ABAP Select data from SAP table BAPISLHEAD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPISLHEAD
*  INTO TABLE @DATA(IT_BAPISLHEAD2).
*--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_BAPISLHEAD INDEX 1 INTO DATA(WA_BAPISLHEAD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPISLHEAD>-REF_DOC = 1.
<BAPISLHEAD>-PAYTYPE = 1.
<BAPISLHEAD>-BILL_DATE = 1.
<BAPISLHEAD>-DIFF_INV = 1.
<BAPISLHEAD>-PURCH_ORG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPISLHEAD-PUR_GROUP, sy-vline,
  WA_BAPISLHEAD-COMP_CODE, sy-vline,
  WA_BAPISLHEAD-CURRENCY, sy-vline,
  WA_BAPISLHEAD-CURRENCY_ISO, sy-vline,
  WA_BAPISLHEAD-DOC_DATE, sy-vline,
  WA_BAPISLHEAD-REF_DOC_NO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPISLHEAD 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_BAPISLHEAD 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_BAPISLHEAD INTO WA_BAPISLHEAD.


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

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

*Conversion exit ALPHA, internal->external for field ALT_PAYEE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPISLHEAD-ALT_PAYEE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPISLHEAD-ALT_PAYEE.
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_BAPISLHEAD_STR, 
REF_DOC TYPE STRING,
PAYTYPE TYPE STRING,
BILL_DATE TYPE STRING,
DIFF_INV TYPE STRING,
PURCH_ORG TYPE STRING,
PUR_GROUP TYPE STRING,
COMP_CODE TYPE STRING,
CURRENCY TYPE STRING,
CURRENCY_ISO TYPE STRING,
DOC_DATE TYPE STRING,
REF_DOC_NO TYPE STRING,
PAYMT_REF TYPE STRING,
GROSS_AMNT TYPE STRING,
EXCH_RATE TYPE STRING,
EX_RATE_FX TYPE STRING,
TRANS_DATE TYPE STRING,
PMNTTRMS TYPE STRING,
DSCNT1_TO TYPE STRING,
DSCT_PCT1 TYPE STRING,
DSCNT2_TO TYPE STRING,
DSCT_PCT2 TYPE STRING,
DSCNT3_TO TYPE STRING,
ADD_VAL_DY TYPE STRING,
FIX_VAL_DY TYPE STRING,
SALESORG TYPE STRING,
DISTR_CHAN TYPE STRING,
DIVISION TYPE STRING,
TESTRUN TYPE STRING,
EXCH_RATE_V TYPE STRING,
ALLOC_NMBR TYPE STRING,
DOCID TYPE STRING,
SALES_OFF TYPE STRING,
SALES_GRP TYPE STRING,
LOGSYSTEM TYPE STRING,
REF_DOC_NO_LONG TYPE STRING,
BILL_REASON TYPE STRING,
ALT_PAYEE TYPE STRING,
POSTING_PARTY TYPE STRING,
IDO_TYPE_VENDOR TYPE STRING,
ID_OBJECT_VENDOR TYPE STRING,
VAT_REG_NO_V TYPE STRING,
INCOTERMS1 TYPE STRING,
INCOTERMS2 TYPE STRING,
INCOTERMSV TYPE STRING,
INCOTERMS2L TYPE STRING,
INCOTERMS3L TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPISLHEAD_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_BAPISLHEAD_STR-REF_DOC sy-vline 
WA_BAPISLHEAD_STR-PAYTYPE sy-vline 
WA_BAPISLHEAD_STR-BILL_DATE sy-vline 
WA_BAPISLHEAD_STR-DIFF_INV sy-vline 
WA_BAPISLHEAD_STR-PURCH_ORG sy-vline 
WA_BAPISLHEAD_STR-PUR_GROUP sy-vline 
WA_BAPISLHEAD_STR-COMP_CODE sy-vline 
WA_BAPISLHEAD_STR-CURRENCY sy-vline 
WA_BAPISLHEAD_STR-CURRENCY_ISO sy-vline 
WA_BAPISLHEAD_STR-DOC_DATE sy-vline 
WA_BAPISLHEAD_STR-REF_DOC_NO sy-vline 
WA_BAPISLHEAD_STR-PAYMT_REF sy-vline 
WA_BAPISLHEAD_STR-GROSS_AMNT sy-vline 
WA_BAPISLHEAD_STR-EXCH_RATE sy-vline 
WA_BAPISLHEAD_STR-EX_RATE_FX sy-vline 
WA_BAPISLHEAD_STR-TRANS_DATE sy-vline 
WA_BAPISLHEAD_STR-PMNTTRMS sy-vline 
WA_BAPISLHEAD_STR-DSCNT1_TO sy-vline 
WA_BAPISLHEAD_STR-DSCT_PCT1 sy-vline 
WA_BAPISLHEAD_STR-DSCNT2_TO sy-vline 
WA_BAPISLHEAD_STR-DSCT_PCT2 sy-vline 
WA_BAPISLHEAD_STR-DSCNT3_TO sy-vline 
WA_BAPISLHEAD_STR-ADD_VAL_DY sy-vline 
WA_BAPISLHEAD_STR-FIX_VAL_DY sy-vline 
WA_BAPISLHEAD_STR-SALESORG sy-vline 
WA_BAPISLHEAD_STR-DISTR_CHAN sy-vline 
WA_BAPISLHEAD_STR-DIVISION sy-vline 
WA_BAPISLHEAD_STR-TESTRUN sy-vline 
WA_BAPISLHEAD_STR-EXCH_RATE_V sy-vline 
WA_BAPISLHEAD_STR-ALLOC_NMBR sy-vline 
WA_BAPISLHEAD_STR-DOCID sy-vline 
WA_BAPISLHEAD_STR-SALES_OFF sy-vline 
WA_BAPISLHEAD_STR-SALES_GRP sy-vline 
WA_BAPISLHEAD_STR-LOGSYSTEM sy-vline 
WA_BAPISLHEAD_STR-REF_DOC_NO_LONG sy-vline 
WA_BAPISLHEAD_STR-BILL_REASON sy-vline 
WA_BAPISLHEAD_STR-ALT_PAYEE sy-vline 
WA_BAPISLHEAD_STR-POSTING_PARTY sy-vline 
WA_BAPISLHEAD_STR-IDO_TYPE_VENDOR sy-vline 
WA_BAPISLHEAD_STR-ID_OBJECT_VENDOR sy-vline 
WA_BAPISLHEAD_STR-VAT_REG_NO_V sy-vline 
WA_BAPISLHEAD_STR-INCOTERMS1 sy-vline 
WA_BAPISLHEAD_STR-INCOTERMS2 sy-vline 
WA_BAPISLHEAD_STR-INCOTERMSV sy-vline 
WA_BAPISLHEAD_STR-INCOTERMS2L sy-vline 
WA_BAPISLHEAD_STR-INCOTERMS3L sy-vline      INTO ld_text SEPARATED BY SPACE.

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