== Abstract Syntax Tree ==
LogicalProject(a=[$0], country=[$1])
+- LogicalTableScan(table=[[default_catalog, default_database, fs_t]])

== Optimized Physical Plan ==
Calc(select=[a, country])
+- TableSourceScan(table=[[default_catalog, default_database, fs_t]], fields=[a, country, v, dt])

== Optimized Execution Plan ==
Calc(select=[a, country])
+- TableSourceScan(table=[[default_catalog, default_database, fs_t]], fields=[a, country, v, dt])
