org.apache.hadoop.hbase.regionserver.querymatcher

类 UserScanQueryMatcher

java.lang.Object

org.apache.hadoop.hbase.regionserver.querymatcher.ScanQueryMatcher

org.apache.hadoop.hbase.regionserver.querymatcher.UserScanQueryMatcher

所有已实现的接口:

ShipperListener

直接已知子类:

NormalUserScanQueryMatcher, RawScanQueryMatcher

@InterfaceAudience.Private
public abstract class UserScanQueryMatcher
extends ScanQueryMatcher

Query matcher for user scan.

We do not consider mvcc here because StoreFileScanner and SegmentScanner will only return a cell whose mvcc is less than or equal to given read point. For IsolationLevel.READ_UNCOMMITTED, we just set the read point to Long.MAX_VALUE, i.e. still do not need to consider it.

嵌套类概要

从类继承的嵌套类/接口 org.apache.hadoop.hbase.regionserver.querymatcher.ScanQueryMatcher

ScanQueryMatcher.MatchCode

字段概要

字段

限定符和类型	字段和说明
protected Filter	filter
protected boolean	hasNullColumn
protected byte[]	stopRow
protected TimeRange	tr

从类继承的字段 org.apache.hadoop.hbase.regionserver.querymatcher.ScanQueryMatcher

columns, currentRow, now, oldestUnexpiredTS, rowComparator, startKey

构造器概要

构造器

限定符	构造器和说明
protected	UserScanQueryMatcher(Scan scan, ScanInfo scanInfo, ColumnTracker columns, boolean hasNullColumn, long oldestUnexpiredTS, long now)

方法概要

限定符和类型	方法和说明
void	beforeShipped() The action that needs to be performed before Shipper.shipped() is performed
static UserScanQueryMatcher	create(Scan scan, ScanInfo scanInfo, NavigableSet<byte[]> columns, long oldestUnexpiredTS, long now, RegionCoprocessorHost regionCoprocessorHost)
Filter	getFilter()
Cell	getNextKeyHint(Cell cell) Delegate to Filter.getNextCellHint(Cell).
boolean	hasNullColumnInQuery()
protected abstract boolean	isGet()
boolean	isUserScan()
protected ScanQueryMatcher.MatchCode	matchColumn(Cell cell, long timestamp, byte typeByte)
boolean	moreRowsMayExistAfter(Cell cell)
protected abstract boolean	moreRowsMayExistsAfter(int cmpToStopRow)

从类继承的方法 org.apache.hadoop.hbase.regionserver.querymatcher.ScanQueryMatcher

checkDeleted, clearCurrentRow, compareKeyForNextColumn, compareKeyForNextRow, createStartKeyFromRow, currentRow, getKeyForNextColumn, getStartKey, getTrackers, match, preCheck, reset, setToNewRow

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

hasNullColumn

protected final boolean hasNullColumn

filter

protected final Filter filter

stopRow

protected final byte[] stopRow

tr

protected final TimeRange tr

构造器详细资料

UserScanQueryMatcher

protected UserScanQueryMatcher(Scan scan,
                               ScanInfo scanInfo,
                               ColumnTracker columns,
                               boolean hasNullColumn,
                               long oldestUnexpiredTS,
                               long now)

方法详细资料

hasNullColumnInQuery

public boolean hasNullColumnInQuery()

指定者:

hasNullColumnInQuery 在类中 ScanQueryMatcher

返回:

whether there is an null column in the query

isUserScan

public boolean isUserScan()

指定者:

isUserScan 在类中 ScanQueryMatcher

getFilter

public Filter getFilter()

指定者:

getFilter 在类中 ScanQueryMatcher

返回:

the Filter

getNextKeyHint

public Cell getNextKeyHint(Cell cell)
                    throws IOException

从类复制的说明: ScanQueryMatcher

Delegate to Filter.getNextCellHint(Cell). If no filter, return null.

指定者:

getNextKeyHint 在类中 ScanQueryMatcher

抛出:

IOException

beforeShipped

public void beforeShipped()
                   throws IOException

从接口复制的说明: ShipperListener

The action that needs to be performed before Shipper.shipped() is performed

指定者:

beforeShipped 在接口中 ShipperListener

覆盖:

beforeShipped 在类中 ScanQueryMatcher

抛出:

IOException

matchColumn

protected final ScanQueryMatcher.MatchCode matchColumn(Cell cell,
                                                       long timestamp,
                                                       byte typeByte)
                                                throws IOException

抛出:

IOException

isGet

protected abstract boolean isGet()

moreRowsMayExistsAfter

protected abstract boolean moreRowsMayExistsAfter(int cmpToStopRow)

moreRowsMayExistAfter

public boolean moreRowsMayExistAfter(Cell cell)

指定者:

moreRowsMayExistAfter 在类中 ScanQueryMatcher

返回:

Returns false if we know there are no more rows to be scanned (We've reached the stopRow or we are scanning on row only because this Scan is for a Get, etc.

create

public static UserScanQueryMatcher create(Scan scan,
                                          ScanInfo scanInfo,
                                          NavigableSet<byte[]> columns,
                                          long oldestUnexpiredTS,
                                          long now,
                                          RegionCoprocessorHost regionCoprocessorHost)
                                   throws IOException

抛出:

IOException