Convert SQL to take advantage of the Bind Variables
Hi all
Is it possible to convert the SQL below so I can enjoy variable Bind? It's just my personal way of followed by the name of the script that I use on a daily basis... the file is passed to a point that its about 2K lines long, and whenever I run this specific file to get a script name, it creates a new SQL in the database pool shared... I tried to change this option to use bind variables , but it doesn't seem to work properly and I wanted what suggestion of the community...
ACCEPT script_name_like prompt 'ENTER SCRIPT NAME OR HIT ENTER TO GET ALL SCRIPT NAME OR PUT PART OF THE SCRIPT NAME : ' WITH help_script AS ( SELECT 'top_seg_tab_obj_ash' AS Script_Name, 'top segment by tot wait time' AS Description, '# of mins to go back' AS INPUT FROM dual UNION ALL SELECT 'v$_tab' AS Script_Name, 'shows list v$ views' AS Description, 'view name like' AS INPUT FROM dual UNION ALL SELECT 'dba_tab' AS Script_Name, 'shows list dba views' AS Description, 'view name like' AS INPUT FROM dual UNION ALL SELECT 'nls_params' AS Script_Name, 'shows list of current NLS setting for DB/INST/SESS' AS Description, 'no Input Needed' AS INPUT ) SELECT upper(script_name) AS "MY SCRIPT NAME", upper(description) AS description, upper(INPUT) AS INPUT FROM help_script WHERE script_name LIKE nvl('%&script_name_like%', script_name) ;
Hello
user13454469 wrote:
Hi all
Is it possible to convert the SQL below so I can enjoy variable Bind? It's just my personal way of followed by the name of the script that I use on a daily basis... the file is passed to a point that its about 2K lines long, and whenever I run this specific file to get a script name, it creates a new SQL in the database pool shared... I tried to change this option to use bind variables , but it doesn't seem to work properly and I wanted what suggestion of the community...
- ACCEPT script_name_like invites ' ENTER NAME or HIT ENTER to GET ALL THE SCRIPT NAME or PART OF THE SCRIPT the SCRIPT NAME: '
- WITH help_script AS
- (SELECT "top_seg_tab_obj_ash" AS Script_Name,
- "upper segment by tot queue time" AS Description,.
- "# of minutes to go back" AS INPUT
- OF the double
- UNION ALL SELECT ' v$ _tab "AS Script_Name,.
- "Show list views$ v ' AS Description,.
- 'show the name as' AS ENTRY
- OF the double
- UNION ALL SELECT 'dba_tab' AS Script_Name,
- "Show list views dba" AS Description,.
- 'show the name as' AS ENTRY
- OF the double
- UNION ALL SELECT 'nls_params' AS Script_Name,
- 'displays the list of current NLS parameter for DB/INST/SESS' AS Description,.
- ("No input is necessary" IN ENTRY)
- SELECT upper (script_name) AS "MY SCRIPT NAME",
- Upper (Description) as a description,
- Upper (Input) AS INPUT
- OF help_script
- WHERE script_name AS nvl (script_name ' % & script_name_like %',);)
The WHERE clause (last line) of is the only place where you are using the proxy & script_name_like? If so:
-ACCEPT command is exactly the same as before
ACCEPT script_name_like invites ' ENTER NAME or HIT ENTER to GET ALL THE SCRIPT NAME or PART OF THE SCRIPT the SCRIPT NAME: '
VARIABLE script_name_like_b VARCHAR2 (30)
EXEC: script_name_like_b: = '% & script_name_like;
WITH the help _script AS
...
WHERE script_name AS NVL (: script_name_like_b, script_name);
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Example of
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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
But I would not use these functions without papers as those who can change or there is no future versions APEX.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
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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
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Which I can't think I can code the amount or value in...
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There are experts out there who can direct me in the right direction?
Very much appreciated.
Published by: Codes on March 5, 2013 17:11
Published by: Codes on March 5, 2013 17:13I have a lot of procedures where I accumulate the number of bind variables.
My approach has been to load each variable binding in an associative array and maintain a counter of the number of bind variables.
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; elsif v_binds = 1 then execute immediate using bind_array(1); elsif v_binds = 2 execute immediate using bind_array(1), bind_array(2); elsif ... end if; Here is a link:
Re: USING Dynamic Clause?Later, I discovered that you could do something like the following:
(Asktom)
http://www.Oracle.com/technetwork/issue-archive/2009/09-Jul/o49asktom-090487.htmlEither of these approaches to solve your problem.
Added link: Keith Jamieson on 6 March 2013 09:26
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