ABAP Select data from SAP table EWAOBJ_MAIN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP EWAOBJ_MAIN 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_MAIN. 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_MAIN 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_MAIN TYPE STANDARD TABLE OF EWAOBJ_MAIN,
      WA_EWAOBJ_MAIN TYPE EWAOBJ_MAIN,
      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_MAIN> TYPE EWAOBJ_MAIN.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EWAOBJ_MAIN
*  INTO TABLE @DATA(IT_EWAOBJ_MAIN2).
*--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_MAIN INDEX 1 INTO DATA(WA_EWAOBJ_MAIN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EWAOBJ_MAIN>-OBKNR = 1.
<EWAOBJ_MAIN>-OBZAE = 1.
<EWAOBJ_MAIN>-ANLAGE = 1.
<EWAOBJ_MAIN>-OPERAND = 1.
<EWAOBJ_MAIN>-OPLFDNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EWAOBJ_MAIN-SERVLOC, sy-vline,
  WA_EWAOBJ_MAIN-MATNR, sy-vline,
  WA_EWAOBJ_MAIN-EQUNR, sy-vline,
  WA_EWAOBJ_MAIN-ADRNR, sy-vline,
  WA_EWAOBJ_MAIN-CHANGEABLE, sy-vline,
  WA_EWAOBJ_MAIN-PRODUCT_AREA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EWAOBJ_MAIN 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_MAIN 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_MAIN INTO WA_EWAOBJ_MAIN.


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

*Conversion exit TPLNR, internal->external for field SERVLOC
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_EWAOBJ_MAIN-SERVLOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWAOBJ_MAIN-SERVLOC.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field IBASE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EWAOBJ_MAIN-IBASE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWAOBJ_MAIN-IBASE.
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_MAIN_STR, 
OBKNR TYPE STRING,
OBZAE TYPE STRING,
ANLAGE TYPE STRING,
OPERAND TYPE STRING,
OPLFDNR TYPE STRING,
SERVLOC TYPE STRING,
MATNR TYPE STRING,
EQUNR TYPE STRING,
ADRNR TYPE STRING,
CHANGEABLE TYPE STRING,
PRODUCT_AREA TYPE STRING,
WASTE_TYPE TYPE STRING,
BEH_TYPE TYPE STRING,
ROUTE_MAIN TYPE STRING,
LOGIKNR TYPE STRING,
DEVGRP TYPE STRING,
KOMPFAKT TYPE STRING,
ROB TYPE STRING,
WINTERLEVEL TYPE STRING,
REGPOLIT TYPE STRING,
COUNTRY TYPE STRING,
OUTL_CON TYPE STRING,
WDPLANT TYPE STRING,
WASTE_WERKS TYPE STRING,
WASTE_LGORT TYPE STRING,
IBASE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EWAOBJ_MAIN_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_MAIN_STR-OBKNR sy-vline 
WA_EWAOBJ_MAIN_STR-OBZAE sy-vline 
WA_EWAOBJ_MAIN_STR-ANLAGE sy-vline 
WA_EWAOBJ_MAIN_STR-OPERAND sy-vline 
WA_EWAOBJ_MAIN_STR-OPLFDNR sy-vline 
WA_EWAOBJ_MAIN_STR-SERVLOC sy-vline 
WA_EWAOBJ_MAIN_STR-MATNR sy-vline 
WA_EWAOBJ_MAIN_STR-EQUNR sy-vline 
WA_EWAOBJ_MAIN_STR-ADRNR sy-vline 
WA_EWAOBJ_MAIN_STR-CHANGEABLE sy-vline 
WA_EWAOBJ_MAIN_STR-PRODUCT_AREA sy-vline 
WA_EWAOBJ_MAIN_STR-WASTE_TYPE sy-vline 
WA_EWAOBJ_MAIN_STR-BEH_TYPE sy-vline 
WA_EWAOBJ_MAIN_STR-ROUTE_MAIN sy-vline 
WA_EWAOBJ_MAIN_STR-LOGIKNR sy-vline 
WA_EWAOBJ_MAIN_STR-DEVGRP sy-vline 
WA_EWAOBJ_MAIN_STR-KOMPFAKT sy-vline 
WA_EWAOBJ_MAIN_STR-ROB sy-vline 
WA_EWAOBJ_MAIN_STR-WINTERLEVEL sy-vline 
WA_EWAOBJ_MAIN_STR-REGPOLIT sy-vline 
WA_EWAOBJ_MAIN_STR-COUNTRY sy-vline 
WA_EWAOBJ_MAIN_STR-OUTL_CON sy-vline 
WA_EWAOBJ_MAIN_STR-WDPLANT sy-vline 
WA_EWAOBJ_MAIN_STR-WASTE_WERKS sy-vline 
WA_EWAOBJ_MAIN_STR-WASTE_LGORT sy-vline 
WA_EWAOBJ_MAIN_STR-IBASE sy-vline      INTO ld_text SEPARATED BY SPACE.

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