Package com.espertech.esper.common.internal.epl.join.exec.base

Interface JoinExecTableLookupStrategy

All Known Implementing Classes:
CompositeTableLookupStrategy, FullTableScanLookupStrategy, FullTableScanUniqueValueLookupStrategy, HistoricalTableLookupStrategy, IndexedTableLookupStrategyHashedExpr, IndexedTableLookupStrategyHashedProp, InKeywordMultiTableLookupStrategyExpr, InKeywordSingleTableLookupStrategyExpr, JoinExecTableLookupStrategyVirtualDW, SortedTableLookupStrategy
public interface JoinExecTableLookupStrategy
Strategy for looking up, in some sort of table or index, an event, potentially based on the events properties, and returning a set of matched events.

  • Method Details

    • lookup

      Set<EventBean> lookup(EventBean theEvent, Cursor cursor, ExprEvaluatorContext exprEvaluatorContext)
      Returns matched events for a event to look up for. Never returns an empty result set, always returns null to indicate no results.
      Parameters:
      theEvent - to look up
      cursor - the path in the query that the lookup took
      exprEvaluatorContext - expression evaluation context
      Returns:
      set of matching events, or null if none matching

    • getLookupStrategyType

      LookupStrategyType getLookupStrategyType()