ABAP Select data from SAP table FAC_DZMATHGD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FAC_DZMATHGD
*  INTO TABLE @DATA(IT_FAC_DZMATHGD2).
*--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_FAC_DZMATHGD INDEX 1 INTO DATA(WA_FAC_DZMATHGD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FAC_DZMATHGD>-MANDT = 1.
<FAC_DZMATHGD>-COMPANYCODE = 1.
<FAC_DZMATHGD>-MATERIAL = 1.
<FAC_DZMATHGD>-CHANGEDOCOBJECT = 1.
<FAC_DZMATHGD>-CHANGEDOCUMENT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FAC_DZMATHGD-CHANGEDOCDATABASETABLEFIELD, sy-vline,
  WA_FAC_DZMATHGD-CHANGEDOCITEMCHANGETYPE, sy-vline,
  WA_FAC_DZMATHGD-CHANGEDOCOBJECTCLASS, sy-vline,
  WA_FAC_DZMATHGD-DATABASETABLE, sy-vline,
  WA_FAC_DZMATHGD-CHANGEDOCTABLEKEY, sy-vline,
  WA_FAC_DZMATHGD-CHANGEDOCITEMCHANGETYPETEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FAC_DZMATHGD 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_FAC_DZMATHGD 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_FAC_DZMATHGD INTO WA_FAC_DZMATHGD.


*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 MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_FAC_DZMATHGD-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FAC_DZMATHGD-MATERIAL.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ISOLA, internal->external for field CHANGEDOCLANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_FAC_DZMATHGD-CHANGEDOCLANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FAC_DZMATHGD-CHANGEDOCLANGUAGE.
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_FAC_DZMATHGD_STR, 
MANDT TYPE STRING,
COMPANYCODE TYPE STRING,
MATERIAL TYPE STRING,
CHANGEDOCOBJECT TYPE STRING,
CHANGEDOCUMENT TYPE STRING,
CHANGEDOCDATABASETABLEFIELD TYPE STRING,
CHANGEDOCITEMCHANGETYPE TYPE STRING,
CHANGEDOCOBJECTCLASS TYPE STRING,
DATABASETABLE TYPE STRING,
CHANGEDOCTABLEKEY TYPE STRING,
CHANGEDOCITEMCHANGETYPETEXT TYPE STRING,
DATABASETABLETEXT TYPE STRING,
TEXT TYPE STRING,
CHANGEDOCPREVIOUSUNIT TYPE STRING,
CHANGEDOCNEWUNIT TYPE STRING,
CHANGEDOCPREVIOUSCURRENCY TYPE STRING,
CHANGEDOCNEWCURRENCY TYPE STRING,
CHANGEDOCNEWFIELDVALUE TYPE STRING,
CHANGEDOCPREVIOUSFIELDVALUE TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATE TYPE STRING,
CREATIONTIME TYPE STRING,
CHANGEDOCLANGUAGE TYPE STRING,
LANGUAGENAME TYPE STRING,
CHANGEDOCTEXTISCHANGED TYPE STRING,
OUTPUTLENGTH TYPE STRING,
FISCALYEARVARIANT TYPE STRING,
SYSTEMCLIENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FAC_DZMATHGD_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_FAC_DZMATHGD_STR-MANDT sy-vline 
WA_FAC_DZMATHGD_STR-COMPANYCODE sy-vline 
WA_FAC_DZMATHGD_STR-MATERIAL sy-vline 
WA_FAC_DZMATHGD_STR-CHANGEDOCOBJECT sy-vline 
WA_FAC_DZMATHGD_STR-CHANGEDOCUMENT sy-vline 
WA_FAC_DZMATHGD_STR-CHANGEDOCDATABASETABLEFIELD sy-vline 
WA_FAC_DZMATHGD_STR-CHANGEDOCITEMCHANGETYPE sy-vline 
WA_FAC_DZMATHGD_STR-CHANGEDOCOBJECTCLASS sy-vline 
WA_FAC_DZMATHGD_STR-DATABASETABLE sy-vline 
WA_FAC_DZMATHGD_STR-CHANGEDOCTABLEKEY sy-vline 
WA_FAC_DZMATHGD_STR-CHANGEDOCITEMCHANGETYPETEXT sy-vline 
WA_FAC_DZMATHGD_STR-DATABASETABLETEXT sy-vline 
WA_FAC_DZMATHGD_STR-TEXT sy-vline 
WA_FAC_DZMATHGD_STR-CHANGEDOCPREVIOUSUNIT sy-vline 
WA_FAC_DZMATHGD_STR-CHANGEDOCNEWUNIT sy-vline 
WA_FAC_DZMATHGD_STR-CHANGEDOCPREVIOUSCURRENCY sy-vline 
WA_FAC_DZMATHGD_STR-CHANGEDOCNEWCURRENCY sy-vline 
WA_FAC_DZMATHGD_STR-CHANGEDOCNEWFIELDVALUE sy-vline 
WA_FAC_DZMATHGD_STR-CHANGEDOCPREVIOUSFIELDVALUE sy-vline 
WA_FAC_DZMATHGD_STR-CREATEDBYUSER sy-vline 
WA_FAC_DZMATHGD_STR-CREATIONDATE sy-vline 
WA_FAC_DZMATHGD_STR-CREATIONTIME sy-vline 
WA_FAC_DZMATHGD_STR-CHANGEDOCLANGUAGE sy-vline 
WA_FAC_DZMATHGD_STR-LANGUAGENAME sy-vline 
WA_FAC_DZMATHGD_STR-CHANGEDOCTEXTISCHANGED sy-vline 
WA_FAC_DZMATHGD_STR-OUTPUTLENGTH sy-vline 
WA_FAC_DZMATHGD_STR-FISCALYEARVARIANT sy-vline 
WA_FAC_DZMATHGD_STR-SYSTEMCLIENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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