FATS - Fast Access Tree System Table of Contents List of Commands "E" Search Previous Before

"E" Search Previous Before

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Command string:

CMND$ = "E\{KeyNo}\{RecNo}\{FileNo}\{KeyString}"

KeyNo	Key number
RecNo	Record number
FileNo	File number
KeyString	Key value

Purpose:

Gets the key value and record number of the data record whose key value is less than the requested key value.

Description:

With this command your application can retrieve the record number corresponding to the first key value which is less than the key value you specify.
If a duplicate key exists, the next lower record number of the previous duplicate will be returned.
The key value you specify with "KeyString" don´t have to be a valid key in the index file

Unlike the "Search Previous" command, this command can be used in a network environment.

Parameters returned:

ERRORCODE:	Errorcode or 0 (no error)
RECNO:	Record number
FATSKEY:	Key value (or KEYADR=address of key)

Example:

CMND$ = "E\1\"+STR$(RECNO)+"\1\"+KEYSTRING$

 BASIC Example
 Pascal Example
 C Example

See also:

 "P" Search Previous; page 4-77

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