Package org.apache.drill.exec.vector.accessor

Interface WriterPosition

All Known Subinterfaces:
OffsetVectorWriter, UnionShim, WriterEvents
All Known Implementing Classes:
AbstractArrayWriter, AbstractArrayWriter.BaseArrayWriter, AbstractFixedWidthWriter, AbstractFixedWidthWriter.BaseFixedWidthWriter, AbstractFixedWidthWriter.BaseIntWriter, AbstractScalarWriterImpl, AbstractTupleWriter, BaseScalarWriter, BaseVarWidthWriter, BitColumnWriter, ColumnAccessors.BigIntColumnWriter, ColumnAccessors.DateColumnWriter, ColumnAccessors.Decimal18ColumnWriter, ColumnAccessors.Decimal28SparseColumnWriter, ColumnAccessors.Decimal38SparseColumnWriter, ColumnAccessors.Decimal9ColumnWriter, ColumnAccessors.Float4ColumnWriter, ColumnAccessors.Float8ColumnWriter, ColumnAccessors.IntColumnWriter, ColumnAccessors.IntervalColumnWriter, ColumnAccessors.IntervalDayColumnWriter, ColumnAccessors.IntervalYearColumnWriter, ColumnAccessors.SmallIntColumnWriter, ColumnAccessors.TimeColumnWriter, ColumnAccessors.TimeStampColumnWriter, ColumnAccessors.TinyIntColumnWriter, ColumnAccessors.UInt1ColumnWriter, ColumnAccessors.UInt2ColumnWriter, ColumnAccessors.UInt4ColumnWriter, ColumnAccessors.UInt8ColumnWriter, ColumnAccessors.Var16CharColumnWriter, ColumnAccessors.VarBinaryColumnWriter, ColumnAccessors.VarCharColumnWriter, ColumnAccessors.VarDecimalColumnWriter, DictEntryWriter, DummyArrayWriter, DummyArrayWriter.DummyOffsetVectorWriter, DummyDictWriter, DummyScalarWriter, EmptyListShim, ListWriterImpl, MapWriter, MapWriter.ArrayMapWriter, MapWriter.DummyArrayMapWriter, MapWriter.DummyMapWriter, MapWriter.SingleMapWriter, NullableScalarWriter, ObjectArrayWriter, ObjectDictWriter, OffsetVectorWriterImpl, RepeatedListWriter, RowSetLoaderImpl, RowSetWriterImpl, ScalarArrayWriter, SimpleListShim, UnionShim.AbstractUnionShim, UnionVectorShim, UnionWriterImpl
public interface WriterPosition
Position information about a writer used during vector overflow.

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    lastWriteIndex()
    Return the last write position in the vector.
    int
    rowStartIndex()
    Position within the vector of the first value for the current row.
    int
    writeIndex()
    Current write index for the writer.

  • Method Details

    • rowStartIndex

      int rowStartIndex()
      Position within the vector of the first value for the current row. Note that this is always the first value for the row, even for a writer deeply nested within a hierarchy of arrays. (The first position for the current array is not exposed in this API.)
      Returns:
      the vector offset of the first value for the current row

    • lastWriteIndex

      int lastWriteIndex()
      Return the last write position in the vector. This may be the same as the writer index position (if the vector was written at that point), or an earlier point. In either case, this value points to the last valid value in the vector.
      Returns:
      index of the last valid value in the vector

    • writeIndex

      int writeIndex()
      Current write index for the writer. This is the global array location for arrays, same as the row index for top-level columns.
      Returns:
      current write index