ABAP Select data from SAP table MC46GT1GEN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MC46GT1GEN 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 MC46GT1GEN. 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 MC46GT1GEN 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_MC46GT1GEN TYPE STANDARD TABLE OF MC46GT1GEN,
      WA_MC46GT1GEN TYPE MC46GT1GEN,
      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: <MC46GT1GEN> TYPE MC46GT1GEN.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MC46GT1GEN.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MC46GT1GEN
  INTO TABLE IT_MC46GT1GEN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MC46GT1GEN
*  INTO TABLE @DATA(IT_MC46GT1GEN2).
*--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_MC46GT1GEN INDEX 1 INTO DATA(WA_MC46GT1GEN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MC46GT1GEN ASSIGNING <MC46GT1GEN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MC46GT1GEN>-CHARG = 1.
<MC46GT1GEN>-DOCUMENT = 1.
<MC46GT1GEN>-DOC_CURR = 1.
<MC46GT1GEN>-DOC_TYPE = 1.
<MC46GT1GEN>-EXCH_RATE = 1.

ENDLOOP.

LOOP AT IT_MC46GT1GEN INTO WA_MC46GT1GEN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MC46GT1GEN-EXP_FREIGHT, sy-vline,
  WA_MC46GT1GEN-EXP_INSURANCE, sy-vline,
  WA_MC46GT1GEN-EXP_NRP, sy-vline,
  WA_MC46GT1GEN-EXP_NRS, sy-vline,
  WA_MC46GT1GEN-EXP_OTHERS, sy-vline,
  WA_MC46GT1GEN-EXP_OTHERS_REC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MC46GT1GEN 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_MC46GT1GEN 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_MC46GT1GEN INTO WA_MC46GT1GEN.


*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 DOCUMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC46GT1GEN-DOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC46GT1GEN-DOCUMENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field EXCH_RATE
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_MC46GT1GEN-EXCH_RATE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC46GT1GEN-EXCH_RATE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MC46GT1GEN-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC46GT1GEN-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRED_DOCUMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC46GT1GEN-PRED_DOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC46GT1GEN-PRED_DOCUMENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TKONN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC46GT1GEN-TKONN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC46GT1GEN-TKONN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UNIT_BUOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MC46GT1GEN-UNIT_BUOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC46GT1GEN-UNIT_BUOM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UNIT_DOC
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MC46GT1GEN-UNIT_DOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC46GT1GEN-UNIT_DOC.
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_MC46GT1GEN_STR, 
CHARG TYPE STRING,
DOCUMENT TYPE STRING,
DOC_CURR TYPE STRING,
DOC_TYPE TYPE STRING,
EXCH_RATE TYPE STRING,
EXP_FREIGHT TYPE STRING,
EXP_INSURANCE TYPE STRING,
EXP_NRP TYPE STRING,
EXP_NRS TYPE STRING,
EXP_OTHERS TYPE STRING,
EXP_OTHERS_REC TYPE STRING,
EXP_PLANNED TYPE STRING,
EXP_RP TYPE STRING,
EXP_RS TYPE STRING,
ITEM TYPE STRING,
ITEM_BUOM TYPE STRING,
ITEM_QUAN TYPE STRING,
LGORT TYPE STRING,
LOCAL_CURR TYPE STRING,
MATKL TYPE STRING,
MATNR TYPE STRING,
MWSBP TYPE STRING,
NETPR TYPE STRING,
NETWR TYPE STRING,
PRED_DOCUMENT TYPE STRING,
PRED_DOC_TYPE TYPE STRING,
PRED_ITEM TYPE STRING,
PRED_SUB_ITEM TYPE STRING,
SIDE TYPE STRING,
SUB_ITEM TYPE STRING,
TAX_VAL TYPE STRING,
TKONN TYPE STRING,
TPOSN TYPE STRING,
TPOSN_SUB TYPE STRING,
UMN TYPE STRING,
UMZ TYPE STRING,
UNIT_BUOM TYPE STRING,
UNIT_DOC TYPE STRING,
VALUE TYPE STRING,
VAL_TYPE TYPE STRING,
WERKS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MC46GT1GEN_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_MC46GT1GEN_STR-CHARG sy-vline 
WA_MC46GT1GEN_STR-DOCUMENT sy-vline 
WA_MC46GT1GEN_STR-DOC_CURR sy-vline 
WA_MC46GT1GEN_STR-DOC_TYPE sy-vline 
WA_MC46GT1GEN_STR-EXCH_RATE sy-vline 
WA_MC46GT1GEN_STR-EXP_FREIGHT sy-vline 
WA_MC46GT1GEN_STR-EXP_INSURANCE sy-vline 
WA_MC46GT1GEN_STR-EXP_NRP sy-vline 
WA_MC46GT1GEN_STR-EXP_NRS sy-vline 
WA_MC46GT1GEN_STR-EXP_OTHERS sy-vline 
WA_MC46GT1GEN_STR-EXP_OTHERS_REC sy-vline 
WA_MC46GT1GEN_STR-EXP_PLANNED sy-vline 
WA_MC46GT1GEN_STR-EXP_RP sy-vline 
WA_MC46GT1GEN_STR-EXP_RS sy-vline 
WA_MC46GT1GEN_STR-ITEM sy-vline 
WA_MC46GT1GEN_STR-ITEM_BUOM sy-vline 
WA_MC46GT1GEN_STR-ITEM_QUAN sy-vline 
WA_MC46GT1GEN_STR-LGORT sy-vline 
WA_MC46GT1GEN_STR-LOCAL_CURR sy-vline 
WA_MC46GT1GEN_STR-MATKL sy-vline 
WA_MC46GT1GEN_STR-MATNR sy-vline 
WA_MC46GT1GEN_STR-MWSBP sy-vline 
WA_MC46GT1GEN_STR-NETPR sy-vline 
WA_MC46GT1GEN_STR-NETWR sy-vline 
WA_MC46GT1GEN_STR-PRED_DOCUMENT sy-vline 
WA_MC46GT1GEN_STR-PRED_DOC_TYPE sy-vline 
WA_MC46GT1GEN_STR-PRED_ITEM sy-vline 
WA_MC46GT1GEN_STR-PRED_SUB_ITEM sy-vline 
WA_MC46GT1GEN_STR-SIDE sy-vline 
WA_MC46GT1GEN_STR-SUB_ITEM sy-vline 
WA_MC46GT1GEN_STR-TAX_VAL sy-vline 
WA_MC46GT1GEN_STR-TKONN sy-vline 
WA_MC46GT1GEN_STR-TPOSN sy-vline 
WA_MC46GT1GEN_STR-TPOSN_SUB sy-vline 
WA_MC46GT1GEN_STR-UMN sy-vline 
WA_MC46GT1GEN_STR-UMZ sy-vline 
WA_MC46GT1GEN_STR-UNIT_BUOM sy-vline 
WA_MC46GT1GEN_STR-UNIT_DOC sy-vline 
WA_MC46GT1GEN_STR-VALUE sy-vline 
WA_MC46GT1GEN_STR-VAL_TYPE sy-vline 
WA_MC46GT1GEN_STR-WERKS sy-vline      INTO ld_text SEPARATED BY SPACE.

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