KSAM/3000 Reference Manual: HP 3000 MPE/iX Computer Systems

List of Figures

1-1 A Simplified View of the KSAM File Structure

2-1 EDITOR Listing of Job to be Streamed

3-1 Filetable Structure

3-2 Representation of KSAMFILE Used in COBOL Examples

3-3 Sequential Write Using COBOL

3-4 Sequential Read Using COBOL

3-5 Random Update with COBOL

4-1 FCLOSE Example

4-2 FFINDBYKEY Example

4-3 File Position with FFINDN

4-4 FGETINFO Example

4-5 FOPEN Example — Building a KSAM file

4-6 FOPEN Example — Opening an Existing File

4-7 FREAD Example

4-8 FREADBYKEY Example

4-9 FREADC Example

4-10 FREADDIR Example

4-11 FREMOVE Example

4-12 File Position with FSPACE

4-13 FUPDATE Example

4-14 FWRITE Example

5-1 Creating and Writing to KSAM File in FORTRAN

5-2 Opening KSAM File with CKOPEN

5-3 Reading KSAM File in Key Sequence Using FORTRAN

5-4 Reading KSAM File in Chronological Sequence Using FORTRAN

6-1 Closing a KSAM File with BKCLOSE

6-2 Deleting a Record With BKDELETE

6-3 Dynamically Locking a KSAM File with BKLOCK

6-4 Opening KSAM File with BKOPEN

6-5 Reading From a KSAM File with BKREAD

6-6 Reading a Record Located by Key Value with BKREADBYKEY

6-7 Rewriting Record in KSAM File with BKREWRITE

6-8 Positioning Pointer to Least-Valued Record with BKSTART

6-9 Positioning Pointer to Particular Record with BKSTART

6-10 Dynamically Unlocking a KSAM File

6-11 Writing to a KSAM File with BKWRITE

B-1 Two-Level B-Tree Structure

B-2 Split Causes New Level in Tree

B-3 Tree Growth from Two to Three Levels

B-4 KSAM Key File Structure With Two Keys

B-5 Control Block and Key Descriptor Block

B-6 Key Entry Block Structure

B-7 Data File/Key File Relation

B-8 Formula to Determine File Space per Key

B-9 Calculation of Total Key File Size with Two Keys

B-10 Extra Data Segments for Shared Access

B-11 KSAM Extra Data Segment

E-1 KSAM File and an Extra Data Segment

F-1 KSAM File Test Program

F-2 Results Returned By The NLKEYCOMPARE Intrinsic

F-3 Generic Key Searches

F-4 KSAM Recovery Procedure