Struct QueryEngine 

pub struct QueryEngine { /* private fields */ }

Query engine that executes SQL directly on DataTable

Implementations

impl QueryEngine

pub fn new() -> Self

pub fn with_behavior_config(config: BehaviorConfig) -> Self

pub fn with_date_notation(_date_notation: String) -> Self

pub fn with_case_insensitive(case_insensitive: bool) -> Self

pub fn with_case_insensitive_and_date_notation( case_insensitive: bool, _date_notation: String, ) -> Self

pub fn execute(&self, table: Arc<DataTable>, sql: &str) -> Result<DataView>

Execute a SQL query on a DataTable and return a DataView (for backward compatibility)

pub fn execute_statement( &self, table: Arc<DataTable>, statement: SelectStatement, ) -> Result<DataView>

Execute a parsed SelectStatement on a DataTable and return a DataView

pub fn execute_statement_with_cte_context( &self, table: Arc<DataTable>, statement: SelectStatement, cte_context: &HashMap<String, Arc<DataView>>, ) -> Result<DataView>

Execute a statement with provided CTE context (for subqueries)

pub fn execute_with_plan( &self, table: Arc<DataTable>, sql: &str, ) -> Result<(DataView, ExecutionPlan)>

Execute a query and return both the result and the execution plan

Trait Implementations

impl Clone for QueryEngine

fn clone(&self) -> QueryEngine

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for QueryEngine

fn default() -> Self

Returns the “default value” for a type.

impl GroupByExpressions for QueryEngine

fn group_by_expressions( &self, view: DataView, group_by_exprs: &[SqlExpression], ) -> Result<HashMap<GroupKey, DataView>>

Group rows by evaluating expressions for each row

fn apply_group_by_expressions( &self, view: DataView, group_by_exprs: &[SqlExpression], select_items: &[SelectItem], having: Option<&SqlExpression>, _case_insensitive: bool, date_notation: String, ) -> Result<DataView>

Apply GROUP BY with expressions to the view