/*
* 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.schema;
import static org.apache.phoenix.query.QueryConstants.SEPARATOR_BYTE;
import static org.apache.phoenix.schema.SaltingUtil.SALTING_COLUMN;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.Mutation;
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.WritableUtils;
import com.google.common.base.Objects;
import com.google.common.collect.ArrayListMultimap;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSortedMap;
import com.google.common.collect.ListMultimap;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import org.apache.phoenix.index.IndexMaintainer;
import org.apache.phoenix.query.QueryConstants;
import org.apache.phoenix.schema.RowKeySchema.RowKeySchemaBuilder;
import org.apache.phoenix.schema.stat.PTableStats;
import org.apache.phoenix.schema.stat.PTableStatsImpl;
import org.apache.phoenix.util.ByteUtil;
import org.apache.phoenix.util.SchemaUtil;
import org.apache.phoenix.util.StringUtil;
import org.apache.phoenix.util.TrustedByteArrayOutputStream;
/**
*
* Base class for PTable implementors. Provides abstraction for
* storing data in a single column (ColumnLayout.SINGLE) or in
* multiple columns (ColumnLayout.MULTI).
*
*
* @since 0.1
*/
public class PTableImpl implements PTable {
private static final Integer NO_SALTING = -1;
private PName name;
private PName schemaName;
private PName tableName;
private PTableType type;
private PIndexState state;
private long sequenceNumber;
private long timeStamp;
// Have MultiMap for String->PColumn (may need family qualifier)
private List<PColumn> pkColumns;
private List<PColumn> allColumns;
private List<PColumnFamily> families;
private Map<byte[], PColumnFamily> familyByBytes;
private Map<String, PColumnFamily> familyByString;
private ListMultimap<String,PColumn> columnsByName;
private PName pkName;
private Integer bucketNum;
// Statistics associated with this table.
private PTableStats stats;
private RowKeySchema rowKeySchema;
// Indexes associated with this table.
private List<PTable> indexes;
// Data table name that the index is created on.
private PName parentName;
private PName parentTableName;
private boolean isImmutableRows;
private IndexMaintainer indexMaintainer;
private ImmutableBytesWritable indexMaintainersPtr;
public PTableImpl() {
}
public PTableImpl(PName name) { // For finding table ref
this.name = name;
}
public PTableImpl(long timeStamp) { // For delete marker
this(timeStamp, false);
}
public PTableImpl(long timeStamp, boolean isIndex) { // For index delete marker
if (isIndex) {
this.type = PTableType.INDEX;
this.state = PIndexState.INACTIVE;
} else {
this.type = PTableType.USER;
}
this.timeStamp = timeStamp;
this.pkColumns = this.allColumns = Collections.emptyList();
this.families = Collections.emptyList();
this.familyByBytes = Collections.emptyMap();
this.familyByString = Collections.emptyMap();
this.rowKeySchema = RowKeySchema.EMPTY_SCHEMA;
this.indexes = Collections.emptyList();
}
// When cloning table, ignore the salt column as it will be added back in the constructor
public static List<PColumn> getColumnsToClone(PTable table) {
return table.getBucketNum() == null ? table.getColumns() : table.getColumns().subList(1, table.getColumns().size());
}
public static PTableImpl makePTable(PTable table, long timeStamp, List<PTable> indexes) throws SQLException {
return new PTableImpl(
table.getSchemaName(), table.getTableName(), table.getType(), table.getIndexState(), timeStamp, table.getSequenceNumber() + 1,
table.getPKName(), table.getBucketNum(), getColumnsToClone(table), table.getParentTableName(), indexes, table.isImmutableRows());
}
public static PTableImpl makePTable(PTable table, List<PColumn> columns) throws SQLException {
return new PTableImpl(
table.getSchemaName(), table.getTableName(), table.getType(), table.getIndexState(), table.getTimeStamp(), table.getSequenceNumber(),
table.getPKName(), table.getBucketNum(), columns, table.getParentTableName(), table.getIndexes(), table.isImmutableRows());
}
public static PTableImpl makePTable(PTable table, long timeStamp, long sequenceNumber, List<PColumn> columns) throws SQLException {
return new PTableImpl(
table.getSchemaName(), table.getTableName(), table.getType(), table.getIndexState(), timeStamp, sequenceNumber,
table.getPKName(), table.getBucketNum(), columns, table.getParentTableName(), table.getIndexes(), table.isImmutableRows());
}
public static PTableImpl makePTable(PTable table, long timeStamp, long sequenceNumber, List<PColumn> columns, boolean isImmutableRows) throws SQLException {
return new PTableImpl(
table.getSchemaName(), table.getTableName(), table.getType(), table.getIndexState(), timeStamp, sequenceNumber,
table.getPKName(), table.getBucketNum(), columns, table.getParentTableName(), table.getIndexes(), isImmutableRows);
}
public static PTableImpl makePTable(PTable table, PIndexState state) throws SQLException {
return new PTableImpl(
table.getSchemaName(), table.getTableName(), table.getType(), state, table.getTimeStamp(), table.getSequenceNumber(),
table.getPKName(), table.getBucketNum(), getColumnsToClone(table), table.getParentTableName(), table.getIndexes(), table.isImmutableRows());
}
public static PTableImpl makePTable(PName schemaName, PName tableName, PTableType type, PIndexState state, long timeStamp, long sequenceNumber, PName pkName,
Integer bucketNum, List<PColumn> columns, PName dataTableName, List<PTable> indexes, boolean isImmutableRows) throws SQLException {
return new PTableImpl(schemaName, tableName, type, state, timeStamp, sequenceNumber, pkName, bucketNum, columns, dataTableName, indexes, isImmutableRows);
}
private PTableImpl(PName schemaName, PName tableName, PTableType type, PIndexState state, long timeStamp, long sequenceNumber, PName pkName,
Integer bucketNum, List<PColumn> columns, PName dataTableName, List<PTable> indexes, boolean isImmutableRows) throws SQLException {
init(schemaName, tableName, type, state, timeStamp, sequenceNumber, pkName, bucketNum, columns, new PTableStatsImpl(),
dataTableName, indexes, isImmutableRows);
}
private void init(PName schemaName, PName tableName, PTableType type, PIndexState state, long timeStamp, long sequenceNumber, PName pkName,
Integer bucketNum, List<PColumn> columns, PTableStats stats, PName parentTableName, List<PTable> indexes, boolean isImmutableRows) throws SQLException {
this.schemaName = schemaName;
this.tableName = tableName;
this.name = PNameFactory.newName(SchemaUtil.getTableName(schemaName.getString(), tableName.getString()));
this.type = type;
this.state = state;
this.timeStamp = timeStamp;
this.sequenceNumber = sequenceNumber;
this.pkName = pkName;
this.isImmutableRows = isImmutableRows;
List<PColumn> pkColumns;
PColumn[] allColumns;
this.columnsByName = ArrayListMultimap.create(columns.size(), 1);
if (bucketNum != null) {
// Add salt column to allColumns and pkColumns, but don't add to
// columnsByName, since it should not be addressable via name.
allColumns = new PColumn[columns.size()+1];
allColumns[SALTING_COLUMN.getPosition()] = SALTING_COLUMN;
pkColumns = Lists.newArrayListWithExpectedSize(columns.size()+1);
pkColumns.add(SALTING_COLUMN);
} else {
allColumns = new PColumn[columns.size()];
pkColumns = Lists.newArrayListWithExpectedSize(columns.size());
}
for (int i = 0; i < columns.size(); i++) {
PColumn column = columns.get(i);
allColumns[column.getPosition()] = column;
PName familyName = column.getFamilyName();
if (familyName == null) {
pkColumns.add(column);
}
String columnName = column.getName().getString();
if (columnsByName.put(columnName, column)) {
int count = 0;
for (PColumn dupColumn : columnsByName.get(columnName)) {
if (Objects.equal(familyName, dupColumn.getFamilyName())) {
count++;
if (count > 1) {
throw new ColumnAlreadyExistsException(null, name.getString(), columnName);
}
}
}
}
}
this.bucketNum = bucketNum;
this.pkColumns = ImmutableList.copyOf(pkColumns);
this.allColumns = ImmutableList.copyOf(allColumns);
RowKeySchemaBuilder builder = new RowKeySchemaBuilder(pkColumns.size());
// Two pass so that column order in column families matches overall column order
// and to ensure that column family order is constant
int maxExpectedSize = allColumns.length - pkColumns.size();
// Maintain iteration order so that column families are ordered as they are listed
Map<PName, List<PColumn>> familyMap = Maps.newLinkedHashMap();
for (PColumn column : allColumns) {
PName familyName = column.getFamilyName();
if (familyName == null) {
builder.addField(column, column.isNullable(), column.getColumnModifier());
} else {
List<PColumn> columnsInFamily = familyMap.get(familyName);
if (columnsInFamily == null) {
columnsInFamily = Lists.newArrayListWithExpectedSize(maxExpectedSize);
familyMap.put(familyName, columnsInFamily);
}
columnsInFamily.add(column);
}
}
this.rowKeySchema = builder.build();
Iterator<Map.Entry<PName,List<PColumn>>> iterator = familyMap.entrySet().iterator();
PColumnFamily[] families = new PColumnFamily[familyMap.size()];
ImmutableMap.Builder<String, PColumnFamily> familyByString = ImmutableMap.builder();
ImmutableSortedMap.Builder<byte[], PColumnFamily> familyByBytes = ImmutableSortedMap.orderedBy(Bytes.BYTES_COMPARATOR);
for (int i = 0; i < families.length; i++) {
Map.Entry<PName,List<PColumn>> entry = iterator.next();
PColumnFamily family = new PColumnFamilyImpl(entry.getKey(), entry.getValue());
families[i] = family;
familyByString.put(family.getName().getString(), family);
familyByBytes.put(family.getName().getBytes(), family);
}
this.families = ImmutableList.copyOf(families);
this.familyByBytes = familyByBytes.build();
this.familyByString = familyByString.build();
this.stats = stats;
this.indexes = indexes;
this.parentTableName = parentTableName;
this.parentName = parentTableName == null ? null : PNameFactory.newName(SchemaUtil.getTableName(schemaName.getString(), parentTableName.getString()));
}
@Override
public boolean isImmutableRows() {
return isImmutableRows;
}
@Override
public String toString() {
return name.getString();
}
@Override
public List<PColumn> getPKColumns() {
return pkColumns;
}
@Override
public final PName getName() {
return name;
}
@Override
public final PName getSchemaName() {
return schemaName;
}
@Override
public final PName getTableName() {
return tableName;
}
@Override
public final PTableType getType() {
return type;
}
@Override
public final List<PColumnFamily> getColumnFamilies() {
return families;
}
@Override
public int newKey(ImmutableBytesWritable key, byte[][] values) {
int nValues = values.length;
while (nValues > 0 && (values[nValues-1] == null || values[nValues-1].length == 0)) {
nValues--;
}
int i = 0;
TrustedByteArrayOutputStream os = new TrustedByteArrayOutputStream(SchemaUtil.estimateKeyLength(this));
try {
Integer bucketNum = this.getBucketNum();
if (bucketNum != null) {
// Write place holder for salt byte
i++;
os.write(QueryConstants.SEPARATOR_BYTE_ARRAY);
}
List<PColumn> columns = getPKColumns();
int nColumns = columns.size();
PDataType type = null;
while (i < nValues && i < nColumns) {
// Separate variable length column values in key with zero byte
if (type != null && !type.isFixedWidth()) {
os.write(SEPARATOR_BYTE);
}
PColumn column = columns.get(i);
type = column.getDataType();
// This will throw if the value is null and the type doesn't allow null
byte[] byteValue = values[i++];
if (byteValue == null) {
byteValue = ByteUtil.EMPTY_BYTE_ARRAY;
}
// An empty byte array return value means null. Do this,
// since a type may have muliple representations of null.
// For example, VARCHAR treats both null and an empty string
// as null. This way we don't need to leak that part of the
// implementation outside of PDataType by checking the value
// here.
if (byteValue.length == 0 && !column.isNullable()) {
throw new ConstraintViolationException(name.getString() + "." + column.getName().getString() + " may not be null");
}
Integer byteSize = column.getByteSize();
if (type.isFixedWidth() && byteValue.length <= byteSize) {
byteValue = StringUtil.padChar(byteValue, byteSize);
} else if (byteSize != null && byteValue.length > byteSize) {
throw new ConstraintViolationException(name.getString() + "." + column.getName().getString() + " may not exceed " + byteSize + " bytes (" + SchemaUtil.toString(type, byteValue) + ")");
}
os.write(byteValue, 0, byteValue.length);
}
// If some non null pk values aren't set, then throw
if (i < nColumns) {
PColumn column = columns.get(i);
type = column.getDataType();
if (type.isFixedWidth() || !column.isNullable()) {
throw new ConstraintViolationException(name.getString() + "." + column.getName().getString() + " may not be null");
}
}
byte[] buf = os.getBuffer();
int size = os.size();
if (bucketNum != null) {
buf[0] = SaltingUtil.getSaltingByte(buf, 1, size-1, bucketNum);
}
key.set(buf,0,size);
return i;
} finally {
try {
os.close();
} catch (IOException e) {
throw new RuntimeException(e); // Impossible
}
}
}
private PRow newRow(long ts, ImmutableBytesWritable key, int i, byte[]... values) {
PRow row = new PRowImpl(key, ts, getBucketNum());
if (i < values.length) {
for (PColumnFamily family : getColumnFamilies()) {
for (PColumn column : family.getColumns()) {
row.setValue(column, values[i++]);
if (i == values.length)
return row;
}
}
}
return row;
}
@Override
public PRow newRow(long ts, ImmutableBytesWritable key, byte[]... values) {
return newRow(ts, key, 0, values);
}
@Override
public PRow newRow(ImmutableBytesWritable key, byte[]... values) {
return newRow(HConstants.LATEST_TIMESTAMP, key, values);
}
@Override
public PColumn getColumn(String name) throws ColumnNotFoundException, AmbiguousColumnException {
List<PColumn> columns = columnsByName.get(name);
int size = columns.size();
if (size == 0) {
throw new ColumnNotFoundException(name);
}
if (size > 1) {
for (PColumn column : columns) {
if (QueryConstants.DEFAULT_COLUMN_FAMILY.equals(column.getFamilyName().getString())) {
// Allow ambiguity with default column, since a user would not know how to prefix it.
return column;
}
}
throw new AmbiguousColumnException(name);
}
return columns.get(0);
}
/**
*
* PRow implementation for ColumnLayout.MULTI mode which stores column
* values across multiple hbase columns.
*
*
* @since 0.1
*/
private class PRowImpl implements PRow {
private final byte[] key;
private Put setValues;
private Delete unsetValues;
private Delete deleteRow;
private final long ts;
public PRowImpl(ImmutableBytesWritable key, long ts, Integer bucketNum) {
this.ts = ts;
if (bucketNum != null) {
this.key = SaltingUtil.getSaltedKey(key, bucketNum);
} else {
this.key = ByteUtil.copyKeyBytesIfNecessary(key);
}
newMutations();
}
@SuppressWarnings("deprecation")
private void newMutations() {
this.setValues = new Put(this.key);
this.unsetValues = new Delete(this.key);
// No need to write to the WAL for indexes
if (PTableImpl.this.getType() == PTableType.INDEX) {
this.setValues.setWriteToWAL(false);
this.unsetValues.setWriteToWAL(false);
}
}
@Override
public List<Mutation> toRowMutations() {
List<Mutation> mutations = new ArrayList<Mutation>(3);
if (deleteRow != null) {
// Include only deleteRow mutation if present because it takes precedence over all others
mutations.add(deleteRow);
} else {
// Because we cannot enforce a not null constraint on a KV column (since we don't know if the row exists when
// we upsert it), se instead add a KV that is always emtpy. This allows us to imitate SQL semantics given the
// way HBase works.
setValues.add(SchemaUtil.getEmptyColumnFamily(getColumnFamilies()), QueryConstants.EMPTY_COLUMN_BYTES, ts, ByteUtil.EMPTY_BYTE_ARRAY);
mutations.add(setValues);
if (!unsetValues.isEmpty()) {
mutations.add(unsetValues);
}
}
return mutations;
}
private void removeIfPresent(Mutation m, byte[] family, byte[] qualifier) {
Map<byte[],List<KeyValue>> familyMap = m.getFamilyMap();
List<KeyValue> kvs = familyMap.get(family);
if (kvs != null) {
Iterator<KeyValue> iterator = kvs.iterator();
while (iterator.hasNext()) {
KeyValue kv = iterator.next();
if (Bytes.compareTo(kv.getQualifier(), qualifier) == 0) {
iterator.remove();
}
}
}
}
@Override
public void setValue(PColumn column, Object value) {
byte[] byteValue = value == null ? ByteUtil.EMPTY_BYTE_ARRAY : column.getDataType().toBytes(value);
setValue(column, byteValue);
}
@Override
public void setValue(PColumn column, byte[] byteValue) {
deleteRow = null;
byte[] family = column.getFamilyName().getBytes();
byte[] qualifier = column.getName().getBytes();
PDataType type = column.getDataType();
// Check null, since some types have no byte representation for null
if (byteValue == null || byteValue.length == 0) {
if (!column.isNullable()) {
throw new ConstraintViolationException(name.getString() + "." + column.getName().getString() + " may not be null");
}
removeIfPresent(setValues, family, qualifier);
unsetValues.deleteColumns(family, qualifier, ts);
} else {
Integer byteSize = column.getByteSize();
if (type.isFixedWidth() && byteValue.length <= byteSize) {
byteValue = StringUtil.padChar(byteValue, byteSize);
} else if (byteSize != null && byteValue.length > byteSize) {
throw new ConstraintViolationException(name.getString() + "." + column.getName().getString() + " may not exceed " + byteSize + " bytes (" + type.toObject(byteValue) + ")");
}
removeIfPresent(unsetValues, family, qualifier);
setValues.add(family, qualifier, ts, byteValue);
}
}
@SuppressWarnings("deprecation")
@Override
public void delete() {
newMutations();
// FIXME: the version of the Delete constructor without the lock args was introduced
// in 0.94.4, thus if we try to use it here we can no longer use the 0.94.2 version
// of the client.
Delete delete = new Delete(key,ts,null);
deleteRow = delete;
// No need to write to the WAL for indexes
if (PTableImpl.this.getType() == PTableType.INDEX) {
deleteRow.setWriteToWAL(false);
}
}
}
@Override
public PColumnFamily getColumnFamily(String familyName) throws ColumnFamilyNotFoundException {
PColumnFamily family = familyByString.get(familyName);
if (family == null) {
throw new ColumnFamilyNotFoundException(familyName);
}
return family;
}
@Override
public PColumnFamily getColumnFamily(byte[] familyBytes) throws ColumnFamilyNotFoundException {
PColumnFamily family = familyByBytes.get(familyBytes);
if (family == null) {
String familyName = Bytes.toString(familyBytes);
throw new ColumnFamilyNotFoundException(familyName);
}
return family;
}
@Override
public List<PColumn> getColumns() {
return allColumns;
}
@Override
public long getSequenceNumber() {
return sequenceNumber;
}
@Override
public long getTimeStamp() {
return timeStamp;
}
@Override
public PTableStats getTableStats() {
return stats;
}
@Override
public void readFields(DataInput input) throws IOException {
byte[] schemaNameBytes = Bytes.readByteArray(input);
byte[] tableNameBytes = Bytes.readByteArray(input);
PName schemaName = PNameFactory.newName(schemaNameBytes);
PName tableName = PNameFactory.newName(tableNameBytes);
PTableType tableType = PTableType.values()[WritableUtils.readVInt(input)];
PIndexState indexState = null;
if (tableType == PTableType.INDEX) {
int ordinal = WritableUtils.readVInt(input);
if (ordinal >= 0) {
indexState = PIndexState.values()[ordinal];
}
}
long sequenceNumber = WritableUtils.readVLong(input);
long timeStamp = input.readLong();
byte[] pkNameBytes = Bytes.readByteArray(input);
PName pkName = pkNameBytes.length == 0 ? null : PNameFactory.newName(pkNameBytes);
Integer bucketNum = WritableUtils.readVInt(input);
int nColumns = WritableUtils.readVInt(input);
List<PColumn> columns = Lists.newArrayListWithExpectedSize(nColumns);
for (int i = 0; i < nColumns; i++) {
PColumn column = new PColumnImpl();
column.readFields(input);
columns.add(column);
}
int nIndexes = WritableUtils.readVInt(input);
List<PTable> indexes = Lists.newArrayListWithExpectedSize(nIndexes);
for (int i = 0; i < nIndexes; i++) {
PTable index = new PTableImpl();
index.readFields(input);
indexes.add(index);
}
boolean isImmutableRows = input.readBoolean();
Map<String, byte[][]> guidePosts = new HashMap<String, byte[][]>();
int size = WritableUtils.readVInt(input);
for (int i=0; i<size; i++) {
String key = WritableUtils.readString(input);
int valueSize = WritableUtils.readVInt(input);
byte[][] value = new byte[valueSize][];
for (int j=0; j<valueSize; j++) {
value[j] = Bytes.readByteArray(input);
}
guidePosts.put(key, value);
}
byte[] dataTableNameBytes = Bytes.readByteArray(input);
PName dataTableName = dataTableNameBytes.length == 0 ? null : PNameFactory.newName(dataTableNameBytes);
PTableStats stats = new PTableStatsImpl(guidePosts);
try {
init(schemaName, tableName, tableType, indexState, timeStamp, sequenceNumber, pkName,
bucketNum.equals(NO_SALTING) ? null : bucketNum, columns, stats, dataTableName, indexes, isImmutableRows);
} catch (SQLException e) {
throw new RuntimeException(e); // Impossible
}
}
@Override
public void write(DataOutput output) throws IOException {
Bytes.writeByteArray(output, schemaName.getBytes());
Bytes.writeByteArray(output, tableName.getBytes());
WritableUtils.writeVInt(output, type.ordinal());
if (type == PTableType.INDEX) {
WritableUtils.writeVInt(output, state == null ? -1 : state.ordinal());
}
WritableUtils.writeVLong(output, sequenceNumber);
output.writeLong(timeStamp);
Bytes.writeByteArray(output, pkName == null ? ByteUtil.EMPTY_BYTE_ARRAY : pkName.getBytes());
int offset = 0, nColumns = allColumns.size();
if (bucketNum == null) {
WritableUtils.writeVInt(output, NO_SALTING);
} else {
offset = 1;
nColumns--;
WritableUtils.writeVInt(output, bucketNum);
}
WritableUtils.writeVInt(output, nColumns);
for (int i = offset; i < allColumns.size(); i++) {
PColumn column = allColumns.get(i);
column.write(output);
}
WritableUtils.writeVInt(output, indexes.size());
for (PTable index: indexes) {
index.write(output);
}
output.writeBoolean(isImmutableRows);
stats.write(output);
Bytes.writeByteArray(output, parentTableName == null ? ByteUtil.EMPTY_BYTE_ARRAY : parentTableName.getBytes());
}
@Override
public PColumn getPKColumn(String name) throws ColumnNotFoundException {
List<PColumn> columns = columnsByName.get(name);
int size = columns.size();
if (size == 0) {
throw new ColumnNotFoundException(name);
}
if (size > 1) {
do {
PColumn column = columns.get(--size);
if (column.getFamilyName() == null) {
return column;
}
} while (size > 0);
throw new ColumnNotFoundException(name);
}
return columns.get(0);
}
@Override
public PName getPKName() {
return pkName;
}
@Override
public RowKeySchema getRowKeySchema() {
return rowKeySchema;
}
@Override
public Integer getBucketNum() {
return bucketNum;
}
@Override
public List<PTable> getIndexes() {
return indexes;
}
@Override
public PIndexState getIndexState() {
return state;
}
@Override
public PName getParentTableName() {
return parentTableName;
}
@Override
public PName getParentName() {
return parentName;
}
@Override
public synchronized IndexMaintainer getIndexMaintainer(PTable dataTable) {
if (indexMaintainer == null) {
indexMaintainer = IndexMaintainer.create(dataTable, this);
}
return indexMaintainer;
}
@Override
public synchronized void getIndexMaintainers(ImmutableBytesWritable ptr) {
if (indexMaintainersPtr == null) {
indexMaintainersPtr = new ImmutableBytesWritable();
if (indexes.isEmpty()) {
indexMaintainersPtr.set(ByteUtil.EMPTY_BYTE_ARRAY);
} else {
IndexMaintainer.serialize(this, indexMaintainersPtr);
}
}
ptr.set(indexMaintainersPtr.get(), indexMaintainersPtr.getOffset(), indexMaintainersPtr.getLength());
}
}