Author Archives: user

IMS DB – Data Manipulation The different data manipulation methods used in IMS DL/I calls are as follows − ISRT Call Get Hold Calls REPL Call DLET Call Let us consider the following IMS database structure to understand the data manipulation function calls − ISRT Call Points to note − ISRT call is known as […]

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 […]

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 − […]