Package io.trino.operator

Class RowReferencePageManager.LoadCursor

java.lang.Object
io.trino.operator.RowReferencePageManager.LoadCursor
All Implemented Interfaces:
RowReference, AutoCloseable
Enclosing class:
RowReferencePageManager
public static final class RowReferencePageManager.LoadCursor extends Object implements RowReference, AutoCloseable
Cursor that allows callers to advance through the registered page and dictate whether a specific position should be preserved with a stable row ID. Row ID generation can be expensive in tight loops, so this allows callers to quickly skip positions that won't be needed.

  • Method Details

    • advance

      public boolean advance()

    • compareTo

      public int compareTo(RowIdComparisonStrategy strategy, long rowId)
      Description copied from interface: RowReference
      Compares the referenced row to the specified row ID using the provided RowIdComparisonStrategy.
      Specified by:
      compareTo in interface RowReference

    • equals

      public boolean equals(RowIdHashStrategy strategy, long rowId)
      Description copied from interface: RowReference
      Checks equality of the referenced row with the specified row ID using the provided RowIdHashStrategy.
      Specified by:
      equals in interface RowReference

    • hash

      public long hash(RowIdHashStrategy strategy)
      Description copied from interface: RowReference
      Calculates the hash of the referenced row using the provided RowIdHashStrategy.
      Specified by:
      hash in interface RowReference

    • allocateRowId

      public long allocateRowId()
      Description copied from interface: RowReference
      Allocate a stable row ID that can be used to reference this row at a future point.
      Specified by:
      allocateRowId in interface RowReference

    • close

      public void close()
      Specified by:
      close in interface AutoCloseable