I'm using Esqueleto with Postgres and I don't see a way to specify the schema that a table resides in. Currently I'm issuing the following sql to set the schemas:
set search_path to foo,bar;
This allows me to use the tables I want as long as they are in schema foo or schema bar. Is there a way to just set the schema for each table?
Related
I want to replicate other schemas rather than the public schema. I have configured the sym_trigger table for the different schema but it doesn't work cause there were no sym_* tables in that particular schema. Is there any way to configure the xxxx.properties file or just use this command
alter user {user name} set search_path to {schema name};
and configure the sym_* tables just like public schemas?
The SymmetricDS tables will reside in the schema that is the default schema when you log in. If you want to access non-SymmetricDS tables in different schemas, you need to specify the source_schema_name in sym_trigger.
When collaborating with colleagues I need to change the schema name every time I receive a SQL script (Postgres).
I am only an ordinary user of a corporate database (no permissions to change anything). Also, we are not allowed to create tables in PUBLIC schema. However, we can use (read-only) all the tables from BASE schema.
It is cumbersome for the team of users, where everybody is creating SQL scripts (mostly only for creating tables), which need to be shared amongst others. Every user has its own schema.
Is it possible to change the script below, where I will share the script to another user without the need for the other user to find/replace the schema, in this case, user1?
DROP TABLE IF EXISTS user1.table1;
CREATE TABLE user1.table1 AS
SELECT * FROM base.table1;
You can set the default schema at the start of the script (similar to what pg_dump generates):
set search_path = user1;
DROP TABLE IF EXISTS table1;
CREATE TABLE table1 AS
SELECT * FROM base.table1;
Because the search path was change to contain user1 as the first schema, tables will be searched in that schema when dropping and creating. And because the search path does not include any other schema, no other schema will be consulted.
If you
However the default search_path is "$user", public which means that any unqualified table will be searched or created in a schema with the same name as the current user.
Caution
Note that a DROP TABLE will drop the table in the first schema found in that case. So if table1 doesn't exist in the user's schema, but in the public schema, it would be dropped from the public schema. So for your use-case setting the path to exactly one schema might be more secure.
I am new with DB2.
I am not able to get data from a table without using the schema name. If I use a schema name with table name, I am able to fetch data.
Example:
SELECT * FROM TABLE_NAME;
It is giving me error, while
SELECT FROM SCHEMA_NAME.TABLE_NAME;
is fetching a result.
What do I have to set up not to always have to use the schema name?
By default, your username is used as the schema name for unqualified object names. You can see the current schema with, e.g. VALUES CURRENT SCHEMA. You can change the current schema for you current session with SET SCHEMA new_schema_name, or via e.g. a JDBC connection parameter. Most query tools also have a place to specify/change the current schema.
See the manual page for SET SCHEMA https://www.ibm.com/support/knowledgecenter/en/SSEPGG_11.1.0/com.ibm.db2.luw.sql.ref.doc/doc/r0001016.html
The full rules for the qualification of unqualified objects is here https://www.ibm.com/support/knowledgecenter/en/SSEPGG_11.1.0/com.ibm.db2.luw.sql.ref.doc/doc/r0000720.html#r0000720__unq-alias
E.g.
Unqualified alias, index, package, sequence, table, trigger, and view names are implicitly qualified by the default schema.
However, you can create a public alias for a table, module or sequence if you wish to be able to reference it regardless of your CURRENT SCHEMA value.
https://www.ibm.com/support/knowledgecenter/SSEPGG_11.5.0/com.ibm.db2.luw.sql.ref.doc/doc/r0000910.html
(P.S. all the above assumes you are using Db2 LUW)
Try using SET SCHEMA to set the default schema to be used in the session:
SET SCHEMA SCHEMA_NAME;
SELECT * FROM TABLE_NAME;
When using DBeaver - right click on connection > Connection Settings > Initialization, and select your default DB and default Schema:
After that, open your SQL Script and select Active DB:
Encountered this issue when trying to modify the search_path to my new Redshift db.
Presently, I've migrated the contents of my MySQL db into a redshift cluster via AWS' Data Migration Service. The data was imported into a schema lets call my_schema. When I try to execute queries against the cluster it requires me to prefix table names with the schema name
i.e.
select * from my_schema.my_table
I wanted to change the setup so that I can reference the table directly without needing the prefix. After a bit of looking around I found out that this was possible by modifying the search_path attribute.
First I tried doing this by running
set search_path = "$user", my_schema;
This appeared to work but then I realized that this was simply setting my_schema as the default schema in the context of the current session, I wanted it set on a database level. I found several sources saying that the way to do this was to use the alter command like so...
alter database my_db set search_path = "$user", public, my_schema
However, running this command results in the following error which somehow shows up in 0 google results:
SET/RESET commmand in ALTER DATABASE is not supported
I'm pretty baffled by how the above error hasn't ever had a post made about it but I'm also pretty interested in figuring out how to resolve my initial issue of setting a global default schema for my redshift cluster.
ALTER DATABASE SET is not supported in Redshift. However you can SET/RESET configuration parameters at USER level using the ALTER USER SET SEARCH_PATH TO <SCHEMA1>,<SCHMEA2>;
Please check: http://docs.aws.amazon.com/redshift/latest/dg/r_ALTER_USER.html
http://docs.aws.amazon.com/redshift/latest/dg/r_search_path.html
When you set the search_path to <SCHEMA1>,<SCHMEA2> in db1 for a user it is not for just current session, it will be set for all future sessions.
I am using PostGIS which defines three schema (Base, layers and public) I have tables defined in all three schemas but when I login with the commandline \z shows only those table in the public schema.
This happens if I connect with postgres or another user that actually owns the tables. I am clearly missing something...
\dp or \z will only show tables in the search_path.
If you're using multiple schemas, you may want to add them to your default search_path for your interactive login user (ALTER USER ... SET search_path ...) or in your .psqlrc.