ABAP Select data from SAP table J_2GLPLEGDOC into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_2GLPLEGDOC 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_2GLPLEGDOC. 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_2GLPLEGDOC 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_2GLPLEGDOC TYPE STANDARD TABLE OF J_2GLPLEGDOC,
      WA_J_2GLPLEGDOC TYPE J_2GLPLEGDOC,
      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_2GLPLEGDOC> TYPE J_2GLPLEGDOC.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_2GLPLEGDOC.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_2GLPLEGDOC
  INTO TABLE IT_J_2GLPLEGDOC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_2GLPLEGDOC
*  INTO TABLE @DATA(IT_J_2GLPLEGDOC2).
*--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_2GLPLEGDOC INDEX 1 INTO DATA(WA_J_2GLPLEGDOC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_2GLPLEGDOC ASSIGNING <J_2GLPLEGDOC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_2GLPLEGDOC>-MANDT = 1.
<J_2GLPLEGDOC>-DOCUCATEG = 1.
<J_2GLPLEGDOC>-SAPDOC = 1.
<J_2GLPLEGDOC>-GJAHR = 1.
<J_2GLPLEGDOC>-GIDOC = 1.

ENDLOOP.

LOOP AT IT_J_2GLPLEGDOC INTO WA_J_2GLPLEGDOC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_2GLPLEGDOC-POSTDATE, sy-vline,
  WA_J_2GLPLEGDOC-BUKRS, sy-vline,
  WA_J_2GLPLEGDOC-PRNTSK, sy-vline,
  WA_J_2GLPLEGDOC-LOGKIND, sy-vline,
  WA_J_2GLPLEGDOC-LEGALDOC, sy-vline,
  WA_J_2GLPLEGDOC-XBLNRUPDT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_2GLPLEGDOC 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_2GLPLEGDOC 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_2GLPLEGDOC INTO WA_J_2GLPLEGDOC.


*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 SAPDOC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_2GLPLEGDOC-SAPDOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_2GLPLEGDOC-SAPDOC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_2GLPLEGDOC-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_2GLPLEGDOC-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GIDOC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_2GLPLEGDOC-GIDOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_2GLPLEGDOC-GIDOC.
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_2GLPLEGDOC_STR, 
MANDT TYPE STRING,
DOCUCATEG TYPE STRING,
SAPDOC TYPE STRING,
GJAHR TYPE STRING,
GIDOC TYPE STRING,
POSTDATE TYPE STRING,
BUKRS TYPE STRING,
PRNTSK TYPE STRING,
LOGKIND TYPE STRING,
LEGALDOC TYPE STRING,
XBLNRUPDT TYPE STRING,
PRUSER TYPE STRING,
PRDATE TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
STEXT TYPE STRING,
SERIES TYPE STRING,
NUMBR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_2GLPLEGDOC_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_2GLPLEGDOC_STR-MANDT sy-vline 
WA_J_2GLPLEGDOC_STR-DOCUCATEG sy-vline 
WA_J_2GLPLEGDOC_STR-SAPDOC sy-vline 
WA_J_2GLPLEGDOC_STR-GJAHR sy-vline 
WA_J_2GLPLEGDOC_STR-GIDOC sy-vline 
WA_J_2GLPLEGDOC_STR-POSTDATE sy-vline 
WA_J_2GLPLEGDOC_STR-BUKRS sy-vline 
WA_J_2GLPLEGDOC_STR-PRNTSK sy-vline 
WA_J_2GLPLEGDOC_STR-LOGKIND sy-vline 
WA_J_2GLPLEGDOC_STR-LEGALDOC sy-vline 
WA_J_2GLPLEGDOC_STR-XBLNRUPDT sy-vline 
WA_J_2GLPLEGDOC_STR-PRUSER sy-vline 
WA_J_2GLPLEGDOC_STR-PRDATE sy-vline 
WA_J_2GLPLEGDOC_STR-ERNAM sy-vline 
WA_J_2GLPLEGDOC_STR-ERDAT sy-vline 
WA_J_2GLPLEGDOC_STR-STEXT sy-vline 
WA_J_2GLPLEGDOC_STR-SERIES sy-vline 
WA_J_2GLPLEGDOC_STR-NUMBR sy-vline      INTO ld_text SEPARATED BY SPACE.

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