PostgreSQL: Add Limit Parameter
In Oracle I can have an SQL string like this select * from table where rownum <= ? Then in an PreparedStatement I can set the rownum as a parameter. How does it work with Postgres JDBC (Java) with the…
Amazon web services – Error while switching to secondary RDS region using hikari
I have existing code where Datasource is created using hikari. I am working on adding new functionality where if current rds is down application should switch to secondary rds. In docker compose file I added new image for local testing…
Postgresql – Specifying multiple addresses to postgres DB via JDBC driver
When connecting to postgres via psql I connect via: psql 'postgresql://[email protected]:5432,pg-clienthttpfile-dev3.dev-dc2-c1.gb.app:5432/clienthttpfile?connect_timeout=5&target_session_attrs=read-write' I'm trying to connect my app via the JDBC driver and the connection string above does not work: I tried with double and single quotes database.url="jdbc:postgresql://[email protected]:5432,pg-clienthttpfile-dev3.dev-dc2-c1.gb.app:5432/clienthttpfile?connect_timeout=5&target_session_attrs=read-write" database.url='jdbc:postgresql://[email protected]:5432,pg-clienthttpfile-dev3.dev-dc2-c1.gb.app:5432/clienthttpfile?connect_timeout=5&target_session_attrs=read-write' Both throw:…
Amazon web services – PySpark and Docker image amazon/aws-glue-libs
I know very little about Java, but I have a Java question. I’ve got a Docker container for an image called amazon/aws-glue-libs. This lets me run and test AWS Glue ETL code locally on my Mac without having to use…
Postgresql – Postgres error – invalid value for parameter "TimeZone": "CST"
Facing below error while running app from the cloud however this error is not getting when running from the local. Caused by: java.sql.SQLTransientConnectionException: HikariPool-2 - Connection is not available, request timed out after 30000ms. at com.zaxxer.hikari.pool.HikariPool.createTimeoutException(HikariPool.java:695) at com.zaxxer.hikari.pool.HikariPool.getConnection(HikariPool.java:197) at com.zaxxer.hikari.pool.HikariPool.getConnection(HikariPool.java:162)…
How to programmatically interact with both a MySQL 5 database and a MySQL 8 database from a single project?
My goal is to periodically sync data between two databases. One is a "new" database which runs MySQL 8, the other is an "old" database that hasn't been fully decommissioned yet which runs MySQL 5. I want to sync in…
Postgresql – How to perform a select by sections since it contains many records using Java?
I have a table which contains approximately 100,000 records, I did a SELECT to obtain the total number of records because it can vary, I need to consult the table and obtain all the records of 4 specific fields(nombre, apellido,…
why permission denied when i am connecting jdbc to mysql
it gives same error permission denied i thing i try all possible ways to solve it . i am using ubuntu . please if anyone knoe what is the proble help me .. . i change my user in mysql-server…
Postgresql – Postgres unable to detect correct type of integer field as inspected using ResultSetMetaData
I build an Excel document from a result set returned from PostgresQL database. I need to being able to distinguish between decimal (double) and non-decimal (integer) numbers returned by the result set. My SQL looks like followging: ... (select product,…
Postgresql – Java PreparedStatement Error: "Cannot resolve query parameter '2' and '3'"
I am tyring to override a borrowBook interface. What is wrong with my code? Why there are errors such: Cannot resolve query parameter '2' and Cannot resolve query parameter '3'. @Override public void borrowBook(int bookId) throws SQLException { Date currentDate…