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java.lang.Objectorg.apache.hadoop.hbase.regionserver.ScanQueryMatcher
public class ScanQueryMatcher
A query matcher that is specifically designed for the scan case.
| Nested Class Summary | |
|---|---|
static class |
ScanQueryMatcher.MatchCode
match(org.apache.hadoop.hbase.KeyValue) return codes. |
| Field Summary | |
|---|---|
protected ColumnTracker |
columns
Keeps track of columns and versions |
protected DeleteTracker |
deletes
Keeps track of deletes |
protected Filter |
filter
|
protected long |
maxReadPointToTrackVersions
readPoint over which the KVs are unconditionally included |
protected boolean |
retainDeletesInOutput
|
protected byte[] |
row
Row the query is on |
protected KeyValue |
startKey
Key to seek to in memstore and StoreFiles |
protected TimeRange |
tr
|
| Constructor Summary | |
|---|---|
ScanQueryMatcher(Scan scan,
byte[] family,
NavigableSet<byte[]> columns,
long ttl,
KeyValue.KeyComparator rowComparator,
int maxVersions)
|
|
ScanQueryMatcher(Scan scan,
byte[] family,
NavigableSet<byte[]> columns,
long ttl,
KeyValue.KeyComparator rowComparator,
int minVersions,
int maxVersions)
|
|
ScanQueryMatcher(Scan scan,
byte[] family,
NavigableSet<byte[]> columns,
long ttl,
KeyValue.KeyComparator rowComparator,
int minVersions,
int maxVersions,
boolean retainDeletesInOutput,
long readPointToUse)
Constructs a ScanQueryMatcher for a Scan. |
|
| Method Summary | |
|---|---|
KeyValue |
getKeyForNextColumn(KeyValue kv)
|
KeyValue |
getKeyForNextRow(KeyValue kv)
|
KeyValue |
getNextKeyHint(KeyValue kv)
|
KeyValue |
getStartKey()
|
protected boolean |
isDelete(byte type)
|
boolean |
isExactColumnQuery()
|
ScanQueryMatcher.MatchCode |
match(KeyValue kv)
Determines if the caller should do one of several things: - seek/skip to the next row (MatchCode.SEEK_NEXT_ROW) - seek/skip to the next column (MatchCode.SEEK_NEXT_COL) - include the current KeyValue (MatchCode.INCLUDE) - ignore the current KeyValue (MatchCode.SKIP) - got to the next row (MatchCode.DONE) |
boolean |
moreRowsMayExistAfter(KeyValue kv)
|
void |
reset()
|
void |
setRow(byte[] row)
Set current row |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
|---|
protected TimeRange tr
protected Filter filter
protected DeleteTracker deletes
protected boolean retainDeletesInOutput
protected ColumnTracker columns
protected KeyValue startKey
protected byte[] row
protected long maxReadPointToTrackVersions
| Constructor Detail |
|---|
public ScanQueryMatcher(Scan scan,
byte[] family,
NavigableSet<byte[]> columns,
long ttl,
KeyValue.KeyComparator rowComparator,
int minVersions,
int maxVersions,
boolean retainDeletesInOutput,
long readPointToUse)
scan - family - columns - ttl - rowComparator -
public ScanQueryMatcher(Scan scan,
byte[] family,
NavigableSet<byte[]> columns,
long ttl,
KeyValue.KeyComparator rowComparator,
int minVersions,
int maxVersions)
public ScanQueryMatcher(Scan scan,
byte[] family,
NavigableSet<byte[]> columns,
long ttl,
KeyValue.KeyComparator rowComparator,
int maxVersions)
| Method Detail |
|---|
public ScanQueryMatcher.MatchCode match(KeyValue kv)
throws IOException
kv - KeyValue to check
IOException - in case there is an internal consistency problem
caused by a data corruption.public boolean moreRowsMayExistAfter(KeyValue kv)
public void setRow(byte[] row)
row - public void reset()
protected boolean isDelete(byte type)
public KeyValue getStartKey()
public KeyValue getNextKeyHint(KeyValue kv)
public KeyValue getKeyForNextColumn(KeyValue kv)
public KeyValue getKeyForNextRow(KeyValue kv)
public boolean isExactColumnQuery()
|
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