Using Oracle SQL Developer, I develop queries that are copy/pasted as a subquery into a number of other queries. If I make a change, I have to go through all of the files and manually update those queries as well. It's very inefficient.
Is there a way of using sql files like programing modules? That way I only have to make a change in one place?
If you create a stored procedure you can reference that in your queries and make the change in the procedure itself.
Related
With TOAD I know I can view the dependency (uses) graph of a stored procedure using the schema browser. And, the Oracle utility procedure deptree_fill can do something similar. What I want to do is script out all of the stored procedures, functions and table definition DLLs into a file that I can use to recreate those objects in another database. Is there a tool or an existing script for this purpose? My own searching has not found a solution. In my particular case the stored procedure uses a dozen other procedures, a few functions and twenty tables.
Edit 1
Maybe my original question was not clear. What I am looking for is something that will take the stored procedure I am interested in and script it and all of its dependency graph into one or more files.
The schema I am dealing with has hundreds of objects in it and the dependency graph has ~50 objects in it. So I'd rather not dig through large lists in TOAD or write an Oracle script myself if I can avoid it.
All sources can be extracted using the dbms_metadata package.
To get the source of a table:
select dbms_metadata.get_ddl('TABLE', 'SOME_TABLE')
from dual;
To get the source of a stored procedure:
select dbms_metadata.get_ddl('PROCEDURE', 'SOME_PROC')
from dual;
Using that you can create a SQL script that extracts everything and then spool the result to a file.
More details about the various functions in dbms_metadata can be found in the manual:
http://docs.oracle.com/cd/E11882_01/appdev.112/e25788/d_metada.htm#i1015856
Hmm, it is quite easy to find in google.
Get table DDL: How to get Oracle create table statement in SQL*Plus
Code of stored procedures can be found in table USER_SOURCE.
Also, for exporting schema to another DB you can use oracle utilities: http://docs.oracle.com/cd/B28359_01/server.111/b28319/exp_imp.htm#g1070082
In Toad see the Generate Schema Script window. You can get to it from the Database|Export menu. There are many options there to include/exclude what you want.
Hey EXPERIENCED SSIS DEVELOPERS, I need your help.
High-Level Requirements
Query SQL Server table (on a different server than my SSIS server) resulting in about 200-300k records results set.
Use three output colums for each row to lookup date in Oracle database.
Insert or Update SQL Server table with results.
Use SSIS.
SQL Server 2008
Sounds easy, right?
Here is what I have done:
Created on Control Flow Execute SQL Task that gets a recordset from SQL Server. Very fast, easy query, like select field1, field2, field 3 from table where condition > 0. That's it. Takes less than a second.
Created a variable (evaluated as expression) for the Oracle query that uses the results set from the above in the WHERE clause.
Created a ForEachLoop Container that takes the results (from #1 above) for each row in the recordset and runs it through a Data Flow that uses the Oracle query (from #2 above) with Data access mode: SQL command from variable against an Oracle data source. Fast, simple query with only about 6 columns returned.
Data Conversion - obvious reasons - changing 3 columns from Oracle data types to SQL Server data types.
OLE DB Destination to insert to SQL Server using Fast Load to staging table.
It works perfectly! Hooray! Bad news - it is very, very slow. When I say slow, I mean it process 3000 records per hour. Holy moly - so freaking slow.
Question: am I missing a way to speed it up? It seems like the ForEachLoop Container is the bottleneck. Growl.
Important Points:
- I have NO write access in Oracle environment, so don't even suggest a potential solution that requires it. Not a possibility. At all.
Oracle sources do not allow for direct parameter definition. So no SELECT FIELD FROM TABLE WHERE ?. Don't suggest it - doesn't work.
Ideas
- Should I find a way to break down the results of the Execute SQL task and send them through several ForEachLoop Containers for faster processing?
Is there another design that is more appropriate?
Is there a script I can use that is faster?
Would it be faster to create a temporary table in memory and populate it - then use the results to bulk insert to SQL Server? Does this work when using an Oracle data source?
ANY OTHER IDEAS?
Our development team does all of their development on their local machines, databases included. When we make changes to schema's we save the SQL to a file that is then sent to the version control system (If there is a better practice for this I'd be open to hearing about that as well).
When working on SQL Server we'd wrap our updates around "if exists" statements to make them re-runnable. I am not working on an Oracle 10g project and I can't find any oracle functions that do the same thing. I was able to find this thread on dbaforums.org but the answer here seems a bit kludgy.
I am assuming this is for some sort of Automating the Build process and redoing the build from scratch if something fails.
As Shannon pointed out, PL/SQL objects such as Procedures, functions and Packages have the "create or replace" option, so a second recompile/re-run would be ok. Grants should be fine too.
As for Table creations and DDLs, you could take one of the following approaches.
1) Do not add any drop commands to the scripts and ask your development team to come up with the revert-script for the individual modules.
So for each create table that they add to the build, they will have an equivalent "DROP TABLE.." added to a script say."build_rollback.sql". If your build fails , you can run this script before running the build from scratch.
2)The second (and most frequently used approach I have seen) is to include the DROP table just before the create table statement and then Ignore the"Table or view does not exist" errors in the build log. Something like..
DROP TABLE EMP;
CREATE TABLE EMP (
.......
.......
);
The thread you posted has a major flaw. The most important one is that you always create tables incrementally. Eg, your database already has 100 tables and you are adding 5 more as part of this release. The script spools the DROP Create for all 100 tables and then executes it which does not make a lot of sense (unless you are building your database for the first time).
An SQL*Plus script will continue past errors unless otherwise configured to.
So you could have all of your scripts use :
DROP TABLE TABLE_1;
CREATE TABLE TABLE_1 (...
This is an option in PowerDesigner, I know.
Another choice would be to write a PL/SQL script which scrubs a schema, iterating over all existing tables, views, packages, procedures, functions, sequences, and synonyms in the schema, issuing the proper DDL statement to drop them.
I'd consider decomposing the SQL to create the database; one giant script containing everything for the schema sounds murderous to maintain in a shared environment. Dividing at a Schema / Object Type / Name level might be prudent, keeping fully dependent object types (like Tables and Indexes) together.
I am needing to export the tables for a given schema, into DDL scripts and Insert statements - and have it scripted such that, the order of dependencies/constraints is maintained.
I came across this article suggesting how to archive the database with data - http://www.dba-oracle.com/t_archiving_data_in_file_structures.htm - not sure if the article is applicable for oracle 10g/11g.
I have seen "export table with data" features in "Sql Developer", "Toad for Oracle", "DreamCoder for Oracle" etc, but i would need to do this one table at a time, and will still need to figure out the right order of script execution manually.
Are there any tools/scripts that can utilize oracle metadata and generate DDL script with data?
Note that some of the tables have CLOB datatype columns - so the tool/script would need to be able to handle these columns.
P.S. I am needing something similar to the "Generate Scripts" feature in SQL Server 2008, where one can specify "script data" option and get back a self-sufficient script with DDL and data, generated in the order of table constraints. Please see: http://www.kodyaz.com/articles/sql-server-script-data-with-generate-script-wizard.aspx
Thanks for your help!
Firstly, recognise that this isn't necessarily possible. A view can use a function in a package that also selects from the view. Another issue is that you might need to load data into tables and then apply constraints, even though this might be slower than the other way round.
In short, you will need to do some work here.
Work out the dependencies in your system. ALL_DEPENDENCIES is the primary mechanism.
Then use DBMS_METADATA.GET_DDL to extract the DDL statements. For small data volumes, I'd extract the constraints separately for applying after the data load.
In current versions you can create external tables to unload data from regular tables into OS files (and obviously go the other way round). But if you've got exotic datatypes (BLOB, RAW, XMLTYPEs, User Defined Types....) it will be more challenging.
I suggest that you use Oracle standard export and import (exp/imp) here, is there a reason why you won't consider it? Note in addition you can use the "indexfile" option on the import to output the SQL statements (unfortunately this doesn't include the inserts) to a file instead of actually executing them.
I need to create a flat file and push information into it from oracle database using JSP.
I require a sample code. Help will be appreciated.
If you're looking for an easy way to write different SQL statements to a file, use this procedure: http://www.oracle-developer.net/content/utilities/data_dump.sql
Also you might want to look into DBMS_XSLPROCESSOR.CLOB2FILE.
I think you need to look into Oracle external tables. These are flat files that appear as tables in the Oracle database. You would simply insert data into it using SQL (as per any other database table). Google "Oracle External Tables" for more information.