Data Definition Language; defining database structures but not their contents.

learn more… | top users | synonyms

0
votes
1answer
244 views

Migration script fires 'The data definition language (DDL) command cannot be executed at the Subscriber'

Yesterday I had run a migration script, produced by Visual Studio 2008 schema compare option, on a SQL Server 2008 database. It had run correctly. But today, when I executed the same script, it threw ...
1
vote
1answer
211 views

All users are having NO Privileges in phpMyAdmin

By mistake, I changed all the privileges of user 'root' in my MySQL Database. Not even a single privilege is having for that user. Now if I log in with another user I am able to access only one ...
2
votes
4answers
108 views

Copy indexes from one table to another

I have a series of ETL jobs in which I create a swap table using CREATE TABLE table1_swap LIKE table1. In order to make the populating of table1_swap faster I do not include the indexes. When I'm ...
2
votes
2answers
556 views

exporting DDL of all views Oracle

How can I go about exporting DDL of all my schema views in single .sql file ? I've read there is a function DBMS_METADATA.GET_DDL But I can't figure out how to use it for my case. I know how to ...
0
votes
0answers
23 views

Migration DDL - PostgreSQL 9.2

I'm doing a DDL to migrate all the attachments from the DB to a NFS server. Structure: /userfiles/account/5554/attachment/26687981/file/2790000/main.with_name/photo.j‌​pg ...
-2
votes
1answer
44 views

Extract ID String - PostgreSQL 9.2 [closed]

I've got this directory path: /userfiles/account/5554/attachment/26687981/file/2790000/main.with_name/photo.jpg /userfiles/account/(accountid)/(filecontext)/(ownerid)/(variation)/(filename) -- ...
4
votes
4answers
9k views

Query to compare the structure of two tables in MySQL

To automate the backup process of one of my MySQL databases, I would like to compare the structure of two tables (current version vs old version). Can you think of a query that can compare two ...
2
votes
1answer
30 views

Basic transactional DDL script in PostgreSQL

PostgreSQL newbie here trying to put together a transactional DDL script to atomically create a database and its schema in Postgres 9.3: in a transaction, create a few tables; if any errors, roll the ...
7
votes
4answers
920 views

DDL contention on TempDB

I have a SQL Server 2005 Standard x64 that is experiencing issues with TempDB DDL contention for the past few months. The server will experiencing contention on wait resource 2:1:103 (the wait type ...
1
vote
0answers
21 views

MySQL Cluster “ALTER ONLINE TABLE … STORAGE MEMORY” doubt

I have a MySQL Cluster database where the data is both in-memory and written to disk. I'm trying to understand the ALTER ONLINE TABLE ... STORAGE MEMORY statement, so that I can use this technique to ...
6
votes
1answer
632 views

ERWIN create and use database

I'm trying to generate physical database from my logical model using ERWIN 7. All is well in the script that is generated automatically, there is only the problem that the model is created in the ...
11
votes
1answer
4k views

MATCH FULL vs MATCH SIMPLE in foreign key constraints

I've noticed a MATCH SIMPLE or MATCH FULL option in phpPgAdmin, but I can't find a description in the docs. The default is MATCH SIMPLE. How do they function?
3
votes
1answer
152 views

What's the difference between data definition language and data description language?

Are they the same thing? Which one does DDL stand for? Here's what my understanding is, but could potentially be incorrect: Data definition language: Contains names and types and field length etc. of ...
2
votes
1answer
35 views

help in correcting the syntax error of the below create table with as with multiple select

Please help to correct the syntax of the below. I am from a math background trying to use Oracle. The command helps me permute the columns and put them in one table. create table newsample AS ( ...
1
vote
1answer
44 views

Create a function from another function

Is it possible to create a new function from another plpgsql function? Something like this: CREATE OR REPLACE FUNCTION func_test() RETURNS VOID AS $BODY$ BEGIN CREATE OR REPLACE FUNCTION ...
0
votes
1answer
28 views

Trigger to drop table only if there are no records

How do I write a DDL DROP_TABLE trigger that will only drop the table if there are no records?
0
votes
0answers
41 views

Need to find DDLs that were executed in a week in Oracle 11g

Is there any way to find the list of DDLs that were executed in a period of time in a particular schema? It should contain all types of DDLs that were executed on any of the tables of the schema. ...
2
votes
1answer
85 views

“ERROR: there is no parameter $1” in “EXECUTE .. USING ..;” statement in plpgsql

I have a plpgsql function to create child tables using table inheritance in PostgreSQL like this: CREATE TABLE parent_table ( value integer, end_time timestamp without time zone ); CREATE OR ...
3
votes
1answer
117 views

Trigger actions on database creation or attach

On our dev environment we need to run a bunch of actions when some databases are created or attached. Actions like cleaning up some tables, reseeding some others, changing emails, etc. I was trying to ...
4
votes
0answers
68 views

PostgreSQL: Add or drop column under load give wrong number of columns errors

I have a heavily used PostgreSQL database. Sometimes I need to add/remove columns, preferably without any service interruptions. I follow the safe operations list from ...
3
votes
2answers
99 views

How to capture sp_refreshsqlmodule event

My issue: executing sp_refreshsqlmodule will update the sys.objects.modify_date value, but does not fire a DDL event that can be used by a DDL trigger. So if using a DDL trigger to show object change ...
0
votes
1answer
326 views

How to quickly increase column size in Oracle?

In our Oracle 11 database we have a table with more that 100 million rows and we would like to increase size of one column (not used in any index). I tried to execute command alter table shipment ...
3
votes
1answer
83 views

Reclaim disk space from dropped column without downtime

I have a heavily used table (with around 5 million rows) in a PostgreSQL database in which I want to drop a column and reclaim the space the column used. The docs suggest doing a table rewriting ...
1
vote
1answer
46 views

Get the DDL for all indexes - Oracle

I have about 5 schemas in my oracle 12c database for which I need the DDL for all the indexes for each of the schemas. DDL I have checked it on how to get the code from it, but for all the indexes and ...
3
votes
2answers
139 views

Use composite type to create new table

In ORDBMS databases I have seen that complex types can be used: create type name as( ...) And I can references those types when creating a new table, like: create table example (row_name ...
10
votes
3answers
214 views

Constraint to enforce “at least one” or “exactly one” in a database

Say we have users and each user can have multiple email addresses CREATE TABLE emails ( user_id integer, email_address text, is_active boolean ) Some sample rows user_id | ...
15
votes
2answers
717 views

How to Drop Table with Non-Printable Character on its name

I have a legacy table with a name containing non-printable characters (CHAR(31), to be specific). The non-printable character is beside a underscore, and I've discovered that the shortcut ...
18
votes
2answers
10k views

Best way to populate a new column in a large table?

We have a 2.2 GB table in Postgres with 7,801,611 rows in it. We are adding a uuid/guid column to it and I am wondering what the best way to populate that column is (as we want to add a NOT NULL ...
-4
votes
1answer
60 views

how to create a synonym in Oracle? [closed]

some one tell me the basic syntax for creating synonym for the table employees create synonym for emp for app.employees while creating it shows error ORA-00995: missing or invalid synonym ...
1
vote
1answer
116 views

Determining the specific command type in a DDL trigger

Given strings corresponding to DDL commands, how can I determine which DDL command (column addition, constraint addition etc.) it precisely is? I have a DDL trigger on a database that will be fired ...
4
votes
3answers
258 views

Speed up creation of Postgres partial index

I am trying to create partial indexes for a large (1.2TB), static table in Postgres 9.4. My data is completely static, so I am able to insert all data, then create all indexes. In this 1.2TB table, ...
17
votes
2answers
460 views

Transactional DDL workflow for MySQL

I was a little surprised to discover that DDL statements (alter table, create index etc) implicitly commit the current transaction in MySQL. Coming from MS SQL Server, the ability to do database ...
0
votes
1answer
46 views

Why we can FLASHBACK DROP table where it is DDL command and hence autocommited?

DROP and TRUNCATE both are DDL commands and both are autocommited.Then why we can recover DROP table by using FLASHBACK(unless it is purge) and why we can not recover TRUNCATED data(don't consider ...
1
vote
1answer
31 views

PgTap, unit test a foreign key is deferrable

I am using PgTap to unit test a Postgres (v9.4) database structure in a continuous migration process. It works great. Here is my question: « Is there a way to control that a foreign key constraint is ...
6
votes
1answer
13k views

Add DEFAULT to existing column

In Microsoft SQL server, how can I add/change the default on an existing table column using T-SQL?
1
vote
1answer
422 views

How to track only DDL statements executed in MySQL

Can we track only executed DDL statements in MySQL but not DML statements. I dont want to use either binlog/general log to enable. I just wanted to track only DDL statements. I had gone through the ...
5
votes
2answers
2k views

Postgres DDL and DML best practices and coding standards [closed]

Is there a best practice or coding/design conventions for Postgres both DDL and DML/SQL that you could share and recommend. I am looking for something similar to what Google has for programming. ...
10
votes
2answers
5k views

Is there a means to set the owner of all objects in a PostgreSQL database at the same time?

http://stackoverflow.com/questions/1348126/modify-owner-on-all-tables-simultaneously-in-postgresql describes some nifty ways to change table and other objects to a specific user, and it works ...
8
votes
2answers
5k views

Why is truncate DDL?

I have an interview question, which was asked during my interview. I answered the question, but interviewer was not so convinced with my answer. So, anyone please correct me with my understanding ? ...
2
votes
1answer
231 views

Does PostgreSQL support online schema modification (DDL)?

Recent versions of MySQL (using InnoDB) support many alter table queries without exclusive locking the table. Does PostgreSQL support this to any level? That is, can I add/drop columns from a table ...
1
vote
1answer
74 views

Is there a way to add a column to a table without affecting performance?

How do you add a column to a table in production without affecting its performance? Or is this impossible? I'm asking about Postgres.
12
votes
3answers
14k views

Script out Oracle DDL in an automated fashion

Oracle SQL Developer is able to export DDL through Tools -> Database Export... This works very well, but requires manual intervention. I know of DBMS_METADATA.get_ddl(), but have found that the ...
4
votes
3answers
99 views

PostgreSQL GRANT ALL on mutliple tables using LIKE

I have more than 100 tables named public.test_* How can I easily GRANT ALL access to the user test to all that tables at once? I tried with: GRANT ALL ON TABLE public.test_* TO test; But it is ...
3
votes
1answer
280 views

Drop primary key without dropping an index

Is it possible to drop primary key constraint on a table without dropping the index? I have a situation when I want to remove the PRIMARY KEY to get rid of the NOT NULL constraints and set it to ...
0
votes
1answer
78 views

How to store a version sequence per product

I need to create a table like the following one: +----+---------+---------+ | Id | Product | Version | +----+---------+---------+ | 1 | 1 | 1 | | 2 | 1 | 2 | | 3 | 2 ...
7
votes
1answer
19k views

How can I import the contents of an Oracle database into Visio to create an Entity Relationship Diagram?

I have an Oracle database, and I would like to create an ERD in Visio 2007 Pro. I have so far looked at DBMS_METADATA.GET_DDL commands to generate DDL. I know that I can import an Access DB into ...
4
votes
2answers
15k views

Why can't we write ddl statement directly into the PL/SQL block

Why can't we write ddl statements directly in PL/SQL block, for example when i write CREATE OR REPLACE PROCEDURE test IS BEGIN truncate table table_name; // error END test; / But, CREATE OR ...
3
votes
1answer
61 views

Circular dependency in schema or boolean with CHECK?

Let's say I have the following tables: create table repositories ( id serial primary key, name varchar(255) not null ); create table remotes ( id serial primary key, url varchar(255) ...
1
vote
1answer
47 views

I really can't get rid of these conditional statements in mysqldump?

My mysqldump DDL file is filled with tons of this: /*!50003 CREATE*/ /*!50017 DEFINER=`root`@`localhost`*/ /*!50003 TRIGGER `my_trigger`... I've searched to no avail for an option to silence this. ...
2
votes
1answer
671 views

What means Command column in sp_who2 and text column in sys.dm_exec_sql_text?

I have a script that shows commands being fired in SQL Server 2008 database as follows: --shows who is active and executed commands declare @SPID int=null, @Status varchar(max) = null, @LOGIN ...