ABAP Select data from SAP table THMT_CALC_TYPES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM THMT_CALC_TYPES
*  INTO TABLE @DATA(IT_THMT_CALC_TYPES2).
*--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_THMT_CALC_TYPES INDEX 1 INTO DATA(WA_THMT_CALC_TYPES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<THMT_CALC_TYPES>-MANDT = 1.
<THMT_CALC_TYPES>-CALC_TYPE = 1.
<THMT_CALC_TYPES>-CALC_CATEGORY = 1.
<THMT_CALC_TYPES>-OFFSET_CALC_CAT = 1.
<THMT_CALC_TYPES>-AUSWT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_THMT_CALC_TYPES-NPV_TYPE, sy-vline,
  WA_THMT_CALC_TYPES-KORART, sy-vline,
  WA_THMT_CALC_TYPES-NPV_FIX, sy-vline,
  WA_THMT_CALC_TYPES-NPV_RATE_CAT, sy-vline,
  WA_THMT_CALC_TYPES-AUTO_INCEP, sy-vline,
  WA_THMT_CALC_TYPES-AUTO_EXEC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_THMT_CALC_TYPES 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_THMT_CALC_TYPES 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_THMT_CALC_TYPES INTO WA_THMT_CALC_TYPES.


*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_THMT_CALC_TYPES_STR, 
MANDT TYPE STRING,
CALC_TYPE TYPE STRING,
CALC_CATEGORY TYPE STRING,
OFFSET_CALC_CAT TYPE STRING,
AUSWT TYPE STRING,
NPV_TYPE TYPE STRING,
KORART TYPE STRING,
NPV_FIX TYPE STRING,
NPV_RATE_CAT TYPE STRING,
AUTO_INCEP TYPE STRING,
AUTO_EXEC TYPE STRING,
THRESHOLD TYPE STRING,
TRANS_SPEED TYPE STRING,
AUTO_NO_CLEAN TYPE STRING,
FLG_SAVE_LOG TYPE STRING,
AUSWT2 TYPE STRING,
NPV_TYPE2 TYPE STRING,
NPV_TYPE3 TYPE STRING,
HYPO_PERF TYPE STRING,
SIGNIFICANCE TYPE STRING,
EFF_TEST_METHOD TYPE STRING,
HYPO_CREATE_AUTO TYPE STRING,
HD_CREATION_CAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_THMT_CALC_TYPES_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_THMT_CALC_TYPES_STR-MANDT sy-vline 
WA_THMT_CALC_TYPES_STR-CALC_TYPE sy-vline 
WA_THMT_CALC_TYPES_STR-CALC_CATEGORY sy-vline 
WA_THMT_CALC_TYPES_STR-OFFSET_CALC_CAT sy-vline 
WA_THMT_CALC_TYPES_STR-AUSWT sy-vline 
WA_THMT_CALC_TYPES_STR-NPV_TYPE sy-vline 
WA_THMT_CALC_TYPES_STR-KORART sy-vline 
WA_THMT_CALC_TYPES_STR-NPV_FIX sy-vline 
WA_THMT_CALC_TYPES_STR-NPV_RATE_CAT sy-vline 
WA_THMT_CALC_TYPES_STR-AUTO_INCEP sy-vline 
WA_THMT_CALC_TYPES_STR-AUTO_EXEC sy-vline 
WA_THMT_CALC_TYPES_STR-THRESHOLD sy-vline 
WA_THMT_CALC_TYPES_STR-TRANS_SPEED sy-vline 
WA_THMT_CALC_TYPES_STR-AUTO_NO_CLEAN sy-vline 
WA_THMT_CALC_TYPES_STR-FLG_SAVE_LOG sy-vline 
WA_THMT_CALC_TYPES_STR-AUSWT2 sy-vline 
WA_THMT_CALC_TYPES_STR-NPV_TYPE2 sy-vline 
WA_THMT_CALC_TYPES_STR-NPV_TYPE3 sy-vline 
WA_THMT_CALC_TYPES_STR-HYPO_PERF sy-vline 
WA_THMT_CALC_TYPES_STR-SIGNIFICANCE sy-vline 
WA_THMT_CALC_TYPES_STR-EFF_TEST_METHOD sy-vline 
WA_THMT_CALC_TYPES_STR-HYPO_CREATE_AUTO sy-vline 
WA_THMT_CALC_TYPES_STR-HD_CREATION_CAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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