ABAP Select data from SAP table J_1BAA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_1BAA 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 J_1BAA. 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 J_1BAA 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_J_1BAA TYPE STANDARD TABLE OF J_1BAA,
      WA_J_1BAA TYPE J_1BAA,
      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: <J_1BAA> TYPE J_1BAA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_1BAA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_1BAA
  INTO TABLE IT_J_1BAA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_1BAA
*  INTO TABLE @DATA(IT_J_1BAA2).
*--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_J_1BAA INDEX 1 INTO DATA(WA_J_1BAA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_1BAA ASSIGNING <J_1BAA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_1BAA>-MANDT = 1.
<J_1BAA>-NFTYPE = 1.
<J_1BAA>-DOCTYP = 1.
<J_1BAA>-DIRECT = 1.
<J_1BAA>-ENTRAD = 1.

ENDLOOP.

LOOP AT IT_J_1BAA INTO WA_J_1BAA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_1BAA-NFTYPC, sy-vline,
  WA_J_1BAA-FORM, sy-vline,
  WA_J_1BAA-MODEL, sy-vline,
  WA_J_1BAA-PARVW, sy-vline,
  WA_J_1BAA-PARTYP, sy-vline,
  WA_J_1BAA-ITMTYP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_1BAA 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_J_1BAA 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_J_1BAA INTO WA_J_1BAA.


*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 ITMTYP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_1BAA-ITMTYP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1BAA-ITMTYP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TEXTKEY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_1BAA-TEXTKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1BAA-TEXTKEY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field GEWEI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_1BAA-GEWEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1BAA-GEWEI.
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_J_1BAA_STR, 
MANDT TYPE STRING,
NFTYPE TYPE STRING,
DOCTYP TYPE STRING,
DIRECT TYPE STRING,
ENTRAD TYPE STRING,
NFTYPC TYPE STRING,
FORM TYPE STRING,
MODEL TYPE STRING,
PARVW TYPE STRING,
PARTYP TYPE STRING,
ITMTYP TYPE STRING,
TEXTKEY TYPE STRING,
SHIPFROM TYPE STRING,
GEWEI TYPE STRING,
NFTYPECONTI TYPE STRING,
NFE TYPE STRING,
NFENRNR TYPE STRING,
FORM_SCAN TYPE STRING,
CTE_TYPE TYPE STRING,
MUNICIPAL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_1BAA_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_J_1BAA_STR-MANDT sy-vline 
WA_J_1BAA_STR-NFTYPE sy-vline 
WA_J_1BAA_STR-DOCTYP sy-vline 
WA_J_1BAA_STR-DIRECT sy-vline 
WA_J_1BAA_STR-ENTRAD sy-vline 
WA_J_1BAA_STR-NFTYPC sy-vline 
WA_J_1BAA_STR-FORM sy-vline 
WA_J_1BAA_STR-MODEL sy-vline 
WA_J_1BAA_STR-PARVW sy-vline 
WA_J_1BAA_STR-PARTYP sy-vline 
WA_J_1BAA_STR-ITMTYP sy-vline 
WA_J_1BAA_STR-TEXTKEY sy-vline 
WA_J_1BAA_STR-SHIPFROM sy-vline 
WA_J_1BAA_STR-GEWEI sy-vline 
WA_J_1BAA_STR-NFTYPECONTI sy-vline 
WA_J_1BAA_STR-NFE sy-vline 
WA_J_1BAA_STR-NFENRNR sy-vline 
WA_J_1BAA_STR-FORM_SCAN sy-vline 
WA_J_1BAA_STR-CTE_TYPE sy-vline 
WA_J_1BAA_STR-MUNICIPAL sy-vline      INTO ld_text SEPARATED BY SPACE.

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