ABAP Select data from SAP table PVWTY_ALV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PVWTY_ALV
*  INTO TABLE @DATA(IT_PVWTY_ALV2).
*--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_PVWTY_ALV INDEX 1 INTO DATA(WA_PVWTY_ALV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PVWTY_ALV>-PRICING = 1.
<PVWTY_ALV>-POSNR = 1.
<PVWTY_ALV>-POSKT = 1.
<PVWTY_ALV>-DEFCT = 1.
<PVWTY_ALV>-ITMNO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PVWTY_ALV-QUANT, sy-vline,
  WA_PVWTY_ALV-MEINH, sy-vline,
  WA_PVWTY_ALV-CONTR, sy-vline,
  WA_PVWTY_ALV-CNTTY, sy-vline,
  WA_PVWTY_ALV-REJCD, sy-vline,
  WA_PVWTY_ALV-REFKT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PVWTY_ALV 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_PVWTY_ALV 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_PVWTY_ALV INTO WA_PVWTY_ALV.


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

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

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

*Conversion exit GERNR, internal->external for field I_SERNO
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_PVWTY_ALV-I_SERNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PVWTY_ALV-I_SERNO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field I_MGANR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PVWTY_ALV-I_MGANR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PVWTY_ALV-I_MGANR.
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_PVWTY_ALV_STR, 
PRICING TYPE STRING,
POSNR TYPE STRING,
POSKT TYPE STRING,
DEFCT TYPE STRING,
ITMNO TYPE STRING,
QUANT TYPE STRING,
MEINH TYPE STRING,
CONTR TYPE STRING,
CNTTY TYPE STRING,
REJCD TYPE STRING,
REFKT TYPE STRING,
REFNR TYPE STRING,
RETPA TYPE STRING,
CAUSP TYPE STRING,
PVTXT TYPE STRING,
VALIC TYPE STRING,
VALOV TYPE STRING,
VALIV TYPE STRING,
VALOC TYPE STRING,
MATNR TYPE STRING,
MDOCM TYPE STRING,
LOG_HANDLE TYPE STRING,
HERST TYPE STRING,
SPLIT TYPE STRING,
RETPA_V TYPE STRING,
TAX_CODE TYPE STRING,
TXJCD1 TYPE STRING,
TXJCD2 TYPE STRING,
TXJCD3 TYPE STRING,
RESULT_OUT_MWTYI TYPE STRING,
RESULT_IN_MWTYI TYPE STRING,
POSKT_CUST TYPE STRING,
REFDT_REFNR TYPE STRING,
I_RELOB TYPE STRING,
I_RELOB_EXT TYPE STRING,
I_RELTY TYPE STRING,
I_RELDT TYPE STRING,
I_SERNO TYPE STRING,
I_MGANR TYPE STRING,
I_GWLDT TYPE STRING,
RETPA_DATE TYPE STRING,
RETPA_DATE_V TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PVWTY_ALV_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_PVWTY_ALV_STR-PRICING sy-vline 
WA_PVWTY_ALV_STR-POSNR sy-vline 
WA_PVWTY_ALV_STR-POSKT sy-vline 
WA_PVWTY_ALV_STR-DEFCT sy-vline 
WA_PVWTY_ALV_STR-ITMNO sy-vline 
WA_PVWTY_ALV_STR-QUANT sy-vline 
WA_PVWTY_ALV_STR-MEINH sy-vline 
WA_PVWTY_ALV_STR-CONTR sy-vline 
WA_PVWTY_ALV_STR-CNTTY sy-vline 
WA_PVWTY_ALV_STR-REJCD sy-vline 
WA_PVWTY_ALV_STR-REFKT sy-vline 
WA_PVWTY_ALV_STR-REFNR sy-vline 
WA_PVWTY_ALV_STR-RETPA sy-vline 
WA_PVWTY_ALV_STR-CAUSP sy-vline 
WA_PVWTY_ALV_STR-PVTXT sy-vline 
WA_PVWTY_ALV_STR-VALIC sy-vline 
WA_PVWTY_ALV_STR-VALOV sy-vline 
WA_PVWTY_ALV_STR-VALIV sy-vline 
WA_PVWTY_ALV_STR-VALOC sy-vline 
WA_PVWTY_ALV_STR-MATNR sy-vline 
WA_PVWTY_ALV_STR-MDOCM sy-vline 
WA_PVWTY_ALV_STR-LOG_HANDLE sy-vline 
WA_PVWTY_ALV_STR-HERST sy-vline 
WA_PVWTY_ALV_STR-SPLIT sy-vline 
WA_PVWTY_ALV_STR-RETPA_V sy-vline 
WA_PVWTY_ALV_STR-TAX_CODE sy-vline 
WA_PVWTY_ALV_STR-TXJCD1 sy-vline 
WA_PVWTY_ALV_STR-TXJCD2 sy-vline 
WA_PVWTY_ALV_STR-TXJCD3 sy-vline 
WA_PVWTY_ALV_STR-RESULT_OUT_MWTYI sy-vline 
WA_PVWTY_ALV_STR-RESULT_IN_MWTYI sy-vline 
WA_PVWTY_ALV_STR-POSKT_CUST sy-vline 
WA_PVWTY_ALV_STR-REFDT_REFNR sy-vline 
WA_PVWTY_ALV_STR-I_RELOB sy-vline 
WA_PVWTY_ALV_STR-I_RELOB_EXT sy-vline 
WA_PVWTY_ALV_STR-I_RELTY sy-vline 
WA_PVWTY_ALV_STR-I_RELDT sy-vline 
WA_PVWTY_ALV_STR-I_SERNO sy-vline 
WA_PVWTY_ALV_STR-I_MGANR sy-vline 
WA_PVWTY_ALV_STR-I_GWLDT sy-vline 
WA_PVWTY_ALV_STR-RETPA_DATE sy-vline 
WA_PVWTY_ALV_STR-RETPA_DATE_V sy-vline      INTO ld_text SEPARATED BY SPACE.

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