Function char_length 

pub fn char_length<'a, V, E>(
    expr: E,
) -> SQLExpr<'a, V, <E::SQLType as LengthPolicy<V::DialectMarker>>::Output, E::Nullable, E::Aggregate>
where
    V: SQLParam + 'a,
    V::DialectMarker: CharLengthPolicy,
    E: Expr<'a, V>,
    E::SQLType: LengthPolicy<V::DialectMarker>,

CHAR_LENGTH - returns the number of characters in a string.

Standard SQL function. Emits CHAR_LENGTH on PostgreSQL, LENGTH on SQLite.

Example

use drizzle_core::expr::char_length;

// SELECT CHAR_LENGTH(users.name)  -- PG
// SELECT LENGTH(users.name)       -- SQLite
let name_len = char_length(users.name);