ABAP Select data from SAP table EWAOBJ_HEAD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP EWAOBJ_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 EWAOBJ_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 EWAOBJ_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_EWAOBJ_HEAD TYPE STANDARD TABLE OF EWAOBJ_HEAD,
      WA_EWAOBJ_HEAD TYPE EWAOBJ_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: <EWAOBJ_HEAD> TYPE EWAOBJ_HEAD.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EWAOBJ_HEAD
*  INTO TABLE @DATA(IT_EWAOBJ_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_EWAOBJ_HEAD INDEX 1 INTO DATA(WA_EWAOBJ_HEAD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EWAOBJ_HEAD>-CHANGEABLE = 1.
<EWAOBJ_HEAD>-WASTE_TYPE = 1.
<EWAOBJ_HEAD>-KOMPFAKT = 1.
<EWAOBJ_HEAD>-WINTERLEVEL = 1.
<EWAOBJ_HEAD>-OUTL_CON = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EWAOBJ_HEAD-WDPLANT, sy-vline,
  WA_EWAOBJ_HEAD-WASTE_WERKS, sy-vline,
  WA_EWAOBJ_HEAD-WASTE_LGORT, sy-vline,
  WA_EWAOBJ_HEAD-EHS_PARTNER, sy-vline,
  WA_EWAOBJ_HEAD-INTAPPNO, sy-vline,
  WA_EWAOBJ_HEAD-APPNO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EWAOBJ_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_EWAOBJ_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_EWAOBJ_HEAD INTO WA_EWAOBJ_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 MATN1, internal->external for field WASTE_TYPE
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_EWAOBJ_HEAD-WASTE_TYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWAOBJ_HEAD-WASTE_TYPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OUTL_CON
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EWAOBJ_HEAD-OUTL_CON
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWAOBJ_HEAD-OUTL_CON.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WDPLANT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EWAOBJ_HEAD-WDPLANT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWAOBJ_HEAD-WDPLANT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EHS_PARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EWAOBJ_HEAD-EHS_PARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWAOBJ_HEAD-EHS_PARTNER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field INTAPPNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EWAOBJ_HEAD-INTAPPNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWAOBJ_HEAD-INTAPPNO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field APPNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EWAOBJ_HEAD-APPNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWAOBJ_HEAD-APPNO.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field TRANSPORTER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EWAOBJ_HEAD-TRANSPORTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWAOBJ_HEAD-TRANSPORTER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DISPOSER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EWAOBJ_HEAD-DISPOSER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWAOBJ_HEAD-DISPOSER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RECNWAKEY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EWAOBJ_HEAD-RECNWAKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWAOBJ_HEAD-RECNWAKEY.
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_EWAOBJ_HEAD_STR, 
CHANGEABLE TYPE STRING,
WASTE_TYPE TYPE STRING,
KOMPFAKT TYPE STRING,
WINTERLEVEL TYPE STRING,
OUTL_CON TYPE STRING,
WDPLANT TYPE STRING,
WASTE_WERKS TYPE STRING,
WASTE_LGORT TYPE STRING,
EHS_PARTNER TYPE STRING,
INTAPPNO TYPE STRING,
APPNO TYPE STRING,
RECN TYPE STRING,
WAKEYIDE TYPE STRING,
WAKEYCATLG TYPE STRING,
MNAMIN TYPE STRING,
MNAMQIN TYPE STRING,
MNINO_UNS TYPE STRING,
MNINO_BGS TYPE STRING,
TRANSPORTER TYPE STRING,
DISPOSER TYPE STRING,
RECNWAKEY TYPE STRING,
E_WERKS TYPE STRING,
E_LGORT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EWAOBJ_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_EWAOBJ_HEAD_STR-CHANGEABLE sy-vline 
WA_EWAOBJ_HEAD_STR-WASTE_TYPE sy-vline 
WA_EWAOBJ_HEAD_STR-KOMPFAKT sy-vline 
WA_EWAOBJ_HEAD_STR-WINTERLEVEL sy-vline 
WA_EWAOBJ_HEAD_STR-OUTL_CON sy-vline 
WA_EWAOBJ_HEAD_STR-WDPLANT sy-vline 
WA_EWAOBJ_HEAD_STR-WASTE_WERKS sy-vline 
WA_EWAOBJ_HEAD_STR-WASTE_LGORT sy-vline 
WA_EWAOBJ_HEAD_STR-EHS_PARTNER sy-vline 
WA_EWAOBJ_HEAD_STR-INTAPPNO sy-vline 
WA_EWAOBJ_HEAD_STR-APPNO sy-vline 
WA_EWAOBJ_HEAD_STR-RECN sy-vline 
WA_EWAOBJ_HEAD_STR-WAKEYIDE sy-vline 
WA_EWAOBJ_HEAD_STR-WAKEYCATLG sy-vline 
WA_EWAOBJ_HEAD_STR-MNAMIN sy-vline 
WA_EWAOBJ_HEAD_STR-MNAMQIN sy-vline 
WA_EWAOBJ_HEAD_STR-MNINO_UNS sy-vline 
WA_EWAOBJ_HEAD_STR-MNINO_BGS sy-vline 
WA_EWAOBJ_HEAD_STR-TRANSPORTER sy-vline 
WA_EWAOBJ_HEAD_STR-DISPOSER sy-vline 
WA_EWAOBJ_HEAD_STR-RECNWAKEY sy-vline 
WA_EWAOBJ_HEAD_STR-E_WERKS sy-vline 
WA_EWAOBJ_HEAD_STR-E_LGORT sy-vline      INTO ld_text SEPARATED BY SPACE.

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