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

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /MVA/AMWWASPROD
*  INTO TABLE @DATA(IT_/MVA/AMWWASPROD2).
*--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/AMWWASPROD INDEX 1 INTO DATA(WA_/MVA/AMWWASPROD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</MVA/AMWWASPROD>-SPOLNR_TT = 1.
</MVA/AMWWASPROD>-SPOLPM_ID = 1.
</MVA/AMWWASPROD>-SAPPLNR_TT = 1.
</MVA/AMWWASPROD>-SAPPLPM_ID = 1.
</MVA/AMWWASPROD>-TPOLNR_TT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/MVA/AMWWASPROD-TPOLPM_ID, sy-vline,
  WA_/MVA/AMWWASPROD-TAPPLNR_TT, sy-vline,
  WA_/MVA/AMWWASPROD-TAPPLPM_ID, sy-vline,
  WA_/MVA/AMWWASPROD-CANCEL_DT, sy-vline,
  WA_/MVA/AMWWASPROD-CANCREAS_CD, sy-vline,
  WA_/MVA/AMWWASPROD-ACTINACTST_CD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/MVA/AMWWASPROD 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/AMWWASPROD 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/AMWWASPROD INTO WA_/MVA/AMWWASPROD.


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

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

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

*Conversion exit ALPHA, internal->external for field TAPPLNR_TT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/MVA/AMWWASPROD-TAPPLNR_TT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MVA/AMWWASPROD-TAPPLNR_TT.
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/AMWWASPROD_STR, 
SPOLNR_TT TYPE STRING,
SPOLPM_ID TYPE STRING,
SAPPLNR_TT TYPE STRING,
SAPPLPM_ID TYPE STRING,
TPOLNR_TT TYPE STRING,
TPOLPM_ID TYPE STRING,
TAPPLNR_TT TYPE STRING,
TAPPLPM_ID TYPE STRING,
CANCEL_DT TYPE STRING,
CANCREAS_CD TYPE STRING,
ACTINACTST_CD TYPE STRING,
EXPIRY_DT TYPE STRING,
NHASTATE_CD TYPE STRING,
PREVENT_BM_FG TYPE STRING,
DELIVER_ADM_DT TYPE STRING,
COMPANYKEY_ID TYPE STRING,
COMPANYKEY_TT TYPE STRING,
REPAYFROM_DT TYPE STRING,
REPAYTO_DT TYPE STRING,
BALPREM_AM TYPE STRING,
REFUNDPREM_AM TYPE STRING,
CURRENCY_ID TYPE STRING,
BALTRANS_CD TYPE STRING,
COMPKEY_TT TYPE STRING,
POLPRPM_TT TYPE STRING,
SAPPLPM_TT TYPE STRING,
SPOLPM_TT TYPE STRING,
TAPPLPMID_TT TYPE STRING,
TAPPLPM_TT TYPE STRING,
TPOLPM_TT TYPE STRING,
CUSTOMER_TM_CI TYPE STRING,
BO_ID TYPE STRING,
CHGVEC_ID TYPE STRING,
ASPROD_ID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/MVA/AMWWASPROD_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/AMWWASPROD_STR-SPOLNR_TT sy-vline 
WA_/MVA/AMWWASPROD_STR-SPOLPM_ID sy-vline 
WA_/MVA/AMWWASPROD_STR-SAPPLNR_TT sy-vline 
WA_/MVA/AMWWASPROD_STR-SAPPLPM_ID sy-vline 
WA_/MVA/AMWWASPROD_STR-TPOLNR_TT sy-vline 
WA_/MVA/AMWWASPROD_STR-TPOLPM_ID sy-vline 
WA_/MVA/AMWWASPROD_STR-TAPPLNR_TT sy-vline 
WA_/MVA/AMWWASPROD_STR-TAPPLPM_ID sy-vline 
WA_/MVA/AMWWASPROD_STR-CANCEL_DT sy-vline 
WA_/MVA/AMWWASPROD_STR-CANCREAS_CD sy-vline 
WA_/MVA/AMWWASPROD_STR-ACTINACTST_CD sy-vline 
WA_/MVA/AMWWASPROD_STR-EXPIRY_DT sy-vline 
WA_/MVA/AMWWASPROD_STR-NHASTATE_CD sy-vline 
WA_/MVA/AMWWASPROD_STR-PREVENT_BM_FG sy-vline 
WA_/MVA/AMWWASPROD_STR-DELIVER_ADM_DT sy-vline 
WA_/MVA/AMWWASPROD_STR-COMPANYKEY_ID sy-vline 
WA_/MVA/AMWWASPROD_STR-COMPANYKEY_TT sy-vline 
WA_/MVA/AMWWASPROD_STR-REPAYFROM_DT sy-vline 
WA_/MVA/AMWWASPROD_STR-REPAYTO_DT sy-vline 
WA_/MVA/AMWWASPROD_STR-BALPREM_AM sy-vline 
WA_/MVA/AMWWASPROD_STR-REFUNDPREM_AM sy-vline 
WA_/MVA/AMWWASPROD_STR-CURRENCY_ID sy-vline 
WA_/MVA/AMWWASPROD_STR-BALTRANS_CD sy-vline 
WA_/MVA/AMWWASPROD_STR-COMPKEY_TT sy-vline 
WA_/MVA/AMWWASPROD_STR-POLPRPM_TT sy-vline 
WA_/MVA/AMWWASPROD_STR-SAPPLPM_TT sy-vline 
WA_/MVA/AMWWASPROD_STR-SPOLPM_TT sy-vline 
WA_/MVA/AMWWASPROD_STR-TAPPLPMID_TT sy-vline 
WA_/MVA/AMWWASPROD_STR-TAPPLPM_TT sy-vline 
WA_/MVA/AMWWASPROD_STR-TPOLPM_TT sy-vline 
WA_/MVA/AMWWASPROD_STR-CUSTOMER_TM_CI sy-vline 
WA_/MVA/AMWWASPROD_STR-BO_ID sy-vline 
WA_/MVA/AMWWASPROD_STR-CHGVEC_ID sy-vline 
WA_/MVA/AMWWASPROD_STR-ASPROD_ID sy-vline      INTO ld_text SEPARATED BY SPACE.

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