ABAP Select data from SAP table PS9991 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PS9991 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 PS9991. 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 PS9991 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_PS9991 TYPE STANDARD TABLE OF PS9991,
      WA_PS9991 TYPE PS9991,
      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: <PS9991> TYPE PS9991.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PS9991.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PS9991
  INTO TABLE IT_PS9991.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PS9991
*  INTO TABLE @DATA(IT_PS99912).
*--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_PS9991 INDEX 1 INTO DATA(WA_PS99912).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PS9991 ASSIGNING <PS9991>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PS9991>-PY_SEQNR = 1.
<PS9991>-MOLGA = 1.
<PS9991>-ABKRS = 1.
<PS9991>-WAERS = 1.
<PS9991>-FPPER = 1.

ENDLOOP.

LOOP AT IT_PS9991 INTO WA_PS9991.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PS9991-PAYTY, sy-vline,
  WA_PS9991-PAYID, sy-vline,
  WA_PS9991-PAY_DATE, sy-vline,
  WA_PS9991-ZZTEL0115B, sy-vline,
  WA_PS9991-ZZTEL0119B, sy-vline,
  WA_PS9991-ZZTEL0123B, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PS9991 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_PS9991 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_PS9991 INTO WA_PS9991.


*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_PS9991_STR, 
PY_SEQNR TYPE STRING,
MOLGA TYPE STRING,
ABKRS TYPE STRING,
WAERS TYPE STRING,
FPPER TYPE STRING,
PAYTY TYPE STRING,
PAYID TYPE STRING,
PAY_DATE TYPE STRING,
ZZTEL0115B TYPE STRING,
ZZTEL0119B TYPE STRING,
ZZTEL0123B TYPE STRING,
ZZTEL0127A TYPE STRING,
ZZTEL0131B TYPE STRING,
ZZTEL0135A TYPE STRING,
ZZTEL0139B TYPE STRING,
ZZTEL0143B TYPE STRING,
ZZTEL0147A TYPE STRING,
ZZTEL0151B TYPE STRING,
ZZTEL0155B TYPE STRING,
ZZTEL0159A TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PS9991_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_PS9991_STR-PY_SEQNR sy-vline 
WA_PS9991_STR-MOLGA sy-vline 
WA_PS9991_STR-ABKRS sy-vline 
WA_PS9991_STR-WAERS sy-vline 
WA_PS9991_STR-FPPER sy-vline 
WA_PS9991_STR-PAYTY sy-vline 
WA_PS9991_STR-PAYID sy-vline 
WA_PS9991_STR-PAY_DATE sy-vline 
WA_PS9991_STR-ZZTEL0115B sy-vline 
WA_PS9991_STR-ZZTEL0119B sy-vline 
WA_PS9991_STR-ZZTEL0123B sy-vline 
WA_PS9991_STR-ZZTEL0127A sy-vline 
WA_PS9991_STR-ZZTEL0131B sy-vline 
WA_PS9991_STR-ZZTEL0135A sy-vline 
WA_PS9991_STR-ZZTEL0139B sy-vline 
WA_PS9991_STR-ZZTEL0143B sy-vline 
WA_PS9991_STR-ZZTEL0147A sy-vline 
WA_PS9991_STR-ZZTEL0151B sy-vline 
WA_PS9991_STR-ZZTEL0155B sy-vline 
WA_PS9991_STR-ZZTEL0159A sy-vline      INTO ld_text SEPARATED BY SPACE.

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