ABAP Select data from SAP table WBS_EST_POC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WBS_EST_POC
*  INTO TABLE @DATA(IT_WBS_EST_POC2).
*--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_WBS_EST_POC INDEX 1 INTO DATA(WA_WBS_EST_POC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WBS_EST_POC>-WBSNUMBER = 1.
<WBS_EST_POC>-PROGRESSVERSION = 1.
<WBS_EST_POC>-PLANNEDESTIMATEMETHOD = 1.
<WBS_EST_POC>-PLANNEDYEAR = 1.
<WBS_EST_POC>-PLANNEDPERIOD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WBS_EST_POC-PLANNEDPOC, sy-vline,
  WA_WBS_EST_POC-ACTUALESTIMATEMETHOD, sy-vline,
  WA_WBS_EST_POC-ACTUALYEAR, sy-vline,
  WA_WBS_EST_POC-ACTUALPERIOD, sy-vline,
  WA_WBS_EST_POC-ACTUALPOC, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_WBS_EST_POC 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_WBS_EST_POC 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_WBS_EST_POC INTO WA_WBS_EST_POC.


*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 ABPSN, internal->external for field WBSNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_WBS_EST_POC-WBSNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WBS_EST_POC-WBSNUMBER.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit GJAHR, internal->external for field PLANNEDYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_WBS_EST_POC-PLANNEDYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WBS_EST_POC-PLANNEDYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field ACTUALYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_WBS_EST_POC-ACTUALYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WBS_EST_POC-ACTUALYEAR.
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_WBS_EST_POC_STR, 
WBSNUMBER TYPE STRING,
PROGRESSVERSION TYPE STRING,
PLANNEDESTIMATEMETHOD TYPE STRING,
PLANNEDYEAR TYPE STRING,
PLANNEDPERIOD TYPE STRING,
PLANNEDPOC TYPE STRING,
ACTUALESTIMATEMETHOD TYPE STRING,
ACTUALYEAR TYPE STRING,
ACTUALPERIOD TYPE STRING,
ACTUALPOC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WBS_EST_POC_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_WBS_EST_POC_STR-WBSNUMBER sy-vline 
WA_WBS_EST_POC_STR-PROGRESSVERSION sy-vline 
WA_WBS_EST_POC_STR-PLANNEDESTIMATEMETHOD sy-vline 
WA_WBS_EST_POC_STR-PLANNEDYEAR sy-vline 
WA_WBS_EST_POC_STR-PLANNEDPERIOD sy-vline 
WA_WBS_EST_POC_STR-PLANNEDPOC sy-vline 
WA_WBS_EST_POC_STR-ACTUALESTIMATEMETHOD sy-vline 
WA_WBS_EST_POC_STR-ACTUALYEAR sy-vline 
WA_WBS_EST_POC_STR-ACTUALPERIOD sy-vline 
WA_WBS_EST_POC_STR-ACTUALPOC sy-vline      INTO ld_text SEPARATED BY SPACE.

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