ABAP Select data from SAP table ACEPS_BAPI_PREDOC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ACEPS_BAPI_PREDOC
*  INTO TABLE @DATA(IT_ACEPS_BAPI_PREDOC2).
*--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_ACEPS_BAPI_PREDOC INDEX 1 INTO DATA(WA_ACEPS_BAPI_PREDOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ACEPS_BAPI_PREDOC>-HEADER = 1.
<ACEPS_BAPI_PREDOC>-OBJ_TYPE = 1.
<ACEPS_BAPI_PREDOC>-OBJ_KEY = 1.
<ACEPS_BAPI_PREDOC>-OBJ_SYS = 1.
<ACEPS_BAPI_PREDOC>-USERNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ACEPS_BAPI_PREDOC-HEADER_TXT, sy-vline,
  WA_ACEPS_BAPI_PREDOC-COMP_CODE, sy-vline,
  WA_ACEPS_BAPI_PREDOC-FISC_YEAR, sy-vline,
  WA_ACEPS_BAPI_PREDOC-DOC_DATE, sy-vline,
  WA_ACEPS_BAPI_PREDOC-TRANS_DATE, sy-vline,
  WA_ACEPS_BAPI_PREDOC-PSTNG_DATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ACEPS_BAPI_PREDOC 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_ACEPS_BAPI_PREDOC 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_ACEPS_BAPI_PREDOC INTO WA_ACEPS_BAPI_PREDOC.


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

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

*Conversion exit ALPHA, internal->external for field ACRTYPE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ACEPS_BAPI_PREDOC-ACRTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ACEPS_BAPI_PREDOC-ACRTYPE.
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_ACEPS_BAPI_PREDOC_STR, 
HEADER TYPE STRING,
OBJ_TYPE TYPE STRING,
OBJ_KEY TYPE STRING,
OBJ_SYS TYPE STRING,
USERNAME TYPE STRING,
HEADER_TXT TYPE STRING,
COMP_CODE TYPE STRING,
FISC_YEAR TYPE STRING,
DOC_DATE TYPE STRING,
TRANS_DATE TYPE STRING,
PSTNG_DATE TYPE STRING,
FIS_PERIOD TYPE STRING,
DOC_TYPE TYPE STRING,
ACC_PRINCIPLE TYPE STRING,
REF_DOC_NO TYPE STRING,
REF_DOC_NO_LONG TYPE STRING,
CURRINFO TYPE STRING,
CURRENCY TYPE STRING,
CURR_TYPE TYPE STRING,
ACEATTR TYPE STRING,
OBJID TYPE STRING,
ACRTYPE TYPE STRING,
REV_IND TYPE STRING,
LINEITEMS TYPE STRING,
ERROR_FLAG TYPE STRING,
OBJ_KEY_TMP TYPE STRING,
NO_TRANSF_TO_ACC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ACEPS_BAPI_PREDOC_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_ACEPS_BAPI_PREDOC_STR-HEADER sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-OBJ_TYPE sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-OBJ_KEY sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-OBJ_SYS sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-USERNAME sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-HEADER_TXT sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-COMP_CODE sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-FISC_YEAR sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-DOC_DATE sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-TRANS_DATE sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-PSTNG_DATE sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-FIS_PERIOD sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-DOC_TYPE sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-ACC_PRINCIPLE sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-REF_DOC_NO sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-REF_DOC_NO_LONG sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-CURRINFO sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-CURRENCY sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-CURR_TYPE sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-ACEATTR sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-OBJID sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-ACRTYPE sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-REV_IND sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-LINEITEMS sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-ERROR_FLAG sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-OBJ_KEY_TMP sy-vline 
WA_ACEPS_BAPI_PREDOC_STR-NO_TRANSF_TO_ACC sy-vline      INTO ld_text SEPARATED BY SPACE.

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