Postgres query doesn't accept double quote around schema name in query statement

[Michael Xu <online.mxu@xxxxxxxxx>]

Hi,

By default, pgsql accepts double quotes around schema's name in a query, e.g. select * from "ads"."MyTableName". In our env, it throws 42P01:relation "ads.MyTableName" does not exist. It is okay if no double quote around schema name, select * from ads."MyTableName". 

Is there settings in pssql server or db level to change it back to its default to allow double quotes around schema. 

We're using PostgreSQL 13.7 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-10), 64-bit 

Thanks!

Michael