per @MichalisDBA
Mention in the docs that to search for a table you have to use $schemas?filter=name==search and not use =like= operator.

@dhrubo Looks like if we omit type attribute from the /_expand data then also omit table attribute, then it's a self join? But your Self Join example and also the key attributes table listing Description showing the Default value: "INNER" seems to conflict with the actual default value of type if its omitted?

Seems we need to fix the documentation, but first, we need to know:

1. What is the join type assumed (default) if table and type are omitted and only fields and on are used with /film/_expand ?
2. What is the join type assumed (default) if table is present and only fields and on are used with /film/_expand ?
3. Or do we throw an error on logic in scenario 1. or 2. because it's not allowed and we need to fix documentation for Joining?

We seem to get below error with Postgres Stored procedure during integration test or while we test /procedure/{procName} endpoint using Postman:

Caused by: org.postgresql.util.PSQLException: ERROR: getmovierentalrateproc(character varying) is a procedure
  Hint: To call a procedure, use CALL.
  Position: 15
	at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2713)

Root cause of the error:

After PostgreSQL 11, PostgreSQL JDBC driver team has introduced a ENUM name EscapeSyntaxCallMode in PostgreSQL driver version 42.2.16...
https://stackoverflow.com/questions/65696904/postgresql-11-stored-procedure-call-error-to-call-a-procedure-use-call-java

Fix:

When we test using Postman, please make sure DB_URL is configured as:
DB_URL=jdbc:postgresql://localhost:5432/sakila?escapeSyntaxCallMode=callIfNoReturn

When running integration test we can add below config to the datasource:
dataSourceBuilder.url(testPostgres.getJdbcUrl() + "&escapeSyntaxCallMode=callIfNoReturn");

kdhrubo/db2rest#497