Struct QueryContextBuilder 

pub struct QueryContextBuilder { /* private fields */ }

QueryContext Builder

Provides a fluent API for constructing QueryContext with complex configurations.

Example

let rctx = Arc::new(QueryRequestContext::new("MATCH (n) RETURN n".to_string()));

let query_context = QueryContextBuilder::new(rctx)
    .with_space_info(space_info)
    .with_charset_info(charset_info)
    .with_start_id(100)
    .with_arena()
    .build();

Implementations

impl QueryContextBuilder

pub fn new(rctx: Arc<QueryRequestContext>) -> Self

Create a new builder with the required QueryRequestContext.

pub fn from_session( rctx: Arc<QueryRequestContext>, space: Option<SpaceSummary>, ) -> Self

Create a builder from session context.

This simplifies the common pattern of creating a QueryContext from a ClientSession, automatically extracting space information.

pub fn with_space_info(self, space_info: SpaceInfo) -> Self

Set the space information.

pub fn with_charset_info(self, charset_info: CharsetInfo) -> Self

Set the charset information.

pub fn with_start_id(self, start_id: i64) -> Self

Set the initial value for the ID generator.

pub fn with_arena(self) -> Self

Enable arena allocation for query execution.

Arena allocation is beneficial for queries that create many temporary data structures during execution. The concrete arena is owned by the execution context; this flag only records the intent.

pub fn with_snapshot_ts(self, snapshot_ts: Timestamp) -> Self

Set the MVCC snapshot timestamp for consistent reads within an explicit transaction. When set, execution reads data as of this timestamp; when absent (None), auto-commit current-version reads.

pub fn snapshot_ts(&self) -> Option<Timestamp>

The configured MVCC snapshot timestamp (if any).

pub fn with_isolation_level( self, isolation_level: TransactionIsolationLevel, ) -> Self

Set the transaction isolation level for an execution inside an explicit transaction. Absent for auto-commit statements.

pub fn isolation_level(&self) -> Option<TransactionIsolationLevel>

The configured transaction isolation level (if any).

pub fn with_password_history_depth(self, depth: usize) -> Self

Set the retained password-history depth applied by user-management operations planned under this context.

pub fn build(self) -> QueryContext

Build the QueryContext.

Panics

Panics if QueryRequestContext was not provided.

Trait Implementations

impl Default for QueryContextBuilder

fn default() -> Self

Returns the “default value” for a type.