Column reference by name. Untyped (Expr<any>): nothing is known about a column named by a string. For compile-time checked names and value types use the column refs a typed frame hands to callbacks (df.filter((c) => c.age.gt(18))) or cols<Schema>().
Expr<any>
df.filter((c) => c.age.gt(18))
cols<Schema>()
Column reference by name. Untyped (
Expr<any>): nothing is known about a column named by a string. For compile-time checked names and value types use the column refs a typed frame hands to callbacks (df.filter((c) => c.age.gt(18))) orcols<Schema>().