$filter not working in JPA/Olingo 2.0.11 with MySQL

Question

Olingo2 version 2.0.11 has problem with spring-boot-starter-web version 2.0.0 or above!

I made an odata service with olingo2, jpa

Answer 1

Does not solve the original issue and is not the most efficient way.. but here is a workaround for how to remove the incorrect 'escape' statement with only one slash:

public class SqlStatementInspector implements StatementInspector {

    private static final long serialVersionUID = 1L;
    private static final Logger LOG = Logger.getLogger(SqlStatementInspector.class);

    @Override
    public String inspect(String sql) {
        if (!sql.contains("escape \'\\'")) {
            return sql;
        }
        // OData JPA query correction -> current version (2.0.11) contains
        // the invalid 'escape "\"' statement that delivers no results
        LOG.info("Replacing invalid statement: escape \"\\\"");
        return sql.replace("escape \'\\'", "");
    }
}

This overwrites the inspect method and you can modify the generated sql query when using hibernate

in my persistence.xml file i then need to set the property "hibernate.session_factory.statement_inspector" to connect my StatementInspector implementation with my hibernate session factory

<property
                name="hibernate.session_factory.statement_inspector"
                value="SqlStatementInspector" />

i don't know how exactly this would work with spring-boot but maybe there is a similiar property for your application.properties?