PL/SQL :: Bind Variables And Expression Evaluation
Aug 29, 2013
i have been looking at a query that uses a wrong plan. db=11.2.0.3 with user bind peeking enabled. this is a simplified version demonstrating the problem:
select egp.bsn,egp.klantnummer as "Persoonsnummer", egp.samengesteldenaam as "Samengesteldenaam", egp.geboortedatum as "Geboortedatum"from pr_eigenschappen2 egpwhere(egp.bsn = :b1 or :b2 is null)and rownum < 51 egp.bsn is varchar2(10) and has high selectivity (almost unique), and is btree-indexed. table and index have adequate statistics. when run with b1:=928818 and b2:=928818 (both bound as varchar2(10)) a full table scan+filter is used on pr_eigenschappen2. if the query is changed to select egp.bsn,egp.klantnummer as "Persoons nummer", egp.samengesteldenaam as "Samengesteldenaam", egp.geboortedatum as "Geboortedatum"from pr_eigenschappen2 egpwhere(egp.bsn = :b1 or 928818 is null)
and rownum < 51the index on bsn is used, and the query is not taking 3.9 seconds but 1 millisecond.if i would have a choice, the query would be different. i don't want to talk about the raison d'etre of the query, i would like to know why the optimizer is not using the index in the first case.
Which of the below is considered a bind variable. In example one proc. Test the parameter p1 is directly used in the query, so this can be considered as a bind variable.
Is that true about the second proc. where p1 is assigned to a local variable v1 , or this needs hard parsing because v1 is not a bind variable ?
Create or replace procedure test(p1 IN VARCHAR2,p_refcursor OUT SYS_REFCURSOR) IS BEGIN OPEN p_refcursor FOR select * from Test_tab WHERE item=p1; END; ------------ Create or replace procedure test1(p1 IN VARCHAR2,p_refcursor OUT SYS_REFCURSOR) IS v1 varchar2(100):=p1; BEGIN OPEN p_refcursor FOR select * from Test_tab WHERE item=v1; END;
I have written a small code while going through the PL/SQL guide but I got a message for the BIND VARIABLE. I don't think I have used any bind variable in this code.
<<outer>> declare v_sal1 number(7,2) := 60000; v_comm number(7,2) : v_sal1 * 0.20; v_message varchar2(2000) := 'eligible for commission'; begin [code]........
Create and invoke the GET_JOB function to return a job title. a.Create and compile a function called GET_JOB to return a job title. b.Create a VARCHAR2 host variable called b_title, allowing a length of 35 characters. Invoke the function with job ID SA_REP to return the value in the host variable, and then print the host variable to view the result.
This is my FUNCTION: CREATE OR REPLACE FUNCTION GET_JOB( p_jobid IN jobs.job_id%TYPE) RETURN VARCHAR2
[code]...
This is how I invoked the FUNCTION but WHILE DECLARING THE BIND VARIABLE IT IS GIVING ME AN ERROR!!!!!
VARIABLE b_title VARCHAR2(35) set serveroutput on DECLARE P_JOBID VARCHAR2(10); v_jobtitle VARCHAR2(200);
I have a requirement where I have to return data as per filter clauses provided on the front end, which may or may not be filled as per the users' choice.
To create a test case, I have created a query joining the emp and dept tables and I add the where clauses dynamically depending on whether the filter has been provided or not.
CREATE OR REPLACE TYPE emp_ot AS OBJECT ( empno NUMBER(4), ename VARCHAR2(10),
[Code]....
It works very well, the 'literals' are being converted into bind variables (due to CURSOR_SHARING being set to SIMILAR) and the optimizer is able to figure out the correct execution path every time, although it is true that potentially 5 versions of this query will be sitting in the shared pool, but the DBAs are happy to live with that.
Going forward in version 12, CURSOR_SHARING=SIMILAR will be deprecated and the DBAs are not happy for us to write this sort of code anymore.
Is there a suitable way to achieve what this piece of code does?
I have tried and tested this method: SELECT emp.empno, emp.ename, emp.job, dept.deptno, dept.dname FROM emp, dept WHERE emp.deptno = dept.deptno AND emp.empno = NVL(p_empno, emp.empno) AND emp.ename LIKE NVL(p_ename, emp.ename)||'%' ...
but the query takes far longer to execute in this manner (that is using my real tables).
CODE Select Nvl(Sum(DbAmt),0), Nvl(Sum(CrAmt),0) From FnTrantt A Where A.GrpCode=:1 And A.CmpCode=:2 And'; A.DiviCode=:3 And'; A.SubDiVCd=:4 And'; A.FinYear>=''0001'' And'; A.VchDate Between :5 And :6' And A.GlCode In :7; [code]....
In The Above mentioned Code, am using bind variables, In variable no. 7 in passing character string ('05124','05125')I am not able to fetch the value,
create or replace procedure my_proc(p_user in varchar2) is l_cursor sys_refcursor; l_query constant varchar2(1000) := 'select a' || 'from ' || p_user || '.user_table' || 'where param0 = :x' || 'and param1 = :x' || 'and param2 = :x'
[Code]...
Suppose I execute my_proc many times and for multiple values of p_user. For performance reasons, will l_query be stored in the cache as I am using bind variables or it will not since I have the concatenation with p_user value ?
I am trying to create table using bind variable in EXECUTE IMMEDIATE.. I want to know whether oracle allows to create table using bind variable in EXECUTE IMMEDIATE..
Following is the example :
Declare test_tab varchar2(10) := 'tab_test'; sql_stm varchar2(100); Begin sql_stm := 'create table ' || :a || ' (col1 NUMBER)'; dbms_output.put_line(sql_stm); EXECUTE IMMEDIATE sql_stm using test_tab; Exception WHEN OTHERS THEN dbms_output.put_line(sqlerrm || ' ' || sqlcode); End;
After running above block it is giving error : ORA-01008: not all variables bound.
We have recently upgraded application (from Oracle Applications 11.5.9 to 12.1.3) and database (from 9.2.0.5.0 to 11.2.0.3.0).Since we are confronting to performances issues, i try to analyse some queries which Explains plans seems strange (in my opinion).Studying one of them i discover the next case (which according to my logic, i can't explain): --
Just bind variable --select *from MTL_MATERIAL_TRANSACTIONS mmtwhere 1 = 1and mmt.INVENTORY_ITEM_ID = :p1and mmt.ORGANIZATION_ID = :p2and mmt.TRANSACTION_REFERENCE = :p3--and mmt.SUBINVENTORY_CODE = :p4 PlanSELECT STATEMENT ALL_ROWS Cost: 5 Bytes: 361 Cardinality: 1 2 TABLE ACCESS BY INDEX ROWID TABLE INV.MTL_MATERIAL_TRANSACTIONS Cost: 5 Bytes: 361 Cardinality: 1 1 INDEX RANGE SCAN INDEX XXSPE.XXSPE_MTL_MATERIAL_TRANSAC_N99 Cost: 3 Cardinality: 2-- Nvl on bind variable --select *from MTL_MATERIAL_TRANSACTIONS mmtwhere 1 = 1and mmt.INVENTORY_ITEM_ID = :p1and
I am trying to create a collection using bind variables in APEX 4.1. I have the following procedure but all I get is an error in the debug page DOH ORA-20104:
create_collection_from_query_b Error:ORA-01006: bind variable does not exist
Am using Oracle 9i and developing stored procedures in SQL Developer. Have a situation where one stored procedure A is calling another B. Stored proc B builds the SQL based on parameters passed in. For one of the parameters i would like to use a bind variable in the SQL that proc B builds. The bind var is passed back to proc A as a part of the SQL string. In proc A, i then try to bind that variable to a parameter(value), however, the bind does not seeem to work.
The SQL string contained in v_SQLStatement defined as VARCHAR(4000) that is passed back to proc A looks like:
SELECT em.event_title AS event_name, e.start_date AS start_date, e.end_date AS end_date FROM d_event_ml em inner join d_event e ON em.event_id = e.event_id WHERE em.language_id = 46 AND e.end_date >= SYSDATE AND e.stream_id IN ( :v_x1 ) AND e.event_id IN (SELECT event_id FROM d_events_seas [code]....
and o_EventList is defined as REF CURSOR. i'm experiencing is that :v_x1 stays as :v_x1 and does not change.This is my first attempt at using bind vars. URL....
I have an assignment to check the consistency of Oracle database for different conditions.I am having some 200+ columns i a table i need to populate data using prepare statement in .net and check the conditions how it works for each loop values.I am having loop values starting from 1,5,50,100.... 10000k i will increment the loop value as 1,5,50,100.... 10000k and need to get the start time and end time of each loop, i need to check the consistency of the database.
Value for the loop(1,5,50,100.... 10000k) will be from a xml file or text file For the 200+ Columns i am having 2PK's.
CONDIDTIONS
1)Whether i need to restart for every loop value say if i run loop value as 1 then i need to restart the system (not the services) and run for loop value 5 and restart and so on. 2)Whether i need to restart for every loop value say if i run loop value as 1 then i need to restart the services and run for loop value 5 and restart services and so on. 3)Whether i can continue my loop value starting from 1,5...10000k without restart or any other process continuously running starting from 1...10000k in single go
why i am asking this is whether Oracle will act as differently when i do the above process and will there be any performance improvement or performance variations from the above steps if i followed. Whether there be same value for all the three steps or will there be variation in from time and end time for each conditions.
I need to check for insertion time(time difference b/w from time and then loop condition and then end time) for each loop.
"representant" acct_id per group (about 300 rows total)acct_repres as( select distinct acct_id, origin_id, acct_parm_id from ( select a.* , source_id , dense_rank() over (partition by source_id origin_id order by acct_nbr nulls first, acct_id) as odr from account a join account_parm ap on (a.parm_id = ap.acct_parm_id) ) where odr = 1)select col1 , col2 , ( select accct_id from acct_repres ar where ar.acct_parm_id = t2.acct_parm_id) col3 , ( select count(1) from acct_repres) col4from some_table t1join other_table t2 on (....)
And here it comes.
The "acct_repres" subquery returns more than 300 rows when executed separately. But when used in CTE sometimes (depending on execution plan) it seems to have only one row - the value in the column col4 is "1",while value for col3 is NULL for most of the cases. It looks like the the dense_rank function and the condition "where odr =1" are evaluated at the very end.
When I use MATERIALIZE hint the result was the same. But when I put the result of account_repres into dedicated table and use that table instead of CTE the output is correct.
I'm using forms 9i. Let's say I have a Block in the form B1. It has two items I1 and I2. I have a table called T1 that has a column say C1. The data in the only record in T1 is 'NAME_IN(''B1.I1'') = 1 OR NAME_IN(''B1.I2'') = 2'..In forms I need to execute the following at POST-QUERY trigger of the block:-
DECLARE VAR1 VARCHAR2(1000); BEGIN SELECT C1 INTO VAR1 FROM T1; [code]....
As you could see that the IF statement is wrong. But I get the condition (for IF condition) as a string value from some database table.
I have one problem when i try to setup ODTwithODAC121010 for connect from Visual Studio 2012 express to Oracle database 10g R2.When i setup ODTwithODAC121010 on Windows 7, can connect from visual studio to oracle database, but when i setup on Windows server 2012 Standard Evaluation x64 can't connect to oracle database through Visual studio 2012 express.
I check in registry of windows server 2012 x64 can't show Oracle folder in registry.how to connect from Visual studio 2012 express on windows server 2012 Standard evaluation x64 to Oracle database 10g.
I have the below cursor 1 which is working already.For my requirement i want to use bind variable like second cursor.But its telling Bind Variable "p_col_list" is NOT DECLARED.
How to use bind variable Here.
Cursor1: DECLARE emp_cv sys_refcursor; iid NUMBER := 1; i_sql varchar2(100); p_col_list varchar2(2000) := 'aaa,bbb,ccc,ddd'; BEGIN i_sql := 'select '''||REPLACE(p_col_list, ',', ''',''')||''' from dual '||CHR(10) ; dbms_output.put_line(i_sql); OPEN emp_cv FOR i_sql ; END;
Cursor2: DECLARE emp_cv sys_refcursor; iid NUMBER := 1; i_sql varchar2(100); p_col_list varchar2(2000) := 'aaa,bbb,ccc,ddd'; BEGIN i_sql := 'select '''||REPLACE(:p_col_list, ',', ''',''')||''' from dual '||CHR(10) ; dbms_output.put_line(i_sql); OPEN emp_cv FOR i_sql using p_col_list; END;
Whenever I try to create this trigger, it asks for values for :OLD and :NEW for some reason, and then when I attempt to put those in, it just says
Unable to bind ":OLD" Unable to bind ":NEW"
CREATE OR REPLACE TRIGGER audit_grade_change BEFORE UPDATE OF final_letter_grade ON enrollments FOR EACH ROW BEGIN UPDATE grade_change_history SET old_final_grade=:old.final_letter_grade, new_final_grade=:new.final_letter_grade; end;
when i am running the below plsql block i am getting the error like not a group by expressiong.
DECLARE CURSOR Cur_st IS SELECT DISTINCT CAST (A.STO_NO AS VARCHAR2 (5 CHAR)) AS BU_CODE, CAST ('STO' AS VARCHAR2 (3 CHAR)) AS BU_TYPE, CAST (NULL AS VARCHAR2 (7 BYTE)) AS CUST_NO, CAST (A.CUR_CODE AS VARCHAR2 (3 BYTE)) AS CUR_CODE, TO_DATE (A.SALES_DATE, 'YYMMDD'), CAST (A.RECEIPT_NO AS VARCHAR2 (10 BYTE)), [code]....
I am facing the same problem: SP2-0552: Bind variable "OLD" not declared. When my script create_trigger.sql is executed,there is no error but when i execute it inside a pl/sql block it get above error...In the trigger we are using if conditions
if(:new.sumthing=1)and (:old.sumthing=0)the do this..
Identical statements from this link : Parsing in Oracle — DatabaseJournal.com d. The bind variable types of the new statement should be of same type as the identified matching statement. i am getting confuse here .. when parsing occurs some links saying about bind variable.but official document never said about bind variables.
PLS-00049 BAD BIND VAIRABLE 'OLD.REMARKS' When i create or replace the following trigger
CREATE OR REPLACE TRIGGER T_TASKHISTORY AFTER UPDATE ON S_TASK FOR EACH ROW DECLARE BEGIN INSERT INTO S_TASKHIS (HIS_DATE,SUBJECT,DESP, SCHEDULED_DATE, SCHE_TIME ,USER_MOB_NO
