Selection screen : Parameter statement in SAP ABAP in detail.

Selection screen : Parameter statement in SAP ABAP in detail.

In this SAP ABAP tutorial I will explain you Selection screen : Parameter statement in SAP ABAP in detail.

Parameters Statement : Parameters statement is used to declare parameter . Parameters are variable

 which takes single value as input from the selection screen . 

For example :

Parameters : p_matnr type lips-matnr.

Once we write the above line of codes , one input field will appear in the selection screen , on the left side

 of the input field , the name of the parameter will be displayed as shown in the following figure.

Selection screen : Parameter statement in SAP ABAP

Now at the back end , one variable is declared with name p_matnr which is known as parameter ,

 which is of type lips-matnr . So p_matnr will take the attributes from the dictionary i.e the type of

 lips-matnr which is char18 .Once you enter some value into the input field say 20 then the value of

 p_matnr will become 20 that we can use in our program.

SYNTAX :

PARAMETERS <parameter_name> [(<length>)] [TYPE <type>|LIKE <data_object>]     [DECIMALS <d>].

NB : 1.The clauses which are inside <> are mandatory clauses and which are inside square bracket [] are

 optional clauses.

2.The maximum length to name a parameter will be 8 . In our case length of p_matnr is 7 as number

 of characters are 7.

3. <type> valid for parameters will be predefined ABAP type ( eg : i , d , string , xstring etc) or ABAP

 dictionary data type ( eg : lips-matnr) except data type F.

4.If the parameter refers to the data types from the dictionary , it will adopt all the attributes of the dictionary

 field like field help ( F1 ) , search help ( F4 ).

5. <d> signifies the number of decimal places for numeric values .

Example :

REPORT  ztestr_22.
DATA : lv_matnr TYPE matnr.
PARAMETERS : p_par1     LIKE lv_matnr,
             p_par2     LIKE lips-matnr,
             p_par3(10) TYPE c,
             p_par4(10) TYPE i,
             p_par5     TYPE p DECIMALS 4,
             p_par6     TYPE lips-matnr,
             p_par7     .

Output :



Selection screen : Parameter statement in SAP ABAP

In the above example seven parameters are declared and displayed in the selection screen.

  

1.   P_par1 : it is declared using the like clause and data object lv_matnr is given which is declared above  , 

so p_par1 will adopt all the attributes of lv_matnr which is of type matnr i.e. character type of length 18 ,

 field help ( F1 ) and search help ( F4 ) of data element matnr.

2.   P_par2 : it will adopt all the attributes of lips-matnr i.e. character type of length 18, field help ( F1 ) 

and search help ( F4 ) of data element matnr.

3.   P_par3 : it will be declared as character type of length 10.

4.   P_par4 : it will be declared as integer type of length 10.

5.   P_par5 : it will be declared as packed type with values upto 4 decimal places.

6.   P_par6 : it will adopt all the attributes of lips-matnr i.e. character type of length 18, field help ( F1 )

 and search help ( F4 ) of data element matnr.

7.   P_par7 : it will be declared as character type of default length 1.