ABAP Select data from SAP table GPLS into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP GPLS 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 GPLS. 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 GPLS 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_GPLS TYPE STANDARD TABLE OF GPLS,
      WA_GPLS TYPE GPLS,
      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: <GPLS> TYPE GPLS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GPLS
*  INTO TABLE @DATA(IT_GPLS2).
*--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_GPLS INDEX 1 INTO DATA(WA_GPLS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GPLS>-CNT = 1.
<GPLS>-LS01 = 1.
<GPLS>-LS02 = 1.
<GPLS>-LS03 = 1.
<GPLS>-LS04 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GPLS-LS05, sy-vline,
  WA_GPLS-LS06, sy-vline,
  WA_GPLS-LS07, sy-vline,
  WA_GPLS-LS08, sy-vline,
  WA_GPLS-LS09, sy-vline,
  WA_GPLS-LS10, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GPLS 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_GPLS 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_GPLS INTO WA_GPLS.


*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 LS01
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GPLS-LS01
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GPLS-LS01.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LS02
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GPLS-LS02
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GPLS-LS02.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LS03
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GPLS-LS03
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GPLS-LS03.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LS04
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GPLS-LS04
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GPLS-LS04.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LS05
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GPLS-LS05
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GPLS-LS05.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LS06
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GPLS-LS06
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GPLS-LS06.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LS07
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GPLS-LS07
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GPLS-LS07.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LS08
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GPLS-LS08
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GPLS-LS08.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LS09
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GPLS-LS09
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GPLS-LS09.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LS10
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GPLS-LS10
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GPLS-LS10.
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_GPLS_STR, 
CNT TYPE STRING,
LS01 TYPE STRING,
LS02 TYPE STRING,
LS03 TYPE STRING,
LS04 TYPE STRING,
LS05 TYPE STRING,
LS06 TYPE STRING,
LS07 TYPE STRING,
LS08 TYPE STRING,
LS09 TYPE STRING,
LS10 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GPLS_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_GPLS_STR-CNT sy-vline 
WA_GPLS_STR-LS01 sy-vline 
WA_GPLS_STR-LS02 sy-vline 
WA_GPLS_STR-LS03 sy-vline 
WA_GPLS_STR-LS04 sy-vline 
WA_GPLS_STR-LS05 sy-vline 
WA_GPLS_STR-LS06 sy-vline 
WA_GPLS_STR-LS07 sy-vline 
WA_GPLS_STR-LS08 sy-vline 
WA_GPLS_STR-LS09 sy-vline 
WA_GPLS_STR-LS10 sy-vline      INTO ld_text SEPARATED BY SPACE.

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