ABAP Select data from SAP table WSTI_INV_DOC_CONTROL_ADD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WSTI_INV_DOC_CONTROL_ADD
*  INTO TABLE @DATA(IT_WSTI_INV_DOC_CONTROL_ADD2).
*--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_WSTI_INV_DOC_CONTROL_ADD INDEX 1 INTO DATA(WA_WSTI_INV_DOC_CONTROL_ADD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WSTI_INV_DOC_CONTROL_ADD>-MODEL_USAGE = 1.
<WSTI_INV_DOC_CONTROL_ADD>-MAT_ID_VISIBLE = 1.
<WSTI_INV_DOC_CONTROL_ADD>-MATID = 1.
<WSTI_INV_DOC_CONTROL_ADD>-DESCR = 1.
<WSTI_INV_DOC_CONTROL_ADD>-NUM_STGE_LOC = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WSTI_INV_DOC_CONTROL_ADD-TASK, sy-vline,
  WA_WSTI_INV_DOC_CONTROL_ADD-READ_ONLY, sy-vline,
  WA_WSTI_INV_DOC_CONTROL_ADD-ITEMS_VISIBLE, sy-vline,
  WA_WSTI_INV_DOC_CONTROL_ADD-ITEMS_CNT_VISIBLE, sy-vline,
  WA_WSTI_INV_DOC_CONTROL_ADD-ITEMS_DIFF_VISIBLE, sy-vline,
  WA_WSTI_INV_DOC_CONTROL_ADD-TOTAL_OPEN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WSTI_INV_DOC_CONTROL_ADD 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_WSTI_INV_DOC_CONTROL_ADD 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_WSTI_INV_DOC_CONTROL_ADD INTO WA_WSTI_INV_DOC_CONTROL_ADD.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_WSTI_INV_DOC_CONTROL_ADD_STR, 
MODEL_USAGE TYPE STRING,
MAT_ID_VISIBLE TYPE STRING,
MATID TYPE STRING,
DESCR TYPE STRING,
NUM_STGE_LOC TYPE STRING,
TASK TYPE STRING,
READ_ONLY TYPE STRING,
ITEMS_VISIBLE TYPE STRING,
ITEMS_CNT_VISIBLE TYPE STRING,
ITEMS_DIFF_VISIBLE TYPE STRING,
TOTAL_OPEN TYPE STRING,
TOTAL_INACTIVE TYPE STRING,
TOTAL_ACTIVE TYPE STRING,
COUNTED TYPE STRING,
UNCOUNTED TYPE STRING,
WITH_DIFF TYPE STRING,
WITHOUT_DIFF TYPE STRING,
WAIT_AFTER_COMMIT TYPE STRING,
NO_COMMIT_WORK TYPE STRING,
COMMIT_WORK TYPE STRING,
COMMIT_WORK_AND_WAIT TYPE STRING,
DETAIL_INDEX TYPE STRING,
DETAIL_NUM_SEL TYPE STRING,
DOCUMENT_OK TYPE STRING,
READ_ONLY_IF_LOCKED TYPE STRING,
ALV_TBAR_ACTIVATION TYPE STRING,
BP_VERSION TYPE STRING,
DIRTY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WSTI_INV_DOC_CONTROL_ADD_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_WSTI_INV_DOC_CONTROL_ADD_STR-MODEL_USAGE sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-MAT_ID_VISIBLE sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-MATID sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-DESCR sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-NUM_STGE_LOC sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-TASK sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-READ_ONLY sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-ITEMS_VISIBLE sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-ITEMS_CNT_VISIBLE sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-ITEMS_DIFF_VISIBLE sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-TOTAL_OPEN sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-TOTAL_INACTIVE sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-TOTAL_ACTIVE sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-COUNTED sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-UNCOUNTED sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-WITH_DIFF sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-WITHOUT_DIFF sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-WAIT_AFTER_COMMIT sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-NO_COMMIT_WORK sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-COMMIT_WORK sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-COMMIT_WORK_AND_WAIT sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-DETAIL_INDEX sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-DETAIL_NUM_SEL sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-DOCUMENT_OK sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-READ_ONLY_IF_LOCKED sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-ALV_TBAR_ACTIVATION sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-BP_VERSION sy-vline 
WA_WSTI_INV_DOC_CONTROL_ADD_STR-DIRTY sy-vline      INTO ld_text SEPARATED BY SPACE.

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