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• Ensure this soft analysis the use of Bind variables

  Hi Experts,
  
  I have a request when the query is prepared dynamically in Java code and if I take the query and run it from SQL Navigator, it takes a long time to prepare the statement and then execute it quickly. I think we can use dynamic SQL statements and bind variable to improve performance here. However, I tried to do a PDS to check my understanding. I created 2 procedures
  
  1. mode of operation

  CREATE OR REPLACE PROCEDURE sp_static
  (id IN NUMBER, 
   name in VARCHAR2)
  IS 
  TYPE r_curs_type is REF CURSOR;
  C1 r_curs_type;
  BEGIN
  
  OPEN C1
  FOR
  SELECT * FROM TABLE WHERE columname = id
  
  CLOSE C1;
  
  END;

  2. mode of operation

  CREATE PROCEDURE sp_dyanmic
  (id IN NUMBER, 
   name in VARCHAR2)
  IS 
  TYPE r_curs_type is REF CURSOR;
  C1 r_curs_type;
  BEGIN
  
  OPEN C1 FOR 'SELECT * FROM TABLE WHERE columnanme = :U1' 
  USING ID;
  
  CLOSE C1;
  END;

  To my amazement, there is no difference in the duration of execution of these procedures when I ran the with multiple entries.
  
  Please note-
  1. I have not access to trace files :-(
  2. I want to just make sure there will be improved performance before starting the real work, given that some efforts provided by moving the logic of all its activities inside and the use of bind variables.
  
  If you can suggest a strategy to ensure performance gains, it will be extremely useful...
  
  Thanks in advance!
  Concerning

  Hello

  (1) it's true, procedure 1 also uses a variable binding
  (2) you seem to be confused about the very basic concepts here

  Dynamic SQL is something like this:

  create or replace FUNCTION f (l_table_name VARCHAR2) RETURN NUMBER
  IS
    l_result NUMBER;
  BEGIN
    EXECUTE IMMEDIATE 'SELECT COUNT(*) FROM ' || l_table_name  INTO l_result;
    return l_result;
  END;
  

  In this example, since you do not know the name of the table to the execution table, everything you can
  is dynamic SQL. As you can see, neither of your two procedures is like that.

  Dynamic SQL is used when you do not know what columns you want to select, or who
  etc. to the execution table. You can also use dynamic SQL statements to force analysis. You can not use
  to avoid parsing, binding or not binding.

  Best regards
  Nikolai

• Use the bind variable in example of a clause giving questions

  create or replace procedure pr_mbk (p_val in number)
  is
  CROR type is ref cursor;
  REF CROR;
  type numbertype is the table of index number of pls_integer;
  numtype numbertype.
  v_str varchar2 (2000): = 'select empno from emp sample(:val) ";
  Start
  Open ref for v_str using p_val;
  Close ref;
  end;
  /
  
  Successfully compiled.
  
  But when I run the same
  
  Exec pr_mbk (10);
  
  ERROR on line 1:
  ORA-00933: SQL not correctly completed command.
  ORA-06512: at "SCOTT. PR_MBK', line 9
  ORA-06512: at line 1
  
  My question is can use us Bind variables within a sample clause.
  
  Receive your answer.
  
  Thank you
  Madhu K.

  I guess that SAMPLE is considered as a special case, and is not considered as something that takes a 'value' in the same way as values in where clause or values in the query itself.
  Let's face it, the SAMPLE is not the standard SQL syntax and is probably something Oracle implements in a separate thread for processing SQL itself i.e. engine Oracle saying to herself... "I will remember this bit of the sample until I questioned the data using the SQL engine, so I'll take a suitable sample of the results," but it's the SQL engine treats the binding of values and the Oracle process that awaits the results taste, knows nothing of the binding values in it's special EXAMPLE of keyword.

• The use of bind variables (in & out) with sql dynamic

  I have a table that contains code snippets to make postings on a set of pl/sql database. what the code does is basically receives an ID and returns a number of errors found.
  To run the code, I use dynamic sql with two bind variables.
  
  When codes consists of a simpel query, it works like a charm, for example with this code:
  

  BEGIN
     SELECT COUNT (1)
     INTO :1
     FROM articles atl
     WHERE ATL.CSE_ID = :2 AND cgp_id IS NULL;
  END;

  However when I get to post more complexes that must perform calculations or run several queries I run into trouble.
  I have boiled down the problem into that:
  

  DECLARE
     counter   NUMBER;
     my_id     NUMBER := 61;
  BEGIN
     EXECUTE IMMEDIATE ('
        declare 
           some_var number;
        begin
        
        select 1 into some_var from dual
        where :2 = 61; 
        
        :1 := :2;
        end;
  ')
        USING OUT counter, IN my_id;
  
     DBMS_OUTPUT.put_line (counter || '-' || my_id);
  END;

  This code is not really make sense, but it's just to show you what is the problem. When I run this code, I get the error
  ORA-6537 ON bind variable linked to a position IN
  
  The error doesn't seem wise,: 2 is the only one IN bind variable and it is only used in a where clause clause.
  As soon as I remove this where clause, the code works again (giving me 61-61, in case you want to know).
  
  Any idea what goes wrong? I just use bind variables in a way that you're not supposed to use it?
  
  I'm using Oracle Database 11 g Enterprise Edition Release 11.2.0.3.0 - 64 bit

  Correction. With immediate execution , the binding is in position, but binds do not need to be repeated. My statement above is incorrect...

  You must link only once - but bind by position. And the connection must correspond to the use of the variable binding.

  If the connection never variable assigns a value in the code, link by in.

  If the binding variable assigns a value in the code, link as OUTPUT.

  If the binding variable assigns a value and is used a variable in another statement in the code, link as IN OUT.

  For example

  SQL> create or replace procedure FooProc is
    2          cnt     number;
    3          id      number := 61;
    4  begin
    5          execute immediate
    6  'declare
    7          n       number;
    8  begin
    9          select
   10                  1 into n
   11          from dual
   12          where :var1 = 61;       --// var1 is used as IN
   13
   14          :var2 := n * :var1;     --// var2 is used as OUT and var1 as IN
   15          :var2 := -1 * :var2;    --// var2 is used as OUT and IN
   16  end;
   17  '
   18          using
   19                  in out id, in out cnt;  --// must reflect usage above
   20
   21          DBMS_OUTPUT.put_line ( 'cnt='||cnt || ' id=' || id);
   22  end;
   23  /
  
  Procedure created.
  
  SQL>
  SQL> exec FooProc
  cnt=-61 id=61
  
  PL/SQL procedure successfully completed.
  
  SQL> 
  

• The use of bind variables in dynamic query created for Ref Cursor

  Hello
  
  I'm in a situation where there is a Ref cursor to which the query is built execution based on a loop. This is why the number of links would be known until the program runs.
  The application is currently using literals instead of bind variables.
  
  code snippet of the above is
  strSql: = "select * from emp where 1 = 1 and ().
  
  loop cursor1
  If cond is true then
  strSql = strSql | "ename = ' |" Cursor1.ColumnName;
  end loop;
  
  Open cursor2 for strSql;
  
  How to use links in the example above.

  sb92075 wrote:

  user13019948 wrote:
  Hello

  Here is the code I have my trying to change literal-based link to the base.

  What do you mean by "based bind?

  who, what, how determines the values to be 'bound '?

  He's referring to the coding style. He is currently using concatenated literal, and the goal is to change it to use the bindings.

  If I understand this it is known as method 4 dynamic SQL and requires DBMS_SQL. There are examples autour but they vary according to the type of statement being generated - SELECT statements require column lists to be parsed, unlike the INSERT/UPDATE/DELETE.

  This came up recently on my current project and I hit a demo. Here a table of names and values accepted procedure and had to build these in a single WHERE clause along the lines of

  AND t_names(i) = t_values(i)
  

  for an undetermined number of elements in the array. For this demonstration, I used a table that we called "attribute" (don't ask) which has columns including 'attribute_id' and 'name', and I need to build a query along the lines of

  select description from attribute where attribute_id = :b1 and name = :b2
  

  by the way '1012' and 'ISIN' respectively. (I use a table better and after a CREATE statement for her but I have to rush right now, sorry).

  declare
     k_sql_base        constant varchar2(500) := 'select description from attribute';
  
     t_names           constant varchar2_t := varchar2_t('attribute_id',  'name');
     t_values          constant varchar2_t := varchar2_t('1012',          'ISIN');
  
     l_sql             varchar2(500) := k_sql_base;
     l_rows_fetched    integer := 0;
     l_value           varchar2(4000);
  
     l_cursor_handle   integer;
  
  begin
     -- Construct the SQL statement with column names and bind variables e.g.
     -- 'select description from mars.attribute where attribute_id = :b1 and name = :b2'
     for i in t_names.first .. t_names.last loop
        l_sql := l_sql ||
           case i
              when t_names.first then ' where ' else ' and '
           end ||
           t_names(i) || ' = :b' || i;
     end loop;
  
     dbms_output.put_line('SQL statment = ' || l_sql); 
  
     -- Parse the statement we built above (the remaining steps require a parsed cursor):
     l_cursor_handle := dbms_sql.open_cursor;
     dbms_sql.parse(l_cursor_handle, l_sql, dbms_sql.native);
  
     -- Associate the 1st column of output with variable l_value - required for SELECT statements:
     -- (actually the 3rd param here 'column' seems to be only used to get a datatype, in this case we want a string -
     -- dbms_sql.column_value actually extracts the value into a specified variable, which can be different.
     -- All examples in the documentation pass a local variable without further comment, so not entirely clear what this does other than set the output datatype.)
     dbms_sql.define_column(l_cursor_handle, 1, l_value, 4000);
  
     -- Now go through values array binding actual values to :bn variables in the cursor (similar to USING clause of EXECUTE IMMEDIATE)
     for i in t_values.first .. t_values.last loop
        dbms_sql.bind_variable(l_cursor_handle, ':b'||i, t_values(i));
        dbms_output.put_line('Bound :b'||i || ' as ' || t_values(i));
     end loop;
  
     -- Open the cursor and fetch the result (no loop here because we are expecting a single-row result):
     l_rows_fetched := dbms_sql.execute_and_fetch(l_cursor_handle);
  
     -- 'Returns value of the cursor element for a given position in a cursor'
     -- Copy the value of column 1 to variable l_value (has to match
     -- dbms_sql.column_value(l_cursor_handle, 1, l_value);
     dbms_sql.column_value(l_cursor_handle, 1, l_value);
  
     dbms_output.put_line('Result = ''' || l_value || '''');
  
     dbms_sql.close_cursor(l_cursor_handle);
  end;
  

  Hope that helps...

• Use of bind variables in the repository

  All,
  
  Our client has a requirement that they need the sales this year of sales vs. last year passing year as a guest.
  I can't use BI built in function to get early start or this year last year because our calendar dates are not standard. So I have to this day of dim query table to see e.g. for whats 2010 is the start date and so on...
  
  To do this, I created a variable repository to hold these values using SQL. I want to know is can I use a binding to this SQL variable so that when the user passes year I can feed that year in this SQL and it will provide me with correct start and the end date for this year and last year.
  
  Thanks in advance

  Yes. We can pass a value to what the user selects the guest. To do this you have create a session variable with "enable any user to set the value". Prompt properties for the year column choose "Ask the Variable" for whole Variable. And the use of content filtering year = ' valueof (NQ_SESSION.myVariable).

  Let me know if it worked.

  Kind regards
  Jay

• 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

• The use of bind variables in the application process

  Bind variables refer to elements of session state supported in queries in an application request process?
  
  All the examples I see show how to pass client side values using the $v () function and the htmldb_get object addParam method and refer to them using the wwv_flow.g_xNN variables, but already available in session state values, I should be able to use them directly in the process, right?
  
  Thank you

  Yes, they are supported.

  Denes Kubicek
  -------------------------------------------------------------------
  http://deneskubicek.blogspot.com/
  http://www.Opal-consulting.de/training
  http://Apex.Oracle.com/pls/OTN/f?p=31517:1
  http://www.Amazon.de/Oracle-Apex-XE-Praxis/DP/3826655494
  -------------------------------------------------------------------

• The use of bind variables with XMLTABLE?

  I tried to use bind variables with xmltable statement. Here, my unit test:
  
  create or replace function wsdltest return xmltype as
  l_dummy xmltype.
  CLOB l_stt;
  L_Name varchar2 (500);
  CLOB l_xml;
  BEGIN
  l_xml: =.
  ' < name of definitions = 'F1' targetNamespace = "http://xmlns.oracle.com/orawsv/XFILES/F1" xmlns = "http://schemas.xmlsoap.org/wsdl/" xmlns:tns = "http://xmlns.oracle.com/orawsv/XFILES/F1" container = "http://www.w3.org/2001/XMLSchema" xmlns:soap = "http://schemas.xmlsoap.org/wsdl/soap/" >
  < types >
  < xsd: Schema targetNamespace = "http://xmlns.oracle.com/orawsv/XFILES/F1" elementFormDefault = "qualified" >
  < xsd: element name = "SVARCHAR2-F1Input" >
  < xsd: complexType >
  < xsd: SEQUENCE >
  < xsd: element name = "A VARCHAR2 IN" type = "xsd: String" / >
  < / xsd: SEQUENCE >
  < / xsd: complexType >
  < / xsd: element >
  < xsd: element name = "F1Output" >
  < xsd: complexType >
  < xsd: SEQUENCE >
  < xsd: element name = "RETURN" type = "xsd: String" / >
  < / xsd: SEQUENCE >
  < / xsd: complexType >
  < / xsd: element >
  < / xsd: Schema >
  < / types >
  < name of message = "F1InputMessage" >
  < name of part = "parameters" element = "tns:SVARCHAR2 - F1Input" / >
  < / message >
  < name of message = "F1OutputMessage" >
  < name of part = "parameters" element = "tns:F1Output" / >
  < / message >
  < portType name = "F1PortType" >
  < operation name = "F1" >
  < input message = "tns:F1InputMessage" / >
  < output message = "tns:F1OutputMessage" / >
  < / operation >
  < / portType >
  < connection name = "F1Binding" type = "tns:F1PortType" >
  < style: binding soap = transport "document" = "http://schemas.xmlsoap.org/soap/http" / >
  < operation name = "F1" >
  < soap: operation soapAction = "F1" / >
  < input >
  < soap body parts: = 'settings' use = "literal" / >
  < / Entry >
  < output >
  < soap body parts: = 'settings' use = "literal" / >
  < / output >
  < / operation >
  < / binding >
  < service name = "F1Service" >
  < documentation > Oracle Web Service < / documentation >
  < name of port = "F1Port" binding = "tns:F1Binding" >
  < soap: address location = "http://localhost: 8080/orawsv/XFILES/F1" / >
  < / port >
  < / service >
  < / definitions > ';
  
  -OK
  l_stt: = ' select * from xmltable (XMLNAMESPACES ("http://www.w3.org/2001/XMLSchema" AS "XSD", default "http://schemas.xmlsoap.org/wsdl/"),)
  [' / / definitions/types/XSD:schema/XSD:element[@name="SVARCHAR2-F1Input ']"
  by the way xmltype(:1)
  columns
  path of xmltype AB ".") you;
  --
  EXECUTE IMMEDIATE l_stt INTO l_dummy using l_xml;
  
  -ERROR ORA-01006
  L_Name: = ' 'SVARCHAR2-F1Input "";
  l_stt: = ' select * from xmltable (XMLNAMESPACES ("http://www.w3.org/2001/XMLSchema" AS "XSD", default "http://schemas.xmlsoap.org/wsdl/"),)
  [/ / definitions/types/XSD:schema/XSD:element[@name=:2] "
  by the way xmltype(:1)
  columns
  path of xmltype AB ".") you;
  --
  EXECUTE IMMEDIATE l_stt INTO l_dummy using l_xml, l_name;
  
  Return l_dummy;
  END;
  
  Any idea?
  
  Thanks in advance
  Cyryl

  You can try something like

  declare
    l_dummy xmltype;
    l_stt clob;
    l_name varchar2(500);
    l_xml clob;
  BEGIN
  l_xml :=
  '
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  Oracle Web Service
  
  
  
  
  ';
  l_stt := q'~ select *
    from xmltable( XMLNAMESPACES( 'http://www.w3.org/2001/XMLSchema' AS "XSD", default 'http://schemas.xmlsoap.org/wsdl/'),
                 '/definitions/types/XSD:schema/XSD:element'
                 passing xmltype( :2 )
                 columns
                 ab xmltype path '.' ) t
       where extractvalue( ab, '/element/@name', 'xmlns="http://www.w3.org/2001/XMLSchema"' ) = :1
   ~';
  l_name := 'SVARCHAR2-F1Input';
    EXECUTE IMMEDIATE to_char( l_stt ) INTO l_dummy using l_xml, l_name;
    dbms_output.put_line( l_dummy.getstringval() );
  end;
  /
  

• The use of bind variable in this case

  Hello
  
  I want to use the variable binding": x' implicit cursor like this:
  
  I'm in
  ("select object_name
  to all_object where object_id =: x' using the I)
  loop
  ...
  end loop;
  
  While the engine has no need to analyze each time training?
  
  Kind regards
  Igor

  IgorKSCon wrote:
  I have two tables that's BILL is another LINE that is connected. One Bill have more lines.

  My files are like this

  BILL LINE CASH CARD OTHER
  18___3___0___10___12
  18___4___30___0___0
  18___5___0___0___0

  In the loop or something I would insert records in another table like this

  BILL LINE CASH CARD OTHER
  18___3___0___10___0
  18___3___0___0___12
  18___4___30___0___0
  18___5___0___0___0

  What is the best solution for this scenario?

  I am assuming that you want to insert a record in the other table for each no zero value of one of the card, the species, the other columns. If all three are 0, then insert a line anyway. Note the code below does not account for the possibility of NULL values in the data, you may need to adjust if it's a possibility.

  SQL> SELECT * FROM bill1;
  
        BILL       LINE       CARD       CASH      OTHER
  ---------- ---------- ---------- ---------- ----------
          18          3          0         10         12
          18          4         30          0          0
          18          5          0          0          0
  
  SQL> INSERT ALL
    2     WHEN card != 0 THEN
    3        INTO bill2 VALUES (bill, line, card, 0, 0)
    4     WHEN cash != 0 THEN
    5        INTO bill2 VALUES (bill, line, 0, cash, 0)
    6     WHEN other != 0 THEN
    7        INTO bill2 VALUES (bill, line, 0, 0, other)
    8     WHEN other = 0 and card = 0 and cash = 0 THEN
    9        INTO bill2 VALUES (bill, line, card, cash, other)
   10  SELECT bill, line, card, cash, other
   11  FROM bill1;
  
  4 rows created.
  
  SQL> SELECT * FROM bill2;
  
        BILL       LINE       CARD       CASH      OTHER
  ---------- ---------- ---------- ---------- ----------
          18          4         30          0          0
          18          3          0         10          0
          18          3          0          0         12
          18          5          0          0          0
  

  John

• The use of bind variables in the HTML source region

  < nl >
  
  workspace http://apex.Oracle.com/pls/apex/f?p=49417:1: SVK demo/demo
  
  I have problems integrating an element variable in an embedded HTML string that should popup a video mode when the button is pressed.
  
  Element 1 works very well and it's what I want to accomplish with point 2, but when I pass: p1_url, it does not work even if the content of the equivalent of two text boxes.

  svk1965 wrote:
  
  Hi fac586:

  You who modifies the code to use * $('_#foo').html ($v ('P1_SAVED_ITEM2')); * ?? If so, I think that solved my problem here. I tested it and it seems to work everytime now. Thank you

  Yes. It was very late and I could not spend more time on a detailed explanation. foo is the static region ID, I assigned to the masked area of the HTML to use as a jQuery selector.

• The use of Bind Variables

  I want to execute a dynamic SQL code something like this:
  
  immediate execution
  ' insert into tgt
  Select DECODE(:1,'A','A','B'), SUBSTR(:1,1,1)
  the CBC
  where code =: 1
  and id =: 2' using p1, p2;
  
  I want to use p1 in several places. My restriction is that I can not change using the clause. He always "will operate p1, p2 ' because it's generic program.
  
  How can I do without change using my article.
  
  the error it gives is ORA-01008: not all variables ORA-06512

  Hello

  Something like this maybe:

  execute immediate
  'insert into tgt
  WITH data_tab AS (
  SELECT :1 col1, :2 col2 FROM DUAL)
  select DECODE(data_tab.col1,'A','A','B') , SUBSTR(data_tab.col1,1,1)
  from src
  CROSS JOIN data_tab
  where code = data_tab.col1
  and id = data_tab.col2' using p1, p2;
  

  Not tested

• Using a Bind Variable in the FROM of a SQL statement part?

  Hi all
  
  I have a problem, I am trying to execute a SQL statement. However, I need the FROM part of the SQL statement in a variable binding. This is because the end user will have to choose between 2 views of database.
  
  I tried this:
  Select CON_ID from: P23_DB_NAME where CON_LEGACY_ID =: P23_CONLEG_NO
  
  I had no chance. The error I got was,
  '+ The query cannot be parsed in the generator. If you believe that your request is
  syntactically correct, choose the generic "columns" box below the
  the source of the region without analysis.
  "ORA-00903: invalid table name +".
  What makes sence, but now I'm a little stuck.
  
  Does anyone have ideas for a workaround?
  
  Thanks in advance.
  -N.S.N.O.
  

  The example I gave you is quite simple. You must take some time to study it to see where you need to be very careful what put you where. Now, of course your example does not work becaues you have several errors. It will work for you:

  DECLARE
     x   VARCHAR2 (4000);
  BEGIN
     x := x || 'SELECT CON_ID FROM ';
     x := x || :p23_db_name;
     x := x || ' WHERE CON_LEGACY_ID = ' || :p23_conleg_no;
     RETURN (x);
  END;
  

  Denes Kubicek
  -------------------------------------------------------------------
  http://deneskubicek.blogspot.com/
  http://www.Opal-consulting.de/training
  http://Apex.Oracle.com/pls/OTN/f?p=31517:1
  -------------------------------------------------------------------

• 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

• Variable adjustment of linking VO using the session variable

  Hello
  I need get/set variable binding VO using the class ApplicationModuleImple or ViewObjectImple. Does anyone know how to do?
  
  I have a VO based on the query like "select name from users where password =: password". " I had a variable binding him also. now I want to put it to a session scope variable. I can do using ADFContext.getCurrent () .getSession ().get('username');? but somehow, I am not able to obtain the knowledge that is to say where to put the variable binding. Help, please.

  User, please tell us your version of jdve!

  You write a public method in your VO, who has the number of parameters you need (username and password), set the variables in this method binding by using the bind variable setters, expose the method in the interface of the client of the vo. So you see the method in the control of data when you open the VO drag. the method on a page and drop it to count. Then you have the input fields to bind variables and the Send button to execute the method in the VO.

  Timo