github.com/cockroachdb/cockroach@v20.2.0-alpha.1+incompatible/pkg/sql/opt/xform/testdata/coster/virtual-scan (about)

     1  opt
     2  SELECT * FROM information_schema.schemata WHERE SCHEMA_NAME='public'
     3  ----
     4  select
     5   ├── columns: catalog_name:2!null schema_name:3!null default_character_set_name:4 sql_path:5
     6   ├── stats: [rows=10, distinct(3)=1, null(3)=0]
     7   ├── cost: 1100.03
     8   ├── fd: ()-->(3)
     9   ├── scan information_schema.schemata
    10   │    ├── columns: catalog_name:2!null schema_name:3!null default_character_set_name:4 sql_path:5
    11   │    ├── stats: [rows=1000, distinct(2)=100, null(2)=0, distinct(3)=100, null(3)=0]
    12   │    └── cost: 1090.02
    13   └── filters
    14        └── schema_name:3 = 'public' [outer=(3), constraints=(/3: [/'public' - /'public']; tight), fd=()-->(3)]