ABAP Select data from SAP table P18_PS_S0731 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P18_PS_S0731 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 P18_PS_S0731. 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 P18_PS_S0731 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_P18_PS_S0731 TYPE STANDARD TABLE OF P18_PS_S0731,
      WA_P18_PS_S0731 TYPE P18_PS_S0731,
      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: <P18_PS_S0731> TYPE P18_PS_S0731.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P18_PS_S0731.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P18_PS_S0731
  INTO TABLE IT_P18_PS_S0731.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P18_PS_S0731
*  INTO TABLE @DATA(IT_P18_PS_S07312).
*--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_P18_PS_S0731 INDEX 1 INTO DATA(WA_P18_PS_S07312).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P18_PS_S0731 ASSIGNING <P18_PS_S0731>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P18_PS_S0731>-IDHOD = 1.
<P18_PS_S0731>-HODNO = 1.
<P18_PS_S0731>-BEGDA = 1.
<P18_PS_S0731>-ENDDA = 1.
<P18_PS_S0731>-ROKY = 1.

ENDLOOP.

LOOP AT IT_P18_PS_S0731 INTO WA_P18_PS_S0731.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P18_PS_S0731-DNY, sy-vline,
  WA_P18_PS_S0731-CITAT, sy-vline,
  WA_P18_PS_S0731-JMENO, sy-vline,
  WA_P18_PS_S0731-TEXT1, sy-vline,
  WA_P18_PS_S0731-TEXT2, sy-vline,
  WA_P18_PS_S0731-DATUM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P18_PS_S0731 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_P18_PS_S0731 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_P18_PS_S0731 INTO WA_P18_PS_S0731.


*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_P18_PS_S0731_STR, 
IDHOD TYPE STRING,
HODNO TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
ROKY TYPE STRING,
DNY TYPE STRING,
CITAT TYPE STRING,
JMENO TYPE STRING,
TEXT1 TYPE STRING,
TEXT2 TYPE STRING,
DATUM TYPE STRING,
MANUA TYPE STRING,
BROKY TYPE STRING,
BDNY TYPE STRING,
MASSN TYPE STRING,
MASSG TYPE STRING,
MIMOR TYPE STRING,
FLAG1 TYPE STRING,
FLAG2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P18_PS_S0731_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_P18_PS_S0731_STR-IDHOD sy-vline 
WA_P18_PS_S0731_STR-HODNO sy-vline 
WA_P18_PS_S0731_STR-BEGDA sy-vline 
WA_P18_PS_S0731_STR-ENDDA sy-vline 
WA_P18_PS_S0731_STR-ROKY sy-vline 
WA_P18_PS_S0731_STR-DNY sy-vline 
WA_P18_PS_S0731_STR-CITAT sy-vline 
WA_P18_PS_S0731_STR-JMENO sy-vline 
WA_P18_PS_S0731_STR-TEXT1 sy-vline 
WA_P18_PS_S0731_STR-TEXT2 sy-vline 
WA_P18_PS_S0731_STR-DATUM sy-vline 
WA_P18_PS_S0731_STR-MANUA sy-vline 
WA_P18_PS_S0731_STR-BROKY sy-vline 
WA_P18_PS_S0731_STR-BDNY sy-vline 
WA_P18_PS_S0731_STR-MASSN sy-vline 
WA_P18_PS_S0731_STR-MASSG sy-vline 
WA_P18_PS_S0731_STR-MIMOR sy-vline 
WA_P18_PS_S0731_STR-FLAG1 sy-vline 
WA_P18_PS_S0731_STR-FLAG2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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