I think this is the default behavior of BaseColumnInfo (no need for ExprColumn and SQLFragment). See BaseColumnInfo.getValueSql(String tableAliasName)

You're right. Thanks. I updated all three special PG tables

Ugh, this syntax is so weird. PG is very vague about how a VARCHAR gets converted to OID. This is also slightly weirder in that you're using the information_schema where OID doesn't exist.

Something like this against the native schema let's you get the OID directly.

SELECT pg_namespace.nspname as schema_name, pg_class.relname as table_name, pg_table_size(pg_class.oid)
FROM pg_class JOIN pg_namespace ON pg_class.relnamespace = pg_namespace.oid
WHERE pg_class.relkind = 'r' and nspname NOT IN ('pg_catalog', 'information_schema')
ORDER BY schema_name, table_name

I don't see a SQL problem with the original. I just don't know what PG will do when converting the generated string to an OID when the table has double-quotes in the name.

Arg. Stupid quotes.

I created a horrible schema and table name. I verified that quote_ident fixes the problem and resolves to regclass/OID correctly.