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

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /MVA/AMC_FCS_POL_TAXPAYR
*  INTO TABLE @DATA(IT_/MVA/AMC_FCS_POL_TAXPAYR2).
*--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/AMC_FCS_POL_TAXPAYR INDEX 1 INTO DATA(WA_/MVA/AMC_FCS_POL_TAXPAYR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</MVA/AMC_FCS_POL_TAXPAYR>-WA_TAXPAYR = 1.
</MVA/AMC_FCS_POL_TAXPAYR>-COVERAGE_ID = 1.
</MVA/AMC_FCS_POL_TAXPAYR>-ADDRESSNUMBER_ID = 1.
</MVA/AMC_FCS_POL_TAXPAYR>-BANKACC_ID = 1.
</MVA/AMC_FCS_POL_TAXPAYR>-CURRENCY_ID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/MVA/AMC_FCS_POL_TAXPAYR-PARTNER_ID, sy-vline,
  WA_/MVA/AMC_FCS_POL_TAXPAYR-OUTGOINGPAY_CD, sy-vline,
  WA_/MVA/AMC_FCS_POL_TAXPAYR-PAYMENTCARD_ID, sy-vline,
  WA_/MVA/AMC_FCS_POL_TAXPAYR-ASSESSMENTTYP_CD, sy-vline,
  WA_/MVA/AMC_FCS_POL_TAXPAYR-TAXPAYERINFO_CD, sy-vline,
  WA_/MVA/AMC_FCS_POL_TAXPAYR-CUSTOMER_PB_CI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/MVA/AMC_FCS_POL_TAXPAYR 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/AMC_FCS_POL_TAXPAYR 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/AMC_FCS_POL_TAXPAYR INTO WA_/MVA/AMC_FCS_POL_TAXPAYR.


*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 PARTNER_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/MVA/AMC_FCS_POL_TAXPAYR-PARTNER_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MVA/AMC_FCS_POL_TAXPAYR-PARTNER_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/AMC_FCS_POL_TAXPAYR_STR, 
WA_TAXPAYR TYPE STRING,
COVERAGE_ID TYPE STRING,
ADDRESSNUMBER_ID TYPE STRING,
BANKACC_ID TYPE STRING,
CURRENCY_ID TYPE STRING,
PARTNER_ID TYPE STRING,
OUTGOINGPAY_CD TYPE STRING,
PAYMENTCARD_ID TYPE STRING,
ASSESSMENTTYP_CD TYPE STRING,
TAXPAYERINFO_CD TYPE STRING,
CUSTOMER_PB_CI TYPE STRING,
TRANSFER_ID TYPE STRING,
SETTLE_ID TYPE STRING,
TAXPAYR_ID TYPE STRING,
ADDRESS_TT TYPE STRING,
ASSESSMENTTYP_TT TYPE STRING,
BIRTH_DT TYPE STRING,
COVNUM_VL TYPE STRING,
COVPM_ID TYPE STRING,
DEFTAXPAYR_FG TYPE STRING,
ELEMENTPROD_TT TYPE STRING,
GENDER_CD TYPE STRING,
GENDER_TT TYPE STRING,
PARTNERNAME_TT TYPE STRING,
PARTNERTYPE_CD TYPE STRING,
PARTNERTYPE_TT TYPE STRING,
TAXPAYERINFO_TT TYPE STRING,
CUSTOMER_TB_CI TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/MVA/AMC_FCS_POL_TAXPAYR_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/AMC_FCS_POL_TAXPAYR_STR-WA_TAXPAYR sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-COVERAGE_ID sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-ADDRESSNUMBER_ID sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-BANKACC_ID sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-CURRENCY_ID sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-PARTNER_ID sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-OUTGOINGPAY_CD sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-PAYMENTCARD_ID sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-ASSESSMENTTYP_CD sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-TAXPAYERINFO_CD sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-CUSTOMER_PB_CI sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-TRANSFER_ID sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-SETTLE_ID sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-TAXPAYR_ID sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-ADDRESS_TT sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-ASSESSMENTTYP_TT sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-BIRTH_DT sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-COVNUM_VL sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-COVPM_ID sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-DEFTAXPAYR_FG sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-ELEMENTPROD_TT sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-GENDER_CD sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-GENDER_TT sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-PARTNERNAME_TT sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-PARTNERTYPE_CD sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-PARTNERTYPE_TT sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-TAXPAYERINFO_TT sy-vline 
WA_/MVA/AMC_FCS_POL_TAXPAYR_STR-CUSTOMER_TB_CI sy-vline      INTO ld_text SEPARATED BY SPACE.

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