ABAP Select data from SAP table GLB2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP GLB2 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 GLB2. 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 GLB2 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_GLB2 TYPE STANDARD TABLE OF GLB2,
      WA_GLB2 TYPE GLB2,
      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: <GLB2> TYPE GLB2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_GLB2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM GLB2
  INTO TABLE IT_GLB2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GLB2
*  INTO TABLE @DATA(IT_GLB22).
*--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_GLB2 INDEX 1 INTO DATA(WA_GLB22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_GLB2 ASSIGNING <GLB2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GLB2>-RVERS = 1.
<GLB2>-RCOMP = 1.
<GLB2>-RYEAR = 1.
<GLB2>-RACCT = 1.
<GLB2>-RBUSA = 1.

ENDLOOP.

LOOP AT IT_GLB2 INTO WA_GLB2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GLB2-RLEVL, sy-vline,
  WA_GLB2-DOCTY, sy-vline,
  WA_GLB2-RSUBD, sy-vline,
  WA_GLB2-RMVCT, sy-vline,
  WA_GLB2-RASSC, sy-vline,
  WA_GLB2-SBUSA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GLB2 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_GLB2 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_GLB2 INTO WA_GLB2.


*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 RVERS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GLB2-RVERS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLB2-RVERS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RCOMP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GLB2-RCOMP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLB2-RCOMP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field RYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_GLB2-RYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLB2-RYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RACCT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GLB2-RACCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLB2-RACCT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RASSC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GLB2-RASSC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLB2-RASSC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field RYACQ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_GLB2-RYACQ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLB2-RYACQ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field QUANUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_GLB2-QUANUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLB2-QUANUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI7, internal->external for field FISCPER
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_GLB2-FISCPER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLB2-FISCPER.
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_GLB2_STR, 
RVERS TYPE STRING,
RCOMP TYPE STRING,
RYEAR TYPE STRING,
RACCT TYPE STRING,
RBUSA TYPE STRING,
RLEVL TYPE STRING,
DOCTY TYPE STRING,
RSUBD TYPE STRING,
RMVCT TYPE STRING,
RASSC TYPE STRING,
SBUSA TYPE STRING,
RYACQ TYPE STRING,
RPACQ TYPE STRING,
OCLNT TYPE STRING,
OBUKR TYPE STRING,
RTCUR TYPE STRING,
UPDHP TYPE STRING,
QUANUNIT TYPE STRING,
VALUETYPE TYPE STRING,
CURTYPE TYPE STRING,
FISCPER TYPE STRING,
FISCVAR TYPE STRING,
CHARTACCTS TYPE STRING,
VALUTYP TYPE STRING,
CURRUNIT TYPE STRING,
BALANCE TYPE STRING,
DEBIT TYPE STRING,
CREDIT TYPE STRING,
TURNOVER TYPE STRING,
QUANTITY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GLB2_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_GLB2_STR-RVERS sy-vline 
WA_GLB2_STR-RCOMP sy-vline 
WA_GLB2_STR-RYEAR sy-vline 
WA_GLB2_STR-RACCT sy-vline 
WA_GLB2_STR-RBUSA sy-vline 
WA_GLB2_STR-RLEVL sy-vline 
WA_GLB2_STR-DOCTY sy-vline 
WA_GLB2_STR-RSUBD sy-vline 
WA_GLB2_STR-RMVCT sy-vline 
WA_GLB2_STR-RASSC sy-vline 
WA_GLB2_STR-SBUSA sy-vline 
WA_GLB2_STR-RYACQ sy-vline 
WA_GLB2_STR-RPACQ sy-vline 
WA_GLB2_STR-OCLNT sy-vline 
WA_GLB2_STR-OBUKR sy-vline 
WA_GLB2_STR-RTCUR sy-vline 
WA_GLB2_STR-UPDHP sy-vline 
WA_GLB2_STR-QUANUNIT sy-vline 
WA_GLB2_STR-VALUETYPE sy-vline 
WA_GLB2_STR-CURTYPE sy-vline 
WA_GLB2_STR-FISCPER sy-vline 
WA_GLB2_STR-FISCVAR sy-vline 
WA_GLB2_STR-CHARTACCTS sy-vline 
WA_GLB2_STR-VALUTYP sy-vline 
WA_GLB2_STR-CURRUNIT sy-vline 
WA_GLB2_STR-BALANCE sy-vline 
WA_GLB2_STR-DEBIT sy-vline 
WA_GLB2_STR-CREDIT sy-vline 
WA_GLB2_STR-TURNOVER sy-vline 
WA_GLB2_STR-QUANTITY sy-vline      INTO ld_text SEPARATED BY SPACE.

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