM
nls_session_parameters;begin SELECT Nvl(Lengthb(Chr(65536)),
Nvl(Lengthb(Chr(256)), 1)) INTO :CharLength FROM dual; for NlsRecord in
NlsParamsCursor loop if NlsRecord.parameter = 'NLS_DATE_LANGUAGE' then
:NlsDateLanguage := NlsRecord.value; elsif NlsRecord.parameter =
'NLS_DATE_FORMAT' then :NlsDateFormat := NlsRecord.value; elsif
NlsRecord.parameter = 'NLS_NUMERIC_CHARACTERS' then
:NlsNumericCharacters := NlsRecord.value; elsif NlsRecord.parameter =
'NLS_TIMESTAMP_FORMAT' then :NlsTimeStampFormat := NlsRecord.value;
elsif NlsRecord.parameter = 'NLS_TIMESTAMP_TZ_FORMAT' then
:NlsTimeStampTZFormat := NlsRecord.value; end if; end loop;end;
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 1
Fetch 0 0.00 0.00 0 0 0 0
total 2 0.00 0.00 0 0 0 1
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 50
SELECT NVL(LENGTHB(CHR(65536)), NVL(LENGTHB(CHR(256)), 1))
FROM
DUAL
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.01 0.00 0 0 0 0
Fetch 1 0.00 0.00 0 0 0 1
total 3 0.01 0.00 0 0 0 1
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 50 (recursive depth: 1)
Rows Row Source Operation
1 FAST DUAL (cr=0 pr=0 pw=0 time=7 us)
SELECT *
FROM
NLS_SESSION_PARAMETERS
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 1 0.00 0.00 0 0 0 17
total 3 0.00 0.00 0 0 0 17
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 50 (recursive depth: 1)
Rows Row Source Operation
17 FIXED TABLE FULL X$NLS_PARAMETERS (cr=0 pr=0 pw=0 time=124 us)
select PARAMETER,VALUE
from
nls_session_parameters where PARAMETER in('NLS_NUMERIC_CHARACTERS',
'NLS_DATE_FORMAT','NLS_CURRENCY')
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 1 0.00 0.00 0 0 0 3
total 3 0.00 0.00 0 0 0 3
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 50
Rows Row Source Operation
3 FIXED TABLE FULL X$NLS_PARAMETERS (cr=0 pr=0 pw=0 time=57 us)
select to_char(9,'9C')
from
dual
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 1 0.00 0.00 0 0 0 1
total 3 0.00 0.00 0 0 0 1
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 50
Rows Row Source Operation
1 FAST DUAL (cr=0 pr=0 pw=0 time=2 us)
SELECT table_name,
DBMS_XMLGEN.getxmltype ('select count(*) c from ' || table_name).EXTRACT
('//text').getstringval
() tot
FROM dba_tables
WHERE table_name IN ('EMP', 'DEPT') AND owner = 'SCOTT'
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 1 0.01 0.02 0 48 0 2
total 3 0.01 0.02 0 48 0 2
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 50
Rows Row Source Operation
2 HASH JOIN (cr=42 pr=0 pw=0 time=2952 us)
2 MERGE JOIN CARTESIAN (cr=42 pr=0 pw=0 time=1206 us)
2 NESTED LOOPS OUTER (cr=42 pr=0 pw=0 time=478 us)
2 NESTED LOOPS OUTER (cr=36 pr=0 pw=0 time=421 us)
2 NESTED LOOPS OUTER (cr=30 pr=0 pw=0 time=379 us)
2 NESTED LOOPS OUTER (cr=30 pr=0 pw=0 time=365 us)
2 NESTED LOOPS (cr=22 pr=0 pw=0 time=312 us)
2 NESTED LOOPS (cr=16 pr=0 pw=0 time=272 us)
2 NESTED LOOPS (cr=8 pr=0 pw=0 time=172 us)
1 TABLE ACCESS BY INDEX ROWID USER$ (cr=2 pr=0 pw=0 time=56 us)
1 INDEX UNIQUE SCAN I_USER1 (cr=1 pr=0 pw=0 time=30 us)(object id 44)
2 INLIST ITERATOR (cr=6 pr=0 pw=0 time=111 us)
2 TABLE ACCESS BY INDEX ROWID OBJ$ (cr=6 pr=0 pw=0 time=87 us)
2 INDEX RANGE SCAN I_OBJ2 (cr=4 pr=0 pw=0 time=54 us)(object id 37)
2 TABLE ACCESS CLUSTER TAB$ (cr=8 pr=0 pw=0 time=98 us)
2 INDEX UNIQUE SCAN I_OBJ# (cr=4 pr=0 pw=0 time=26 us)(object id 3)
2 TABLE ACCESS CLUSTER TS$ (cr=6 pr=0 pw=0 time=39 us)
2 INDEX UNIQUE SCAN I_TS# (cr=2 pr=0 pw=0 time=13 us)(object id 7)
2 TABLE ACCESS CLUSTER SEG$ (cr=8 pr=0 pw=0 time=37 us)
2 INDEX UNIQUE SCAN I_FILE#_BLOCK# (cr=4 pr=0 pw=0 time=21 us)(object id 9)
0 INDEX UNIQUE SCAN I_OBJ1 (cr=0 pr=0 pw=0 time=4 us)(object id 36)
2 TABLE ACCESS BY INDEX ROWID OBJ$ (cr=6 pr=0 pw=0 time=33 us)
2 INDEX UNIQUE SCAN I_OBJ1 (cr=4 pr=0 pw=0 time=23 us)(object id 36)
2 TABLE ACCESS CLUSTER USER$ (cr=6 pr=0 pw=0 time=28 us)
2 INDEX UNIQUE SCAN I_USER# (cr=2 pr=0 pw=0 time=12 us)(object id 11)
2 BUFFER SORT (cr=0 pr=0 pw=0 time=716 us)
1 FIXED TABLE FULL X$KSPPI (cr=0 pr=0 pw=0 time=661 us)
1436 FIXED TABLE FULL X$KSPPCV (cr=0 pr=0 pw=0 time=1449 us)
select count(*) c
from
EMP
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 2 0.00 0.00 0 1 0 1
total 4 0.00 0.00 0 1 0 1
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 50 (recursive depth: 1)
Rows Row Source Operation
1 SORT AGGREGATE (cr=1 pr=0 pw=0 time=96 us)
14 INDEX FULL SCAN EMP_IDX (cr=1 pr=0 pw=0 time=46 us)(object id 61191)
select metadata
from
kopm$ where name='DB_FDO'
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 1 0.00 0.00 0 2 0 1
total 3 0.00 0.00 0 2 0 1
Misses in library cache during parse: 0
Optimizer mode: CHOOSE
Parsing user id: SYS (recursive depth: 1)
Rows Row Source Operation
1 TABLE ACCESS BY INDEX ROWID KOPM$ (cr=2 pr=0 pw=0 time=42 us)
1 INDEX UNIQUE SCAN I_KOPM1 (cr=1 pr=0 pw=0 time=22 us)(object id 365)
select count(*) c
from
DEPT
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 2 0.00 0.00 0 1 0 1
total 4 0.00 0.00 0 1 0 1
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 50 (recursive depth: 1)
ALTER SESSION SET sql_trace=FALSE
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 0 0.00 0.00 0 0 0 0
total 2 0.00 0.00 0 0 0 0
Misses in library cache during parse: 0
Parsing user id: 50
OVERALL TOTALS FOR ALL NON-RECURSIVE STATEMENTS
call count cpu elapsed disk query current rows
Parse 5 0.00 0.00 0 0 0 0
Execute 5 0.00 0.00 0 0 0 1
Fetch 3 0.01 0.02 0 48 0 6
total 13 0.01 0.03 0 48 0 7
Misses in library cache during parse: 0
OVERALL TOTALS FOR ALL RECURSIVE STATEMENTS
call count cpu elapsed disk query current rows
Parse 5 0.00 0.00 0 0 0 0
Execute 5 0.01 0.00 0 0 0 0
Fetch 7 0.00 0.00 0 4 0 21
total 17 0.01 0.00 0 4 0 21
Misses in library cache during parse: 0
9 user SQL statements in session.
1 internal SQL statements in session.
10 SQL statements in session.
Trace file: diesl10r2_ora_5440.trc
Trace file compatibility: 10.01.00
Sort options: default
1 session in tracefile.
9 user SQL statements in trace file.
1 internal SQL statements in trace file.
10 SQL statements in trace file.
10 unique SQL statements in trace file.
132 lines in trace file.
0 elapsed seconds in trace file.I only see a ratio of 1:9 for user- to internal SQL statements?
michaels> select * from v$version
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Prod
PL/SQL Release 10.2.0.3.0 - Production
CORE 10.2.0.3.0 Production
TNS for 32-bit Windows: Version 10.2.0.3.0 - Production
NLSRTL Version 10.2.0.3.0 - Production
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