When I want to use a Mysql database in a Springboot app, I am able to create it on start via a string in properties similar to this:
spring.datasource.jdbc-url=jdbc:mysql://localhost:3306/testDb?createDatabaseIfNotExist=true&autoReconnect=true&useSSL=false&allowPublicKeyRetrieval=true
Nevertheless PostgreSQL seems to ignore this:
spring.datasource.jdbc-url=jdbc:postgresql://localhost:5432/testdb?createDatabaseIfNotExist=true&autoReconnect=true&useSSL=false&allowPublicKeyRetrieval=true
Is there a way to create a PostgreSQL db on start of a SpringBoot app before Flyway attempts to initiate tables?
Postgres doesn't support creating a database on demand via the JDBC URL. You can learn about what configuration is possible in the documentation.
Related
I am trying to use IBM APP Connect Enterprise to connect to a Postgresql Datasource and execute Database complex queries (Complex SELECT, INSERT, UPDATE Statements)
All I can find is the loopback node which is using limited (select, insert and update) statements.
Is there any option that I can include an esql having a PASSTHRU function as the one used with ODBC (Oracle datasources)?
You could use App Connect for the interactions with Postgresql: https://www.ibm.com/docs/en/app-connect/containers_cd?topic=examples-connecting-app-connect-postgresql
You should be able to call your App Connecto flow using a Callable Flow (via the Switch Server): https://www.ibm.com/docs/en/app-connect/12.0?topic=pecf-preparing-environment-split-processing-between-app-connect-enterprise-app-connect-cloud
You should be able to add a postgresql database as an ODBC database through the UnixODBC layer (i.e. add an entry to the odbcinst.ini file), it's not directly supported though, so if you find an issue you'd need to reproduce with a supported database.
I haven't tried it myself yet, I should hopefully have time in the not too distant future.
Searching the internet for "unixodbc postgres odbcinst.ini" gave some good results, which is where I'd start.
I would like to develop a ER diagram using DBeaver (Eclipse plugin) for a database that doesn't yet exist. Also, the database server doesn't exist.
Can DBeaver be used to develop a ER diagram without connecting to an existing database server? I can only find documentation for working with an existing database or connecting to an existing database server.
Nope, sorry.
DBeaver tools are always associated with the current connection.
For example, in the ERD when adding tables, DBeaver often sends requests to the database of foreign keys.
You can use standard sample SQLite database in DBeaver for experiments.
I am using the script of the spring.io/spring-roo/#running-from-shell fast guide, a 10 lines example.
The only modification is the jpa setup --provider line, changed to connect PostgreSQL (HIBERNATE --database POSTGRES). All the steps and code are at this roo_hello2pg.md github document.
The application.properties seems
spring.datasource.driver-class-name=org.postgresql.Driver
spring.datasource.url=jdbc\:postgresql\://localhost\:5432/hello2bd
spring.datasource.username=postgres
spring.datasource.password=postgres
What more I need? Some spring.jpa.hibernate lines? The browser generates error "status=500" when use database (insert a value).
As I could see in your gitHub repository, you have configured your connection to the Postgres database correctly.
But did you create the hello2db database and the Timer table in your system?
As the Spring Boot documentation sais, JPA databases will be automatically created only if you use an embedded database (H2, HSQL or Derby)
Check http://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#boot-features-creating-and-dropping-jpa-databases
In your case, to create the database automatically using a Postgres DB, you should include the spring.jpa.hibernate.ddl-auto=create-drop property in the application.properties file.
Hope it helps,
Sorry for the basic question. I'm totally new to Wildfly and MongoDB (in fact, I am new to nosql also).
I need to know, is that possible to add MongoDB datasource in wildfly? If yes, then how can I do that?
I have done few tutorials using MySQL and Postgres, it seems like it works very well with those DBs. However, when I tried using MongoDB driver, it's not working as expected.
There is a JDBC driver available for MongoDB from Unity you can download it here. Using it should be able to create a Datasource on MangoDB as well as fire standard SQL queries too.
The database class name will be mongodb.jdbc.MongoDriver and the database url will be of the format jdbc:mongo://<serverName>/<databaseName>
in icCube 5.1 there is no Redshift as list of supported JDBC connections.
How to create a data source in icCube on Amazon Redshift ?
A first solution is using the Postgres jdbc driver. Redshift is based on Postgres so it also works (for how long is a good question).
The second is a bit more complicated as you need to add Reshift jdbc driver to icCube. First download jdbc driver from amazon from here, after follow this instructions to add a library to icCube.
Once done you've to configure a new data-source :