Ask about bind variables and LOVs

Similar Questions

• Use of Bind Variable in LOV Jdev 11.1.2

  Hello:
  I have a lookup_codes table that has values for different columns used in multiple LOV. I created the object based on reading view single SQL statement for the table with a variable binding. Based on the column where I want to set the LOV, I would like to change the variable binding, so the LOV shows that codes of research for this particular column. Essentially, I want to change the binding variable during execution. How can I accomplish this?
  
  Thanks for the help.
  
  Published by: 862658 on July 28, 2011 10:51

  Hello

  You can use the VO API and call vo.setWhereClauseParams ();
  http://download.Oracle.com/docs/CD/E12839_01/apirefs.1111/e10653/Oracle/JBO/Server/ViewObjectImpl.html

  Kind regards
  Brano

• EO base extension VO with bind variables and display - How To link

  Hello

  I extended an APInvDistAllVO view object by adding two fields which are functions. Basically, in the invoice approval screen, I want to add two fields where the distribution of the invoice is shown.

  The SQL contained in jdeveloper when you extend the VO object is different from the query, what I see in the invoice approval page by clicking on the APInvDistAllVO link. There are two bind variable: 1 = invoice_id and: 2 = line_number being added dynamically. After the extension of the view object, the invoice distribution line is displayed as no record found.

  In my opinion, it is due to not having bind variables does not correct parameters being passed, and under this point of view object is an object depending on the invoice header record. There is a link to the original View object as well. Will be very grateful if someone can provide the way forward in dealing with this situation.

  Rgds Fahad

  Hi AJ

  He worked after changing the style of bind.

  Thank you very much.

  Rgds

  Fahad

• Bind variables and dates

  I am writing a process to delete records based on dates.

  Here is the chart:

  Column name	Data type	Nullable	Default	Primary key
  ID	NUMBER	NO.	-	1
  CT_NAME	VARCHAR2 (100)	Yes	-	-
  CT_CATEGORY	VARCHAR2 (100)	Yes	-	-
  BASE_PTS	NUMBER	Yes	-	-
  PROD_PTS	NUMBER	Yes	-	-
  REF_PTS	NUMBER	Yes	-	-
  START_DATE	DATE	Yes	-	-
  END_DATE	DATE	Yes	-	-
  CREATED_ON	DATE	Yes	-	-
  CREATED_BY	VARCHAR2 (50)	Yes	-	-
  UPDATED_ON	DATE	Yes	-	-
  UPDATED_BY	VARCHAR2 (50)	Yes	-	-

  start_date and end_date are the fields of date key.

  The query will remove the dates with specific start and end dates.  The question I have, is that I get a ORA-01858: a non-digit character was found here where was waiting for a digital error while the query is running.

  remove from ct_point_values

  where start_date =: P4_START_DATE_V

  and end_date =: P4_END_DATE_V

  If I run the query in the sql window, no problem:

  remove from ct_point_values

  where start_date =' 01 / 01/2014 '

  and end_date = 31 December 2014"

  Find the query with the works of values hard-coded.  Links to fail.  I tried casting and to_char to_date variations with no luck.

  One thing that I notice, is that when I go to enter my bind variables in the sql workshop, the fields are pre-populated with this:

  1 & amp; #x2F 1 & amp; #x2F; 2014

  12 & amp; #x2F 31 & amp; #x2F; 2014

  01/01/2014 and 31/12/2014.  I found that the only element relates to this suggests that this is a possible bug:

  SQL Bind Variables workshop - Date issues

  Any thoughts on how to address this issue, or is it really a bug?

  I run on Apex 4.2, 11g.

  Thank you!

  Hello

  I guess that these dates come from elements on the page to which the user can select a range of dates.

  These fields have a custom format mask?

  What seems to be the case for me, is that these fields have an explicit format mask (for example: DD/MM/YYYY) but the default database/session format mask is something different (e.g. DD-MON-YYYY).

  I suppose also that the issue in the SQL workshop isn't something related.

• Bind Variables and using the keyword

  In my dynamic SQL, I use the same variable in several places in my query. Is there a way to avoid rewriting the same value multiple times in the list of arguments to bind? It is something like that - only pseudo code.
  

  DECLARE
  tSQL VARCHAR2(99)
  pVal INT := 2;
  
  BEGIN
  tSQL := 
             'SELECT * ' ||
             '  FROM dual ' ||
             ' WHERE col1 =: iVal ' ||
             '   AND col2 IN (SELECT col2 ' ||
             '                  FROM dual  ' ||
             '                 WHERE col1 =: iVal) ' ||
             ' UNION ' ||
             ' SELECT * ' ||
             '   FROM dual ' ||
             '  WHERE col1 =: iVal';
  
  EXECUTE IMMEDIATE tSQL 
  USING pVal, pVal, pVal;  -- Is there a way to avoid having to rewrite the same bind variable argument three times since the value is the same?
  
  END;

  Is there a way to avoid having to rewrite the same argument three times bind variable as the value is the same?

  Etbin wrote:
  http://docs.Oracle.com/CD/E11882_01/AppDev.112/e25519/dynamic.htm#BHCHIHEJ says:
  Placeholders are associated with bind variable in the USING clause of position, and not by name.

  Concerning

  Etbin

  The exception to this rule is if the SQL statement is an anonymous block or a call statement. In this case, the repetition of the names of the placeholder is significant.

  http://docs.Oracle.com/CD/E11882_01/AppDev.112/e25519/dynamic.htm#CHDFHEAG

  For example, the following will fail with ORA-01008: not all variables

  declare
   v_cnt number;
  begin
    execute immediate 'select count(*) from dual where 1 = :B1 and 2 > :B1'
    into v_cnt using 1;
    dbms_output.put_line(v_cnt);
  end;
  

  However, the following will succeed because the SQL code is in fact an anonymous block:

  begin
    execute immediate 'declare
                         v_cnt number;
                       begin
                         select count(*)
                         into v_cnt
                         from dual
                         where 1 = :B1 and 2 > :B1;
                         dbms_output.put_line(v_cnt);
                       end;'
    using 1;
  end;
  

  Pretty cool stuff.

• bind variables and dynamic sql

  Hi all
  
  Here's my situation:
  
  I have a query with 2 bind variable: the FROM clause also uses a variable binding!
  
  

  PROCEDURE describe_columns(p_curr_tablename VARCHAR(50), p_curr_intentseq NUMBER)
     IS
        l_cur     INTEGER;
        l_query   VARCHAR (100);
     BEGIN
        l_query :=
           'select * from :table_name where ibmsnap_intentseq = :sequencenr';
        l_cur := DBMS_SQL.OPEN_CURSOR;
        DBMS_OUTPUT.PUT_LINE (p_curr_tablename);
        DBMS_OUTPUT.PUT_LINE (p_curr_intentseq);
        DBMS_OUTPUT.PUT_LINE (l_query);
        DBMS_SQL.PARSE (l_cur, l_query, DBMS_SQL.V7);
        DBMS_SQL.bind_variable (l_cur, ':table_name', p_curr_tablename);
        DBMS_SQL.bind_variable (l_cur, ':sequencenr', p_curr_intentseq);
        DBMS_SQL.DESCRIBE_COLUMNS (l_cur, g_count, g_desc_tab);
        DBMS_SQL.CLOSE_CURSOR (l_cur);
     EXCEPTION
        WHEN OTHERS
        THEN
           DBMS_OUTPUT.put_line ('DF-EXCEPTION: ' || SQLERRM);
           DBMS_OUTPUT.put_line (
              'DF-EXCEPTION: ' || DBMS_UTILITY.FORMAT_ERROR_BACKTRACE
           );
  
           IF DBMS_SQL.IS_OPEN (l_cur)
           THEN
              DBMS_SQL.CLOSE_CURSOR (l_cur);
           END IF;
     --         RAISE;
     END;

  and the output is:
  

  CD_B136V4_NEW
  16
   select * from :table_name where ibmsnap_intentseq = :intentseq
  DF-EXCEPTION: ORA-00903: invalid table name
  DF-EXCEPTION: ORA-06512: in "SYS.DBMS_SYS_SQL", line 906

  So is the problem that I want to use a variable binding for the name of the table?
  
  I'd appreciate any help!
  Thank you!

  http://asktom.Oracle.com/pls/asktom/f?p=100:11:0:P11_QUESTION_ID:227413938857

  Identifiers cannot be used as variable bind - never. Identifiers must be "hard-coded".
  in the query.

  I can't put in a link for "emp" variable because I can't use a string
  constant for emp.

  The reason is quite simple - a bind variable query is parsed and optimized once
  variables are evaluated before linking. If I could code:

  Select * from: bind_x

  the optimzer would not have an idea of what will come with, security (access rights)
  could be evaluated and so on. We could not develop a plan for this query - not
  enough information. Therefore, no variable bind for identifiers.

• Ask about the creation and filling I$ table on different condition

  Hello
  I have a question about the creation and filling I$ table on a different condition. In which condition the I$ table creation? And these conditions are given below:
  
  (1) * source and transit area * are on the same server (that is to say target is located on another server)
  (2) * gathering and target area * are on the same server (IE source is on another server)
  (3) * source, transit area and target * are * different 3 * Server
  Source 4), area transit and target are on the same server
  Thank you

  I'm not quite clear to your question. Always try my best to erase it.

  In your all over requirement I$ table will be created.
  If the same staging as target (a database, a user) then all temporary tables are created in this user
  If the scaffolding is different from the target (a database, two users (A, B)), then all temporary tables will be created under that user A (lets consider) and the data will be inserted into the target table that is present to user B

  Staging is different from the target (two database, two users (A1, A2), architecture not recommended) if all temporary tables will be created under that user A1 (A1 of the databases) and the data will be inserted into the target table which is present in user A2 (A2 data base)

  If the source, staging, the target will be under a database then no. LKM is required, IKM is sufficient to load the data into the target. Especially for this, you can see an example given by Craig.
  http://S3.amazonaws.com/ora/ODI-Simple_SELECT_and_INSERT-interface.swf

  Thank you.

• bind variables and v$ sqlarea

  Hello
  
  How to distinguish the variable bind to static expression
  in v$ sqlarea? Is this possible?
  Please explain
  
  Best regards
  Paul

  Hello

  You acknowledge that bind variable by ':' in front, you cannot merge with literals.

  Best regards
  Nikolai

• Cursors for parent and child, bind variable and library cache

  I was going through the documentation to understand the difference between the parent and the child cursors. Surprisingly, there's not too much help for this. I was able to collect the following information about this
  
  For each statement SQL cache library contains a cursor "parent" for the text of the SQL statement. The parent cursor is composed of a "handle" that can be searched by the hash value via the library cache hash table and an «object' which contains pointers to each of its «child» cursors Each cursor of the child is also composed of a handle and an object. The child object is composed of two segments numbered from 0 to 6. Lot 0 contains all the credentials for a particular version of the SQL statement and lot 6 contains the execution plan. This distinction between parent and child cursors is maintained even when there is only one version of each SQL statement.
  
  Lets say that 2 LMD were fired with the same set of variables bind (names of variables were same but differed from the value.) The only difference between the 2 LMD was the value of the variable binding) and under the same conditions of load.
  
  These DML 2 would be a sliders 2 children of one parent only cursors.
  
  Please tell me detailed documentation on the subject, so my question is too elementary
  
  Kind regards
  Vishal

  I'm not sure how useful jumping in stuff like bunch 0 and 6 bunch is in terms of understanding what is a parent and what is a child cursor.
  This quote seems to come from Steve Adams - http://www.ixora.com.au/q+a/0104/19005414.htm
  It's a good idea to cite your references.

  I'll give it a go.

  A cursor is a lot of information stored in memory on a SQL statement.

  The basic information for a parent cursor is the text of the SQL statement - exact matches of the statement can only share the parent cursor.

  The cursor of the child is really on the implementation plan specific for a statement and the different settings and parameters that caused this plan to be generated.

  There are a whole bunch of reasons why the executions of the same SQL statement may or may not reuse the existing child cursors.

  In your example 2 statements that differ by the variable binding are likely to lead to different children, although there are factors that can lead to lie different values, do not share the same children among whom for example, the length of the dregs, Adaptive setting cursor_sharing = similar and histograms, or new features like cursor sharing (on subsequent runs of renowned sql running suboptimal initially).

  It might be useful to see V$ SQL_SHARED_CURSOR. This shows the disparities that cause children to not be shared. There are more than 60 columns in this view which gives an indication of the number of factors that can influence.
  http://download.Oracle.com/docs/CD/E11882_01/server.112/e17110/dynviews_3059.htm#REFRN30254

  You might want to look here the criteria for sharing SQL:
  http://download.Oracle.com/docs/CD/E11882_01/server.112/e16638/memory.htm#i40017

  Away from the main documentation, perhaps some of the writings of the optimizer Development Group could help?
  http://blogs.Oracle.com/mt/mt-search.cgi?blog_id=3361&tag=cursor%20sharing&limit=20

  Christian Antognini described this area very well in the "Oracle Performance Troubleshooting Guide".

  Published by: Dom Brooks on February 24, 2011 16:45

• bind variables and expression evaluation

  Hi friends,

  I was looking at a query that uses a bad plan. DB is 11.2.0.3 with active user bind peeking. It is a simplified version showing the problem:

  Select egp.bsn

  , egp.klantnummer as 'Persoonsnummer '.

  , egp.samengesteldenaam as 'Samengesteldenaam '.

  , egp.geboortedatum as 'Geboortedatum.

  of pr_eigenschappen2 egp

  where

  (egp.bsn =: b1 or: b2 is null)

  and rownum < 51

  EGP. BSN is varchar2 (10) and has a high selectivity (almost unique) and is indexed btree. table and index have adequate statistics.

  When it is run with b1: = 928818 and b2: = 928818 (linked both 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 'Persoonsnummer '.

  , egp.samengesteldenaam as 'Samengesteldenaam '.

  , egp.geboortedatum as 'Geboortedatum.

  of pr_eigenschappen2 egp

  where

  (= egp.bsn: b1 or 928818 a null value)

  and rownum < 51

  
  

  the index on the bsn is used, and the query does not 3.9 seconds but 1 millisecond.
  

  
  

  If I had a choice, the query would be different. I don't want to talk about the reason for the request, I would like to know why the optimizer does not use the index in the first case.
  

  
  

  
  

  Jan-marten,

  as Hoek wrote: "the optimizer must take into account the fact that the bind peut var be null, and then a full crawl is required...". ». For the bsn = part: b1 a systematic index scan range would be a good idea, but for: b1 is null, there is only one relevant case producing a result: NULL IS NULL and this condition the CBO only a full table scan or a full scan of the index taking into account (after all a complete analysis of the index may also be called 'index range scan across the table' - but that would be contrary to the 'Beach' in its name).

  By the way: I think that the trick of gather_plan_statistics is not very useful in the test case since you do not use display_cursor with allstats format. He might even have a negative impact on performance since statistical rowsource are quite expensive - depending on the timing of your OS routine. I think that Mr. Lewis has written something on this effect, in his notebook.

  Concerning

  Martin

• asking of bind variable where none is needed

  Hello
  
  I'm still working these regexp Date_Time project.
  
  I have a problem where oracle calls a variable of liaison where there is no need to none that I see. I am trying to capture several times to date in a column and their formatting in a default format used by oracle. Here's what I got works before I wrap in the TO_DATE function
  
  There are many when there but I use one here.
  
  Select the case sensitive option
  
  When regexp_substr (date_time,'^ (0?) [1-9] | 1 [0-2]) / (0? [1-9] | [1-2] (([0-9] | 3 [0-1]) / 9 [[: digit:]] {4}') is not null
  then regexp_substr (date_time,'^ (0?) [1-9] | 1 [0-2]) / (0? [1-9] | [1-2] (([0-9] | 3 [0-1]) / 9 [[: digit:]] {4}')
  
  of another Date_Time
  end up like new_time
  of raw_data;
  
  
  The works of above statement
  
  Now when I want to fit the date I found this:
  
  
  Select the case sensitive option
  
  When regexp_substr (date_time,'^ (0?) [1-9] | 1 [0-2]) / (0? [1-9] | [1-2] (([0-9] | 3 [0-1]) / 9 [[: digit:]] {4}') is not null
  then TO_DATE ('regexp_substr (date_time,'^ (0?)) [1-9] | 1 [0-2]) / (0? [1-9] | [1-2] ((([0-9] | 3 [0-1]) / 9 [[: digit:]] {4}') ',' MM/DD/YYYY ')
  
  of another Date_Time
  end up like new_time
  of raw_data;
  
  
  I get a request to insert a value for the digit as a variable binding. The figure must be filled when instruction when she does not return null when a date is found.
  
  
  Could someone please tell me even if what I have written here is still possible or make a suggestion to the syntax to work around this problem?
  
  All this will be incorporated into an update statement later.
  
  I use this on sql, oracle 11g developer.
  
  
  Thank you for your help in this matter in advance.
  
  Kind regards
  
  Al

  You have your apostrophes in the wrong place

  then TO_DATE('regexp_substr)

  GP >

• query about bind variable

  Can I change the value of a variable binding within a pl/sql block. I tried something like
  
  variable number of mybind;
  run: mybind: = 20;
  
  declare
  run: mybind: =: mybind + 1;
  my_variable number: = 4 *: mybind;
  
  Start
  
  dbms_output.put_line ($my_var);
  end;
  
  But it does not work. Help, please.
  Thanks in advance
  
  Published by: user11930797 on April 22, 2010 03:02

  Define a local pl/sql variable in your statement and assign the SQL more variable to the local variable. The local variable can act as a variable binding to any SQL that you run later in your pl/sql block.

  variable mybind number;
  execute :mybind := 20;
  
  declare
    l_mybind number := :mybind+1;
    my_var number := 4*l_mybind;
  
  begin
  
    -- Here you can modify the local varaible
    dbms_output.put_line(my_var);
  end;
  /
  show err
  

• Problem with bind variable and as operator usage

  Hi all

  I use JDeveloper Version - 11.1.2.4.39.64.36.1 .

  
  

  While implementing the search functionality in the hierarchical Viewer, I created a link in the underlying t variable, created to find, due east of the request-

  
  

  SELECT XxamAnkitObjects.ID,

  XxamAnkitObjects.OBJECT_NAME,

  XxamAnkitObjects.OBJECT_TYPE,

  XxamAnkitObjects.PARENT,

  XxamAnkitObjects.PARENT_ID,

  XxamAnkitObjects.PARENT_TYPE

  OF XXAM_ANKIT_OBJECTS XxamAnkitObjects

  WHERE object_name like ' %: o_name ".

  What I'm trying to accomplish here, it is that the input provided by the user in the search box must match with the object_name in the table.

  During execution, I met the following error (from newspapers WLS)-

  < QueryCollection > < buildResultSet > [598] java.sql.SQLException: try to set a parameter name that does not intervene in the SQL: o_name

  at oracle.jdbc.driver.OraclePreparedStatement.setNullAtName(OraclePreparedStatement.java:5384)

  at oracle.jdbc.driver.OraclePreparedStatementWrapper.setNullAtName(OraclePreparedStatementWrapper.java:1451)

  The following query has been generated during the operation of a research-

  < ViewObjectImpl > < buildQuery > [593] SELECT XxamAnkitObjects.ID, XxamAnkitObjects.OBJECT_NAME, XxamAnkitObjects.OBJECT_TYPE, XxamAnkitObjects.PARENT, XxamAnkitObjects.PARENT_ID, XxamAnkitObjects.PARENT_TYPE XXAM_ANKIT_OBJECTS XxamAnkitObjects WHERE object_name like ' %: o_name ".

  < ViewObjectImpl > < bindParametersForCollection > [594] params for ViewObject Bind: [model.vo.ObjectNameSearch] AppModule.ObjectNameSearch1

  Advice kindly the way ahead.

  Best regards

  Ankit Gupta

  The problem is that you used quotes around the variable binding. Try

  SELECT XxamAnkitObjects.ID,
         XxamAnkitObjects.OBJECT_NAME,
         XxamAnkitObjects.OBJECT_TYPE,
         XxamAnkitObjects.PARENT,
         XxamAnkitObjects.PARENT_ID,
         XxamAnkitObjects.PARENT_TYPE
  FROM XXAM_ANKIT_OBJECTS XxamAnkitObjects
  WHERE object_name like '%' || :o_name || '%'
  

  A note: this type of query will do a full table scan, as the searches with wildcards to the left cannot use a regular index. If you have multiple lines, this will impact on the research persormance hughe!

  Timo

• Ask about cell comments and annotations

  Hello
  
  We cell annotations and comments associated with the cell in the form? When you copy data, I get these annotations and comments in the new locations?
  
  Please forgive me if you do not receive my questions.
  
  I really appreciate your help
  
  
  Thank you

  When you copy data using a calc script, that it will not be copied, you can use the feature to copy data to copy the data but also to copy annotations and ultimately supporting detail and text in the cell. You can't copy annotations unit planning.

  Date of arrival:
  http://download.Oracle.com/docs/CD/E12825_01/EPM.111/hp_admin/copy_det.html

  See you soon...!

• Performance tests: bind variables

  When you write a SQL for the application, I want to do some performance testing of SQL before providing to JAVA developers. I understand that I need to test using bind variables, can someone guide me how do? What are the best tools out there to achieve? Please provide some guidance. Thank you!

  Rinne says:
  I read more about bind variable and I can test the use of bind variables. I understand that testing SQL using bind variables is a closer representation of the real world. Even when queries have large tables, the performance would be similar if I run the query using literals twice (to avoid hard analysis) compared to tests with bind variables? I am trying to understand more thoroughly the need for tests with bind variables. Why we take more time than the other? Thank you!

  The main thing is that the opimizer will / can do if bind variables different optimization techniques are used or not.
  There are two contradictory effects its regarding the binding settings.

  Effect 1: Reuse of cursor
  If the same is done again and again and again. Maybe different sessions. Then using binding settings is essential. Why? Because the same cursor can be reused, which saves a lot of time for analysis. This occurs mainly in OLTP systems. The idea behind this is that to do the same action, just for a different ID (ID in order for example) will result in an identical implementation plan.

  The result: Faster analysis time and less consumption of memory, because the same cursor can be resused between different sessions.

  Effect 2: Correct assumptions

  According to a filter expression, some using the value of the OBC will make an assumption based on statistical data the number of rows is returned because of this expression and the value.
  Speculation between a literal value and a bound value may be different. In many cases exist technical opimization (bind peeking etc.) to the same literal conjecture binded proposal.

  But there are exceptions, for example a condition such as the following will result in different estimates

  column between 10 and 20
  

  column between :P1 and :P2
  

  There are as well other effects.

  Result: The CBO can make assumptions better if literals. But most of the cases the proposal is identical.

  Conclusion: Literal values are useful if you do large queries where the output size depends strongly on the parameters provided, and where you run that very few of these (OLAP) queries.
  Binding settings are usfull when the same execution (OLTP) need a grand plan number of queries.