ABAP Select data from SAP table PS3412 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PS3412 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 PS3412. 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 PS3412 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_PS3412 TYPE STANDARD TABLE OF PS3412,
      WA_PS3412 TYPE PS3412,
      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: <PS3412> TYPE PS3412.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PS3412.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PS3412
  INTO TABLE IT_PS3412.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PS3412
*  INTO TABLE @DATA(IT_PS34122).
*--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_PS3412 INDEX 1 INTO DATA(WA_PS34122).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PS3412 ASSIGNING <PS3412>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PS3412>-PERIO = 1.
<PS3412>-ABKRS = 1.
<PS3412>-ACTIO = 1.
<PS3412>-MOLGA = 1.
<PS3412>-APPL = 1.

ENDLOOP.

LOOP AT IT_PS3412 INTO WA_PS3412.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PS3412-WAERS, sy-vline,
  WA_PS3412-CPAGE, sy-vline,
  WA_PS3412-FTYPE, sy-vline,
  WA_PS3412-FNAME, sy-vline,
  WA_PS3412-GLBID, sy-vline,
  WA_PS3412-ADFLD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PS3412 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_PS3412 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_PS3412 INTO WA_PS3412.


*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_PS3412_STR, 
PERIO TYPE STRING,
ABKRS TYPE STRING,
ACTIO TYPE STRING,
MOLGA TYPE STRING,
APPL TYPE STRING,
WAERS TYPE STRING,
CPAGE TYPE STRING,
FTYPE TYPE STRING,
FNAME TYPE STRING,
GLBID TYPE STRING,
ADFLD TYPE STRING,
SESRC TYPE STRING,
ADSRC TYPE STRING,
SEKEY TYPE STRING,
ADKEY TYPE STRING,
CDAT1 TYPE STRING,
CDAT2 TYPE STRING,
CDAT3 TYPE STRING,
CDAT4 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PS3412_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_PS3412_STR-PERIO sy-vline 
WA_PS3412_STR-ABKRS sy-vline 
WA_PS3412_STR-ACTIO sy-vline 
WA_PS3412_STR-MOLGA sy-vline 
WA_PS3412_STR-APPL sy-vline 
WA_PS3412_STR-WAERS sy-vline 
WA_PS3412_STR-CPAGE sy-vline 
WA_PS3412_STR-FTYPE sy-vline 
WA_PS3412_STR-FNAME sy-vline 
WA_PS3412_STR-GLBID sy-vline 
WA_PS3412_STR-ADFLD sy-vline 
WA_PS3412_STR-SESRC sy-vline 
WA_PS3412_STR-ADSRC sy-vline 
WA_PS3412_STR-SEKEY sy-vline 
WA_PS3412_STR-ADKEY sy-vline 
WA_PS3412_STR-CDAT1 sy-vline 
WA_PS3412_STR-CDAT2 sy-vline 
WA_PS3412_STR-CDAT3 sy-vline 
WA_PS3412_STR-CDAT4 sy-vline      INTO ld_text SEPARATED BY SPACE.

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