Is it possible to specify the schema when connecting to postgres with JDBC?

问题

Is it possible? Can i specify it on the connection URL? How to do that?

回答1:

I know this was answered already, but I just ran into the same issue trying to specify the schema to use for the liquibase command line.

Update As of JDBC v9.4 you can specify the url with the new currentSchema parameter like so:

jdbc:postgresql://localhost:5432/mydatabase?currentSchema=myschema

Appears based on an earlier patch:

http://web.archive.org/web/20141025044151/http://postgresql.1045698.n5.nabble.com/Patch-to-allow-setting-schema-search-path-in-the-connectionURL-td2174512.html

Which proposed url's like so:

jdbc:postgresql://localhost:5432/mydatabase?searchpath=myschema

回答2:

As of version 9.4, you can use the currentSchema parameter in your connection string.

For example:

jdbc:postgresql://localhost:5432/mydatabase?currentSchema=myschema

回答3:

If it is possible in your environment, you could also set the user's default schema to your desired schema:

ALTER USER user_name SET search_path to 'schema'

回答4:

I don't believe there is a way to specify the schema in the connection string. It appears you have to execute

set search_path to 'schema'

after the connection is made to specify the schema.

回答5:

I submitted an updated version of a patch to the PostgreSQL JDBC driver to enable this a few years back. You'll have to build the PostreSQL JDBC driver from source (after adding in the patch) to use it:

http://archives.postgresql.org/pgsql-jdbc/2008-07/msg00012.php

http://jdbc.postgresql.org/

回答6:

DataSource – setCurrentSchema

When instantiating a DataSource implementation, look for a method to set the current/default schema.

For example, on the PGSimpleDataSource class call setCurrentSchema.

org.postgresql.ds.PGSimpleDataSource dataSource = new org.postgresql.ds.PGSimpleDataSource ( );
dataSource.setServerName ( "localhost" );
dataSource.setDatabaseName ( "your_db_here_" );
dataSource.setPortNumber ( 5432 );
dataSource.setUser ( "postgres" );
dataSource.setPassword ( "your_password_here" );
dataSource.setCurrentSchema ( "your_schema_name_here_" );  // <----------

If left unspecified, Postgres attempts to connect to a schema named public.

回答7:

Don't forget SET SCHEMA 'myschema' which you could use in a separate Statement

SET SCHEMA 'value' is an alias for SET search_path TO value. Only one schema can be specified using this syntax.

And since 9.4 and possibly earlier versions on the JDBC driver, there is support for the setSchema(String schemaName) method.

回答8:

In Go with "sql.DB" (note the search_path with underscore):

postgres://user:password@host/dbname?sslmode=disable&search_path=schema

来源：https://stackoverflow.com/questions/4168689/is-it-possible-to-specify-the-schema-when-connecting-to-postgres-with-jdbc