/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.phoenix.index;
import java.io.ByteArrayInputStream;
import java.io.DataInput;
import java.io.DataInputStream;
import java.io.DataOutput;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.CellUtil;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.KeyValue.Type;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.Durability;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.io.WritableUtils;
import org.apache.phoenix.hbase.index.ValueGetter;
import org.apache.phoenix.hbase.index.covered.update.ColumnReference;
import org.apache.phoenix.hbase.index.util.ImmutableBytesPtr;
import org.apache.phoenix.hbase.index.util.KeyValueBuilder;
import org.apache.phoenix.hbase.index.util.IndexManagementUtil.ReferencingColumn;
import org.apache.phoenix.query.QueryConstants;
import org.apache.phoenix.schema.PColumn;
import org.apache.phoenix.schema.PColumnFamily;
import org.apache.phoenix.schema.PDataType;
import org.apache.phoenix.schema.PDatum;
import org.apache.phoenix.schema.PIndexState;
import org.apache.phoenix.schema.PTable;
import org.apache.phoenix.schema.PTable.IndexType;
import org.apache.phoenix.schema.PTableType;
import org.apache.phoenix.schema.RowKeySchema;
import org.apache.phoenix.schema.SaltingUtil;
import org.apache.phoenix.schema.SortOrder;
import org.apache.phoenix.schema.ValueSchema;
import org.apache.phoenix.schema.ValueSchema.Field;
import org.apache.phoenix.util.BitSet;
import org.apache.phoenix.util.ByteUtil;
import org.apache.phoenix.util.IndexUtil;
import org.apache.phoenix.util.MetaDataUtil;
import org.apache.phoenix.util.SchemaUtil;
import org.apache.phoenix.util.TrustedByteArrayOutputStream;
import com.google.common.base.Predicate;
import com.google.common.collect.Iterators;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;
/**
*
* Class that builds index row key from data row key and current state of
* row and caches any covered columns. Client-side serializes into byte array using
* @link #serialize(PTable, ImmutableBytesWritable)}
* and transmits to server-side through either the
* {@link org.apache.phoenix.index.PhoenixIndexCodec#INDEX_MD}
* Mutation attribute or as a separate RPC call using
* {@link org.apache.phoenix.cache.ServerCacheClient})
*
*
* @since 2.1.0
*/
public class IndexMaintainer implements Writable, Iterable<ColumnReference> {
public static IndexMaintainer create(PTable dataTable, PTable index) {
if (dataTable.getType() == PTableType.INDEX || index.getType() != PTableType.INDEX || !dataTable.getIndexes().contains(index)) {
throw new IllegalArgumentException();
}
IndexMaintainer maintainer = new IndexMaintainer(dataTable, index);
int indexPosOffset = (index.getBucketNum() == null ? 0 : 1) + (maintainer.isMultiTenant ? 1 : 0) + (maintainer.viewIndexId == null ? 0 : 1);
RowKeyMetaData rowKeyMetaData = maintainer.getRowKeyMetaData();
int indexColByteSize = 0;
for (int i = indexPosOffset; i < index.getPKColumns().size(); i++) {
PColumn indexColumn = index.getPKColumns().get(i);
int indexPos = i - indexPosOffset;
PColumn column = IndexUtil.getDataColumn(dataTable, indexColumn.getName().getString());
boolean isPKColumn = SchemaUtil.isPKColumn(column);
if (isPKColumn) {
int dataPkPos = dataTable.getPKColumns().indexOf(column) - (dataTable.getBucketNum() == null ? 0 : 1) - (maintainer.isMultiTenant ? 1 : 0);
rowKeyMetaData.setIndexPkPosition(dataPkPos, indexPos);
} else {
indexColByteSize += column.getDataType().isFixedWidth() ? SchemaUtil.getFixedByteSize(column) : ValueSchema.ESTIMATED_VARIABLE_LENGTH_SIZE;
maintainer.getIndexedColumnTypes().add(column.getDataType());
maintainer.getIndexedColumns().add(new ColumnReference(column.getFamilyName().getBytes(), column.getName().getBytes()));
}
if (indexColumn.getSortOrder() == SortOrder.DESC) {
rowKeyMetaData.getDescIndexColumnBitSet().set(indexPos);
}
}
for (int i = 0; i < index.getColumnFamilies().size(); i++) {
PColumnFamily family = index.getColumnFamilies().get(i);
for (PColumn indexColumn : family.getColumns()) {
PColumn column = IndexUtil.getDataColumn(dataTable, indexColumn.getName().getString());
maintainer.getCoverededColumns().add(new ColumnReference(column.getFamilyName().getBytes(), column.getName().getBytes()));
}
}
maintainer.estimatedIndexRowKeyBytes = maintainer.estimateIndexRowKeyByteSize(indexColByteSize);
maintainer.initCachedState();
return maintainer;
}
public static Iterator<PTable> nonDisabledIndexIterator(Iterator<PTable> indexes) {
return Iterators.filter(indexes, new Predicate<PTable>() {
@Override
public boolean apply(PTable index) {
return !PIndexState.DISABLE.equals(index.getIndexState());
}
});
}
/**
* For client-side to serialize all IndexMaintainers for a given table
* @param dataTable data table
* @param ptr bytes pointer to hold returned serialized value
*/
public static void serialize(PTable dataTable, ImmutableBytesWritable ptr) {
List<PTable> indexes = dataTable.getIndexes();
serialize(dataTable, ptr, indexes);
}
/**
* For client-side to serialize all IndexMaintainers for a given table
* @param dataTable data table
* @param ptr bytes pointer to hold returned serialized value
* @param indexes indexes to serialize
*/
public static void serialize(PTable dataTable, ImmutableBytesWritable ptr,
List<PTable> indexes) {
Iterator<PTable> indexesItr = nonDisabledIndexIterator(indexes.iterator());
if ((dataTable.isImmutableRows()) || !indexesItr.hasNext()) {
ptr.set(ByteUtil.EMPTY_BYTE_ARRAY);
return;
}
int nIndexes = 0;
int estimatedSize = dataTable.getRowKeySchema().getEstimatedByteSize() + 2;
while (indexesItr.hasNext()) {
nIndexes++;
PTable index = indexesItr.next();
estimatedSize += index.getIndexMaintainer(dataTable).getEstimatedByteSize();
}
TrustedByteArrayOutputStream stream = new TrustedByteArrayOutputStream(estimatedSize + 1);
DataOutput output = new DataOutputStream(stream);
try {
// Encode data table salting in sign of number of indexes
WritableUtils.writeVInt(output, nIndexes * (dataTable.getBucketNum() == null ? 1 : -1));
// Write out data row key schema once, since it's the same for all index maintainers
dataTable.getRowKeySchema().write(output);
indexesItr = nonDisabledIndexIterator(indexes.iterator());
while (indexesItr.hasNext()) {
indexesItr.next().getIndexMaintainer(dataTable).write(output);
}
} catch (IOException e) {
throw new RuntimeException(e); // Impossible
}
ptr.set(stream.getBuffer(), 0, stream.size());
}
public static List<IndexMaintainer> deserialize(ImmutableBytesWritable metaDataPtr,
KeyValueBuilder builder) {
return deserialize(metaDataPtr.get(), metaDataPtr.getOffset(), metaDataPtr.getLength());
}
public static List<IndexMaintainer> deserialize(byte[] buf) {
return deserialize(buf, 0, buf.length);
}
public static List<IndexMaintainer> deserialize(byte[] buf, int offset, int length) {
ByteArrayInputStream stream = new ByteArrayInputStream(buf, offset, length);
DataInput input = new DataInputStream(stream);
List<IndexMaintainer> maintainers = Collections.emptyList();
try {
int size = WritableUtils.readVInt(input);
boolean isDataTableSalted = size < 0;
size = Math.abs(size);
RowKeySchema rowKeySchema = new RowKeySchema();
rowKeySchema.readFields(input);
maintainers = Lists.newArrayListWithExpectedSize(size);
for (int i = 0; i < size; i++) {
IndexMaintainer maintainer = new IndexMaintainer(rowKeySchema, isDataTableSalted);
maintainer.readFields(input);
maintainers.add(maintainer);
}
} catch (IOException e) {
throw new RuntimeException(e); // Impossible
}
return maintainers;
}
private byte[] viewIndexId;
private boolean isMultiTenant;
private Set<ColumnReference> indexedColumns;
private Set<ColumnReference> coveredColumns;
private Set<ColumnReference> allColumns;
private List<PDataType> indexedColumnTypes;
private RowKeyMetaData rowKeyMetaData;
private byte[] indexTableName;
private int nIndexSaltBuckets;
private byte[] dataEmptyKeyValueCF;
private ImmutableBytesPtr emptyKeyValueCFPtr;
private int nDataCFs;
private boolean indexWALDisabled;
private boolean isLocalIndex;
// Transient state
private final boolean isDataTableSalted;
private final RowKeySchema dataRowKeySchema;
private List<ImmutableBytesPtr> indexQualifiers;
private int estimatedIndexRowKeyBytes;
private int[] dataPkPosition;
private int maxTrailingNulls;
private ColumnReference dataEmptyKeyValueRef;
private IndexMaintainer(RowKeySchema dataRowKeySchema, boolean isDataTableSalted) {
this.dataRowKeySchema = dataRowKeySchema;
this.isDataTableSalted = isDataTableSalted;
}
private IndexMaintainer(PTable dataTable, PTable index) {
this(dataTable.getRowKeySchema(), dataTable.getBucketNum() != null);
this.isMultiTenant = dataTable.isMultiTenant();
this.viewIndexId = index.getViewIndexId() == null ? null : MetaDataUtil.getViewIndexIdDataType().toBytes(index.getViewIndexId());
this.isLocalIndex = index.getIndexType() == IndexType.LOCAL;
RowKeySchema dataRowKeySchema = dataTable.getRowKeySchema();
boolean isDataTableSalted = dataTable.getBucketNum() != null;
byte[] indexTableName = index.getPhysicalName().getBytes();
// Use this for the nDataSaltBuckets as we need this for local indexes
// TODO: persist nDataSaltBuckets separately, but maintain b/w compat.
Integer nIndexSaltBuckets = isLocalIndex ? dataTable.getBucketNum() : index.getBucketNum();
boolean indexWALDisabled = index.isWALDisabled();
int indexPosOffset = (index.getBucketNum() == null ? 0 : 1) + (this.isMultiTenant ? 1 : 0) + (this.viewIndexId == null ? 0 : 1);
int nIndexColumns = index.getColumns().size() - indexPosOffset;
int nIndexPKColumns = index.getPKColumns().size() - indexPosOffset;
int indexedColumnsCount = 0;
for (int i = indexPosOffset; i<index.getPKColumns().size();i++) {
PColumn indexColumn = index.getPKColumns().get(i);
PColumn column = IndexUtil.getDataColumn(dataTable, indexColumn.getName().getString());
boolean isPKColumn = SchemaUtil.isPKColumn(column);
if (!isPKColumn) {
indexedColumnsCount++;
}
}
int indexPkColumnCount = this.dataRowKeySchema.getFieldCount() + indexedColumnsCount - (isDataTableSalted ? 1 : 0) - (isMultiTenant ? 1 : 0);
this.rowKeyMetaData = newRowKeyMetaData(indexPkColumnCount);
BitSet bitSet = this.rowKeyMetaData.getViewConstantColumnBitSet();
int dataPosOffset = (isDataTableSalted ? 1 : 0) + (this.isMultiTenant ? 1 : 0);
int nDataPKColumns = dataRowKeySchema.getFieldCount() - dataPosOffset;
// For indexes on views, we need to remember which data columns are "constants"
// These are the values in a VIEW where clause. For these, we don't put them in the
// index, as they're the same for every row in the index.
if (dataTable.getType() == PTableType.VIEW) {
List<PColumn>dataPKColumns = dataTable.getPKColumns();
for (int i = dataPosOffset; i < dataPKColumns.size(); i++) {
PColumn dataPKColumn = dataPKColumns.get(i);
if (dataPKColumn.getViewConstant() != null) {
bitSet.set(i);
nDataPKColumns--;
}
}
}
this.indexTableName = indexTableName;
this.indexedColumns = Sets.newLinkedHashSetWithExpectedSize(nIndexPKColumns-nDataPKColumns);
this.indexedColumnTypes = Lists.<PDataType>newArrayListWithExpectedSize(nIndexPKColumns-nDataPKColumns);
this.coveredColumns = Sets.newLinkedHashSetWithExpectedSize(nIndexColumns-nIndexPKColumns);
this.allColumns = Sets.newLinkedHashSetWithExpectedSize(nDataPKColumns + nIndexColumns);
this.allColumns.addAll(indexedColumns);
this.allColumns.addAll(coveredColumns);
this.nIndexSaltBuckets = nIndexSaltBuckets == null ? 0 : nIndexSaltBuckets;
this.dataEmptyKeyValueCF = SchemaUtil.getEmptyColumnFamily(dataTable);
this.emptyKeyValueCFPtr = SchemaUtil.getEmptyColumnFamilyPtr(index);
this.nDataCFs = dataTable.getColumnFamilies().size();
this.indexWALDisabled = indexWALDisabled;
}
public byte[] buildRowKey(ValueGetter valueGetter, ImmutableBytesWritable rowKeyPtr, byte[] regionStartKey, byte[] regionEndKey) {
ImmutableBytesWritable ptr = new ImmutableBytesWritable();
boolean prependRegionStartKey = isLocalIndex && regionStartKey != null;
boolean isIndexSalted = !isLocalIndex && nIndexSaltBuckets > 0;
int prefixKeyLength =
prependRegionStartKey ? (regionStartKey.length != 0 ? regionStartKey.length
: regionEndKey.length) : 0;
TrustedByteArrayOutputStream stream = new TrustedByteArrayOutputStream(estimatedIndexRowKeyBytes + (prependRegionStartKey ? prefixKeyLength : 0));
DataOutput output = new DataOutputStream(stream);
try {
// For local indexes, we must prepend the row key with the start region key
if (prependRegionStartKey) {
if (regionStartKey.length == 0) {
output.write(new byte[prefixKeyLength]);
} else {
output.write(regionStartKey);
}
}
if (isIndexSalted) {
output.write(0); // will be set at end to index salt byte
}
// The dataRowKeySchema includes the salt byte field,
// so we must adjust for that here.
int dataPosOffset = isDataTableSalted ? 1 : 0 ;
BitSet viewConstantColumnBitSet = this.rowKeyMetaData.getViewConstantColumnBitSet();
int nIndexedColumns = getIndexPkColumnCount() - getNumViewConstants();
int[][] dataRowKeyLocator = new int[2][nIndexedColumns];
// Skip data table salt byte
int maxRowKeyOffset = rowKeyPtr.getOffset() + rowKeyPtr.getLength();
dataRowKeySchema.iterator(rowKeyPtr, ptr, dataPosOffset);
if (isMultiTenant) {
dataRowKeySchema.next(ptr, dataPosOffset, maxRowKeyOffset);
output.write(ptr.get(), ptr.getOffset(), ptr.getLength());
if (!dataRowKeySchema.getField(dataPosOffset).getDataType().isFixedWidth()) {
output.writeByte(QueryConstants.SEPARATOR_BYTE);
}
dataPosOffset++;
}
if (viewIndexId != null) {
output.write(viewIndexId);
}
// Write index row key
for (int i = dataPosOffset; i < dataRowKeySchema.getFieldCount(); i++) {
Boolean hasValue=dataRowKeySchema.next(ptr, i, maxRowKeyOffset);
// Ignore view constants from the data table, as these
// don't need to appear in the index (as they're the
// same for all rows in this index)
if (!viewConstantColumnBitSet.get(i)) {
int pos = rowKeyMetaData.getIndexPkPosition(i-dataPosOffset);
if (Boolean.TRUE.equals(hasValue)) {
dataRowKeyLocator[0][pos] = ptr.getOffset();
dataRowKeyLocator[1][pos] = ptr.getLength();
} else {
dataRowKeyLocator[0][pos] = 0;
dataRowKeyLocator[1][pos] = 0;
}
}
}
BitSet descIndexColumnBitSet = rowKeyMetaData.getDescIndexColumnBitSet();
int j = 0;
Iterator<ColumnReference> iterator = indexedColumns.iterator();
for (int i = 0; i < nIndexedColumns; i++) {
PDataType dataColumnType;
boolean isNullable = true;
boolean isDataColumnInverted = false;
SortOrder dataSortOrder = SortOrder.getDefault();
if (dataPkPosition[i] == -1) {
dataColumnType = indexedColumnTypes.get(j);
ImmutableBytesPtr value = valueGetter.getLatestValue(iterator.next());
if (value == null) {
ptr.set(ByteUtil.EMPTY_BYTE_ARRAY);
} else {
ptr.set(value.copyBytesIfNecessary());
}
j++;
} else {
Field field = dataRowKeySchema.getField(dataPkPosition[i]);
dataColumnType = field.getDataType();
ptr.set(rowKeyPtr.get(), dataRowKeyLocator[0][i], dataRowKeyLocator[1][i]);
dataSortOrder = field.getSortOrder();
isDataColumnInverted = dataSortOrder != SortOrder.ASC;
isNullable = field.isNullable();
}
PDataType indexColumnType = IndexUtil.getIndexColumnDataType(isNullable, dataColumnType);
boolean isBytesComparable = dataColumnType.isBytesComparableWith(indexColumnType) ;
if (isBytesComparable && isDataColumnInverted == descIndexColumnBitSet.get(i)) {
output.write(ptr.get(), ptr.getOffset(), ptr.getLength());
} else {
if (!isBytesComparable) {
indexColumnType.coerceBytes(ptr, dataColumnType, dataSortOrder, SortOrder.getDefault());
}
if (descIndexColumnBitSet.get(i) != isDataColumnInverted) {
writeInverted(ptr.get(), ptr.getOffset(), ptr.getLength(), output);
} else {
output.write(ptr.get(), ptr.getOffset(), ptr.getLength());
}
}
if (!indexColumnType.isFixedWidth()) {
output.writeByte(QueryConstants.SEPARATOR_BYTE);
}
}
int length = stream.size();
int minLength = length - maxTrailingNulls;
byte[] indexRowKey = stream.getBuffer();
// Remove trailing nulls
while (length > minLength && indexRowKey[length-1] == QueryConstants.SEPARATOR_BYTE) {
length--;
}
if (isIndexSalted) {
// Set salt byte
byte saltByte = SaltingUtil.getSaltingByte(indexRowKey, SaltingUtil.NUM_SALTING_BYTES, length-SaltingUtil.NUM_SALTING_BYTES, nIndexSaltBuckets);
indexRowKey[0] = saltByte;
}
return indexRowKey.length == length ? indexRowKey : Arrays.copyOf(indexRowKey, length);
} catch (IOException e) {
throw new RuntimeException(e); // Impossible
} finally {
try {
stream.close();
} catch (IOException e) {
throw new RuntimeException(e); // Impossible
}
}
}
/*
* Build the data row key from the index row key
*/
public byte[] buildDataRowKey(ImmutableBytesWritable indexRowKeyPtr, byte[][] viewConstants) {
RowKeySchema indexRowKeySchema = getIndexRowKeySchema();
ImmutableBytesWritable ptr = new ImmutableBytesWritable();
TrustedByteArrayOutputStream stream = new TrustedByteArrayOutputStream(estimatedIndexRowKeyBytes);
DataOutput output = new DataOutputStream(stream);
// Increment dataPosOffset until all have been written
int dataPosOffset = 0;
int viewConstantsIndex = 0;
try {
int indexPosOffset = !isLocalIndex && nIndexSaltBuckets > 0 ? 1 : 0;
int maxRowKeyOffset = indexRowKeyPtr.getOffset() + indexRowKeyPtr.getLength();
indexRowKeySchema.iterator(indexRowKeyPtr, ptr, indexPosOffset);
if (isDataTableSalted) {
dataPosOffset++;
output.write(0); // will be set at end to salt byte
}
if (isMultiTenant) {
indexRowKeySchema.next(ptr, indexPosOffset, maxRowKeyOffset);
output.write(ptr.get(), ptr.getOffset(), ptr.getLength());
if (!dataRowKeySchema.getField(dataPosOffset).getDataType().isFixedWidth()) {
output.writeByte(QueryConstants.SEPARATOR_BYTE);
}
indexPosOffset++;
dataPosOffset++;
}
indexPosOffset = (!isLocalIndex && nIndexSaltBuckets > 0 ? 1 : 0) + (isMultiTenant ? 1 : 0) + (viewIndexId == null ? 0 : 1);
BitSet viewConstantColumnBitSet = this.rowKeyMetaData.getViewConstantColumnBitSet();
BitSet descIndexColumnBitSet = rowKeyMetaData.getDescIndexColumnBitSet();
for (int i = dataPosOffset; i < dataRowKeySchema.getFieldCount(); i++) {
// Write view constants from the data table, as these
// won't appear in the index (as they're the
// same for all rows in this index)
if (viewConstantColumnBitSet.get(i)) {
output.write(viewConstants[viewConstantsIndex++]);
} else {
int pos = rowKeyMetaData.getIndexPkPosition(i-dataPosOffset);
Boolean hasValue=indexRowKeySchema.iterator(indexRowKeyPtr, ptr, pos + indexPosOffset+1);
if (Boolean.TRUE.equals(hasValue)) {
// Write data row key value taking into account coercion and inversion
// if necessary
Field dataField = dataRowKeySchema.getField(i);
Field indexField = indexRowKeySchema.getField(pos + indexPosOffset);
PDataType indexColumnType = indexField.getDataType();
PDataType dataColumnType = dataField.getDataType();
SortOrder dataSortOrder = dataField.getSortOrder();
SortOrder indexSortOrder = indexField.getSortOrder();
boolean isDataColumnInverted = dataSortOrder != SortOrder.ASC;
boolean isBytesComparable = dataColumnType.isBytesComparableWith(indexColumnType) ;
if (isBytesComparable && isDataColumnInverted == descIndexColumnBitSet.get(pos)) {
output.write(ptr.get(), ptr.getOffset(), ptr.getLength());
} else {
if (!isBytesComparable) {
dataColumnType.coerceBytes(ptr, indexColumnType, indexSortOrder, SortOrder.getDefault());
}
if (descIndexColumnBitSet.get(pos) != isDataColumnInverted) {
writeInverted(ptr.get(), ptr.getOffset(), ptr.getLength(), output);
} else {
output.write(ptr.get(), ptr.getOffset(), ptr.getLength());
}
}
}
}
if (!dataRowKeySchema.getField(i).getDataType().isFixedWidth() && ((i+1) != dataRowKeySchema.getFieldCount())) {
output.writeByte(QueryConstants.SEPARATOR_BYTE);
}
}
int length = stream.size();
int minLength = length - maxTrailingNulls;
byte[] dataRowKey = stream.getBuffer();
// Remove trailing nulls
while (length > minLength && dataRowKey[length-1] == QueryConstants.SEPARATOR_BYTE) {
length--;
}
// TODO: need to capture nDataSaltBuckets instead of just a boolean. For now,
// we store this in nIndexSaltBuckets, as we only use this function for local indexes
// in which case nIndexSaltBuckets would never be used. Note that when we do add this
// to be serialized, we have to add it at the end and allow for the value not being
// there to maintain compatibility between an old client and a new server.
if (isDataTableSalted) {
// Set salt byte
byte saltByte = SaltingUtil.getSaltingByte(dataRowKey, SaltingUtil.NUM_SALTING_BYTES, length-SaltingUtil.NUM_SALTING_BYTES, nIndexSaltBuckets);
dataRowKey[0] = saltByte;
}
return dataRowKey.length == length ? dataRowKey : Arrays.copyOf(dataRowKey, length);
} catch (IOException e) {
throw new RuntimeException(e); // Impossible
} finally {
try {
stream.close();
} catch (IOException e) {
throw new RuntimeException(e); // Impossible
}
}
}
/*
* return the view index id from the index row key
*/
public byte[] getViewIndexIdFromIndexRowKey(ImmutableBytesWritable indexRowKeyPtr) {
assert(isLocalIndex);
RowKeySchema indexRowKeySchema = getIndexRowKeySchema();
// TODO add logic to skip region start key as well because we cannot find the region startkey in indexhalfstorefilereader.
ImmutableBytesWritable ptr = new ImmutableBytesWritable();
TrustedByteArrayOutputStream stream =
new TrustedByteArrayOutputStream(estimatedIndexRowKeyBytes);
DataOutput output = new DataOutputStream(stream);
try {
int indexPosOffset = (!isLocalIndex && nIndexSaltBuckets > 0 ? 1 : 0) + (isMultiTenant ? 1 : 0) + (viewIndexId == null ? 0 : 1);
Boolean hasValue =
indexRowKeySchema.iterator(indexRowKeyPtr, ptr, indexPosOffset);
if (Boolean.TRUE.equals(hasValue)) {
output.write(ptr.get(), ptr.getOffset(), ptr.getLength());
}
int length = stream.size();
byte[] dataRowKey = stream.getBuffer();
return dataRowKey.length == length ? dataRowKey : Arrays.copyOf(dataRowKey, length);
} catch (IOException e) {
throw new RuntimeException(e); // Impossible
} finally {
try {
stream.close();
} catch (IOException e) {
throw new RuntimeException(e); // Impossible
}
}
}
private volatile RowKeySchema indexRowKeySchema;
// We have enough information to generate the index row key schema
private RowKeySchema generateIndexRowKeySchema() {
int nIndexedColumns = getIndexPkColumnCount() + (isMultiTenant ? 1 : 0) + (!isLocalIndex && nIndexSaltBuckets > 0 ? 1 : 0) + (viewIndexId != null ? 1 : 0) - getNumViewConstants();
RowKeySchema.RowKeySchemaBuilder builder = new RowKeySchema.RowKeySchemaBuilder(nIndexedColumns);
if (!isLocalIndex && nIndexSaltBuckets > 0) {
builder.addField(SaltingUtil.SALTING_COLUMN, false, SortOrder.ASC);
nIndexedColumns--;
}
int dataPosOffset = isDataTableSalted ? 1 : 0 ;
if (isMultiTenant) {
builder.addField(dataRowKeySchema.getField(dataPosOffset++));
nIndexedColumns--;
}
if (viewIndexId != null) {
nIndexedColumns--;
builder.addField(new PDatum() {
@Override
public boolean isNullable() {
return false;
}
@Override
public PDataType getDataType() {
return MetaDataUtil.getViewIndexIdDataType();
}
@Override
public Integer getMaxLength() {
return null;
}
@Override
public Integer getScale() {
return null;
}
@Override
public SortOrder getSortOrder() {
return SortOrder.getDefault();
}
}, false, SortOrder.getDefault());
}
Field[] indexFields = new Field[nIndexedColumns];
BitSet viewConstantColumnBitSet = this.rowKeyMetaData.getViewConstantColumnBitSet();
// Add Field for all data row pk columns
for (int i = dataPosOffset; i < dataRowKeySchema.getFieldCount(); i++) {
// Ignore view constants from the data table, as these
// don't need to appear in the index (as they're the
// same for all rows in this index)
if (!viewConstantColumnBitSet.get(i)) {
int pos = rowKeyMetaData.getIndexPkPosition(i-dataPosOffset);
indexFields[pos] = dataRowKeySchema.getField(i);
}
}
int indexedColumnTypesIndex = 0;
for (Field indexField : indexFields) {
if (indexField == null) { // Add field for kv column in index
final PDataType dataType = indexedColumnTypes.get(indexedColumnTypesIndex++);
builder.addField(new PDatum() {
@Override
public boolean isNullable() {
return true;
}
@Override
public PDataType getDataType() {
return IndexUtil.getIndexColumnDataType(true, dataType);
}
@Override
public Integer getMaxLength() {
return null;
}
@Override
public Integer getScale() {
return null;
}
@Override
public SortOrder getSortOrder() {
return SortOrder.getDefault();
}
}, true, SortOrder.getDefault());
} else { // add field from data row key
builder.addField(indexField);
}
}
return builder.build();
}
private int getNumViewConstants() {
BitSet bitSet = this.rowKeyMetaData.getViewConstantColumnBitSet();
int num = 0;
for(int i = 0; i<dataRowKeySchema.getFieldCount();i++){
if(bitSet.get(i)) num++;
}
return num;
}
private RowKeySchema getIndexRowKeySchema() {
if (indexRowKeySchema != null) {
return indexRowKeySchema;
}
synchronized (this) {
if (indexRowKeySchema == null) {
indexRowKeySchema = generateIndexRowKeySchema();
}
}
return indexRowKeySchema;
}
public Put buildUpdateMutation(KeyValueBuilder kvBuilder, ValueGetter valueGetter, ImmutableBytesWritable dataRowKeyPtr, long ts, byte[] regionStartKey, byte[] regionEndKey) throws IOException {
Put put = null;
// New row being inserted: add the empty key value
if (valueGetter.getLatestValue(dataEmptyKeyValueRef) == null) {
byte[] indexRowKey = this.buildRowKey(valueGetter, dataRowKeyPtr, regionStartKey, regionEndKey);
put = new Put(indexRowKey);
// add the keyvalue for the empty row
put.add(kvBuilder.buildPut(new ImmutableBytesPtr(indexRowKey),
this.getEmptyKeyValueFamily(), QueryConstants.EMPTY_COLUMN_BYTES_PTR, ts,
ByteUtil.EMPTY_BYTE_ARRAY_PTR));
put.setDurability(!indexWALDisabled ? Durability.USE_DEFAULT : Durability.SKIP_WAL);
}
int i = 0;
for (ColumnReference ref : this.getCoverededColumns()) {
ImmutableBytesPtr cq = this.indexQualifiers.get(i++);
ImmutableBytesPtr value = valueGetter.getLatestValue(ref);
byte[] indexRowKey = this.buildRowKey(valueGetter, dataRowKeyPtr, regionStartKey, regionEndKey);
ImmutableBytesPtr rowKey = new ImmutableBytesPtr(indexRowKey);
if (value != null) {
if (put == null) {
put = new Put(indexRowKey);
put.setDurability(!indexWALDisabled ? Durability.USE_DEFAULT : Durability.SKIP_WAL);
}
//this is a little bit of extra work for installations that are running <0.94.14, but that should be rare and is a short-term set of wrappers - it shouldn't kill GC
put.add(kvBuilder.buildPut(rowKey, ref.getFamilyWritable(), cq, ts, value));
}
}
return put;
}
public boolean isRowDeleted(Collection<KeyValue> pendingUpdates) {
int nDeleteCF = 0;
for (KeyValue kv : pendingUpdates) {
if (kv.getTypeByte() == KeyValue.Type.DeleteFamily.getCode()) {
nDeleteCF++;
boolean isEmptyCF = Bytes.compareTo(kv.getFamilyArray(), kv.getFamilyOffset(), kv.getFamilyLength(),
dataEmptyKeyValueCF, 0, dataEmptyKeyValueCF.length) == 0;
// This is what a delete looks like on the client side for immutable indexing...
if (isEmptyCF) {
return true;
}
}
}
// This is what a delete looks like on the server side for mutable indexing...
return nDeleteCF == this.nDataCFs;
}
private boolean hasIndexedColumnChanged(ValueGetter oldState, Collection<KeyValue> pendingUpdates) throws IOException {
if (pendingUpdates.isEmpty()) {
return false;
}
Map<ColumnReference,KeyValue> newState = Maps.newHashMapWithExpectedSize(pendingUpdates.size());
for (KeyValue kv : pendingUpdates) {
newState.put(new ColumnReference(CellUtil.cloneFamily(kv), CellUtil.cloneQualifier(kv)), kv);
}
for (ColumnReference ref : indexedColumns) {
KeyValue newValue = newState.get(ref);
if (newValue != null) { // Indexed column has potentially changed
ImmutableBytesPtr oldValue = oldState.getLatestValue(ref);
boolean newValueSetAsNull = newValue.getTypeByte() == Type.DeleteColumn.getCode();
//If the new column value has to be set as null and the older value is null too,
//then just skip to the next indexed column.
if (newValueSetAsNull && oldValue == null) {
continue;
}
if ((oldValue == null && !newValueSetAsNull) || (oldValue != null && newValueSetAsNull)) {
return true;
}
// If the old value is different than the new value, the index row needs to be deleted
if (Bytes.compareTo(oldValue.get(), oldValue.getOffset(), oldValue.getLength(),
newValue.getValueArray(), newValue.getValueOffset(), newValue.getValueLength()) != 0) {
return true;
}
}
}
return false;
}
/**
* Used for immutable indexes that only index PK column values. In that case, we can handle a data row deletion,
* since we can build the corresponding index row key.
*/
public Delete buildDeleteMutation(KeyValueBuilder kvBuilder, ImmutableBytesWritable dataRowKeyPtr, long ts) throws IOException {
return buildDeleteMutation(kvBuilder, null, dataRowKeyPtr, Collections.<KeyValue>emptyList(), ts, null, null);
}
@SuppressWarnings("deprecation")
public Delete buildDeleteMutation(KeyValueBuilder kvBuilder, ValueGetter oldState, ImmutableBytesWritable dataRowKeyPtr, Collection<KeyValue> pendingUpdates, long ts, byte[] regionStartKey, byte[] regionEndKey) throws IOException {
byte[] indexRowKey = this.buildRowKey(oldState, dataRowKeyPtr, regionStartKey, regionEndKey);
// Delete the entire row if any of the indexed columns changed
if (oldState == null || isRowDeleted(pendingUpdates) || hasIndexedColumnChanged(oldState, pendingUpdates)) { // Deleting the entire row
Delete delete = new Delete(indexRowKey, ts);
delete.setDurability(!indexWALDisabled ? Durability.USE_DEFAULT : Durability.SKIP_WAL);
return delete;
}
Delete delete = null;
// Delete columns for missing key values
for (KeyValue kv : pendingUpdates) {
if (kv.getTypeByte() != KeyValue.Type.Put.getCode()) {
ColumnReference ref = new ColumnReference(kv.getFamily(), kv.getQualifier());
if (coveredColumns.contains(ref)) {
if (delete == null) {
delete = new Delete(indexRowKey);
delete.setDurability(!indexWALDisabled ? Durability.USE_DEFAULT : Durability.SKIP_WAL);
}
delete.deleteColumns(ref.getFamily(), IndexUtil.getIndexColumnName(ref.getFamily(), ref.getQualifier()), ts);
}
}
}
return delete;
}
public byte[] getIndexTableName() {
return indexTableName;
}
public Set<ColumnReference> getCoverededColumns() {
return coveredColumns;
}
public Set<ColumnReference> getIndexedColumns() {
return indexedColumns;
}
public Set<ColumnReference> getAllColumns() {
return allColumns;
}
public ImmutableBytesPtr getEmptyKeyValueFamily() {
// Since the metadata of an index table will never change,
// we can infer this based on the family of the first covered column
// If if there are no covered columns, we know it's our default name
return emptyKeyValueCFPtr;
}
private RowKeyMetaData getRowKeyMetaData() {
return rowKeyMetaData;
}
private List<PDataType> getIndexedColumnTypes() {
return indexedColumnTypes;
}
@Override
public void readFields(DataInput input) throws IOException {
int encodedIndexSaltBucketsAndMultiTenant = WritableUtils.readVInt(input);
isMultiTenant = encodedIndexSaltBucketsAndMultiTenant < 0;
nIndexSaltBuckets = Math.abs(encodedIndexSaltBucketsAndMultiTenant) - 1;
int encodedIndexedColumnsAndViewId = WritableUtils.readVInt(input);
boolean hasViewIndexId = encodedIndexedColumnsAndViewId < 0;
if (hasViewIndexId) {
// Fixed length
viewIndexId = new byte[MetaDataUtil.getViewIndexIdDataType().getByteSize()];
input.readFully(viewIndexId);
}
int nIndexedColumns = Math.abs(encodedIndexedColumnsAndViewId) - 1;
indexedColumns = Sets.newLinkedHashSetWithExpectedSize(nIndexedColumns);
for (int i = 0; i < nIndexedColumns; i++) {
byte[] cf = Bytes.readByteArray(input);
byte[] cq = Bytes.readByteArray(input);
indexedColumns.add(new ColumnReference(cf,cq));
}
indexedColumnTypes = Lists.newArrayListWithExpectedSize(nIndexedColumns);
for (int i = 0; i < nIndexedColumns; i++) {
PDataType type = PDataType.values()[WritableUtils.readVInt(input)];
indexedColumnTypes.add(type);
}
int encodedCoveredolumnsAndLocalIndex = WritableUtils.readVInt(input);
isLocalIndex = encodedCoveredolumnsAndLocalIndex < 0;
int nCoveredColumns = Math.abs(encodedCoveredolumnsAndLocalIndex) - 1;
coveredColumns = Sets.newLinkedHashSetWithExpectedSize(nCoveredColumns);
for (int i = 0; i < nCoveredColumns; i++) {
byte[] cf = Bytes.readByteArray(input);
byte[] cq = Bytes.readByteArray(input);
coveredColumns.add(new ColumnReference(cf,cq));
}
indexTableName = Bytes.readByteArray(input);
dataEmptyKeyValueCF = Bytes.readByteArray(input);
emptyKeyValueCFPtr = new ImmutableBytesPtr(Bytes.readByteArray(input));
rowKeyMetaData = newRowKeyMetaData();
rowKeyMetaData.readFields(input);
int nDataCFs = WritableUtils.readVInt(input);
// Encode indexWALDisabled in nDataCFs
indexWALDisabled = nDataCFs < 0;
this.nDataCFs = Math.abs(nDataCFs) - 1;
this.estimatedIndexRowKeyBytes = WritableUtils.readVInt(input);
initCachedState();
}
@Override
public void write(DataOutput output) throws IOException {
// Encode nIndexSaltBuckets and isMultiTenant together
WritableUtils.writeVInt(output, (nIndexSaltBuckets + 1) * (isMultiTenant ? -1 : 1));
// Encode indexedColumns.size() and whether or not there's a viewIndexId
WritableUtils.writeVInt(output, (indexedColumns.size() + 1) * (viewIndexId != null ? -1 : 1));
if (viewIndexId != null) {
output.write(viewIndexId);
}
for (ColumnReference ref : indexedColumns) {
Bytes.writeByteArray(output, ref.getFamily());
Bytes.writeByteArray(output, ref.getQualifier());
}
for (int i = 0; i < indexedColumnTypes.size(); i++) {
PDataType type = indexedColumnTypes.get(i);
WritableUtils.writeVInt(output, type.ordinal());
}
// Encode coveredColumns.size() and whether or not this is a local index
WritableUtils.writeVInt(output, (coveredColumns.size() + 1) * (isLocalIndex ? -1 : 1));
for (ColumnReference ref : coveredColumns) {
Bytes.writeByteArray(output, ref.getFamily());
Bytes.writeByteArray(output, ref.getQualifier());
}
Bytes.writeByteArray(output, indexTableName);
Bytes.writeByteArray(output, dataEmptyKeyValueCF);
WritableUtils.writeVInt(output,emptyKeyValueCFPtr.getLength());
output.write(emptyKeyValueCFPtr.get(),emptyKeyValueCFPtr.getOffset(), emptyKeyValueCFPtr.getLength());
rowKeyMetaData.write(output);
// Encode indexWALDisabled in nDataCFs
WritableUtils.writeVInt(output, (nDataCFs + 1) * (indexWALDisabled ? -1 : 1));
WritableUtils.writeVInt(output, estimatedIndexRowKeyBytes);
}
public int getEstimatedByteSize() {
int size = WritableUtils.getVIntSize(nIndexSaltBuckets);
size += WritableUtils.getVIntSize(estimatedIndexRowKeyBytes);
size += WritableUtils.getVIntSize(indexedColumns.size());
size += viewIndexId == null ? 0 : viewIndexId.length;
for (ColumnReference ref : indexedColumns) {
size += WritableUtils.getVIntSize(ref.getFamily().length);
size += ref.getFamily().length;
size += WritableUtils.getVIntSize(ref.getQualifier().length);
size += ref.getQualifier().length;
}
size += indexedColumnTypes.size();
size += WritableUtils.getVIntSize(coveredColumns.size());
for (ColumnReference ref : coveredColumns) {
size += WritableUtils.getVIntSize(ref.getFamily().length);
size += ref.getFamily().length;
size += WritableUtils.getVIntSize(ref.getQualifier().length);
size += ref.getQualifier().length;
}
size += indexTableName.length + WritableUtils.getVIntSize(indexTableName.length);
size += rowKeyMetaData.getByteSize();
size += dataEmptyKeyValueCF.length + WritableUtils.getVIntSize(dataEmptyKeyValueCF.length);
size += emptyKeyValueCFPtr.getLength() + WritableUtils.getVIntSize(emptyKeyValueCFPtr.getLength());
size += WritableUtils.getVIntSize(nDataCFs+1);
return size;
}
private int estimateIndexRowKeyByteSize(int indexColByteSize) {
int estimatedIndexRowKeyBytes = indexColByteSize + dataRowKeySchema.getEstimatedValueLength() + (nIndexSaltBuckets == 0 || isLocalIndex || this.isDataTableSalted ? 0 : SaltingUtil.NUM_SALTING_BYTES);
return estimatedIndexRowKeyBytes;
}
/**
* Init calculated state reading/creating
*/
private void initCachedState() {
dataEmptyKeyValueRef =
new ColumnReference(emptyKeyValueCFPtr.copyBytesIfNecessary(),
QueryConstants.EMPTY_COLUMN_BYTES);
indexQualifiers = Lists.newArrayListWithExpectedSize(this.coveredColumns.size());
for (ColumnReference ref : coveredColumns) {
indexQualifiers.add(new ImmutableBytesPtr(IndexUtil.getIndexColumnName(
ref.getFamily(), ref.getQualifier())));
}
this.allColumns = Sets.newLinkedHashSetWithExpectedSize(indexedColumns.size() + coveredColumns.size());
allColumns.addAll(indexedColumns);
allColumns.addAll(coveredColumns);
int dataPkOffset = (isDataTableSalted ? 1 : 0) + (isMultiTenant ? 1 : 0);
int nIndexPkColumns = getIndexPkColumnCount();
dataPkPosition = new int[nIndexPkColumns];
Arrays.fill(dataPkPosition, -1);
int numViewConstantColumns = 0;
BitSet viewConstantColumnBitSet = rowKeyMetaData.getViewConstantColumnBitSet();
for (int i = dataPkOffset; i < dataRowKeySchema.getFieldCount(); i++) {
if (!viewConstantColumnBitSet.get(i)) {
int dataPkPosition = rowKeyMetaData.getIndexPkPosition(i-dataPkOffset);
this.dataPkPosition[dataPkPosition] = i;
} else {
numViewConstantColumns++;
}
}
// Calculate the max number of trailing nulls that we should get rid of after building the index row key.
// We only get rid of nulls for variable length types, so we have to be careful to consider the type of the
// index table, not the data type of the data table
int indexedColumnTypesPos = indexedColumnTypes.size()-1;
int indexPkPos = nIndexPkColumns - numViewConstantColumns - 1;
while (indexPkPos >= 0) {
int dataPkPos = dataPkPosition[indexPkPos];
boolean isDataNullable;
PDataType dataType;
if (dataPkPos == -1) {
isDataNullable = true;
dataType = indexedColumnTypes.get(indexedColumnTypesPos--);
} else {
Field dataField = dataRowKeySchema.getField(dataPkPos);
dataType = dataField.getDataType();
isDataNullable = dataField.isNullable();
}
PDataType indexDataType = IndexUtil.getIndexColumnDataType(isDataNullable, dataType);
if (indexDataType.isFixedWidth()) {
break;
}
indexPkPos--;
}
maxTrailingNulls = nIndexPkColumns-indexPkPos-1;
}
private int getIndexPkColumnCount() {
return dataRowKeySchema.getFieldCount() + indexedColumns.size() - (isDataTableSalted ? 1 : 0) - (isMultiTenant ? 1 : 0);
}
private RowKeyMetaData newRowKeyMetaData() {
return getIndexPkColumnCount() < 0xFF ? new ByteSizeRowKeyMetaData() : new IntSizedRowKeyMetaData();
}
private RowKeyMetaData newRowKeyMetaData(int capacity) {
return capacity < 0xFF ? new ByteSizeRowKeyMetaData(capacity) : new IntSizedRowKeyMetaData(capacity);
}
private static void writeInverted(byte[] buf, int offset, int length, DataOutput output) throws IOException {
for (int i = offset; i < offset + length; i++) {
byte b = SortOrder.invert(buf[i]);
output.write(b);
}
}
private abstract class RowKeyMetaData implements Writable {
private BitSet descIndexColumnBitSet;
private BitSet viewConstantColumnBitSet;
private RowKeyMetaData() {
}
private RowKeyMetaData(int nIndexedColumns) {
descIndexColumnBitSet = BitSet.withCapacity(nIndexedColumns);
viewConstantColumnBitSet = BitSet.withCapacity(dataRowKeySchema.getMaxFields()); // Size based on number of data PK columns
}
protected int getByteSize() {
return BitSet.getByteSize(getIndexPkColumnCount()) * 3 + BitSet.getByteSize(dataRowKeySchema.getMaxFields());
}
protected abstract int getIndexPkPosition(int dataPkPosition);
protected abstract int setIndexPkPosition(int dataPkPosition, int indexPkPosition);
@Override
public void readFields(DataInput input) throws IOException {
int length = getIndexPkColumnCount();
descIndexColumnBitSet = BitSet.read(input, length);
int vclength = dataRowKeySchema.getMaxFields();
viewConstantColumnBitSet = BitSet.read(input, vclength);
}
@Override
public void write(DataOutput output) throws IOException {
int length = getIndexPkColumnCount();
BitSet.write(output, descIndexColumnBitSet, length);
int vclength = dataRowKeySchema.getMaxFields();
BitSet.write(output, viewConstantColumnBitSet, vclength);
}
private BitSet getDescIndexColumnBitSet() {
return descIndexColumnBitSet;
}
private BitSet getViewConstantColumnBitSet() {
return viewConstantColumnBitSet;
}
}
private static int BYTE_OFFSET = 127;
private class ByteSizeRowKeyMetaData extends RowKeyMetaData {
private byte[] indexPkPosition;
private ByteSizeRowKeyMetaData() {
}
private ByteSizeRowKeyMetaData(int nIndexedColumns) {
super(nIndexedColumns);
this.indexPkPosition = new byte[nIndexedColumns];
}
@Override
protected int getIndexPkPosition(int dataPkPosition) {
// Use offset for byte so that we can get full range of 0 - 255
// We use -128 as marker for a non row key index column,
// that's why our offset if 127 instead of 128
return this.indexPkPosition[dataPkPosition] + BYTE_OFFSET;
}
@Override
protected int setIndexPkPosition(int dataPkPosition, int indexPkPosition) {
return this.indexPkPosition[dataPkPosition] = (byte)(indexPkPosition - BYTE_OFFSET);
}
@Override
public void write(DataOutput output) throws IOException {
super.write(output);
output.write(indexPkPosition);
}
@Override
protected int getByteSize() {
return super.getByteSize() + indexPkPosition.length;
}
@Override
public void readFields(DataInput input) throws IOException {
super.readFields(input);
this.indexPkPosition = new byte[getIndexPkColumnCount()];
input.readFully(indexPkPosition);
}
}
private class IntSizedRowKeyMetaData extends RowKeyMetaData {
private int[] indexPkPosition;
private IntSizedRowKeyMetaData() {
}
private IntSizedRowKeyMetaData(int nIndexedColumns) {
super(nIndexedColumns);
this.indexPkPosition = new int[nIndexedColumns];
}
@Override
protected int getIndexPkPosition(int dataPkPosition) {
return this.indexPkPosition[dataPkPosition];
}
@Override
protected int setIndexPkPosition(int dataPkPosition, int indexPkPosition) {
return this.indexPkPosition[dataPkPosition] = indexPkPosition;
}
@Override
public void write(DataOutput output) throws IOException {
super.write(output);
for (int i = 0; i < indexPkPosition.length; i++) {
output.writeInt(indexPkPosition[i]);
}
}
@Override
protected int getByteSize() {
return super.getByteSize() + indexPkPosition.length * Bytes.SIZEOF_INT;
}
@Override
public void readFields(DataInput input) throws IOException {
super.readFields(input);
this.indexPkPosition = new int[getIndexPkColumnCount()];
for (int i = 0; i < indexPkPosition.length; i++) {
indexPkPosition[i] = input.readInt();
}
}
}
@Override
public Iterator<ColumnReference> iterator() {
return allColumns.iterator();
}
public ValueGetter createGetterFromKeyValues(Collection<Cell> pendingUpdates) {
final Map<ReferencingColumn, ImmutableBytesPtr> valueMap = Maps.newHashMapWithExpectedSize(pendingUpdates
.size());
for (Cell kv : pendingUpdates) {
// create new pointers to each part of the kv
ImmutableBytesPtr family = new ImmutableBytesPtr(kv.getRowArray(),kv.getFamilyOffset(),kv.getFamilyLength());
ImmutableBytesPtr qual = new ImmutableBytesPtr(kv.getRowArray(), kv.getQualifierOffset(), kv.getQualifierLength());
ImmutableBytesPtr value = new ImmutableBytesPtr(kv.getValueArray(), kv.getValueOffset(), kv.getValueLength());
valueMap.put(new ReferencingColumn(family, qual), value);
}
return new ValueGetter() {
@Override
public ImmutableBytesPtr getLatestValue(ColumnReference ref) throws IOException {
if(ref.equals(dataEmptyKeyValueRef)) return null;
return valueMap.get(ReferencingColumn.wrap(ref));
}
};
}
}