ABAP Select data from SAP table IWPLEXPPOST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IWPLEXPPOST
*  INTO TABLE @DATA(IT_IWPLEXPPOST2).
*--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_IWPLEXPPOST INDEX 1 INTO DATA(WA_IWPLEXPPOST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IWPLEXPPOST>-MANDT = 1.
<IWPLEXPPOST>-PROJECT = 1.
<IWPLEXPPOST>-WORKPACKAGE = 1.
<IWPLEXPPOST>-EMPLOYMENTINTERNALID = 1.
<IWPLEXPPOST>-WORKPACKAGENAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IWPLEXPPOST-WBSELEMENTINTERNALID, sy-vline,
  WA_IWPLEXPPOST-WORKPACKAGESTARTDATE, sy-vline,
  WA_IWPLEXPPOST-WORKPACKAGEENDDATE, sy-vline,
  WA_IWPLEXPPOST-PROJECTELEMENTUUID, sy-vline,
  WA_IWPLEXPPOST-COMPANYCODE, sy-vline,
  WA_IWPLEXPPOST-LANGUAGE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IWPLEXPPOST 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_IWPLEXPPOST 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_IWPLEXPPOST INTO WA_IWPLEXPPOST.


*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 ISOLA, internal->external for field LANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_IWPLEXPPOST-LANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IWPLEXPPOST-LANGUAGE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PROFITCENTER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IWPLEXPPOST-PROFITCENTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IWPLEXPPOST-PROFITCENTER.
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_IWPLEXPPOST_STR, 
MANDT TYPE STRING,
PROJECT TYPE STRING,
WORKPACKAGE TYPE STRING,
EMPLOYMENTINTERNALID TYPE STRING,
WORKPACKAGENAME TYPE STRING,
WBSELEMENTINTERNALID TYPE STRING,
WORKPACKAGESTARTDATE TYPE STRING,
WORKPACKAGEENDDATE TYPE STRING,
PROJECTELEMENTUUID TYPE STRING,
COMPANYCODE TYPE STRING,
LANGUAGE TYPE STRING,
COMPANYCODENAME TYPE STRING,
COUNTRY TYPE STRING,
ENGAGEMENTPROJECTTYPE TYPE STRING,
ENGAGEMENTPROJECTSERVICEORG TYPE STRING,
ENGAGEMENTPROJECTCATEGORY TYPE STRING,
CONTROLLINGAREA TYPE STRING,
PROFITCENTER TYPE STRING,
TIMEPOSTINGISRESTRICTED TYPE STRING,
WORKPACKAGEFUNCTIONISBLOCKED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IWPLEXPPOST_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_IWPLEXPPOST_STR-MANDT sy-vline 
WA_IWPLEXPPOST_STR-PROJECT sy-vline 
WA_IWPLEXPPOST_STR-WORKPACKAGE sy-vline 
WA_IWPLEXPPOST_STR-EMPLOYMENTINTERNALID sy-vline 
WA_IWPLEXPPOST_STR-WORKPACKAGENAME sy-vline 
WA_IWPLEXPPOST_STR-WBSELEMENTINTERNALID sy-vline 
WA_IWPLEXPPOST_STR-WORKPACKAGESTARTDATE sy-vline 
WA_IWPLEXPPOST_STR-WORKPACKAGEENDDATE sy-vline 
WA_IWPLEXPPOST_STR-PROJECTELEMENTUUID sy-vline 
WA_IWPLEXPPOST_STR-COMPANYCODE sy-vline 
WA_IWPLEXPPOST_STR-LANGUAGE sy-vline 
WA_IWPLEXPPOST_STR-COMPANYCODENAME sy-vline 
WA_IWPLEXPPOST_STR-COUNTRY sy-vline 
WA_IWPLEXPPOST_STR-ENGAGEMENTPROJECTTYPE sy-vline 
WA_IWPLEXPPOST_STR-ENGAGEMENTPROJECTSERVICEORG sy-vline 
WA_IWPLEXPPOST_STR-ENGAGEMENTPROJECTCATEGORY sy-vline 
WA_IWPLEXPPOST_STR-CONTROLLINGAREA sy-vline 
WA_IWPLEXPPOST_STR-PROFITCENTER sy-vline 
WA_IWPLEXPPOST_STR-TIMEPOSTINGISRESTRICTED sy-vline 
WA_IWPLEXPPOST_STR-WORKPACKAGEFUNCTIONISBLOCKED sy-vline      INTO ld_text SEPARATED BY SPACE.

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