Is it possible to execute a ALTER INDEX prepared by doing a SELECT on sys tables in Oracle 12c. Please see below
I am trying to find the unused indexes for which I have prepared the alter statements by select clause below -
SELECT 'alter index ' || owner || '.' || index_name || ' monitoring usage;'
FROM dba_indexes
WHERE owner NOT in (
'SYSTEM',
'SYS');
Next, I will have to manually copy the output of this SQL to a new SQL commander tab and execute them. Rather is it possible to execute these statements directly instead of showing them?
I am trying to achieve this in SQL only, as a single statement executable from any SQL utility like DBViz or SQL+, and NOT IN PL/SQL or Unix.
You can do this two ways:
1- Spoofing the result to a file and running the file.
set pages 0 lines 200 feed off term off
spool _file
SELECT 'alter index ' || owner || '.' || index_name || ' monitoring usage;'
FROM dba_indexes
WHERE owner NOT in ('SYSTEM','SYS');
spool off
#_file
1- Or via PL/SQL
BEGIN
FOR rec in (select owner, index_name FROM dba_indexes WHERE owner NOT in ('SYSTEM','SYS'))
LOOP
query := 'alter index ' || rec.owner || '.' || rec.index_name || ' monitoring usage'
execute immediate query;
END LOOP;
end;
/
SELECT * FROM(SELECT 'alter index ' || owner || '.' || index_name || ' monitoring usage;'
FROM dba_indexes
WHERE owner NOT in (
'SYSTEM',
'SYS');)
Related
I have a database for an application and several environment (development, test and production). I would like to use the option Database copy from SQL Developer in order to retrieve data from the production and copy them in development. Thus data on both environments will be the same.
With a previous version of the program all was working perfectly. Nevertheless with a new version (SQL Developer 18.2) imposed by our company, I obtain several error with different objects like sequences, existing table, primary key, ...) during the copy.
Thus I would like to use a script for cleaning the objects of the Database before to use the tool in order to see if the problem will be solved. But I don't know how to do that.
I found and updated this script:
BEGIN
FOR cur_rec IN (SELECT object_name, object_type
FROM user_objects
WHERE object_type IN
('TABLE',
'VIEW',
'PACKAGE',
'PROCEDURE',
'FUNCTION',
'SEQUENCE',
'SYNONYM'
))
LOOP
BEGIN
IF cur_rec.object_type = 'TABLE'
THEN
EXECUTE IMMEDIATE 'DROP '
|| cur_rec.object_type
|| ' "'
|| cur_rec.object_name
|| '" CASCADE CONSTRAINTS';
ELSE
EXECUTE IMMEDIATE 'DROP '
|| cur_rec.object_type
|| ' "'
|| cur_rec.object_name
|| '"';
END IF;
EXCEPTION
WHEN OTHERS
THEN
DBMS_OUTPUT.put_line ( 'FAILED: DROP '
|| cur_rec.object_type
|| ' "'
|| cur_rec.object_name
|| '"'
);
END;
END LOOP;
END;
Nevertheless this script Cleanup the Schema by DROPPING all objects. I would like to keep the structure and the objects but just empty the conten.
Could you please help me how to do for cleaning the different object without deleting them and importing again?
Thank in advance for your help.
Sebastien
What I'm trying to do is create views based off a condition between two tables, and I want it to go through all tables that meet this condition.
I've been doing some research and I found that cursors would be helpful for this sort of thing, but I've been running into a "cursor out of scope" at line 15.
DECLARE
query_str VARCHAR2(32000);
CURSOR all_syn IS
SELECT SYNONYM_NAME, TABLE_NAME
FROM ALL_SYNONYMS
WHERE SYNONYM_NAME LIKE 'S!_AG!_%' ESCAPE '!';
CURSOR our_tables IS
SELECT TABLE_NAME
FROM ALL_TABLES
WHERE TABLE_NAME LIKE 'AG!_%1' ESCAPE '!';
BEGIN
query_str := 'CREATE OR REPLACE VIEW ' || LTRIM(all_syn.SYNONYM_NAME, 'S_') || 'AS
SELECT TO_CHAR(itemnum) itemnum,
TO_CHAR(keywordnum) keywordnum,
TO_CHAR(keysetnum) keysetnum,
MOD_BY_EMPLOYEE,
MOD_BY_PROCESS,
MOD_DATE_EMPLOYEE,
MOD_DATE_PROCESS
FROM all_syn.SYNONYM_NAME,
our_tables.TABLE_NAME
WHERE our_tables.TABLE_NAME = ' || LTRIM(all_syn.SYNONYM_NAME, 'S_');
FOR v_rec IN all_syn LOOP
IF (v_rec.TABLE_NAME LIKE 'KEYXITEM%') THEN
EXECUTE IMMEDIATE query_str;
END IF;
END LOOP;
END;
The reason I am doing this is because my company has tables that aren't directly connected to a certain 3rd party DB link, so they had me change the table names by putting a 1 at the end of the affected tables, creating synonyms for these tables with the DB link, and then make views of these synonyms with the original table name so that they now have the DB link and act as the original table so that we don't have to change any code. I have to join the synonym tables with the changed tables, because we added some attributes that the 3rd party tables don't have.
If anyone has any suggestions or advice, it would be greatly appreciated! I'm new to using dynamic sql and PL/SQL, so bear with me please.
EDIT:
So I've improved my code, and I feel like I'm getting closer to my desired results, however I'm getting this weird error:
line 28, column 52:
PLS-00357: Table,View Or Sequence reference 'ALL_TABLES.TABLE_NAME' not allowed in this context
Which doesn't make sense to me as I'm declaring it in the query.
BEGIN
FOR v_rec IN all_syn LOOP
IF (v_rec.TABLE_NAME LIKE 'KEYXITEM%') THEN
query_str := 'CREATE OR REPLACE VIEW ' || LTRIM(v_rec.SYNONYM_NAME, 'S_') || ' AS
SELECT itemnum AS item_num,
keywordnum AS key_word_num,
keysetnum AS key_set_num,
MOD_BY_EMPLOYEE,
MOD_BY_PROCESS,
MOD_DATE_EMPLOYEE,
MOD_DATE_PROCESS,
FROM ( SELECT TABLE_NAME
FROM ALL_TABLES
WHERE TABLE_NAME LIKE ' || '''AG!_%1''' || ' ESCAPE ' || '''!''' || '
AND ' || RTRIM(ALL_TABLES.TABLE_NAME, '1') ||' = ' || LTRIM(v_rec.SYNONYM_NAME, 'S_') || ') our_tables,
' || v_rec.SYNONYM_NAME;
-- EXECUTE IMMEDIATE query_str;
END IF;
dbms_output.put_line(query_str);
END LOOP;
END;
You cannot reference cursor like that. Move the query_str creation inside the FOR LOOP and reference the record variable.
EDIT: I've tried to fix the FROM/WHERE clause, but you might be missing a join condition there.
DECLARE
query_str VARCHAR2(32000);
CURSOR all_syn IS
SELECT SYNONYM_NAME, TABLE_NAME
FROM ALL_SYNONYMS
WHERE SYNONYM_NAME LIKE 'S!_AG!_%' ESCAPE '!';
CURSOR our_tables IS
SELECT TABLE_NAME
FROM ALL_TABLES
WHERE TABLE_NAME LIKE 'AG!_%1' ESCAPE '!';
BEGIN
FOR v_rec IN all_syn LOOP
IF (v_rec.TABLE_NAME LIKE 'KEYXITEM%') THEN
query_str := 'CREATE OR REPLACE VIEW ' || LTRIM(v_rec.SYNONYM_NAME, 'S_') || 'AS
SELECT TO_CHAR(itemnum) itemnum,
TO_CHAR(keywordnum) keywordnum,
TO_CHAR(keysetnum) keysetnum,
MOD_BY_EMPLOYEE,
MOD_BY_PROCESS,
MOD_DATE_EMPLOYEE,
MOD_DATE_PROCESS
FROM ' || v_rec.SYNONYM_NAME || ',
' || v_rec.TABLE_NAME || '
WHERE ' || v_rec.TABLE_NAME = ' || LTRIM(v_rec.SYNONYM_NAME, 'S_');
EXECUTE IMMEDIATE query_str;
END IF;
END LOOP;
END;
In Oracle PL/SQL, I have run a query and am trying to read through each column for each row one by one so I can concatenate them together with a delimiter (hard format requirement). The script is used on multiple tables of varying sizes, so the number of columns is not known in advance. I used
SELECT COUNT(column_name) INTO NumColumns FROM all_tabs_cols
WHERE table_name = Table_Array(i);
where Table_Array has already been defined. This is in the middle of a for loop and has successfully gotten me a total number of columns. Table_Cursor is a SELECT * statement. After this I am trying to do something like
FOR j IN 0..NumColumns-1 LOOP
FETCH TABLE_CURSOR.column(j) INTO DataValue;
DBMS_OUTPUT.PUT(DataValue || '/');
END LOOP
The above is pseudo code. It illustrates the concept I am after. I do not know PL/SQL well enough to know how to get a value like this out of a row. I am also worried about accidentally advancing the cursor while doing this. How can I accomplish this task?
You must use some form of dynamic SQL. Here is a quick example:
It builds the SQL statement that will select the '/' separated columns from the table you want. Then it uses dynamic SQL to run that SQL statement.
DECLARE
p_table_name VARCHAR2(30) := 'DBA_OBJECTS';
l_sql VARCHAR2(32000);
TYPE varchar2tab IS TABLE OF VARCHAR2(32000);
l_array varchar2tab;
BEGIN
SELECT 'SELECT ' || listagg(column_name,' ||''/''||') within group ( order by column_id ) || ' FROM ' || owner || '.' || table_name || ' WHERE ROWNUM <= 100'
INTO l_sql
FROM dba_tab_columns
where table_Name = 'DBA_OBJECTS'
group by owner, table_Name;
EXECUTE IMMEDIATE l_sql BULK COLLECT INTO l_array;
FOR i in l_array.first .. l_array.last LOOP
dbms_output.put_line(l_array(i));
END LOOP;
END;
This is how your code should look:
SELECT F1 || ', ' || F2 || ', ' || ... || ', ' || FN
FROM TABLE
NO LOOPS
Here is how you can generate code that does not use loops.
Note, if you want you can take out the where statement and generate the code for the whole database.
Test with just one table first.
SELECT 'SELECT '|| LISTAGG(COLUMN_NAME, ' || '', '' || ') || ' FROM '||TABLE_NAME as sql_stm
FROM ALL_TAB_COLUMNS
WHERE TABLE_NAME='tablename'
GROUP BY TABLE_NAME;
I executed the script below and it works:
BEGIN
FOR cur_rec IN (SELECT object_name, object_type
FROM user_objects
WHERE object_type IN
('TABLE',
'VIEW',
'PACKAGE',
'PROCEDURE',
'FUNCTION',
'SEQUENCE'
))
LOOP
BEGIN
IF cur_rec.object_type = 'TABLE'
THEN
EXECUTE IMMEDIATE 'DROP '
|| cur_rec.object_type
|| ' "'
|| cur_rec.object_name
|| '" CASCADE CONSTRAINTS';
ELSE
EXECUTE IMMEDIATE 'DROP '
|| cur_rec.object_type
|| ' "'
|| cur_rec.object_name
|| '"';
END IF;
EXCEPTION
WHEN OTHERS
THEN
DBMS_OUTPUT.put_line ( 'FAILED: DROP '
|| cur_rec.object_type
|| ' "'
|| cur_rec.object_name
|| '"'
);
END;
END LOOP;
END;
/
But the problem is, after this, I cant grant, create or drop etc. in my database even I'm using a sysdba user.
I am getting the error:
ORA-00604: error occurred at recursive SQL level 1
ORA-00942: table or view does not exist
Please help. Thanks.
One possible cause for the recursive SQL error is triggers. You might have run into this scenario:
you have a trigger that fires for every DDL statement
this trigger tries to insert records into some kind of audit/log table
you audit/log table was dropped by your cleanup script
To get a list of all triggers, you can use
select * from dba_triggers
where trigger_type not in ('BEFORE EACH ROW','AFTER EACH ROW')
(you can exclude row-level triggers because they conceptually belong to the table and would have been automatically dropped when you dropped the table). After you've identified the offending trigger, you can either disable or drop it.
So, I'm trying to create a script that will generate SQL codes for copying tables from HR schema into my own schema.
What I got so far is this but it's incorrect... will anyone help me or give me hints?
select 'create table ' || USER_TABLES || '_copy as select * from ' || USER_TABLES || ';'from hr_tables;
Please help me I'm new at this and so desperate.
Try this:
SELECT 'CREATE TABLE ' ||table_name || '_copy AS SELECT * FROM ' || table_name || ';'
FROM all_tables
WHERE OWNER = 'HR';