ABAP Select data from SAP table PEVSH_YERK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PEVSH_YERK
*  INTO TABLE @DATA(IT_PEVSH_YERK2).
*--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_PEVSH_YERK INDEX 1 INTO DATA(WA_PEVSH_YERK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PEVSH_YERK>-RUNID = 1.
<PEVSH_YERK>-TYEAR = 1.
<PEVSH_YERK>-FORM = 1.
<PEVSH_YERK>-RTYPE = 1.
<PEVSH_YERK>-TSOBJ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PEVSH_YERK-SPONO, sy-vline,
  WA_PEVSH_YERK-TRUNT, sy-vline,
  WA_PEVSH_YERK-MAGTAPE, sy-vline,
  WA_PEVSH_YERK-PRINTED, sy-vline,
  WA_PEVSH_YERK-FILED, sy-vline,
  WA_PEVSH_YERK-VOID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PEVSH_YERK 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_PEVSH_YERK 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_PEVSH_YERK INTO WA_PEVSH_YERK.


*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 GJAHR, internal->external for field TYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PEVSH_YERK-TYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PEVSH_YERK-TYEAR.
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_PEVSH_YERK_STR, 
RUNID TYPE STRING,
TYEAR TYPE STRING,
FORM TYPE STRING,
RTYPE TYPE STRING,
TSOBJ TYPE STRING,
SPONO TYPE STRING,
TRUNT TYPE STRING,
MAGTAPE TYPE STRING,
PRINTED TYPE STRING,
FILED TYPE STRING,
VOID TYPE STRING,
TEST TYPE STRING,
ESS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PEVSH_YERK_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_PEVSH_YERK_STR-RUNID sy-vline 
WA_PEVSH_YERK_STR-TYEAR sy-vline 
WA_PEVSH_YERK_STR-FORM sy-vline 
WA_PEVSH_YERK_STR-RTYPE sy-vline 
WA_PEVSH_YERK_STR-TSOBJ sy-vline 
WA_PEVSH_YERK_STR-SPONO sy-vline 
WA_PEVSH_YERK_STR-TRUNT sy-vline 
WA_PEVSH_YERK_STR-MAGTAPE sy-vline 
WA_PEVSH_YERK_STR-PRINTED sy-vline 
WA_PEVSH_YERK_STR-FILED sy-vline 
WA_PEVSH_YERK_STR-VOID sy-vline 
WA_PEVSH_YERK_STR-TEST sy-vline 
WA_PEVSH_YERK_STR-ESS sy-vline      INTO ld_text SEPARATED BY SPACE.

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