Struct TextFunctions 

pub struct TextFunctions<'a> {
    pub substring: &'a str,
    pub trim_fraction: &'a dyn Fn(&str) -> String,
    pub concat: &'a dyn Fn(&[&str]) -> String,
}

How an engine spells the text functions float_text uses. Each closure is handed the SQL of its operand.

Fields

substring: &'a str

The engine’s name for the three-argument SUBSTR.

trim_fraction: &'a dyn Fn(&str) -> String

A text that holds a point with its trailing zeros, and then a point left bare, removed: rtrim_fraction where RTRIM takes the characters to remove.

concat: &'a dyn Fn(&[&str]) -> String

Text joined, in the engine’s spelling.