ABAP Select data from SAP table IEPAYTAB into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IEPAYTAB table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to IEPAYTAB. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the IEPAYTAB table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_IEPAYTAB TYPE STANDARD TABLE OF IEPAYTAB,
      WA_IEPAYTAB TYPE IEPAYTAB,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <IEPAYTAB> TYPE IEPAYTAB.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_IEPAYTAB.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM IEPAYTAB
  INTO TABLE IT_IEPAYTAB.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IEPAYTAB
*  INTO TABLE @DATA(IT_IEPAYTAB2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_IEPAYTAB INDEX 1 INTO DATA(WA_IEPAYTAB2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_IEPAYTAB ASSIGNING <IEPAYTAB>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IEPAYTAB>-PERNR = 1.
<IEPAYTAB>-ENAME = 1.
<IEPAYTAB>-PAYDT = 1.
<IEPAYTAB>-ANNAMT = 1.
<IEPAYTAB>-PERWT = 1.

ENDLOOP.

LOOP AT IT_IEPAYTAB INTO WA_IEPAYTAB.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IEPAYTAB-PERIOD, sy-vline,
  WA_IEPAYTAB-BALWT, sy-vline,
  WA_IEPAYTAB-BALANCE, sy-vline,
  WA_IEPAYTAB-TOTALWT, sy-vline,
  WA_IEPAYTAB-TOTAL, sy-vline,
  WA_IEPAYTAB-SHOULD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IEPAYTAB you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_IEPAYTAB TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_IEPAYTAB INTO WA_IEPAYTAB.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_IEPAYTAB_STR, 
PERNR TYPE STRING,
ENAME TYPE STRING,
PAYDT TYPE STRING,
ANNAMT TYPE STRING,
PERWT TYPE STRING,
PERIOD TYPE STRING,
BALWT TYPE STRING,
BALANCE TYPE STRING,
TOTALWT TYPE STRING,
TOTAL TYPE STRING,
SHOULD TYPE STRING,
RSHOULD TYPE STRING,
ARREARS TYPE STRING,
ACTARR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IEPAYTAB_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_IEPAYTAB_STR-PERNR sy-vline 
WA_IEPAYTAB_STR-ENAME sy-vline 
WA_IEPAYTAB_STR-PAYDT sy-vline 
WA_IEPAYTAB_STR-ANNAMT sy-vline 
WA_IEPAYTAB_STR-PERWT sy-vline 
WA_IEPAYTAB_STR-PERIOD sy-vline 
WA_IEPAYTAB_STR-BALWT sy-vline 
WA_IEPAYTAB_STR-BALANCE sy-vline 
WA_IEPAYTAB_STR-TOTALWT sy-vline 
WA_IEPAYTAB_STR-TOTAL sy-vline 
WA_IEPAYTAB_STR-SHOULD sy-vline 
WA_IEPAYTAB_STR-RSHOULD sy-vline 
WA_IEPAYTAB_STR-ARREARS sy-vline 
WA_IEPAYTAB_STR-ACTARR sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.