I know that there are a lot of topics about abandoned connections , however I can’t figure out what is the problem in my case, so I really hope for some help. I have a Java application with Spring, which fetches some data from external services, and tries to save it in database. I have the following configuration for JDBC
Tag: postgresql
org.postgresql.util.PSQLException: ERROR: relation “app_user” does not exist
I have an application that I’m using spring boot and postgres. I’m getting this error when I try to create a user. When I run this query on my database, I get the same error: But if I change that to: It works. How can I configure that on my spring boot app? dependencies in pom.xml: application.properties: My entity: I’m
EclipseLink Query – Select count(*) from student s not working
I am getting following exception :- [13, 13] The left expression is missing from the arithmetic expression. [14, 14] The right expression is missing from the arithmetic expression. Please help me analyse the problem. P.S. If I replace the above query in my code with select * from student s, it is working fine. UPDATE 1 Answer Try using select
Flyway Migration with java
I learnt flywaydb migration with java works with JDBC connection and also spring support through SpringTemplate, but flyway doesn’t work with DAOs. for tables/entities with more relationships,it makes life much easier to do migration with DAO’s rather than sql. is there a solution or work-around to deal with this ? Answer First, Flyway has its own transaction managing system and
Hibernate mapping between PostgreSQL enum and Java enum
Background Spring 3.x, JPA 2.0, Hibernate 4.x, Postgresql 9.x. Working on a Hibernate mapped class with an enum property that I want to map to a Postgresql enum. Problem Querying with a where clause on the enum column throws an exception. Code (heavily simplified) SQL: Hibernate mapped class: Java that calls the query: Hibernate xml query: Troubleshooting Querying by id
Postgres – Column out of range in PreparedStatement – java
got a problem with a preparedstatement using Java 1.7.0.67 on Windows 8.1… Basically I get an error as follows (from the test): I can see it’s telling me I have no ? but they are there for all to see in the before setString message. Can anyone see what is wrong with what I’m doing – I’m new to PreparedStatements
Can’t instantiate class using Hibernate createQuery
I’m trying to use hibernate to create objects, which are not domain models, but I get a incomprehensible error message. My Java code: The class: Stacktrace: The schema for the table: Versions: Frankly, i’m clueless about why it cannot instantiate this class. Answer You get a NullPointerException in the constructor, so the time argument that your query retrieves from the
How to use PostgreSQL hstore/json with JdbcTemplate
Is there a way to use PostgreSQL json/hstore with JdbcTemplate? esp query support. for eg: hstore: for Json Answer Although quite late for an answer (for the insert part), I hope it might be useful someone else: Take the key/value pairs in a HashMap: use one of the following way to insert them to PostgreSQL: 1) 2) 3) Set hstoreMap/jsonbObj
org.postgresql.util.PSQLException: ERROR: syntax error near «,» in Java
The below is the query generate by a prepareStatement in Java: The Java code is: The query is executed int the try statement and insert the values properly in the DB, BUT it also throws the below exception, at line 192: here ‘val’: The error trace relate to postgres is here: By the way, the table has a bigserial value
JDBCTemplate set nested POJO with BeanPropertyRowMapper
Given the following example POJO’s: (Assume Getters and Setters for all properties) One can easily query a database (postgres in my case) and populate a list of Message classes using a BeanPropertyRowMapper where the db field matched the property in the POJO: (Assume the DB tables have corresponding fields to the POJO properties). I’m wondering – is there a convenient