ABAP Select data from SAP table P44_ATSAN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P44_ATSAN 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 P44_ATSAN. 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 P44_ATSAN 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_P44_ATSAN TYPE STANDARD TABLE OF P44_ATSAN,
      WA_P44_ATSAN TYPE P44_ATSAN,
      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: <P44_ATSAN> TYPE P44_ATSAN.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P44_ATSAN.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P44_ATSAN
  INTO TABLE IT_P44_ATSAN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P44_ATSAN
*  INTO TABLE @DATA(IT_P44_ATSAN2).
*--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_P44_ATSAN INDEX 1 INTO DATA(WA_P44_ATSAN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P44_ATSAN ASSIGNING <P44_ATSAN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P44_ATSAN>-ATSDC = 1.
<P44_ATSAN>-ATS0T = 1.
<P44_ATSAN>-TXRNO = 1.
<P44_ATSAN>-ATSYR = 1.
<P44_ATSAN>-EVENT = 1.

ENDLOOP.

LOOP AT IT_P44_ATSAN INTO WA_P44_ATSAN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P44_ATSAN-CPNAM, sy-vline,
  WA_P44_ATSAN-CPTEL, sy-vline,
  WA_P44_ATSAN-ERHOU, sy-vline,
  WA_P44_ATSAN-TYPER, sy-vline,
  WA_P44_ATSAN-TYHOU, sy-vline,
  WA_P44_ATSAN-TYLIE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P44_ATSAN 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_P44_ATSAN 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_P44_ATSAN INTO WA_P44_ATSAN.


*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_P44_ATSAN_STR, 
ATSDC TYPE STRING,
ATS0T TYPE STRING,
TXRNO TYPE STRING,
ATSYR TYPE STRING,
EVENT TYPE STRING,
CPNAM TYPE STRING,
CPTEL TYPE STRING,
ERHOU TYPE STRING,
TYPER TYPE STRING,
TYHOU TYPE STRING,
TYLIE TYPE STRING,
TYOTH TYPE STRING,
EXMCO TYPE STRING,
TOTEE TYPE STRING,
SISAL TYPE STRING,
SICON TYPE STRING,
SIEXM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P44_ATSAN_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_P44_ATSAN_STR-ATSDC sy-vline 
WA_P44_ATSAN_STR-ATS0T sy-vline 
WA_P44_ATSAN_STR-TXRNO sy-vline 
WA_P44_ATSAN_STR-ATSYR sy-vline 
WA_P44_ATSAN_STR-EVENT sy-vline 
WA_P44_ATSAN_STR-CPNAM sy-vline 
WA_P44_ATSAN_STR-CPTEL sy-vline 
WA_P44_ATSAN_STR-ERHOU sy-vline 
WA_P44_ATSAN_STR-TYPER sy-vline 
WA_P44_ATSAN_STR-TYHOU sy-vline 
WA_P44_ATSAN_STR-TYLIE sy-vline 
WA_P44_ATSAN_STR-TYOTH sy-vline 
WA_P44_ATSAN_STR-EXMCO sy-vline 
WA_P44_ATSAN_STR-TOTEE sy-vline 
WA_P44_ATSAN_STR-SISAL sy-vline 
WA_P44_ATSAN_STR-SICON sy-vline 
WA_P44_ATSAN_STR-SIEXM sy-vline      INTO ld_text SEPARATED BY SPACE.

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