Struct EvalContext 

pub struct EvalContext<'a> {
    pub columns: &'a [ColumnSchema],
    pub table_alias: Option<&'a str>,
    pub params: &'a [Value],
    pub default_text_search_config: Option<&'a str>,
}

Resolution context for evaluating a single row. table_alias is the alias (or table name) callers should accept as the qualifier on a column ref — e.g. FROM users AS u makes u.name valid and rejects other.name.

Fields

columns: &'a [ColumnSchema]

table_alias: Option<&'a str>

params: &'a [Value]

v6.1.1 — bound parameters for $N placeholders inside the expression tree. Empty for simple queries; populated by the prepared-statement Execute path with Bind values converted to Value. Index N (1-based per PG) hits params[N-1].

default_text_search_config: Option<&'a str>

v7.12.1 — session text-search config (from SET default_text_search_config = '<name>'). Resolved when the engine builds an EvalContext and consumed by the FTS function dispatcher when to_tsvector(text) / plainto_tsquery(text) etc are called without an explicit config arg. None falls through to simple.

Implementations

impl<'a> EvalContext<'a>

pub const fn new( columns: &'a [ColumnSchema], table_alias: Option<&'a str>, ) -> Self

pub const fn with_params(self, params: &'a [Value]) -> Self

v6.1.1 — attach a parameter buffer for $N placeholder resolution. The slice must outlive the context; callers construct it from the prepared statement’s Bind values.

pub const fn with_default_text_search_config(self, cfg: Option<&'a str>) -> Self

v7.12.1 — attach the session’s default_text_search_config. Used by the FTS function dispatcher when no explicit config arg is given.

Trait Implementations

impl<'a> Clone for EvalContext<'a>

fn clone(&self) -> EvalContext<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for EvalContext<'a>

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

Formats the value using the given formatter.