Struct EvalCtx 

pub struct EvalCtx<'a> {
    pub row: &'a [Value],
    pub columns: &'a [ColumnInfo],
    pub rowid: Option<i64>,
    pub params: &'a Params,
    pub anon_counter: Cell<usize>,
    pub subqueries: Option<&'a dyn Subqueries>,
}

The row context an expression is evaluated against.

Fields

row: &'a [Value]

Column values for the current row (with rowid aliasing already applied).

columns: &'a [ColumnInfo]

Metadata for each column in row, by the same index.

rowid: Option<i64>

The current row’s rowid, if scanning a table.

params: &'a Params

Bound parameters.

anon_counter: Cell<usize>

Running counter of anonymous ? parameters seen so far.

subqueries: Option<&'a dyn Subqueries>

Subquery runner, if the executor supplied one.

Implementations

impl<'a> EvalCtx<'a>

pub fn rowless(params: &'a Params) -> EvalCtx<'a>

A context with no row (for SELECT <expr> without a FROM).

pub fn with_subqueries(self, s: &'a dyn Subqueries) -> EvalCtx<'a>

Attach a subquery runner (builder style).