Method extract_value

nodedb-strict/src/decode.rs:208–234

Extract a column value as a `Value`, performing type-aware decoding. This is the general-purpose extraction path. For hot paths, prefer `extract_fixed_raw` / `extract_variable_raw` to avoid `Value` allocation.

(&self, tuple: &[u8], col_idx: usize)

    /// This is the general-purpose extraction path. For hot paths, prefer
    /// `extract_fixed_raw` / `extract_variable_raw` to avoid `Value` allocation.
    pub fn extract_value(&self, tuple: &[u8], col_idx: usize) -> Result<Value, StrictError> {
        self.check_bounds(col_idx)?;

        if self.is_null(tuple, col_idx)? {
            return Ok(Value::Null);
        }

        let col = &self.schema.columns[col_idx];

        if col.column_type.fixed_size().is_some() {
            let raw = self
                .extract_fixed_raw(tuple, col_idx)?
                .ok_or(StrictError::TypeMismatch {
                    column: col.name.clone(),
                    expected: col.column_type,
                })?;
            Ok(decode_fixed_value(&col.column_type, raw))
        } else {
            let raw =
                self.extract_variable_raw(tuple, col_idx)?
                    .ok_or(StrictError::TypeMismatch {
                        column: col.name.clone(),
                        expected: col.column_type,
                    })?;
            Ok(decode_variable_value(&col.column_type, raw))
        }
    }

    /// Extract all columns from a tuple into a Vec<Value>.
    pub fn extract_all(&self, tuple: &[u8]) -> Result<Vec<Value>, StrictError> {