In this video the database gets stores as target/db.h2.db as he configures
dataSource.setUrl("jdbc:h2:target/db");
as the URL of his DataSource. I am using PostgreSQL and it seems that this does not work the same way. I am using:
dataSource.setUrl("jdbc:postgresql:target/db");
but I'm getting
Caused by: org.postgresql.util.PSQLException: FATAL: database "file:target/db" does not exist
at org.postgresql.core.v3.ConnectionFactoryImpl.readStartupMessages(ConnectionFactoryImpl.java:684)
at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:199)
at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:66)
How can I write my database schema into target as file?
Related
I am trying to import data from my local PostgreSQL database to neo4j
Firstly, I load the JDBC driver into memory
CALL apoc.load.driver("org.postgresql.Driver")
Then, I run this query to ingest data from postgresql
WITH "jdbc:postgresql://localhost:5432/graph-test?user=kt" as url
CALL apoc.load.jdbc(url,"os.operating_systems") YIELD row AS line
MERGE (o:Os {name: line.name})
MERGE (of:OsFamily {name: line.familly})
MERGE (o)-[:FROM]->(of)
Unfortunately, I received this error.
Failed to invoke procedure `apoc.load.jdbc`: Caused by: java.net.ConnectException: Connection refused (Connection refused)
Could this error be caused by the incorrect URL, jdbc plugin version, or something else?
When I try to connect to the database on postgres via jdbc, I get the following error:
org.postgresql.util.PSQLException: ERROR: Unsupported startup parameter: search_path
This is how I create the connection:
val connection = DriverManager.getConnection(profile.connection + Option(profile.catalog).getOrElse("")+ "?currentSchema="+Option(profile.schema).getOrElse(""),
profile.user, profile.password)
I use scala and a custom version of postgres.
pgbauncer
In short, pgbouncer at least my version does not work with the search_path parameter, this discussion led me to this idea. There are two ways to fix this problem:
Change the pgbouncer config file by adding
IGNORE_STARTUP_PARAMETERS: search_path
Make a connection without using the currentSchema parameter in the connection string and create connection like this:
val connection =
DriverManager.getConnection(
profile.connection + Option(profile.catalog).getOrElse(""),
profile.user, profile.password)
Then he will choose the scheme according to the rule set, in search_path, they usually set something like "$user", public, in this case, when connecting, he first tries to choose the same scheme as the user name, and if he does not find such a scheme, he chooses public.
I need connect my Firebird data base (.IDB) in KNIME. I used Database Connector node, but I have this notice:
ERROR Database Connector 0:1 Execute failed: Could not create
connection to database: Invalid connection string
C:\Users\miPC\Desktop\DataBase1.IDB, reason: null or empty database
name in connection string
The error suggest that you have used the following connection string:
jdbc:firebirdsql://C:\Users\miPC\Desktop\DataBase1.IDB
That is incorrect as it is missing the host name. The correct URL would be:
jdbc:firebirdsql://localhost/C:\Users\miPC\Desktop\DataBase1.IDB
Please consult the Jaybird FAQ for valid URL formats.
I am new for SailsJS. I am trying to create database connection with mongo but it shows error like this
A hook (`orm`) failed to load!
error: Error: Consistency violation: A model (`sleep`) references a datastore which cannot be found (`mongo`).
If this model definition has an explicit `connection` property, check that it is spelled correctly.
If not, check your default `connection` (usually located in `config/models.js`).
Finally, check that this connection (`mongo`) is valid as per http://sailsjs.org/documentation/reference/configuration/sails-config-connections.
Your model is connecting to an invalid connection 'mongo'.
Check the connection either in you model 'Sleep' or in config/models.js
I am upgrading my heroku database from a hobby dev to Standard 0 (using the official instructions https://devcenter.heroku.com/articles/upgrading-heroku-postgres-databases#upgrade-with-pg-copy-default).
All went well, until I promoted the new database and restarted the app. I then get the following error:
o.s.boot.SpringApplication : Application startup failed
...
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'flywayInitializer' defined in class path resource [org/springframework/boot/autoconfigure/flyway/FlywayAutoConfiguration$FlywayConfiguration.class]: Invocation of init method failed; nested exception is org.flywaydb.core.api.FlywayException: Unable to obtain Jdbc connection from DataSource
...
Caused by: org.flywaydb.core.api.FlywayException: Unable to obtain Jdbc connection from DataSource
...
Caused by: org.postgresql.util.PSQLException: FATAL: no pg_hba.conf entry for host "54.xxx.xx.xxx", user "u94bf9vxxxxxx", database "d2mqk0b6xxxxxx", SSL off
...
If I swap back to the old database again, everything works again. The only thing that I am changing is the promoted database.
Is there a difference between connecting to hobby and standard databases that I need to be aware of?
The relevant part of my application.yml looks as follows:
spring:
datasource:
driverClassName: org.postgresql.Driver
url: ${JDBC_DATABASE_URL}
username: ${JDBC_DATABASE_USERNAME}
password: ${JDBC_DATABASE_PASSWORD}
flyway:
enabled: true
locations: classpath:db/migrations
Any suggestions on how I can debug this would be very welcome too.
Looks like you aren't connecting with SSL where it is required by Heroku PostgreSQL installs.
See Herokus documentation on SSL for PostgreSQL.
See also Herokus documentation for enabling SSL on JDBC connections.
You will need to add something like &ssl=true&sslfactory=org.postgresql.ssl.NonValidatingFactory to your JDBC URL.