The parser has issues with heredocs such as:

    result = query(<<-SQL, name)
      SELECT i.relname, d.indisunique, a.attname
        FROM pg_class t, pg_class i, pg_index d, pg_attribute a
       WHERE i.relkind = 'i'
         AND d.indexrelid = i.oid
         AND d.indisprimary = 'f'
         AND t.oid = d.indrelid
         AND t.relname = '#{table_name}'
         AND a.attrelid = t.oid
         AND ( d.indkey[0]=a.attnum OR d.indkey[1]=a.attnum
            OR d.indkey[2]=a.attnum OR d.indkey[3]=a.attnum
            OR d.indkey[4]=a.attnum OR d.indkey[5]=a.attnum
            OR d.indkey[6]=a.attnum OR d.indkey[7]=a.attnum
            OR d.indkey[8]=a.attnum OR d.indkey[9]=a.attnum )
      ORDER BY i.relname
    SQL

This results in a couple of test failures, not sure what the user impact is. (The snippet is from ruby/test/unit/data/testfiles/postgresql_adapter.rb).