I am trying to search for a particular value within an Oracle database and the script is not working. Can this be done with the following code?
DECLARE
match_count integer;
v_search_string varchar2(4000) := 'QS/Operation';
BEGIN
FOR t IN (SELECT owner,
table_name,
column_name
FROM all_tab_columns
WHERE data_type in ('VARCHAR2') )
LOOP
BEGIN
EXECUTE IMMEDIATE
'SELECT COUNT(*) FROM '||t.owner || '.' || t.table_name||
' WHERE '||t.column_name||' = :1'
INTO match_count
USING v_search_string;
IF match_count > 0 THEN
dbms_output.put_line( t.owner || '.' || t.table_name ||' '||t.column_name||' '||match_count );
END IF;
EXCEPTION
WHEN others THEN
dbms_output.put_line( 'Error encountered trying to read ' ||
t.column_name || ' from ' ||
t.owner || '.' || t.table_name );
END;
END LOOP;
END;
The script is generating errors. I need to know how to get past the errors and find the value in the tables.
First, catching when others without re-raising is usually a bug; here it looks like you're intending to report errors but carry on, which doesn't seem unreasonable. But you should include the error in the information you display, e.g.:
EXCEPTION
WHEN others THEN
dbms_output.put_line( 'Error encountered trying to read ' ||
t.column_name || ' from ' ||
t.owner || '.' || t.table_name );
dbms_output.put_line(SQLERRM);
END;
Presumably that is telling that tables don't exist, or you have invalid identifiers, or you have privilege errors. You're searching all tables owned by everyone, and not even excluding those owned by SYS as the original code did - hopefully that isn't because you create your own tables under SYS - and it's possible somewhere in there you have tables with quoted identifiers. Actually, it's very likely; SYS has _default_auditing_options_, and system-generated nested table names can be mixed case, for instance.
To be on the safe side adding quotes won't hurt anyway:
BEGIN
EXECUTE IMMEDIATE
'SELECT COUNT(*) FROM "' || t.owner || '"."' || t.table_name || '"' ||
' WHERE "' || t.column_name || '" = :1'
INTO match_count
USING v_search_string;
Related
I want to delete rows with an "Execute immediate" because the table name is in a variable.
How can I count the number of lines deleted?
I tried this, but it does not work with the INTO v_LINE_REMOVE;
v_sql := '
DELETE /*+parallel(t,4)*/
FROM "' || v_owner || '"."' || v_table_name ||'" t
where t."'|| v_column_name ||'" in (
select /*+parallel(rem,4)*/
rem.' || v_type_data || '
from ' || v_table_listeremove || ' rem
WHERE rem.dt_vact = '''|| v_dt_vact ||'''
)
';EXECUTE IMMEDIATE v_sql;--INTO v_LINE_REMOVE;
Thanks a lot
You should be able to use SQL%ROWCOUNT after running your DML statement
EXECUTE IMMEDIATE v_sql;
v_line_remove := SQL%ROWCOUNT;
I am using Oracle 11g. My tables include columns like name and l_name (lowercase of name column). I am trying to iterate through all the columns in my table space to set the l_ columns to lowercase of their respective uppercase columns. Here is what I tried:
for i in (select table_name from user_tables) loop
SELECT SUBSTR(column_name,3) bulk collect into my_temp_storage FROM user_tab_columns WHERE table_name = i.table_name and column_name like 'L\_%' escape '\';
for j in (select column_name from user_tab_columns where table_name = i.table_name) loop
for k in 1..my_temp_storage.count
loop
if(j.column_name like 'L\_%' escape '\' and SUBSTR(j.column_name,3) = my_temp_storage(k)) then
DBMS_OUTPUT.PUT_LINE( 'update ' || i.table_name || ' set ' || j.column_name || ' = LOWER(' ||my_temp_storage(k)|| ') where ' || j.column_name || ' is not null');
execute immediate 'update ' || i.table_name || ' set ' || j.column_name || ' = LOWER(' ||my_temp_storage(k)|| ') where ' || j.column_name || ' is not null';
end if;
end loop;
end loop;
end loop;
I am storing all the names of columns in uppercase in my_temp_storage and updating the table with the LOWER value of the columns in my_temp_storage. This gave me an error saying:
Error report -
ORA-00900: invalid SQL statement
ORA-06512: at line 8
00900. 00000 - "invalid SQL statement"
*Cause:
*Action:
But the DBMS output seemed to be fine:
`update EMPLOYEE set L_NAME = LOWER(NAME) where L_NAME is not null`
Could you help me with the way I did or any other way it can be done?
The program could certainly be simplified:
begin
for i in (select table_name, column_name from user_tab_columns
where column_name like 'L\_%' escape '\')
loop
l_sql := 'update ' || i.table_name || ' set ' || i.column_name
|| ' = LOWER(' ||substr(i.columm_name,3)
|| ') where ' || i.column_name || ' is not null';
execute immediate l_sql;
end loop;
end;
It seems an odd database design though. Have you considered virtual columns, and/or function-based indexes, instead of manually maintained columns?
is it possible to continue after an exception is raised.
I generated a little example of code which is similar to what I would like to perform. I can only get null values from the first query, the other querys always get me something back.
Case Username = InUser Then
Execute Immediate
'select Username from Users where Fullname = ' || '''' || InUser || '''' into Varuser;
<< go_on >>
Execute Immediate
'select Orderno from orders where requester = ' || '''' || VarUser || '''' into VarOrderno
-- other stuff and cases will happen here.
End Case;
EXCEPTION WHEN NO_DATA_FOUND THEN
VarUser := InUser;
Goto go_on;
I know, that if the first dynamic sql doesn't deliver anything, then I use the InUser.
Is there something possible?
Wrap the dynamic select with begin/end and handle the exception there:
Case Username = InUser Then
begin
Execute Immediate
'select Username from Users where Fullname = ' || '''' || InUser || '''' into Varuser;
EXCEPTION WHEN NO_DATA_FOUND THEN
VarUser := InUser;
end;
Execute Immediate
'select Orderno from orders where requester = ' || '''' || VarUser || '''' into VarOrderno
End Case;
I have below query which gives an error as encounter an symbol ( in the line where loop is used. I am trying to develop a function which takes dynamic paramater as table_name,column_name,table_id and used for other tables as well.
FUNCTION get_encryp_pass( table_name IN varchar2,column_name IN varchar2,table_id IN varchar2) RETURN VARCHAR2
IS
BEGIN
EXECUTE IMMEDIATE 'for c1 in (select * from' || table_name ||) loop
EXECUTE IMMEDIATE 'update ' || table_name || ' set ' || column_name = encrypt_val(c1.column_name) || ' where ' || table_id || ' = ' || c1.table_id and column_name is not null;
end loop;
END get_encrypt_pass;
this should work:
CREATE PROCEDURE get_encryp_pass(table_name IN varchar2,
column_name IN varchar2,
table_id IN varchar2) IS
BEGIN
EXECUTE IMMEDIATE 'begin for c1 in (select * from ' || table_name ||
') loop update ' || table_name || ' set ' ||
column_name || ' = encrypt_val(c1.' || column_name ||
') where ' || table_id || ' = c1.'||table_id||' and ' || column_name ||
' is not null; end loop; end;'
;
END;
But why not simply call update FTP_SFTP_SERVER set PASSWORD=encrypt_val(PASSWORD) where PASSWORD is not null ?
keep care of what is a variable and what is a string-literal and must be single-quoted therefore ... and string-variables mus be double-quoted:
EXECUTE IMMEDIATE 'update ' || table_name || ' set ' || column_name || ' = ''' || encrypt_val(c1.column_name) || ''' where ' || table_id || ' = ' || c1.table_id || ' and column_name is not null';
Best practice is to concatenate the statement in a varchar2-variable first and inspect this. If the content of the variable is syntactical correct and executable, the EXECUTE IMMEDIATE should work as well
declare
stmt varchar2(4000);
begin
stmt := 'update ' || table_name || ' set ' || column_name || ' = ''' || encrypt_val(c1.column_name) || ''' where ' || table_id || ' = ' || c1.table_id || ' and column_name is not null';
EXECUTE IMMEDIATE stmt;
end;
I think i have one alternative for your question. MERGE can be used in this case. Please try it i dont have workspaceso dint test it but it should work Let me know if it helps.
FUNCTION get_encryp_pass(
table_name IN VARCHAR2,
column_name IN VARCHAR2,
table_id IN VARCHAR2)
RETURN VARCHAR2
IS
BEGIN
EXECUTE IMMEDIATE 'MERGE INTO '||table_name||' t1 USING
(
SELECT * FROM '||table_name|| ')t2
ON
(
t1.table_id = t2.table_id
)
WHEN MATCHED THEN
UPDATE SET t1.'||column_name||' = encrypt_val(t2.'||column_name||')'
||' WHERE and t1.'||column_name||' IS NOT NULL';
END;
I have the procedure block:
begin
for i in (select grantee
,table_name
,privilege
from user_tab_privs_made
where grantee='TEST')
loop
revoke i.privilege on i.table_name from i.grantee;
end loop;
end;
and the error occurs:
You need to issue the revoke as EXECUTE IMMEDIATE, building a dynamic string with the command you want to be executed:
execute immediate 'revoke ' || i.privilege || ' on ' || i.table_name
|| ' from ' || i.grantee;