IMS DB – SSA SSA stands for Segment Search Arguments. SSA is used to identify the segment occurrence being accessed. It is an optional parameter. We can include any number of SSAs depending on the requirement. There are two types of SSAs − Unqualified SSA Qualified SSA Unqualified SSA An unqualified SSA provides the name […]
Category Archives: ims Db
IMS DB – Data Retrieval The various data retrieval methods used in IMS DL/I calls are as follows − GU Call GN Call Using Command Codes Multiple Processing Let us consider the following IMS database structure to understand the data retrieval function calls − GU Call The fundamentals of GU call are as follows − […]
IMS DB – Logical Database IMS database has a rule that each segment type can have only one parent. This limits the complexity of the physical database. Many DL/I applications require a complex structure that allows a segment to have two parent segment types. To overcome this limitation, DL/I allows the DBA to implement logical […]