Get the bind variables name string SQL or the cursor

Hello

Is there way to get of the bind variables name string SQL or the cursor?

Example of
DECLARE
  l_sql VARCHAR2(2000);
  desctab DBMS_SQL.DESC_TAB;
  curid   PLS_INTEGER;
BEGIN

  l_sql := 'SELECT * FROM emp WHERE mgr = :X and deptno = :Y';

  curid := dbms_sql.open_cursor;
  dbms_sql.parse(curid, l_sql, dbms_sql.NATIVE);
  ....
END;
What I mean with the SQL string:
I love to get using some functions from above code variable l_sql all the bind variable.
In this case the function should return array where is for example: X and: Y

Back to bind the cursor variable names, I mean same but rather string I pass number of cursor.

Y at - it sucks ready function or some may share a code customized for this purpose?

Thanks

Kind regards
Jari

http://dbswh.webhop.NET/dbswh/f?p=blog:Home:0Regards,

Published by: jarola December 19, 2011 02:44

I found there are wwv_flow_utilities.get_binds of the function not documented in APEX packages that do what I want.
Usage example
set serveroutput on
DECLARE
  binds DBMS_SQL.varchar2_table;
BEGIN
  binds := wwv_flow_utilities.get_binds('select :P1_TEST from dual');
  FOR i IN 1 .. binds.count
  LOOP
    dbms_output.put_line(binds(i));
  END LOOP;
END;
/

anonymous block completed
:P1_TEST
But I would not use these functions without papers as those who can change or there is no future versions APEX.
Is there a documented function or the custom function that do the same thing as wwv_flow_utilities.get_binds?

Some old basic example code of my friends. Also the media getting the bind variable of PL/SQL code blocks anon.

SQL> create or replace function GetBindVariables( statement varchar2 ) return TStrings is
  2          --// bind variables names are terminated by one the following special chars
  3          SPECIAL_CHAR    constant TStrings := TStrings(' ',')','+','-','>','<','*',',','=',';',CHR(10),CHR(13));
  4
  5          --// max size of a bind var name
  6          MAX_VARSIZE     constant integer := 100;
  7
  8          pos     integer;
  9          pos1    integer;
 10          occur   integer;
 11          varName varchar2(100);
 12          varList TStrings;
 13  begin
 14          varList := new TStrings();
 15
 16          --// looking for the 1st occurance of a bind variable
 17          occur := 1;
 18
 19          loop
 20                  pos := InStr( statement, ':', 1, occur );
 21                  exit when pos = 0;
 22
 23                  varName := SubStr( statement, pos, 100 );
 24
 25                  --// find the terminating char trailing the
 26                  --// bind variable name
 27                  pos1 := Length( varName );
 28                  for i in 1..SPECIAL_CHAR.Count
 29                  loop
 30                          pos := InStr( varName, SPECIAL_CHAR(i) ) - 1;
 31                          if (pos > 0) and (pos < pos1) then
 32                                  pos1 := pos;
 33                          end if;
 34                  end loop;
 35
 36                  --// extract the actual bind var name (without
 37                  --// colon char prefix)
 38                  varName := SubStr( varName, 2, pos1-1 );
 39
 40                  --// maintain a unique list of var names
 41                  if not varName member of varList then
 42                          varList.Extend(1);
 43                          varList( varList.Count ) := varName;
 44                  end if;
 45
 46                  --// look for the next occurance
 47                  occur := occur + 1;
 48          end loop;
 49
 50          return( varList );
 51  end;
 52  /

Function created.

SQL>
SQL> select
  2          column_value as BIND_VAR
  3  from TABLE(
  4          GetBindVariables('select * from foo where col=:BIND1 and day = to_date(:B2,''yyyy/mm/dd'')')
  5  );

BIND_VAR
------------------------------
BIND1
B2

SQL>

PS. just realize this code is case-sensitive, while variable bind is not. Should throw a upper() or lower() by adding the name of the var to the list - never really a problem for me because I'm pretty tense when it use cases correctly in the code. ;-)

Published by: Billy Verreynne, December 19, 2011 06:19

Tags: Database

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