hello,
with out getting too technical, as a programmer not that difficult to do.............. *memo fields* are often references as BLOB fields an acronym for Binary Large OBjects dBase, which MI is an obfuscated form of, makes use of these along with M$ Excess and others. Internally the field will be a unique temporary filename, possibly a name you can recognize the disk, and most it is compeletly unrecognizable and holds pointers and length values into a single file that holds all the table BLOB data [if you lucky the extension might be *.BLB]. Why BLOB's came about was to get around the 254 character limit in fields, which is based on one byte [0 to 255] hold the actual length. But over time M$ and others have been able to use it to store true binary data like picture formats [bmp,jpg,gif....] and now just about anything you want to put there. Thinking about it, MI's *.MAP file, could be considered a BLOB as each record contains a whole heap if information, the most being for poly-line/regions, with x1/y1....x#/y#, line style, color, etc that is linked from the data record. So if your table has a MEMO/BLOB and you tell MI, in it's lesser intellectual capacity, to write to that table..........get the idea Trey Pattillo [EMAIL PROTECTED] www.wap3.com -97.66532W 27.79902N ----- Original Message ----- From: "Bill & Lorraine Donaldson" <[EMAIL PROTECTED]> To: "Mapinfo-L" <[EMAIL PROTECTED]> Sent: Friday, January 11, 2002 06:29 Subject: MI-L Alter Table and memo fields > > > > In the MapBasic 6.5 Reference Guide (pg. 52) the Alter Table statement makes > the following reference to memo fields: > > "If a MapBasic application issues an Alter Table statement affecting a table > which has memo fields, the memo fields will be lost. No warning will be > displayed." > > What exactly are these "memo fields" that are mentioned? > > Thanks in advance for any enlightment that is provided! > > Bill > > > > _______________________________________________________________________ > List hosting provided by Directions Magazine | www.directionsmag.com | > To unsubscribe, send e-mail to [EMAIL PROTECTED] and > put "unsubscribe MapInfo-L" in the message body. _______________________________________________________________________ List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MapInfo-L" in the message body.
