/*     */ public class Packet
/*     */   implements SQLnetDef
/*     */ {
/*     */   private int buffer2send;
/*     */   protected int sdu;
/*     */   protected int tdu;
/*     */   protected int length;
/*     */   public int type;
/*     */   protected int flags;
/*     */   protected int dataLen;
/*     */   protected int dataOff;
/*     */   protected String data;
/*     */   protected byte[] buffer;
/* 112 */   protected int leftOverFromPreviousRead = 0;
/*     */   
/*     */ 



Packet class, size is SDU


DataPacket



netinputstream on top (same as MAPI block stream essentially)


packets on top again ?!?



unmarshalOneRow


rowSpaceIndicator points to beginning of row in result set?


rowSpaceIndicator = pointer into row buffer

fields: known lengths or strings with char >> 1 leng prefix




/* 1032 */         lenoffset = columnIndex + charLength * currentRow;



/* 1033 */         int len = rowSpaceChar[lenoffset] >> '\001';
/*      */         
/* 1035 */         if (len > internalTypeMaxLength) {
/* 1036 */           len = internalTypeMaxLength;
/*      */         }
/* 1038 */         result = new String(rowSpaceChar, lenoffset + 1, len);


16 bit -> 15 bit string length







/*  252 */       if (rowSpaceIndicator[(indicatorIndex + currentRow)] != -1)
/*      */       {
/*  254 */         off = columnIndex + byteLength * currentRow;
/*  255 */         int year = oracleYear(off);
/*      */         
/*  257 */         Calendar cal2 = (Calendar)cal.clone();
/*      */         
/*  259 */         cal2.set(year, oracleMonth(off), oracleDay(off), 0, 0, 0);
/*  260 */         cal2.set(14, 0);
/*      */         
/*      */ 
/*      */ 
/*  264 */         if ((year > 0) && (cal2.isSet(0))) {
/*  265 */           cal2.set(0, 1);
/*      */         }
/*  267 */         result = new Date(cal2.getTimeInMillis());
/*      */       }
/*      */       
/*      */ 



NumberCommonAccessor interesting binary





oracle.jdbc.driver.T4CCharAccessor.unmarshalOneRow()



int32, char(10);

42, 'DPFKG'
100 00 00 00 OK




https://dev.mysql.com/doc/internals/en/binary-protocol-resultset-row.html

https://github.com/siddontang/go-mysql/blob/master/Godeps/_workspace/src/github.com/go-sql-driver/mysql/packets.go

https://dev.mysql.com/doc/internals/en/integer.html#length-encoded-integer


[ 6899,	"systemfunctions"	]
[ 6899,	"systemfunctions"	]