Macro db_column_to_string 

macro_rules! db_column_to_string {
    ($row:expr, $index:expr) => { ... };
}

Render one column of one row as the string the profiler ingests.

The profiler consumes columns as Vec<String> and re-infers types from the textual form, so every SQL type has to be turned into a faithful string. sqlx offers no backend-agnostic “decode as whatever this is” call, so we try concrete types in order and take the first that decodes.

Order is load-bearing:

• Option<String> first. sqlx skips the type-compatibility check when the value is NULL, so a NULL of any SQL type decodes here as Ok(None). That makes this arm the NULL detector as well as the text arm; everything below it is known to be a non-null value.
• Integers before bool. SQLite stores booleans as INTEGER and will happily decode 42 as true, so trying bool early would render integers as “true”/“false”.
• Widest integer first, so an INT8/BIGINT is not truncated by a narrower arm.

A value whose type matches none of these arms (NUMERIC/DECIMAL, dates and times without the corresponding sqlx feature, BLOB) yields None and is recorded as a null, which is the pre-existing behaviour for those types.