ABAP Select data from SAP table TA21PH into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TA21PH 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 TA21PH. 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 TA21PH 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_TA21PH TYPE STANDARD TABLE OF TA21PH,
      WA_TA21PH TYPE TA21PH,
      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: <TA21PH> TYPE TA21PH.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TA21PH.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TA21PH
  INTO TABLE IT_TA21PH.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TA21PH
*  INTO TABLE @DATA(IT_TA21PH2).
*--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_TA21PH INDEX 1 INTO DATA(WA_TA21PH2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TA21PH ASSIGNING <TA21PH>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TA21PH>-MANDT = 1.
<TA21PH>-HOTEL_ID = 1.
<TA21PH>-PROVIDER = 1.
<TA21PH>-LOCID = 1.
<TA21PH>-PROPERTY = 1.

ENDLOOP.

LOOP AT IT_TA21PH INTO WA_TA21PH.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TA21PH-ASC_LOCID, sy-vline,
  WA_TA21PH-NAME, sy-vline,
  WA_TA21PH-STRASSE, sy-vline,
  WA_TA21PH-STRASSE2, sy-vline,
  WA_TA21PH-LAND1, sy-vline,
  WA_TA21PH-PLZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TA21PH 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_TA21PH 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_TA21PH INTO WA_TA21PH.


*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 FMCTP, internal->external for field PROPERTY
CALL FUNCTION 'CONVERSION_EXIT_FMCTP_OUTPUT'
  EXPORTING
    input =                      WA_TA21PH-PROPERTY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TA21PH-PROPERTY.
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_TA21PH_STR, 
MANDT TYPE STRING,
HOTEL_ID TYPE STRING,
PROVIDER TYPE STRING,
LOCID TYPE STRING,
PROPERTY TYPE STRING,
ASC_LOCID TYPE STRING,
NAME TYPE STRING,
STRASSE TYPE STRING,
STRASSE2 TYPE STRING,
LAND1 TYPE STRING,
PLZ TYPE STRING,
ORT TYPE STRING,
ORTSTEIL TYPE STRING,
TELEFON TYPE STRING,
FAX TYPE STRING,
AVAILABLE TYPE STRING,
RESERVE TYPE STRING,
PRIORITY TYPE STRING,
SPECHID TYPE STRING,
AREA_LOC TYPE STRING,
TRANS_LOC TYPE STRING,
RFCDEST TYPE STRING,
URL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TA21PH_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_TA21PH_STR-MANDT sy-vline 
WA_TA21PH_STR-HOTEL_ID sy-vline 
WA_TA21PH_STR-PROVIDER sy-vline 
WA_TA21PH_STR-LOCID sy-vline 
WA_TA21PH_STR-PROPERTY sy-vline 
WA_TA21PH_STR-ASC_LOCID sy-vline 
WA_TA21PH_STR-NAME sy-vline 
WA_TA21PH_STR-STRASSE sy-vline 
WA_TA21PH_STR-STRASSE2 sy-vline 
WA_TA21PH_STR-LAND1 sy-vline 
WA_TA21PH_STR-PLZ sy-vline 
WA_TA21PH_STR-ORT sy-vline 
WA_TA21PH_STR-ORTSTEIL sy-vline 
WA_TA21PH_STR-TELEFON sy-vline 
WA_TA21PH_STR-FAX sy-vline 
WA_TA21PH_STR-AVAILABLE sy-vline 
WA_TA21PH_STR-RESERVE sy-vline 
WA_TA21PH_STR-PRIORITY sy-vline 
WA_TA21PH_STR-SPECHID sy-vline 
WA_TA21PH_STR-AREA_LOC sy-vline 
WA_TA21PH_STR-TRANS_LOC sy-vline 
WA_TA21PH_STR-RFCDEST sy-vline 
WA_TA21PH_STR-URL sy-vline      INTO ld_text SEPARATED BY SPACE.

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