Struct ColumnTypes 

pub struct ColumnTypes {
    pub numeric: Vec<String>,
    pub text: Vec<String>,
    pub json: Vec<String>,
}

The column types a pushed plan assumes (see Pushdown::column_types).

Fields

numeric: Vec<String>

Columns compared with a numeric literal.

text: Vec<String>

Columns compared with a text literal.

json: Vec<String>

Columns the plan extracts a JSON path from on the strength of the column’s declaration alone (the hop carried no <json>): the pushed json_extract is the scan’s only where the catalog declares the column json, since the scan grafts a leaf only as declared (spec: Grafting).

Implementations

impl ColumnTypes

pub fn is_empty(&self) -> bool

pub fn unmet(&self, catalog: &[(String, bool, bool)]) -> Vec<String>

The assumptions a catalog does not bear out: the columns compared with a number that are not numeric-typed, and those compared with text that are. catalog lists every column of the tables read, with whether its type is numeric and whether it is declared json; names meet without regard to case. A column the catalog does not list is unknown, and counts as unmet.

Trait Implementations

impl Clone for ColumnTypes

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ColumnTypes

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ColumnTypes

fn default() -> Self

Returns the “default value” for a type.

impl Eq for ColumnTypes

impl PartialEq for ColumnTypes

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ColumnTypes