Answer / somashekar

to make a changes in BAPI Parameter we will be using staemt 'X".

Answer / somashekar

When the BAPI is called, the fields in the additional change parameter whose ... additional change parameter consists of the parameter name with the suffix "X".

Answer / santhi

'x' is used to commit/update the data into database

Answer / sathish kumar

In BAPIs that cause database changes (for example, Change() and Create() BAPIs), you must be able to distinguish between parameter fields that are to be modified (change-relevant fields) and parameter fields that are to remain unmodified.
Using an initial value is no solution because an initial value could also represent a valid new value. Also, in the ABAP programming language as well as on other development platforms, the value "NULL" should not be assigned to a data type to indicate an empty field.
Standardized change parameters are used to identify fields with modified values in Change() and Create() BAPIs. You can do this in two ways:
Flagging Fields to Identify Fields Containing Modified Values
Comparing Fields to Identify Fields Containing Modified Values
Flagging Fields to Identify Fields Containing Modified Values
In this approach parameter fields containing modified values are identified by including a flag in an additional "change parameter".
An additional change parameter must be created with the same number of fields and the same field names for every parameter in the BAPI containing modified field values.
When the BAPI is called, the fields in the additional change parameter whose counterparts in the corresponding parameter contain modifications, must be marked with an update flag.
This way the BAPI can identify both modified and unmodified fields in the parameter.
Follow the conventions below when you create change parameters to identify modified fields:
The name of the additional change parameter consists of the parameter name with the suffix "X". For instance, if the parameter is called EquiSales, the name of the additional change parameter is EquiSalesX.
The additional change parameter must contain exactly the same number of fields and the same field names as the parameter. You must use the data element BAPIUPDATE (CHAR 1) as the data element for the update fields. This can have the following values:
'X'

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