ABAP Select data from SAP table /ISDFPS/151EHS_DG_HEAD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /ISDFPS/151EHS_DG_HEAD 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 /ISDFPS/151EHS_DG_HEAD. 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 /ISDFPS/151EHS_DG_HEAD 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_/ISDFPS/151EHS_DG_HEAD TYPE STANDARD TABLE OF /ISDFPS/151EHS_DG_HEAD,
      WA_/ISDFPS/151EHS_DG_HEAD TYPE /ISDFPS/151EHS_DG_HEAD,
      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: </ISDFPS/151EHS_DG_HEAD> TYPE /ISDFPS/151EHS_DG_HEAD.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/ISDFPS/151EHS_DG_HEAD.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /ISDFPS/151EHS_DG_HEAD
  INTO TABLE IT_/ISDFPS/151EHS_DG_HEAD.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /ISDFPS/151EHS_DG_HEAD
*  INTO TABLE @DATA(IT_/ISDFPS/151EHS_DG_HEAD2).
*--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_/ISDFPS/151EHS_DG_HEAD INDEX 1 INTO DATA(WA_/ISDFPS/151EHS_DG_HEAD2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/ISDFPS/151EHS_DG_HEAD ASSIGNING </ISDFPS/151EHS_DG_HEAD>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</ISDFPS/151EHS_DG_HEAD>-MATERIAL = 1.
</ISDFPS/151EHS_DG_HEAD>-REGULATION = 1.
</ISDFPS/151EHS_DG_HEAD>-VALID_FROM = 1.
</ISDFPS/151EHS_DG_HEAD>-VALID_TO = 1.
</ISDFPS/151EHS_DG_HEAD>-CLASS = 1.

ENDLOOP.

LOOP AT IT_/ISDFPS/151EHS_DG_HEAD INTO WA_/ISDFPS/151EHS_DG_HEAD.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/ISDFPS/151EHS_DG_HEAD-SUB_CLASS, sy-vline,
  WA_/ISDFPS/151EHS_DG_HEAD-NO_DANGGOOD, sy-vline,
  WA_/ISDFPS/151EHS_DG_HEAD-CATEGORY, sy-vline,
  WA_/ISDFPS/151EHS_DG_HEAD-LETTER, sy-vline,
  WA_/ISDFPS/151EHS_DG_HEAD-PCKGGRP, sy-vline,
  WA_/ISDFPS/151EHS_DG_HEAD-COLNO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/ISDFPS/151EHS_DG_HEAD 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_/ISDFPS/151EHS_DG_HEAD 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_/ISDFPS/151EHS_DG_HEAD INTO WA_/ISDFPS/151EHS_DG_HEAD.


*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 MATN5, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN5_OUTPUT'
  EXPORTING
    input =                      WA_/ISDFPS/151EHS_DG_HEAD-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ISDFPS/151EHS_DG_HEAD-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field FP_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/ISDFPS/151EHS_DG_HEAD-FP_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ISDFPS/151EHS_DG_HEAD-FP_UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATERIAL_LONG
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_/ISDFPS/151EHS_DG_HEAD-MATERIAL_LONG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ISDFPS/151EHS_DG_HEAD-MATERIAL_LONG.
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_/ISDFPS/151EHS_DG_HEAD_STR, 
MATERIAL TYPE STRING,
REGULATION TYPE STRING,
VALID_FROM TYPE STRING,
VALID_TO TYPE STRING,
CLASS TYPE STRING,
SUB_CLASS TYPE STRING,
NO_DANGGOOD TYPE STRING,
CATEGORY TYPE STRING,
LETTER TYPE STRING,
PCKGGRP TYPE STRING,
COLNO TYPE STRING,
PROP_SHIP_NAME TYPE STRING,
PROP_SHIP_NAME_PHRID TYPE STRING,
HAZIND_1 TYPE STRING,
HAZIND_1_PHRID TYPE STRING,
HAZIND_2 TYPE STRING,
HAZIND_2_PHRID TYPE STRING,
HAZIND_3 TYPE STRING,
HAZIND_3_PHRID TYPE STRING,
MAR_POL TYPE STRING,
HAZIND_PHR_MP1 TYPE STRING,
HAZIND_PHR_MP1_PHRID TYPE STRING,
HAZIND_PHR_MP2 TYPE STRING,
HAZIND_PHR_MP2_PHRID TYPE STRING,
FP_UNIT_ISO TYPE STRING,
EMS_NO_1 TYPE STRING,
EMS_NO_2 TYPE STRING,
TREM_NO_1 TYPE STRING,
FP_UNIT TYPE STRING,
FLASH_PT TYPE STRING,
PARKFLG TYPE STRING,
DGWOS TYPE STRING,
DGNU TYPE STRING,
HNU TYPE STRING,
HPN1 TYPE STRING,
HPN2 TYPE STRING,
HPN3 TYPE STRING,
HPN4 TYPE STRING,
MATERIAL_LONG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/ISDFPS/151EHS_DG_HEAD_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_/ISDFPS/151EHS_DG_HEAD_STR-MATERIAL sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-REGULATION sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-VALID_FROM sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-VALID_TO sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-CLASS sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-SUB_CLASS sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-NO_DANGGOOD sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-CATEGORY sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-LETTER sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-PCKGGRP sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-COLNO sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-PROP_SHIP_NAME sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-PROP_SHIP_NAME_PHRID sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-HAZIND_1 sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-HAZIND_1_PHRID sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-HAZIND_2 sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-HAZIND_2_PHRID sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-HAZIND_3 sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-HAZIND_3_PHRID sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-MAR_POL sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-HAZIND_PHR_MP1 sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-HAZIND_PHR_MP1_PHRID sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-HAZIND_PHR_MP2 sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-HAZIND_PHR_MP2_PHRID sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-FP_UNIT_ISO sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-EMS_NO_1 sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-EMS_NO_2 sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-TREM_NO_1 sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-FP_UNIT sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-FLASH_PT sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-PARKFLG sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-DGWOS sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-DGNU sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-HNU sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-HPN1 sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-HPN2 sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-HPN3 sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-HPN4 sy-vline 
WA_/ISDFPS/151EHS_DG_HEAD_STR-MATERIAL_LONG sy-vline      INTO ld_text SEPARATED BY SPACE.

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