ABAP Select data from SAP table J_2GLPLP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_2GLPLP 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_2GLPLP. 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_2GLPLP 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_2GLPLP TYPE STANDARD TABLE OF J_2GLPLP,
      WA_J_2GLPLP TYPE J_2GLPLP,
      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_2GLPLP> TYPE J_2GLPLP.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_2GLPLP.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_2GLPLP
  INTO TABLE IT_J_2GLPLP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_2GLPLP
*  INTO TABLE @DATA(IT_J_2GLPLP2).
*--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_2GLPLP INDEX 1 INTO DATA(WA_J_2GLPLP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_2GLPLP ASSIGNING <J_2GLPLP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_2GLPLP>-MANDT = 1.
<J_2GLPLP>-LOGPAPER = 1.
<J_2GLPLP>-PATH = 1.
<J_2GLPLP>-ROUTINES = 1.
<J_2GLPLP>-BWARTS = 1.

ENDLOOP.

LOOP AT IT_J_2GLPLP INTO WA_J_2GLPLP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_2GLPLP-BLARTS, sy-vline,
  WA_J_2GLPLP-VGARTS, sy-vline,
  WA_J_2GLPLP-AUARTS, sy-vline,
  WA_J_2GLPLP-FKARTS, sy-vline,
  WA_J_2GLPLP-LFARTS, sy-vline,
  WA_J_2GLPLP-GITYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_2GLPLP 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_2GLPLP 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_2GLPLP INTO WA_J_2GLPLP.


*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_J_2GLPLP_STR, 
MANDT TYPE STRING,
LOGPAPER TYPE STRING,
PATH TYPE STRING,
ROUTINES TYPE STRING,
BWARTS TYPE STRING,
BLARTS TYPE STRING,
VGARTS TYPE STRING,
AUARTS TYPE STRING,
FKARTS TYPE STRING,
LFARTS TYPE STRING,
GITYPE TYPE STRING,
WLFARTS TYPE STRING,
LINE_ITEMS TYPE STRING,
CLEARED TYPE STRING,
TAXES TYPE STRING,
PARTNER TYPE STRING,
FI_MODULE TYPE STRING,
PRIORITY TYPE STRING,
COA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_2GLPLP_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_2GLPLP_STR-MANDT sy-vline 
WA_J_2GLPLP_STR-LOGPAPER sy-vline 
WA_J_2GLPLP_STR-PATH sy-vline 
WA_J_2GLPLP_STR-ROUTINES sy-vline 
WA_J_2GLPLP_STR-BWARTS sy-vline 
WA_J_2GLPLP_STR-BLARTS sy-vline 
WA_J_2GLPLP_STR-VGARTS sy-vline 
WA_J_2GLPLP_STR-AUARTS sy-vline 
WA_J_2GLPLP_STR-FKARTS sy-vline 
WA_J_2GLPLP_STR-LFARTS sy-vline 
WA_J_2GLPLP_STR-GITYPE sy-vline 
WA_J_2GLPLP_STR-WLFARTS sy-vline 
WA_J_2GLPLP_STR-LINE_ITEMS sy-vline 
WA_J_2GLPLP_STR-CLEARED sy-vline 
WA_J_2GLPLP_STR-TAXES sy-vline 
WA_J_2GLPLP_STR-PARTNER sy-vline 
WA_J_2GLPLP_STR-FI_MODULE sy-vline 
WA_J_2GLPLP_STR-PRIORITY sy-vline 
WA_J_2GLPLP_STR-COA sy-vline      INTO ld_text SEPARATED BY SPACE.

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