Java Doc for TempTableMerge.java in  » Database-DBMS » Quadcap-Embeddable-Database » com » quadcap » sql » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » Quadcap Embeddable Database » com.quadcap.sql 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   com.quadcap.sql.TempTable
      com.quadcap.sql.TempTableMerge

TempTableMerge
public class TempTableMerge extends TempTable (Code)
A special temp table used to implement UNION and INTERSECT expressions.

The temp table that we build has keys based on the union columns, and the data as 13 bytes:

byte 0: if zero, the rowId refers to a real table row if one, the rowId refers to a temp row
bytes 1-8: the rowId of the union row
bytes 9-12: the duplicate count (from table 1)
bytes 13-16: the duplicate count (from table 2)

author:
   Stan Bailes


Field Summary
final static  intBUFSIZE
    
final static  intfCOUNT
     The byte offset of the two 'count' integers.
final static  intfIS_TEMP
     Byte offset of 'isTemp' byte flag in a data row.
final static  intfROW_ID
    

Constructor Summary
public  TempTableMerge(Session session, Key compare)
    

Method Summary
public  voidaddRows(Session session, Cursor cursor, int side, int[] map)
     Add rows from one side of the {union/merge} operation, building a temporary index on the key.
final  intgetCount(int side)
    
final static  intgetCount(byte[] data, int side)
    
public  byte[]getData(byte[] key)
    

Field Detail
BUFSIZE
final static int BUFSIZE(Code)
Total size of the data buffer in our temp index



fCOUNT
final static int fCOUNT(Code)
The byte offset of the two 'count' integers. in the data row



fIS_TEMP
final static int fIS_TEMP(Code)
Byte offset of 'isTemp' byte flag in a data row.



fROW_ID
final static int fROW_ID(Code)
The byte offset of the (long) row ID in data data row




Constructor Detail
TempTableMerge
public TempTableMerge(Session session, Key compare) throws SQLException, IOException(Code)
Constructor for session and key




Method Detail
addRows
public void addRows(Session session, Cursor cursor, int side, int[] map) throws SQLException, IOException(Code)
Add rows from one side of the {union/merge} operation, building a temporary index on the key.



getCount
final int getCount(int side)(Code)



getCount
final static int getCount(byte[] data, int side)(Code)



getData
public byte[] getData(byte[] key) throws IOException(Code)



Fields inherited from com.quadcap.sql.TempTable
Key compare(Code)(Java Doc)
byte[] data(Code)(Java Doc)
BlockFile file(Code)(Java Doc)
boolean inMemory(Code)(Java Doc)
Btree index(Code)(Java Doc)
long keyCount(Code)(Java Doc)
int[] map(Code)(Java Doc)
int mySerial(Code)(Java Doc)
static int serial(Code)(Java Doc)
Session session(Code)(Java Doc)
BlockFile tempFile(Code)(Java Doc)
final static boolean trace(Code)(Java Doc)

Methods inherited from com.quadcap.sql.TempTable
public int addRows(Cursor cursor) throws SQLException, IOException(Code)(Java Doc)
public BCursor getCursor() throws IOException(Code)(Java Doc)
public void getRow(byte[] rowIdBuf, LazyRow row) throws SQLException, IOException(Code)(Java Doc)
public byte[] makeKey(Row row) throws SQLException(Code)(Java Doc)
public void release() throws IOException(Code)(Java Doc)
public String toString(long rowId)(Code)(Java Doc)

Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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