ABAP Select data from SAP table PS0127 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PS0127 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 PS0127. 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 PS0127 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_PS0127 TYPE STANDARD TABLE OF PS0127,
      WA_PS0127 TYPE PS0127,
      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: <PS0127> TYPE PS0127.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PS0127.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PS0127
  INTO TABLE IT_PS0127.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PS0127
*  INTO TABLE @DATA(IT_PS01272).
*--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_PS0127 INDEX 1 INTO DATA(WA_PS01272).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PS0127 ASSIGNING <PS0127>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PS0127>-BETRG = 1.
<PS0127>-WAERS = 1.
<PS0127>-TRCD1 = 1.
<PS0127>-WKDY1 = 1.
<PS0127>-DY1KM = 1.

ENDLOOP.

LOOP AT IT_PS0127 INTO WA_PS0127.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PS0127-TRCD2, sy-vline,
  WA_PS0127-WKDY2, sy-vline,
  WA_PS0127-DY2KM, sy-vline,
  WA_PS0127-TRCD3, sy-vline,
  WA_PS0127-WKDY3, sy-vline,
  WA_PS0127-DY3KM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PS0127 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_PS0127 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_PS0127 INTO WA_PS0127.


*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_PS0127_STR, 
BETRG TYPE STRING,
WAERS TYPE STRING,
TRCD1 TYPE STRING,
WKDY1 TYPE STRING,
DY1KM TYPE STRING,
TRCD2 TYPE STRING,
WKDY2 TYPE STRING,
DY2KM TYPE STRING,
TRCD3 TYPE STRING,
WKDY3 TYPE STRING,
DY3KM TYPE STRING,
VERG1 TYPE STRING,
VERG2 TYPE STRING,
VERG3 TYPE STRING,
BBZKT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PS0127_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_PS0127_STR-BETRG sy-vline 
WA_PS0127_STR-WAERS sy-vline 
WA_PS0127_STR-TRCD1 sy-vline 
WA_PS0127_STR-WKDY1 sy-vline 
WA_PS0127_STR-DY1KM sy-vline 
WA_PS0127_STR-TRCD2 sy-vline 
WA_PS0127_STR-WKDY2 sy-vline 
WA_PS0127_STR-DY2KM sy-vline 
WA_PS0127_STR-TRCD3 sy-vline 
WA_PS0127_STR-WKDY3 sy-vline 
WA_PS0127_STR-DY3KM sy-vline 
WA_PS0127_STR-VERG1 sy-vline 
WA_PS0127_STR-VERG2 sy-vline 
WA_PS0127_STR-VERG3 sy-vline 
WA_PS0127_STR-BBZKT sy-vline      INTO ld_text SEPARATED BY SPACE.

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