ABAP Select data from SAP table PVEPH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PVEPH
*  INTO TABLE @DATA(IT_PVEPH2).
*--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_PVEPH INDEX 1 INTO DATA(WA_PVEPH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PVEPH>-LETRF = 1.
<PVEPH>-NUMRF = 1.
<PVEPH>-FILL1 = 1.
<PVEPH>-NACIO = 1.
<PVEPH>-CEDUL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PVEPH-NOMBR, sy-vline,
  WA_PVEPH-FECNC, sy-vline,
  WA_PVEPH-SEXO, sy-vline,
  WA_PVEPH-TPMOV, sy-vline,
  WA_PVEPH-MONTO, sy-vline,
  WA_PVEPH-PERIO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PVEPH 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_PVEPH 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_PVEPH INTO WA_PVEPH.


*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_PVEPH_STR, 
LETRF TYPE STRING,
NUMRF TYPE STRING,
FILL1 TYPE STRING,
NACIO TYPE STRING,
CEDUL TYPE STRING,
NOMBR TYPE STRING,
FECNC TYPE STRING,
SEXO TYPE STRING,
TPMOV TYPE STRING,
MONTO TYPE STRING,
PERIO TYPE STRING,
LOCAL TYPE STRING,
FILL2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PVEPH_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_PVEPH_STR-LETRF sy-vline 
WA_PVEPH_STR-NUMRF sy-vline 
WA_PVEPH_STR-FILL1 sy-vline 
WA_PVEPH_STR-NACIO sy-vline 
WA_PVEPH_STR-CEDUL sy-vline 
WA_PVEPH_STR-NOMBR sy-vline 
WA_PVEPH_STR-FECNC sy-vline 
WA_PVEPH_STR-SEXO sy-vline 
WA_PVEPH_STR-TPMOV sy-vline 
WA_PVEPH_STR-MONTO sy-vline 
WA_PVEPH_STR-PERIO sy-vline 
WA_PVEPH_STR-LOCAL sy-vline 
WA_PVEPH_STR-FILL2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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