SIS - Application Programmatic Interface, Reference Manual - ICS ...

SIS-Application Programmatic Interface, Reference Manual
TABLE OF CONTENTS
1 INTRODUCTION 5
2 QUERYING MODELS 5
2.1 Client-server model to access the SIS base 6
2.2 Immediate access the SIS base 6
3 FUNCTIONALITY OF THE QUERY AND UPDATE FUNCTIONS 7
4 NAME STACK 7
5 PROGRAMMATIC SCENARIO 8
6 FUNCTIONS 8
6.1 Query and transaction sessions 8
6.1.1 Creating sessions to interact with a SIS data base 9
6.1.2 Connecting to the database 10
6.1.3 Performing queries and transactions 10
6.1.4 Using the locking mechanism 11
6.2 Set global parameters 11
6.3 Queries 12
6.3.1 Low level queries 12
6.3.2 Simple queries 13
6.3.3 Logical expressions - Object set filtering 18
6.3.3.1 Expressions returning TRUE/FALSE 19
6.3.3.2 Expressions returning an integer value 24
6.3.3.3 Expressions returning a system identifier 24
6.3.3.4 Expressions returning a set identifier 24
6.3.3.5 An Example 27
6.3.4 General recursive queries 27
6.3.5 Conditions on recursive queries 28
6.3.5.1 An Example 28
6.3.6 Special recursive queries 29
6.3.7 Pattern Matching queries 30
6.3.7.1 An Example 31
6.4 Set manipulation functions 31
6.5 Read contents of answer sets 33
6.5.1 Parametric projection 36
6.6 Tuple handling functions 36
6.7 Update Functions 37
6.7.1 Addition Operations 38
6.7.2 Delete Operations 39
August 2002/v2.2.2 -3- ICS-FORTH