Package com.qfs.column

Interface IColumnarTable

All Superinterfaces:

ITable, IUnnamedColumnarTable

All Known Subinterfaces:

IAggregateStore, IByteRecordBlock, IRecordBlock<RecordT>, ITypedColumnarTable, IWritableByteRecordBlock, IWritableRecordBlock<RecordT>

All Known Implementing Classes:

AggregateStore, AppendOnlyByteRecordBlock, ARecordBlock, ArrowRecordBlock, AWritableFixedSizeRecordBlock, ChunkArray, ChunkSetRecordBlock, DummyRecordBlock, EmptyAggregateStore, FilteredAggregateStoreView, FilteredRecordBlock, MultiColumnarTableWrapper, OffsetRecordBlock, RecordBlock, RecordBlockMeasureStore, ReplicatedAggregateStore, SingleRowDelegateRecordBlock, SingleRowWritableRecordBlock

public interface IColumnarTable
extends IUnnamedColumnarTable

A columnar table where each column is identified by a distinct name.

Author:

ActiveViam

Method Summary

Modifier and Type	Method	Description
int	getColumnIndex(String columnName)	Returns the index of the column with that name (or -1 if it does not exist).
List<String>	getColumnNames()	Returns the names of all the columns in this table.

Methods inherited from interface com.qfs.chunk.ITable

isNull, read, readBoolean, readDouble, readFloat, readInt, readLong

Methods inherited from interface com.qfs.column.IUnnamedColumnarTable

getColumn

Method Details

getColumnNames

List<String> getColumnNames()

Returns the names of all the columns in this table.

Returns:

the names of all the columns

getColumnIndex

int getColumnIndex(String columnName)

Returns the index of the column with that name (or -1 if it does not exist).

Parameters:

columnName - the name of the target column

Returns:

the index of the column with that name