ABAP Select data from SAP table ECP_PO_LIST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ECP_PO_LIST
*  INTO TABLE @DATA(IT_ECP_PO_LIST2).
*--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_ECP_PO_LIST INDEX 1 INTO DATA(WA_ECP_PO_LIST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ECP_PO_LIST>-PARENT = 1.
<ECP_PO_LIST>-OBJKEY = 1.
<ECP_PO_LIST>-OBJTYPE = 1.
<ECP_PO_LIST>-LOGSYS = 1.
<ECP_PO_LIST>-TEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ECP_PO_LIST-POSI, sy-vline,
  WA_ECP_PO_LIST-TIMESTAMP, sy-vline,
  WA_ECP_PO_LIST-EBELN, sy-vline,
  WA_ECP_PO_LIST-EBELP, sy-vline,
  WA_ECP_PO_LIST-WERKS, sy-vline,
  WA_ECP_PO_LIST-MATNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ECP_PO_LIST 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_ECP_PO_LIST 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_ECP_PO_LIST INTO WA_ECP_PO_LIST.


*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 LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ECP_PO_LIST-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ECP_PO_LIST-LOGSYS.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

*Conversion exit SGRNR, internal->external for field SGRNR
CALL FUNCTION 'CONVERSION_EXIT_SGRNR_OUTPUT'
  EXPORTING
    input =                      WA_ECP_PO_LIST-SGRNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ECP_PO_LIST-SGRNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_ECP_PO_LIST-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ECP_PO_LIST-VORNR.
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_ECP_PO_LIST_STR, 
PARENT TYPE STRING,
OBJKEY TYPE STRING,
OBJTYPE TYPE STRING,
LOGSYS TYPE STRING,
TEXT TYPE STRING,
POSI TYPE STRING,
TIMESTAMP TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
WERKS TYPE STRING,
MATNR TYPE STRING,
EMATN TYPE STRING,
TXZ01 TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
BUKRS TYPE STRING,
AEDAT TYPE STRING,
NPLNR TYPE STRING,
APLZL TYPE STRING,
ETENR TYPE STRING,
EINDT TYPE STRING,
VBELN TYPE STRING,
KUNNR TYPE STRING,
POSNR TYPE STRING,
ARKTX TYPE STRING,
SGRNR TYPE STRING,
USR00 TYPE STRING,
USR01 TYPE STRING,
NAME1 TYPE STRING,
ADRZUS TYPE STRING,
PSTLZ TYPE STRING,
ORT01 TYPE STRING,
STRAS TYPE STRING,
DISPO TYPE STRING,
VORNR TYPE STRING,
LTXA1 TYPE STRING,
DSNAM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ECP_PO_LIST_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_ECP_PO_LIST_STR-PARENT sy-vline 
WA_ECP_PO_LIST_STR-OBJKEY sy-vline 
WA_ECP_PO_LIST_STR-OBJTYPE sy-vline 
WA_ECP_PO_LIST_STR-LOGSYS sy-vline 
WA_ECP_PO_LIST_STR-TEXT sy-vline 
WA_ECP_PO_LIST_STR-POSI sy-vline 
WA_ECP_PO_LIST_STR-TIMESTAMP sy-vline 
WA_ECP_PO_LIST_STR-EBELN sy-vline 
WA_ECP_PO_LIST_STR-EBELP sy-vline 
WA_ECP_PO_LIST_STR-WERKS sy-vline 
WA_ECP_PO_LIST_STR-MATNR sy-vline 
WA_ECP_PO_LIST_STR-EMATN sy-vline 
WA_ECP_PO_LIST_STR-TXZ01 sy-vline 
WA_ECP_PO_LIST_STR-MENGE sy-vline 
WA_ECP_PO_LIST_STR-MEINS sy-vline 
WA_ECP_PO_LIST_STR-BUKRS sy-vline 
WA_ECP_PO_LIST_STR-AEDAT sy-vline 
WA_ECP_PO_LIST_STR-NPLNR sy-vline 
WA_ECP_PO_LIST_STR-APLZL sy-vline 
WA_ECP_PO_LIST_STR-ETENR sy-vline 
WA_ECP_PO_LIST_STR-EINDT sy-vline 
WA_ECP_PO_LIST_STR-VBELN sy-vline 
WA_ECP_PO_LIST_STR-KUNNR sy-vline 
WA_ECP_PO_LIST_STR-POSNR sy-vline 
WA_ECP_PO_LIST_STR-ARKTX sy-vline 
WA_ECP_PO_LIST_STR-SGRNR sy-vline 
WA_ECP_PO_LIST_STR-USR00 sy-vline 
WA_ECP_PO_LIST_STR-USR01 sy-vline 
WA_ECP_PO_LIST_STR-NAME1 sy-vline 
WA_ECP_PO_LIST_STR-ADRZUS sy-vline 
WA_ECP_PO_LIST_STR-PSTLZ sy-vline 
WA_ECP_PO_LIST_STR-ORT01 sy-vline 
WA_ECP_PO_LIST_STR-STRAS sy-vline 
WA_ECP_PO_LIST_STR-DISPO sy-vline 
WA_ECP_PO_LIST_STR-VORNR sy-vline 
WA_ECP_PO_LIST_STR-LTXA1 sy-vline 
WA_ECP_PO_LIST_STR-DSNAM sy-vline      INTO ld_text SEPARATED BY SPACE.

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