Function to_char 

pub fn to_char<'a, V, E, F>(
    expr: E,
    format: F,
) -> SQLExpr<'a, V, Text, E::Nullable, Scalar>
where
    V: SQLParam + 'a,
    E: Expr<'a, V>,
    E::SQLType: Temporal,
    F: Expr<'a, V>,

TO_CHAR - formats a temporal expression as text (PostgreSQL).

Returns Text type, preserves nullability of the input expression.

Common Format Patterns

• YYYY - 4-digit year
• MM - month (01-12)
• DD - day of month (01-31)
• HH24 - hour (00-23)
• MI - minute (00-59)
• SS - second (00-59)
• Day - full day name
• Month - full month name

Example

use drizzle_core::expr::to_char;

// SELECT TO_CHAR(users.created_at, 'YYYY-MM-DD')
let formatted = to_char(users.created_at, "YYYY-MM-DD");