ABAP Select data from SAP table J_1BLB01_DETAIL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_1BLB01_DETAIL 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_1BLB01_DETAIL. 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_1BLB01_DETAIL 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_1BLB01_DETAIL TYPE STANDARD TABLE OF J_1BLB01_DETAIL,
      WA_J_1BLB01_DETAIL TYPE J_1BLB01_DETAIL,
      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_1BLB01_DETAIL> TYPE J_1BLB01_DETAIL.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_1BLB01_DETAIL.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_1BLB01_DETAIL
  INTO TABLE IT_J_1BLB01_DETAIL.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_1BLB01_DETAIL
*  INTO TABLE @DATA(IT_J_1BLB01_DETAIL2).
*--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_1BLB01_DETAIL INDEX 1 INTO DATA(WA_J_1BLB01_DETAIL2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_1BLB01_DETAIL ASSIGNING <J_1BLB01_DETAIL>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_1BLB01_DETAIL>-PSTDAT = 1.
<J_1BLB01_DETAIL>-SPECIES = 1.
<J_1BLB01_DETAIL>-SERIES = 1.
<J_1BLB01_DETAIL>-SUBSER = 1.
<J_1BLB01_DETAIL>-NFNUM = 1.

ENDLOOP.

LOOP AT IT_J_1BLB01_DETAIL INTO WA_J_1BLB01_DETAIL.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_1BLB01_DETAIL-NFENUM, sy-vline,
  WA_J_1BLB01_DETAIL-DOCDAT, sy-vline,
  WA_J_1BLB01_DETAIL-PARID, sy-vline,
  WA_J_1BLB01_DETAIL-REGIO, sy-vline,
  WA_J_1BLB01_DETAIL-NFTOT, sy-vline,
  WA_J_1BLB01_DETAIL-CFOP_NOEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_1BLB01_DETAIL 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_1BLB01_DETAIL 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_1BLB01_DETAIL INTO WA_J_1BLB01_DETAIL.


*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 PARID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_1BLB01_DETAIL-PARID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1BLB01_DETAIL-PARID.
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_1BLB01_DETAIL_STR, 
PSTDAT TYPE STRING,
SPECIES TYPE STRING,
SERIES TYPE STRING,
SUBSER TYPE STRING,
NFNUM TYPE STRING,
NFENUM TYPE STRING,
DOCDAT TYPE STRING,
PARID TYPE STRING,
REGIO TYPE STRING,
NFTOT TYPE STRING,
CFOP_NOEXT TYPE STRING,
TAXGRP TYPE STRING,
CODIGO TYPE STRING,
BASE TYPE STRING,
RATE TYPE STRING,
TAXVAL TYPE STRING,
OBS TYPE STRING,
ORDER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_1BLB01_DETAIL_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_1BLB01_DETAIL_STR-PSTDAT sy-vline 
WA_J_1BLB01_DETAIL_STR-SPECIES sy-vline 
WA_J_1BLB01_DETAIL_STR-SERIES sy-vline 
WA_J_1BLB01_DETAIL_STR-SUBSER sy-vline 
WA_J_1BLB01_DETAIL_STR-NFNUM sy-vline 
WA_J_1BLB01_DETAIL_STR-NFENUM sy-vline 
WA_J_1BLB01_DETAIL_STR-DOCDAT sy-vline 
WA_J_1BLB01_DETAIL_STR-PARID sy-vline 
WA_J_1BLB01_DETAIL_STR-REGIO sy-vline 
WA_J_1BLB01_DETAIL_STR-NFTOT sy-vline 
WA_J_1BLB01_DETAIL_STR-CFOP_NOEXT sy-vline 
WA_J_1BLB01_DETAIL_STR-TAXGRP sy-vline 
WA_J_1BLB01_DETAIL_STR-CODIGO sy-vline 
WA_J_1BLB01_DETAIL_STR-BASE sy-vline 
WA_J_1BLB01_DETAIL_STR-RATE sy-vline 
WA_J_1BLB01_DETAIL_STR-TAXVAL sy-vline 
WA_J_1BLB01_DETAIL_STR-OBS sy-vline 
WA_J_1BLB01_DETAIL_STR-ORDER sy-vline      INTO ld_text SEPARATED BY SPACE.

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