Function cast 

pub fn cast(expr: Expr, to: &str) -> Expr

Create a CAST(expr AS type) expression.

The to parameter is parsed as a data type name. Common built-in types (INT, BIGINT, VARCHAR, BOOLEAN, TIMESTAMP, etc.) are recognized directly. More complex types (e.g. "DECIMAL(10,2)", "ARRAY<INT>") are parsed via the full SQL parser as a fallback.

Examples

use polyglot_sql::builder::{cast, col};

let expr = cast(col("id"), "VARCHAR");
assert_eq!(expr.to_sql(), "CAST(id AS VARCHAR)");