ABAP Select data from SAP table PGTAB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PGTAB
*  INTO TABLE @DATA(IT_PGTAB2).
*--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_PGTAB INDEX 1 INTO DATA(WA_PGTAB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PGTAB>-DATUM = 1.
<PGTAB>-PGHST = 1.
<PGTAB>-PRGRP = 1.
<PGTAB>-WERKS = 1.
<PGTAB>-VSNDA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PGTAB-ANTEI, sy-vline,
  WA_PGTAB-ANTEH, sy-vline,
  WA_PGTAB-PRKOF, sy-vline,
  WA_PGTAB-PRKOH, sy-vline,
  WA_PGTAB-UMREF, sy-vline,
  WA_PGTAB-UMREH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PGTAB 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_PGTAB 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_PGTAB INTO WA_PGTAB.


*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.

*Conversion exit MATN1, internal->external for field PRGRP
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_PGTAB-PRGRP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PGTAB-PRGRP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PGTAB-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PGTAB-MEINS.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

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

TYPES: BEGIN OF T_PGTAB_STR, 
DATUM TYPE STRING,
PGHST TYPE STRING,
PRGRP TYPE STRING,
WERKS TYPE STRING,
VSNDA TYPE STRING,
ANTEI TYPE STRING,
ANTEH TYPE STRING,
PRKOF TYPE STRING,
PRKOH TYPE STRING,
UMREF TYPE STRING,
UMREH TYPE STRING,
MTART TYPE STRING,
PERKZ TYPE STRING,
PERIV TYPE STRING,
MEINS TYPE STRING,
MAKTX TYPE STRING,
PGTYP TYPE STRING,
DISPO TYPE STRING,
FIXKZ TYPE STRING,
DISST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PGTAB_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_PGTAB_STR-DATUM sy-vline 
WA_PGTAB_STR-PGHST sy-vline 
WA_PGTAB_STR-PRGRP sy-vline 
WA_PGTAB_STR-WERKS sy-vline 
WA_PGTAB_STR-VSNDA sy-vline 
WA_PGTAB_STR-ANTEI sy-vline 
WA_PGTAB_STR-ANTEH sy-vline 
WA_PGTAB_STR-PRKOF sy-vline 
WA_PGTAB_STR-PRKOH sy-vline 
WA_PGTAB_STR-UMREF sy-vline 
WA_PGTAB_STR-UMREH sy-vline 
WA_PGTAB_STR-MTART sy-vline 
WA_PGTAB_STR-PERKZ sy-vline 
WA_PGTAB_STR-PERIV sy-vline 
WA_PGTAB_STR-MEINS sy-vline 
WA_PGTAB_STR-MAKTX sy-vline 
WA_PGTAB_STR-PGTYP sy-vline 
WA_PGTAB_STR-DISPO sy-vline 
WA_PGTAB_STR-FIXKZ sy-vline 
WA_PGTAB_STR-DISST sy-vline      INTO ld_text SEPARATED BY SPACE.

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