ABAP Select data from SAP table IEHSAMNHIS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IEHSAMNHIS
*  INTO TABLE @DATA(IT_IEHSAMNHIS2).
*--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_IEHSAMNHIS INDEX 1 INTO DATA(WA_IEHSAMNHIS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IEHSAMNHIS>-MANDT = 1.
<IEHSAMNHIS>-EHSAMOUNTHISTORYUUID = 1.
<IEHSAMNHIS>-EHSAMOUNTUUID = 1.
<IEHSAMNHIS>-CREATIONDATETIME = 1.
<IEHSAMNHIS>-LASTCHANGEDATETIME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IEHSAMNHIS-CREATEDBYUSER, sy-vline,
  WA_IEHSAMNHIS-CREATEDBYUSERFULLNAME, sy-vline,
  WA_IEHSAMNHIS-LASTCHANGEDBYUSER, sy-vline,
  WA_IEHSAMNHIS-EHSAMOUNTOLDVALUE, sy-vline,
  WA_IEHSAMNHIS-EHSAMOUNTOLDSTATUS, sy-vline,
  WA_IEHSAMNHIS-EHSAMOUNTOLDVALUEISEMPTY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IEHSAMNHIS 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_IEHSAMNHIS 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_IEHSAMNHIS INTO WA_IEHSAMNHIS.


*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 TSTLC, internal->external for field CREATIONDATETIME
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_IEHSAMNHIS-CREATIONDATETIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEHSAMNHIS-CREATIONDATETIME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTLC, internal->external for field LASTCHANGEDATETIME
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_IEHSAMNHIS-LASTCHANGEDATETIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEHSAMNHIS-LASTCHANGEDATETIME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CHFLT, internal->external for field EHSAMOUNTOLDVALUE
CALL FUNCTION 'CONVERSION_EXIT_CHFLT_OUTPUT'
  EXPORTING
    input =                      WA_IEHSAMNHIS-EHSAMOUNTOLDVALUE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEHSAMNHIS-EHSAMOUNTOLDVALUE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit DFVAL, internal->external for field EHSAMOUNTOLDSTATUS
CALL FUNCTION 'CONVERSION_EXIT_DFVAL_OUTPUT'
  EXPORTING
    input =                      WA_IEHSAMNHIS-EHSAMOUNTOLDSTATUS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEHSAMNHIS-EHSAMOUNTOLDSTATUS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit DFVAL, internal->external for field EHSAMTOLDOUTOFPRECISENESSOPTR
CALL FUNCTION 'CONVERSION_EXIT_DFVAL_OUTPUT'
  EXPORTING
    input =                      WA_IEHSAMNHIS-EHSAMTOLDOUTOFPRECISENESSOPTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEHSAMNHIS-EHSAMTOLDOUTOFPRECISENESSOPTR.
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_IEHSAMNHIS_STR, 
MANDT TYPE STRING,
EHSAMOUNTHISTORYUUID TYPE STRING,
EHSAMOUNTUUID TYPE STRING,
CREATIONDATETIME TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATEDBYUSERFULLNAME TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
EHSAMOUNTOLDVALUE TYPE STRING,
EHSAMOUNTOLDSTATUS TYPE STRING,
EHSAMOUNTOLDVALUEISEMPTY TYPE STRING,
EHSAMTOLDOUTOFPRECISENESSOPTR TYPE STRING,
NOTE TYPE STRING,
EHSAMOUNTOLDVALUEASTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IEHSAMNHIS_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_IEHSAMNHIS_STR-MANDT sy-vline 
WA_IEHSAMNHIS_STR-EHSAMOUNTHISTORYUUID sy-vline 
WA_IEHSAMNHIS_STR-EHSAMOUNTUUID sy-vline 
WA_IEHSAMNHIS_STR-CREATIONDATETIME sy-vline 
WA_IEHSAMNHIS_STR-LASTCHANGEDATETIME sy-vline 
WA_IEHSAMNHIS_STR-CREATEDBYUSER sy-vline 
WA_IEHSAMNHIS_STR-CREATEDBYUSERFULLNAME sy-vline 
WA_IEHSAMNHIS_STR-LASTCHANGEDBYUSER sy-vline 
WA_IEHSAMNHIS_STR-EHSAMOUNTOLDVALUE sy-vline 
WA_IEHSAMNHIS_STR-EHSAMOUNTOLDSTATUS sy-vline 
WA_IEHSAMNHIS_STR-EHSAMOUNTOLDVALUEISEMPTY sy-vline 
WA_IEHSAMNHIS_STR-EHSAMTOLDOUTOFPRECISENESSOPTR sy-vline 
WA_IEHSAMNHIS_STR-NOTE sy-vline 
WA_IEHSAMNHIS_STR-EHSAMOUNTOLDVALUEASTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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