ABAP Select data from SAP table J_2GLPLEGSIG into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_2GLPLEGSIG 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_2GLPLEGSIG. 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_2GLPLEGSIG 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_2GLPLEGSIG TYPE STANDARD TABLE OF J_2GLPLEGSIG,
      WA_J_2GLPLEGSIG TYPE J_2GLPLEGSIG,
      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_2GLPLEGSIG> TYPE J_2GLPLEGSIG.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_2GLPLEGSIG.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_2GLPLEGSIG
  INTO TABLE IT_J_2GLPLEGSIG.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_2GLPLEGSIG
*  INTO TABLE @DATA(IT_J_2GLPLEGSIG2).
*--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_2GLPLEGSIG INDEX 1 INTO DATA(WA_J_2GLPLEGSIG2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_2GLPLEGSIG ASSIGNING <J_2GLPLEGSIG>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_2GLPLEGSIG>-MANDT = 1.
<J_2GLPLEGSIG>-DOCUCATEG = 1.
<J_2GLPLEGSIG>-SAPDOC = 1.
<J_2GLPLEGSIG>-GJAHR = 1.
<J_2GLPLEGSIG>-GIDOC = 1.

ENDLOOP.

LOOP AT IT_J_2GLPLEGSIG INTO WA_J_2GLPLEGSIG.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_2GLPLEGSIG-DEVID, sy-vline,
  WA_J_2GLPLEGSIG-CRDAT, sy-vline,
  WA_J_2GLPLEGSIG-AEDAT, sy-vline,
  WA_J_2GLPLEGSIG-AENAM, sy-vline,
  WA_J_2GLPLEGSIG-STAT1, sy-vline,
  WA_J_2GLPLEGSIG-DSIG1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_2GLPLEGSIG 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_2GLPLEGSIG 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_2GLPLEGSIG INTO WA_J_2GLPLEGSIG.


*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_2GLPLEGSIG-SAPDOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_2GLPLEGSIG-SAPDOC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_2GLPLEGSIG-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_2GLPLEGSIG-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GIDOC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_2GLPLEGSIG-GIDOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_2GLPLEGSIG-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_2GLPLEGSIG_STR, 
MANDT TYPE STRING,
DOCUCATEG TYPE STRING,
SAPDOC TYPE STRING,
GJAHR TYPE STRING,
GIDOC TYPE STRING,
DEVID TYPE STRING,
CRDAT TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
STAT1 TYPE STRING,
DSIG1 TYPE STRING,
NXTZ1 TYPE STRING,
STAT2 TYPE STRING,
DSIG2 TYPE STRING,
NXTZ2 TYPE STRING,
STAT3 TYPE STRING,
DSIG3 TYPE STRING,
NXTZ3 TYPE STRING,
STAT4 TYPE STRING,
DSIG4 TYPE STRING,
NXTZ4 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_2GLPLEGSIG_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_2GLPLEGSIG_STR-MANDT sy-vline 
WA_J_2GLPLEGSIG_STR-DOCUCATEG sy-vline 
WA_J_2GLPLEGSIG_STR-SAPDOC sy-vline 
WA_J_2GLPLEGSIG_STR-GJAHR sy-vline 
WA_J_2GLPLEGSIG_STR-GIDOC sy-vline 
WA_J_2GLPLEGSIG_STR-DEVID sy-vline 
WA_J_2GLPLEGSIG_STR-CRDAT sy-vline 
WA_J_2GLPLEGSIG_STR-AEDAT sy-vline 
WA_J_2GLPLEGSIG_STR-AENAM sy-vline 
WA_J_2GLPLEGSIG_STR-STAT1 sy-vline 
WA_J_2GLPLEGSIG_STR-DSIG1 sy-vline 
WA_J_2GLPLEGSIG_STR-NXTZ1 sy-vline 
WA_J_2GLPLEGSIG_STR-STAT2 sy-vline 
WA_J_2GLPLEGSIG_STR-DSIG2 sy-vline 
WA_J_2GLPLEGSIG_STR-NXTZ2 sy-vline 
WA_J_2GLPLEGSIG_STR-STAT3 sy-vline 
WA_J_2GLPLEGSIG_STR-DSIG3 sy-vline 
WA_J_2GLPLEGSIG_STR-NXTZ3 sy-vline 
WA_J_2GLPLEGSIG_STR-STAT4 sy-vline 
WA_J_2GLPLEGSIG_STR-DSIG4 sy-vline 
WA_J_2GLPLEGSIG_STR-NXTZ4 sy-vline      INTO ld_text SEPARATED BY SPACE.

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