Doctrine Migrations: Multiple Schemas With Same Table Name

Question

I am working on integrating Doctrine Migrations into an existing project and in migration files, whenever I call methods on Schema(ex. $schema->getTables()), I get this error:

Executing dry run of migration up to 20180726185129 from 0

  ++ migrating 20180726185129

IN UP
Migration 20180726185129 failed during Execution. Error An exception occurred while executing 'SELECT quote_ident(r.conname) as conname, pg_catalog.pg_get_constraintdef(r.oid, true) as condef
                  FROM pg_catalog.pg_constraint r
                  WHERE r.conrelid =
                  (
                      SELECT c.oid
                      FROM pg_catalog.pg_class c, pg_catalog.pg_namespace n
                      WHERE n.nspname NOT IN ('pg_catalog', 'information_schema', 'pg_toast') AND c.relname = 'config' AND n.nspname = ANY(string_to_array((select replace(replace(setting,'"$user"',user),' ','') from pg_catalog.pg_settings where name = 'search_path'),',')) AND n.oid = c.relnamespace
                  )
                  AND r.contype = 'f'':

SQLSTATE[21000]: Cardinality violation: 7 ERROR:  more than one row returned by a subquery used as an expression

In AbstractPostgreSQLDriver.php line 91:

  An exception occurred while executing 'SELECT quote_ident(r.conname) as con  
  name, pg_catalog.pg_get_constraintdef(r.oid, true) as condef                 
                    FROM pg_catalog.pg_constraint r                            
                    WHERE r.conrelid =                                         
                    (                                                          
                        SELECT c.oid                                           
                        FROM pg_catalog.pg_class c, pg_catalog.pg_namespace n  
                        WHERE n.nspname NOT IN ('pg_catalog', 'information_sc  
  hema', 'pg_toast') AND c.relname = 'config' AND n.nspname = ANY(string_to_a  
  rray((select replace(replace(setting,'"$user"',user),' ','') from pg_catalo  
  g.pg_settings where name = 'search_path'),',')) AND n.oid = c.relnamespace   
                    )                                                          
                    AND r.contype = 'f'':                                      

  SQLSTATE[21000]: Cardinality violation: 7 ERROR:  more than one row returne  
  d by a subquery used as an expression                                        


In PDOConnection.php line 106:

  SQLSTATE[21000]: Cardinality violation: 7 ERROR:  more than one row returne  
  d by a subquery used as an expression                                        


In PDOConnection.php line 104:

  SQLSTATE[21000]: Cardinality violation: 7 ERROR:  more than one row returne  
  d by a subquery used as an expression

I think this is because I have tables named config in two schemas which is why it's getting two rows. I'm not sure how to avoid this issue and there's no option to declare default Schema in migrations.xml or migrations-db.php either.

I would really like to use DBAL in migrations but unfortunately, this leaves me with no option but to use this->addSql().