ABAP Select data from SAP table GLS3 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 GLS3 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 GLS3. 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 GLS3 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_GLS3 TYPE STANDARD TABLE OF GLS3,
      WA_GLS3 TYPE GLS3,
      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: <GLS3> TYPE GLS3.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_GLS3.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM GLS3
  INTO TABLE IT_GLS3.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GLS3
*  INTO TABLE @DATA(IT_GLS32).
*--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_GLS3 INDEX 1 INTO DATA(WA_GLS32).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_GLS3 ASSIGNING <GLS3>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GLS3>-RCLNT = 1.
<GLS3>-RLDNR = 1.
<GLS3>-RRCTY = 1.
<GLS3>-RVERS = 1.
<GLS3>-BUKRS = 1.

ENDLOOP.

LOOP AT IT_GLS3 INTO WA_GLS3.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GLS3-RYEAR, sy-vline,
  WA_GLS3-RACCT, sy-vline,
  WA_GLS3-RBUSA, sy-vline,
  WA_GLS3-RMVCT, sy-vline,
  WA_GLS3-RASSC, sy-vline,
  WA_GLS3-SBUSA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GLS3 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_GLS3 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_GLS3 INTO WA_GLS3.


*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 RLDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GLS3-RLDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLS3-RLDNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RVERS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GLS3-RVERS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLS3-RVERS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field RYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_GLS3-RYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLS3-RYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RACCT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GLS3-RACCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLS3-RACCT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RASSC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GLS3-RASSC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLS3-RASSC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field RYACQ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_GLS3-RYACQ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLS3-RYACQ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOCNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GLS3-DOCNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLS3-DOCNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field TSL
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_GLS3-TSL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLS3-TSL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field HSL
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_GLS3-HSL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLS3-HSL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field KSL
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_GLS3-KSL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLS3-KSL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field AUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_GLS3-AUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLS3-AUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REFDOCNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GLS3-REFDOCNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLS3-REFDOCNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field REFRYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_GLS3-REFRYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLS3-REFRYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GLS3-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLS3-LOGSYS.
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_GLS3_STR, 
RCLNT TYPE STRING,
RLDNR TYPE STRING,
RRCTY TYPE STRING,
RVERS TYPE STRING,
BUKRS TYPE STRING,
RYEAR TYPE STRING,
RACCT TYPE STRING,
RBUSA TYPE STRING,
RMVCT TYPE STRING,
RASSC TYPE STRING,
SBUSA TYPE STRING,
RYACQ TYPE STRING,
RPACQ TYPE STRING,
RTCUR TYPE STRING,
DRCRK TYPE STRING,
POPER TYPE STRING,
DOCCT TYPE STRING,
DOCNR TYPE STRING,
DOCLN TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
USNAM TYPE STRING,
TSL TYPE STRING,
HSL TYPE STRING,
KSL TYPE STRING,
AUNIT TYPE STRING,
SGTXT TYPE STRING,
AUTOM TYPE STRING,
DOCTY TYPE STRING,
ACTIV TYPE STRING,
BVORG TYPE STRING,
REFDOCNR TYPE STRING,
REFRYEAR TYPE STRING,
REFDOCLN TYPE STRING,
REFDOCCT TYPE STRING,
REFACTIV TYPE STRING,
AWTYP TYPE STRING,
AWORG TYPE STRING,
LOGSYS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GLS3_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_GLS3_STR-RCLNT sy-vline 
WA_GLS3_STR-RLDNR sy-vline 
WA_GLS3_STR-RRCTY sy-vline 
WA_GLS3_STR-RVERS sy-vline 
WA_GLS3_STR-BUKRS sy-vline 
WA_GLS3_STR-RYEAR sy-vline 
WA_GLS3_STR-RACCT sy-vline 
WA_GLS3_STR-RBUSA sy-vline 
WA_GLS3_STR-RMVCT sy-vline 
WA_GLS3_STR-RASSC sy-vline 
WA_GLS3_STR-SBUSA sy-vline 
WA_GLS3_STR-RYACQ sy-vline 
WA_GLS3_STR-RPACQ sy-vline 
WA_GLS3_STR-RTCUR sy-vline 
WA_GLS3_STR-DRCRK sy-vline 
WA_GLS3_STR-POPER sy-vline 
WA_GLS3_STR-DOCCT sy-vline 
WA_GLS3_STR-DOCNR sy-vline 
WA_GLS3_STR-DOCLN sy-vline 
WA_GLS3_STR-CPUDT sy-vline 
WA_GLS3_STR-CPUTM sy-vline 
WA_GLS3_STR-USNAM sy-vline 
WA_GLS3_STR-TSL sy-vline 
WA_GLS3_STR-HSL sy-vline 
WA_GLS3_STR-KSL sy-vline 
WA_GLS3_STR-AUNIT sy-vline 
WA_GLS3_STR-SGTXT sy-vline 
WA_GLS3_STR-AUTOM sy-vline 
WA_GLS3_STR-DOCTY sy-vline 
WA_GLS3_STR-ACTIV sy-vline 
WA_GLS3_STR-BVORG sy-vline 
WA_GLS3_STR-REFDOCNR sy-vline 
WA_GLS3_STR-REFRYEAR sy-vline 
WA_GLS3_STR-REFDOCLN sy-vline 
WA_GLS3_STR-REFDOCCT sy-vline 
WA_GLS3_STR-REFACTIV sy-vline 
WA_GLS3_STR-AWTYP sy-vline 
WA_GLS3_STR-AWORG sy-vline 
WA_GLS3_STR-LOGSYS sy-vline      INTO ld_text SEPARATED BY SPACE.

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