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

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /MVA/AMD_ET_DATA
*  INTO TABLE @DATA(IT_/MVA/AMD_ET_DATA2).
*--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/AMD_ET_DATA INDEX 1 INTO DATA(WA_/MVA/AMD_ET_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</MVA/AMD_ET_DATA>-CLIENT = 1.
</MVA/AMD_ET_DATA>-NAT_CD = 1.
</MVA/AMD_ET_DATA>-VALID_FROM_DT = 1.
</MVA/AMD_ET_DATA>-CUSTOMER_PM_CI = 1.
</MVA/AMD_ET_DATA>-PRODUCER_TT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/MVA/AMD_ET_DATA-TYPE_TT, sy-vline,
  WA_/MVA/AMD_ET_DATA-COMMERCIAL_TT, sy-vline,
  WA_/MVA/AMD_ET_DATA-OUTPUT_KW_VL, sy-vline,
  WA_/MVA/AMD_ET_DATA-CAPACITY_VL, sy-vline,
  WA_/MVA/AMD_ET_DATA-GROSS_PRICE_AM, sy-vline,
  WA_/MVA/AMD_ET_DATA-NET_PRICE_AM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/MVA/AMD_ET_DATA 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/AMD_ET_DATA 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/AMD_ET_DATA INTO WA_/MVA/AMD_ET_DATA.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_/MVA/AMD_ET_DATA_STR, 
CLIENT TYPE STRING,
NAT_CD TYPE STRING,
VALID_FROM_DT TYPE STRING,
CUSTOMER_PM_CI TYPE STRING,
PRODUCER_TT TYPE STRING,
TYPE_TT TYPE STRING,
COMMERCIAL_TT TYPE STRING,
OUTPUT_KW_VL TYPE STRING,
CAPACITY_VL TYPE STRING,
GROSS_PRICE_AM TYPE STRING,
NET_PRICE_AM TYPE STRING,
VALID_TO_DT TYPE STRING,
KIND_CD TYPE STRING,
MODEL_GRP_TT TYPE STRING,
SEATS_AM TYPE STRING,
DOORS_AM TYPE STRING,
NET_WEIGHT_AM TYPE STRING,
USE_WEIGHT_AM TYPE STRING,
GROSS_WEIGHT_AM TYPE STRING,
DRIVEMODE_CD TYPE STRING,
CAT_CD TYPE STRING,
CO2EXHAUST_AM TYPE STRING,
GEAR_CD TYPE STRING,
GEARS_AM TYPE STRING,
BODY_CD TYPE STRING,
MODELYR_FR_VL TYPE STRING,
MODELYR_TO_VL TYPE STRING,
IMPYR_FR_VL TYPE STRING,
IMPYR_TO_VL TYPE STRING,
CURRENCY_ID TYPE STRING,
PRODUCER_UC_TT TYPE STRING,
TYPE_UC_TT TYPE STRING,
COMMERCIAL_UC_TT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/MVA/AMD_ET_DATA_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/AMD_ET_DATA_STR-CLIENT sy-vline 
WA_/MVA/AMD_ET_DATA_STR-NAT_CD sy-vline 
WA_/MVA/AMD_ET_DATA_STR-VALID_FROM_DT sy-vline 
WA_/MVA/AMD_ET_DATA_STR-CUSTOMER_PM_CI sy-vline 
WA_/MVA/AMD_ET_DATA_STR-PRODUCER_TT sy-vline 
WA_/MVA/AMD_ET_DATA_STR-TYPE_TT sy-vline 
WA_/MVA/AMD_ET_DATA_STR-COMMERCIAL_TT sy-vline 
WA_/MVA/AMD_ET_DATA_STR-OUTPUT_KW_VL sy-vline 
WA_/MVA/AMD_ET_DATA_STR-CAPACITY_VL sy-vline 
WA_/MVA/AMD_ET_DATA_STR-GROSS_PRICE_AM sy-vline 
WA_/MVA/AMD_ET_DATA_STR-NET_PRICE_AM sy-vline 
WA_/MVA/AMD_ET_DATA_STR-VALID_TO_DT sy-vline 
WA_/MVA/AMD_ET_DATA_STR-KIND_CD sy-vline 
WA_/MVA/AMD_ET_DATA_STR-MODEL_GRP_TT sy-vline 
WA_/MVA/AMD_ET_DATA_STR-SEATS_AM sy-vline 
WA_/MVA/AMD_ET_DATA_STR-DOORS_AM sy-vline 
WA_/MVA/AMD_ET_DATA_STR-NET_WEIGHT_AM sy-vline 
WA_/MVA/AMD_ET_DATA_STR-USE_WEIGHT_AM sy-vline 
WA_/MVA/AMD_ET_DATA_STR-GROSS_WEIGHT_AM sy-vline 
WA_/MVA/AMD_ET_DATA_STR-DRIVEMODE_CD sy-vline 
WA_/MVA/AMD_ET_DATA_STR-CAT_CD sy-vline 
WA_/MVA/AMD_ET_DATA_STR-CO2EXHAUST_AM sy-vline 
WA_/MVA/AMD_ET_DATA_STR-GEAR_CD sy-vline 
WA_/MVA/AMD_ET_DATA_STR-GEARS_AM sy-vline 
WA_/MVA/AMD_ET_DATA_STR-BODY_CD sy-vline 
WA_/MVA/AMD_ET_DATA_STR-MODELYR_FR_VL sy-vline 
WA_/MVA/AMD_ET_DATA_STR-MODELYR_TO_VL sy-vline 
WA_/MVA/AMD_ET_DATA_STR-IMPYR_FR_VL sy-vline 
WA_/MVA/AMD_ET_DATA_STR-IMPYR_TO_VL sy-vline 
WA_/MVA/AMD_ET_DATA_STR-CURRENCY_ID sy-vline 
WA_/MVA/AMD_ET_DATA_STR-PRODUCER_UC_TT sy-vline 
WA_/MVA/AMD_ET_DATA_STR-TYPE_UC_TT sy-vline 
WA_/MVA/AMD_ET_DATA_STR-COMMERCIAL_UC_TT sy-vline      INTO ld_text SEPARATED BY SPACE.

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