Using Oracle SQL Developer. I have the following sample working:
DECLARE
v_next_TransId INTEGER; -- declare
BEGIN
select (max(Transaction_ID)+1) into v_next_TransId from xxpos.pos_transactions;
dbms_output.Put_line(v_next_TransId); --display
END;
Now I want to use that variable in an insert and/or select, I tried with and without a : prefix. The sample below gives me the ORA-01008: not all variables found.
DECLARE
v_next_TransId INTEGER; -- declare
BEGIN
select (max(Transaction_ID)+1) into v_next_TransId from xxpos.pos_transactions;
dbms_output.Put_line(v_next_TransId); --display
-- insert new row will go here
-- commit will go here
-- now verify the insert worked okay
--select * from xxpos.pos_transactions where Transaction_ID = ( select max(Transaction_ID) from xxpos.pos_transactions )
select * from xxpos.pos_transactions where Transaction_ID = :v_next_TransId;
END;
Without the : in front of the variable, I get this syntax error:
Versions:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
PL/SQL Release 11.2.0.4.0 - Production
In PLSQL code block, columns of select statement have to be assigned to variables. You have to use select into clause your plsql code block as shown below.
DECLARE
v_next_TransId INTEGER; -- declare
l_pos_transactions xxpos.pos_transactions%ROWTYPE;
BEGIN
select (max(Transaction_ID)+1) into v_next_TransId from xxpos.pos_transactions;
dbms_output.Put_line(v_next_TransId); --display
-- insert new row will go here
-- commit will go here
-- now verify the insert worked okay
--select * from xxpos.pos_transactions where Transaction_ID = ( select max(Transaction_ID) from xxpos.pos_transactions )
select * into l_pos_transactions
from xxpos.pos_transactions where Transaction_ID = :v_next_TransId;
DBMS_OUTPUT.PUT_LINE(l_pos_transactions.column1|| ',' || l_pos_transactions.column2);
END;
Related
This is a question about Oracle PL/SQL.
I have a procedure in which the exact WHERE clause is not known until the run time:
DECLARE
CURSOR my_cursor is
SELECT ...
FROM ...
WHERE terms in (
(SELECT future_term2 FROM term_table), -- whether this element should be included is conditional
(SELECT future_term1 FROM term_table),
(SELECT present_term FROM term_table)
);
BEGIN
(the processing)
END;
/
What the (SELECT ... FROM term_table) query returns is a 4-character string.
For a solution to this, I am thinking of using a parameterized cursor:
DECLARE
target_terms SOME_DATATYPE;
CURSOR my_cursor (pi_terms IN SOME_DATATYPE) IS
SELECT ...
FROM ...
WHERE terms in my_cursor.pi_terms;
BEGIN
target_terms := CASE term_digit
WHEN '2' THEN (
(SELECT future_term2 FROM term_table),
(SELECT future_term1 FROM term_table),
(SELECT present_term FROM term_table)
) ELSE (
(SELECT future_term1 FROM term_table),
(SELECT present_term FROM term_table)
)
END;
FOR my_record IN my_cursor (target_terms) LOOP
(the processing)
END LOOP;
END;
/
The problem is what the datatype for SOME_DATATYPE should be is not known to me, nor is it known whether Oracle supports such a cursor parameter at all. If supported, is the way shown above to fabricate the value for target_terms correct? If not, how?
Hope someone who know can advise. And thanks a lot for the help.
You can certainly pass a parameter to a cursor, just like you can to a function - but only IN parameters. However, PL/SQL is a strongly typed language, so the datatype must be specified at the time of compilation.
It looks to me like what you will need to do is construct the query dynamically and then use
OPEN cursor FOR l_query;
where l_query is the constructed string. This should give you a feel for what you can do:
CREATE OR REPLACE PACKAGE return_id_sal
AUTHID DEFINER
IS
TYPE employee_rt IS RECORD
(
employee_id employees.employee_id%TYPE,
salary employees.salary%TYPE
);
FUNCTION allrows_by (append_to_from_in IN VARCHAR2 DEFAULT NULL)
RETURN SYS_REFCURSOR;
END return_id_sal;
/
CREATE OR REPLACE PACKAGE BODY return_id_sal
IS
FUNCTION allrows_by (append_to_from_in IN VARCHAR2 DEFAULT NULL)
RETURN SYS_REFCURSOR
IS
l_return SYS_REFCURSOR;
BEGIN
OPEN l_return FOR
'SELECT employee_id, salary FROM employees ' || append_to_from_in;
RETURN l_return;
END allrows_by;
END return_id_sal;
/
DECLARE
l_cursor SYS_REFCURSOR;
l_row return_id_sal.employee_rt;
BEGIN
l_cursor := return_id_sal.allrows_by ('WHERE department_id = 10');
LOOP
FETCH l_cursor INTO l_row;
EXIT WHEN l_cursor%NOTFOUND;
END LOOP;
END;
/
You will need to take precautions against SQL injection with this sort of code. Certainly a user should never be able to pass SQL text directly to such a function!
You can use also some built-in VARRAY SQL types like SYS.ODCIVARCHAR2LIST or create your own :
CREATE OR REPLACE NONEDITIONABLE TYPE VARCHARLIST
AS VARRAY(32767) OF VARCHAR2(4000);
Then you can use it with SELECT COLUMN_VALUE FROM TABLE(COLLECTION) statement in your cursor:
DECLARE
l_terms SYS.ODCIVARCHAR2LIS; --or VARCHARLIST
CURSOR my_cursor (p_terms IN SYS.ODCIVARCHAR2LIS) IS
SELECT your_column
FROM your_table
WHERE terms in (select COLUMN_VALUE from table (p_terms));
BEGIN
select term
bulk collect into l_terms
from (
select 'term1' term from dual
union all
select 'term2' term from dual
);
FOR my_record IN my_cursor (l_terms) LOOP
--process data from your cursor...
END LOOP;
END;
I am trying to create database by my java application using my generated schema file. In schema I have included drop query also. But I want to do some improvements for DROP QUERY. So I want to check the existence of db objects before running drop query and drop only when if it exists.
I googled for it and found some oracle link, Some link suggest following syntax and some mentioned that ORACLE does not support such syntax.
SYNTAX A:
IF EXISTS DROP TABLE TABLE_NAME
SYNTAX B:
DROP [TEMPORARY] TABLE [IF EXISTS]
tbl_name [, tbl_name] ...
[RESTRICT | CASCADE]
I also tried following queries:-
IF EXISTS (SELECT * FROM dba_objects WHERE OBJECT_NAME = 'BBB' )
DROP TABLE [BBB]
but it was giving error:-
Error starting at line 2 in command:
DROP TABLE [BBB]
Go
Error report:
SQL Error: ORA-00903: invalid table name
00903. 00000 - "invalid table name"
*Cause:
*Action:
Error starting at line 1 in command:
IF EXISTS (SELECT * FROM dba_objects WHERE OBJECT_NAME = 'BBB' ) DROP TABLE [BBB]
Error report:
Unknown Command
I refered following links:-
https://community.oracle.com/thread/2421779?tstart=0
Please suggest me if there any other queries to drop table with condition if table exists.
Drop table with no check. If any error exists you'll never know when something went wrong.
BEGIN
EXECUTE IMMEDIATE 'DROP TABLE my_table';
EXCEPTION
WHEN OTHERS THEN
NULL;
END;
Or you can search in Oracle dictionary.
DECLARE
l_cnt NUMBER;
BEGIN
SELECT count(*)
INTO l_cnt
FROM user_tables
WHERE table_name = 'MY_TABLE';
IF l_cnt = 1 THEN
EXECUTE IMMEDIATE 'DROP TABLE my_table';
END IF;
END;
If you run following code you do not have to check if table exists and in case of errors (table is locked with now wait or any other you will know about it)
begin
for c1 in (select owner,table_name from dba_tables where table_name='MY_TABLE') loop
execute immediate 'drop table '||c1.owner||'.'||c1.table_name||'';
end loop;
end;
Try this : It will drop table 'table_name' if it is present .
declare
a varchar2(700) ;
begin
execute immediate ' SELECT CASE WHEN tab = 1
THEN ''DROP TABLE TABLE_NAME''
ELSE ''select 1 from dual''
END
FROM ( SELECT sum(case when table_name = ''TABLE_NAME'' then 1 else 0 end ) as tab FROM user_tables)' into a;
EXECUTE IMMEDIATE a;
end;
In Oracle DB, I have a large select staetment with lots of joins and cases that is stored in a CLOB field in one of my tables.
How can i execute this statement from the CLOB?
Look into the EXECUTE IMMEDIATE syntax.
Example table:
CREATE TABLE test(id number, largedata clob);
INSERT INTO test VALUES (1, 'select name from v$database');
commit;
select * from test;
DECLARE
l_sql clob;
l_result VARCHAR2(50);
BEGIN
SELECT LARGEDATA INTO l_sql FROM TEST;
EXECUTE IMMEDIATE l_sql INTO l_result;
dbms_output.put_line(l_result);
END;
/
Output is the DB name.
I have written a PL/SQL Procedure which compares data between two tables and print the difference if any, but the twist is the table names to the procedure is dynamic. Here is the procedure
create or replace PROCEDURE compareTables(
tabA IN VARCHAR2, tabB IN VARCHAR2) AS
cur_tab_name USER_TABLES%ROWTYPE;
lv_sql varchar2(4000);
lv_sql2 varchar2(4000);
BEGIN
--SELECT TABLE_NAME INTO cur_tab_name FROM USER_TABLES WHERE TABLE_NAME = tabA;
lv_sql2 := 'SELECT TABLE_NAME FROM USER_TABLES WHERE TABLE_NAME = :b_tabA';
EXECUTE IMMEDIATE lv_sql2 INTO cur_tab_name USING tabA;
<<child>>
DECLARE
TYPE cursor_ref IS REF CURSOR;
cur_comp_result cursor_ref;
rec_comp_result cur_tab_name.TABLE_NAME%rowtype;
BEGIN
lv_sql := 'SELECT * FROM '||tabA||' MINUS SELECT * FROM '||tabB;
OPEN cur_comp_result FOR lv_sql;
LOOP
FETCH cur_comp_result INTO rec_comp_result;
EXIT WHEN cur_comp_result%NOTFOUND;
DBMS_OUTPUT.PUT_LINE(rec_comp_result.empid || '' || rec_comp_result.name);
END LOOP;
CLOSE cur_comp_result;
Exception
When others then
dbms_output.put_line('The Problem is '||sqlerrm);
END;
END compareTables;
Now the problem is when I compile this procedure I am getting the following error
Error at line 14: PLS-00310: with %ROWTYPE attribute, 'CUR_TAB_NAME.TABLE_NAME' must name a table, cursor or cursor-variable
line 14:rec_comp_result cur_tab_name.TABLE_NAME%rowtype;
how will I solve it?
*NB: I don't have oracle installed in my system. I am using Oracle Apex Online tool which uses
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 and
PL/SQL Release 11.2.0.3.0
As a test, go to the last line, and after the semicolon, hit enter.
I know that Pro*C in particular will gag without a line terminator at the end of the file.
You may be encounting that issue.
Outside the scope of your question consider
SELECT columns
FROM TABLE1
MINUS
SELECT columns
FROM TABLE2
and
SELECT columns
FROM TABLE2
MINUS
SELECT columns
FROM TABLE1
Use: cur_tab_name.table_name. The variable CUR_TAB_NAMEis of type USER_TABLE%ROWTYPE, thus it has several fields.
I am a beginner in Oracle. I created the table type as like as follows:
TYPE metertable IS TABLE OF pseb.metermaster.meterid%type;
I dnt know how to insert the value into that table type. I need to store the whole resultset of the following query into the table type.
select distinct(meterid)
from pseb.consumerfeedermetermapper
where feederid in (select distinct (fm.FeederID)
from pseb.feedermaster fm,pseb.consumerfeedermetermapper cfm
where fm.substationid=v_v_type
and cfm.feederid=fm.feederid
and cfm.FeederID>0)
and meterid >0
order by meterid;
Help me to do that.
Use BULK COLLECT to select the data into a variable of that type:
declare
mt metertable;
begin
select distinct(meterid)
bulk collect into mt
from pseb.consumerfeedermetermapper
where feederid in (select distinct (fm.FeederID)
from pseb.feedermaster fm,pseb.consumerfeedermetermapper cfm
where fm.substationid=v_v_type
and cfm.feederid=fm.feederid
and cfm.FeederID>0)
and meterid >0
order by meterid;
-- Now use mt...
end;
I had the same issue, and this code help me :
SET SERVEROUTPUT ON
DECLARE
TYPE t_bulk_collect_test_tab IS TABLE OF bulk_collect_test%ROWTYPE;
l_tab t_bulk_collect_test_tab;
l_cursor SYS_REFCURSOR;
BEGIN
-- Way 1
OPEN l_cursor FOR 'SELECT * FROM bulk_collect_test';
FETCH l_cursor
BULK COLLECT INTO l_tab;
CLOSE l_cursor;
DBMS_OUTPUT.put_line('Dynamic FETCH : ' || l_tab.count);
-- Way 2
EXECUTE IMMEDIATE 'SELECT * FROM bulk_collect_test' BULK COLLECT INTO l_tab;
DBMS_OUTPUT.put_line('Dynamic EXECUTE: ' || l_tab.count);
END;
/
http://www.dba-oracle.com/plsql/t_plsql_dynamic.htm
declare
type tab_type is table of consumerfeedermetermapper%rowtype;
tab_t tab_type;
begin
select distinct(meterid) bulk collect into tab_t
from pseb.consumerfeedermetermapper
where feederid in (select distinct (fm.FeederID)
from pseb.feedermaster fm,pseb.consumerfeedermetermapper cfm
where fm.substationid=v_v_type
and cfm.feederid=fm.feederid
and cfm.FeederID>0)
and meterid >0
order by meterid;
end;
You can use the above code