Struct QueryPk 

pub struct QueryPk {
    pub table: TableId,
    pub index: Option<IndexId>,
    pub select: Vec<ColumnId>,
    pub pk_filter: Expr,
    pub filter: Option<Expr>,
    pub limit: Option<i64>,
    pub order: Option<Direction>,
    pub cursor: Option<Value>,
}

Queries a table by primary key (or secondary index) with optional filtering, ordering, and pagination.

This is the primary read operation for key-value drivers. The driver applies pk_filter against the index, then applies the optional post-filter, and returns up to limit rows in the requested order.

Examples

use toasty_core::driver::operation::{QueryPk, Operation};

let op = QueryPk {
    table: table_id,
    index: None, // query the primary key
    select: vec![col_a, col_b],
    pk_filter: pk_expr,
    filter: None,
    limit: Some(10),
    order: None,
    cursor: None,
};
let operation: Operation = op.into();

Fields

table: TableId

The table to query.

index: Option<IndexId>

Index to query. None means the primary key; Some(id) means a secondary index.

select: Vec<ColumnId>

Which columns to include in the returned rows.

pk_filter: Expr

Filter expression applied against the index key columns.

filter: Option<Expr>

Optional post-filter applied to rows after the index scan, before returning results to the caller.

limit: Option<i64>

Maximum number of rows to return. None means no limit.

order: Option<Direction>

Sort key ordering direction for tables with a composite primary key. None uses the driver’s default ordering.

cursor: Option<Value>

Pagination cursor. Contains the serialized key of the last item from a previous page of results. When set, the query resumes after this key.

Trait Implementations

impl Clone for QueryPk

fn clone(&self) -> QueryPk

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for QueryPk

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

Formats the value using the given formatter.

impl From<QueryPk> for Operation

fn from(value: QueryPk) -> Self

Converts to this type from the input type.