ABAP Select data from SAP table /MVA/AMDVMLMAIN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /MVA/AMDVMLMAIN 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 /MVA/AMDVMLMAIN. 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 /MVA/AMDVMLMAIN 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_/MVA/AMDVMLMAIN TYPE STANDARD TABLE OF /MVA/AMDVMLMAIN,
      WA_/MVA/AMDVMLMAIN TYPE /MVA/AMDVMLMAIN,
      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: </MVA/AMDVMLMAIN> TYPE /MVA/AMDVMLMAIN.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /MVA/AMDVMLMAIN
  INTO TABLE IT_/MVA/AMDVMLMAIN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /MVA/AMDVMLMAIN
*  INTO TABLE @DATA(IT_/MVA/AMDVMLMAIN2).
*--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_/MVA/AMDVMLMAIN INDEX 1 INTO DATA(WA_/MVA/AMDVMLMAIN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/MVA/AMDVMLMAIN ASSIGNING </MVA/AMDVMLMAIN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</MVA/AMDVMLMAIN>-CLIENT = 1.
</MVA/AMDVMLMAIN>-REC_ID = 1.
</MVA/AMDVMLMAIN>-INSURER_ID = 1.
</MVA/AMDVMLMAIN>-OFFICE_ID = 1.
</MVA/AMDVMLMAIN>-POLICY_TT = 1.

ENDLOOP.

LOOP AT IT_/MVA/AMDVMLMAIN INTO WA_/MVA/AMDVMLMAIN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/MVA/AMDVMLMAIN-APPLNR_TT, sy-vline,
  WA_/MVA/AMDVMLMAIN-BM_ID, sy-vline,
  WA_/MVA/AMDVMLMAIN-NAME_TT, sy-vline,
  WA_/MVA/AMDVMLMAIN-FIRST_NAME_TT, sy-vline,
  WA_/MVA/AMDVMLMAIN-STREET_TT, sy-vline,
  WA_/MVA/AMDVMLMAIN-ZIP_CODE_TT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/MVA/AMDVMLMAIN 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_/MVA/AMDVMLMAIN 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_/MVA/AMDVMLMAIN INTO WA_/MVA/AMDVMLMAIN.


*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 APPLNR_TT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/MVA/AMDVMLMAIN-APPLNR_TT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MVA/AMDVMLMAIN-APPLNR_TT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BP_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/MVA/AMDVMLMAIN-BP_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MVA/AMDVMLMAIN-BP_ID.
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_/MVA/AMDVMLMAIN_STR, 
CLIENT TYPE STRING,
REC_ID TYPE STRING,
INSURER_ID TYPE STRING,
OFFICE_ID TYPE STRING,
POLICY_TT TYPE STRING,
APPLNR_TT TYPE STRING,
BM_ID TYPE STRING,
NAME_TT TYPE STRING,
FIRST_NAME_TT TYPE STRING,
STREET_TT TYPE STRING,
ZIP_CODE_TT TYPE STRING,
CITY_TT TYPE STRING,
LICENCE_TT TYPE STRING,
CANCEL_DT TYPE STRING,
CLASS_ID TYPE STRING,
NO_OF_CLAIMS_VL TYPE STRING,
MODIF_TP TYPE STRING,
MODIF_DT TYPE STRING,
REC_TP TYPE STRING,
DELIVERY_VL TYPE STRING,
DELIVERY_DT TYPE STRING,
POLICY_ID TYPE STRING,
BP_ID TYPE STRING,
CHANGEUSR_TT TYPE STRING,
CHANGE_TS TYPE STRING,
RECORDUSR_TT TYPE STRING,
RECORD_TS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/MVA/AMDVMLMAIN_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_/MVA/AMDVMLMAIN_STR-CLIENT sy-vline 
WA_/MVA/AMDVMLMAIN_STR-REC_ID sy-vline 
WA_/MVA/AMDVMLMAIN_STR-INSURER_ID sy-vline 
WA_/MVA/AMDVMLMAIN_STR-OFFICE_ID sy-vline 
WA_/MVA/AMDVMLMAIN_STR-POLICY_TT sy-vline 
WA_/MVA/AMDVMLMAIN_STR-APPLNR_TT sy-vline 
WA_/MVA/AMDVMLMAIN_STR-BM_ID sy-vline 
WA_/MVA/AMDVMLMAIN_STR-NAME_TT sy-vline 
WA_/MVA/AMDVMLMAIN_STR-FIRST_NAME_TT sy-vline 
WA_/MVA/AMDVMLMAIN_STR-STREET_TT sy-vline 
WA_/MVA/AMDVMLMAIN_STR-ZIP_CODE_TT sy-vline 
WA_/MVA/AMDVMLMAIN_STR-CITY_TT sy-vline 
WA_/MVA/AMDVMLMAIN_STR-LICENCE_TT sy-vline 
WA_/MVA/AMDVMLMAIN_STR-CANCEL_DT sy-vline 
WA_/MVA/AMDVMLMAIN_STR-CLASS_ID sy-vline 
WA_/MVA/AMDVMLMAIN_STR-NO_OF_CLAIMS_VL sy-vline 
WA_/MVA/AMDVMLMAIN_STR-MODIF_TP sy-vline 
WA_/MVA/AMDVMLMAIN_STR-MODIF_DT sy-vline 
WA_/MVA/AMDVMLMAIN_STR-REC_TP sy-vline 
WA_/MVA/AMDVMLMAIN_STR-DELIVERY_VL sy-vline 
WA_/MVA/AMDVMLMAIN_STR-DELIVERY_DT sy-vline 
WA_/MVA/AMDVMLMAIN_STR-POLICY_ID sy-vline 
WA_/MVA/AMDVMLMAIN_STR-BP_ID sy-vline 
WA_/MVA/AMDVMLMAIN_STR-CHANGEUSR_TT sy-vline 
WA_/MVA/AMDVMLMAIN_STR-CHANGE_TS sy-vline 
WA_/MVA/AMDVMLMAIN_STR-RECORDUSR_TT sy-vline 
WA_/MVA/AMDVMLMAIN_STR-RECORD_TS sy-vline      INTO ld_text SEPARATED BY SPACE.

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