ABAP Select data from SAP table EHPMAS_CMPSTN_COMPONENT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EHPMAS_CMPSTN_COMPONENT
*  INTO TABLE @DATA(IT_EHPMAS_CMPSTN_COMPONENT2).
*--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_EHPMAS_CMPSTN_COMPONENT INDEX 1 INTO DATA(WA_EHPMAS_CMPSTN_COMPONENT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EHPMAS_CMPSTN_COMPONENT>-CHMLCOMPUUID = 1.
<EHPMAS_CMPSTN_COMPONENT>-CHMLCMPLNCINFOUUID = 1.
<EHPMAS_CMPSTN_COMPONENT>-CHMLCOMPTYPE = 1.
<EHPMAS_CMPSTN_COMPONENT>-SUBSTANCEUUID = 1.
<EHPMAS_CMPSTN_COMPONENT>-CHMLCOMPQTY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EHPMAS_CMPSTN_COMPONENT-CHMLCOMPQTYLOWERLIMIT, sy-vline,
  WA_EHPMAS_CMPSTN_COMPONENT-CHMLCOMPQTYUPPERLIMIT, sy-vline,
  WA_EHPMAS_CMPSTN_COMPONENT-CHMLCOMPQTYUNIT, sy-vline,
  WA_EHPMAS_CMPSTN_COMPONENT-CHMLCOMPOPERATORUPPERLIMIT, sy-vline,
  WA_EHPMAS_CMPSTN_COMPONENT-CHMLCOMPOSITIONTYPE, sy-vline,
  WA_EHPMAS_CMPSTN_COMPONENT-CHMLCOMPOSITIONUUID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EHPMAS_CMPSTN_COMPONENT 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_EHPMAS_CMPSTN_COMPONENT 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_EHPMAS_CMPSTN_COMPONENT INTO WA_EHPMAS_CMPSTN_COMPONENT.


*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 CMPTP, internal->external for field CHMLCOMPTYPE
CALL FUNCTION 'CONVERSION_EXIT_CMPTP_OUTPUT'
  EXPORTING
    input =                      WA_EHPMAS_CMPSTN_COMPONENT-CHMLCOMPTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHPMAS_CMPSTN_COMPONENT-CHMLCOMPTYPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EHUNI, internal->external for field CHMLCOMPQTYUNIT
CALL FUNCTION 'CONVERSION_EXIT_EHUNI_OUTPUT'
  EXPORTING
    input =                      WA_EHPMAS_CMPSTN_COMPONENT-CHMLCOMPQTYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHPMAS_CMPSTN_COMPONENT-CHMLCOMPQTYUNIT.
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_EHPMAS_CMPSTN_COMPONENT_STR, 
CHMLCOMPUUID TYPE STRING,
CHMLCMPLNCINFOUUID TYPE STRING,
CHMLCOMPTYPE TYPE STRING,
SUBSTANCEUUID TYPE STRING,
CHMLCOMPQTY TYPE STRING,
CHMLCOMPQTYLOWERLIMIT TYPE STRING,
CHMLCOMPQTYUPPERLIMIT TYPE STRING,
CHMLCOMPQTYUNIT TYPE STRING,
CHMLCOMPOPERATORUPPERLIMIT TYPE STRING,
CHMLCOMPOSITIONTYPE TYPE STRING,
CHMLCOMPOSITIONUUID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EHPMAS_CMPSTN_COMPONENT_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_EHPMAS_CMPSTN_COMPONENT_STR-CHMLCOMPUUID sy-vline 
WA_EHPMAS_CMPSTN_COMPONENT_STR-CHMLCMPLNCINFOUUID sy-vline 
WA_EHPMAS_CMPSTN_COMPONENT_STR-CHMLCOMPTYPE sy-vline 
WA_EHPMAS_CMPSTN_COMPONENT_STR-SUBSTANCEUUID sy-vline 
WA_EHPMAS_CMPSTN_COMPONENT_STR-CHMLCOMPQTY sy-vline 
WA_EHPMAS_CMPSTN_COMPONENT_STR-CHMLCOMPQTYLOWERLIMIT sy-vline 
WA_EHPMAS_CMPSTN_COMPONENT_STR-CHMLCOMPQTYUPPERLIMIT sy-vline 
WA_EHPMAS_CMPSTN_COMPONENT_STR-CHMLCOMPQTYUNIT sy-vline 
WA_EHPMAS_CMPSTN_COMPONENT_STR-CHMLCOMPOPERATORUPPERLIMIT sy-vline 
WA_EHPMAS_CMPSTN_COMPONENT_STR-CHMLCOMPOSITIONTYPE sy-vline 
WA_EHPMAS_CMPSTN_COMPONENT_STR-CHMLCOMPOSITIONUUID sy-vline      INTO ld_text SEPARATED BY SPACE.

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