ABAP Select data from SAP table TCGTPLH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TCGTPLH
*  INTO TABLE @DATA(IT_TCGTPLH2).
*--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_TCGTPLH INDEX 1 INTO DATA(WA_TCGTPLH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TCGTPLH>-MANDT = 1.
<TCGTPLH>-RECN_GRP = 1.
<TCGTPLH>-AENNR = 1.
<TCGTPLH>-SEARCHMODE = 1.
<TCGTPLH>-VALDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TCGTPLH-VALFR, sy-vline,
  WA_TCGTPLH-VALTO, sy-vline,
  WA_TCGTPLH-CRDAT, sy-vline,
  WA_TCGTPLH-CRNAM, sy-vline,
  WA_TCGTPLH-UPDDAT, sy-vline,
  WA_TCGTPLH-UPDNAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TCGTPLH 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_TCGTPLH 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_TCGTPLH INTO WA_TCGTPLH.


*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 ALPHA, internal->external for field RECN_GRP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TCGTPLH-RECN_GRP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TCGTPLH-RECN_GRP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AENNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TCGTPLH-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TCGTPLH-AENNR.
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_TCGTPLH_STR, 
MANDT TYPE STRING,
RECN_GRP TYPE STRING,
AENNR TYPE STRING,
SEARCHMODE TYPE STRING,
VALDAT TYPE STRING,
VALFR TYPE STRING,
VALTO TYPE STRING,
CRDAT TYPE STRING,
CRNAM TYPE STRING,
UPDDAT TYPE STRING,
UPDNAM TYPE STRING,
OBJID TYPE STRING,
GRPID TYPE STRING,
ORD TYPE STRING,
FLG_DST_CHNG TYPE STRING,
FLG_INH_DSBL TYPE STRING,
FLG_INH_EXCL TYPE STRING,
FLG_ALL_PROP TYPE STRING,
FLG_ALL_IDENT TYPE STRING,
FLG_ALL_USAGES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TCGTPLH_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_TCGTPLH_STR-MANDT sy-vline 
WA_TCGTPLH_STR-RECN_GRP sy-vline 
WA_TCGTPLH_STR-AENNR sy-vline 
WA_TCGTPLH_STR-SEARCHMODE sy-vline 
WA_TCGTPLH_STR-VALDAT sy-vline 
WA_TCGTPLH_STR-VALFR sy-vline 
WA_TCGTPLH_STR-VALTO sy-vline 
WA_TCGTPLH_STR-CRDAT sy-vline 
WA_TCGTPLH_STR-CRNAM sy-vline 
WA_TCGTPLH_STR-UPDDAT sy-vline 
WA_TCGTPLH_STR-UPDNAM sy-vline 
WA_TCGTPLH_STR-OBJID sy-vline 
WA_TCGTPLH_STR-GRPID sy-vline 
WA_TCGTPLH_STR-ORD sy-vline 
WA_TCGTPLH_STR-FLG_DST_CHNG sy-vline 
WA_TCGTPLH_STR-FLG_INH_DSBL sy-vline 
WA_TCGTPLH_STR-FLG_INH_EXCL sy-vline 
WA_TCGTPLH_STR-FLG_ALL_PROP sy-vline 
WA_TCGTPLH_STR-FLG_ALL_IDENT sy-vline 
WA_TCGTPLH_STR-FLG_ALL_USAGES sy-vline      INTO ld_text SEPARATED BY SPACE.

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