Function character_length_to_sql

datafusion/sql/src/unparser/utils.rs:522–536

(
    unparser: &Unparser,
    style: CharacterLengthStyle,
    character_length_args: &[Expr],
)

}

pub(crate) fn character_length_to_sql(
    unparser: &Unparser,
    style: CharacterLengthStyle,
    character_length_args: &[Expr],
) -> Result<Option<ast::Expr>> {
    let func_name = match style {
        CharacterLengthStyle::CharacterLength => "character_length",
        CharacterLengthStyle::Length => "length",
    };

    Ok(Some(unparser.scalar_function_to_sql(
        func_name,
        character_length_args,
    )?))
}

/// SQLite does not support timestamp/date scalars like `to_timestamp`, `from_unixtime`, `date_trunc`, etc.
/// This remaps `from_unixtime` to `datetime(expr, 'unixepoch')`, expecting the input to be in seconds.