ABAP Select data from SAP table CRMC_TAX_P into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CRMC_TAX_P
*  INTO TABLE @DATA(IT_CRMC_TAX_P2).
*--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_CRMC_TAX_P INDEX 1 INTO DATA(WA_CRMC_TAX_P2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CRMC_TAX_P>-MANDANT = 1.
<CRMC_TAX_P>-PARTNER = 1.
<CRMC_TAX_P>-INTVER = 1.
<CRMC_TAX_P>-RFCDEST = 1.
<CRMC_TAX_P>-LENGTH1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CRMC_TAX_P-LENGTH2, sy-vline,
  WA_CRMC_TAX_P-LENGTH3, sy-vline,
  WA_CRMC_TAX_P-LENGTH4, sy-vline,
  WA_CRMC_TAX_P-INTERNAL, sy-vline,
  WA_CRMC_TAX_P-XCORRECT, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_CRMC_TAX_P 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_CRMC_TAX_P 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_CRMC_TAX_P INTO WA_CRMC_TAX_P.


*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_CRMC_TAX_P_STR, 
MANDANT TYPE STRING,
PARTNER TYPE STRING,
INTVER TYPE STRING,
RFCDEST TYPE STRING,
LENGTH1 TYPE STRING,
LENGTH2 TYPE STRING,
LENGTH3 TYPE STRING,
LENGTH4 TYPE STRING,
INTERNAL TYPE STRING,
XCORRECT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CRMC_TAX_P_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_CRMC_TAX_P_STR-MANDANT sy-vline 
WA_CRMC_TAX_P_STR-PARTNER sy-vline 
WA_CRMC_TAX_P_STR-INTVER sy-vline 
WA_CRMC_TAX_P_STR-RFCDEST sy-vline 
WA_CRMC_TAX_P_STR-LENGTH1 sy-vline 
WA_CRMC_TAX_P_STR-LENGTH2 sy-vline 
WA_CRMC_TAX_P_STR-LENGTH3 sy-vline 
WA_CRMC_TAX_P_STR-LENGTH4 sy-vline 
WA_CRMC_TAX_P_STR-INTERNAL sy-vline 
WA_CRMC_TAX_P_STR-XCORRECT sy-vline      INTO ld_text SEPARATED BY SPACE.

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