ABAP Select data from SAP table ACMRTAUNIT into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ACMRTAUNIT
*  INTO TABLE @DATA(IT_ACMRTAUNIT2).
*--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_ACMRTAUNIT INDEX 1 INTO DATA(WA_ACMRTAUNIT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ACMRTAUNIT>-MANDT = 1.
<ACMRTAUNIT>-ID = 1.
<ACMRTAUNIT>-CHAR6 = 1.
<ACMRTAUNIT>-CHAR20 = 1.
<ACMRTAUNIT>-SSTRING10 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ACMRTAUNIT-NUMC8, sy-vline,
  WA_ACMRTAUNIT-DATS, sy-vline,
  WA_ACMRTAUNIT-TIMS, sy-vline,
  WA_ACMRTAUNIT-DEC52, sy-vline,
  WA_ACMRTAUNIT-INT1, sy-vline,
  WA_ACMRTAUNIT-INT2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ACMRTAUNIT 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_ACMRTAUNIT 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_ACMRTAUNIT INTO WA_ACMRTAUNIT.


*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_ACMRTAUNIT_STR, 
MANDT TYPE STRING,
ID TYPE STRING,
CHAR6 TYPE STRING,
CHAR20 TYPE STRING,
SSTRING10 TYPE STRING,
NUMC8 TYPE STRING,
DATS TYPE STRING,
TIMS TYPE STRING,
DEC52 TYPE STRING,
INT1 TYPE STRING,
INT2 TYPE STRING,
INT4 TYPE STRING,
INT8 TYPE STRING,
DECFLOAT16 TYPE STRING,
DECFLOAT34 TYPE STRING,
DEC62 TYPE STRING,
D16D_10_3 TYPE STRING,
GUID TYPE STRING,
DATN TYPE STRING,
TIMN TYPE STRING,
D16N TYPE STRING,
D34N TYPE STRING,
UTCLONG TYPE STRING,
TESTCOMMENT TYPE STRING,
STATE1 TYPE STRING,
STATE2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ACMRTAUNIT_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_ACMRTAUNIT_STR-MANDT sy-vline 
WA_ACMRTAUNIT_STR-ID sy-vline 
WA_ACMRTAUNIT_STR-CHAR6 sy-vline 
WA_ACMRTAUNIT_STR-CHAR20 sy-vline 
WA_ACMRTAUNIT_STR-SSTRING10 sy-vline 
WA_ACMRTAUNIT_STR-NUMC8 sy-vline 
WA_ACMRTAUNIT_STR-DATS sy-vline 
WA_ACMRTAUNIT_STR-TIMS sy-vline 
WA_ACMRTAUNIT_STR-DEC52 sy-vline 
WA_ACMRTAUNIT_STR-INT1 sy-vline 
WA_ACMRTAUNIT_STR-INT2 sy-vline 
WA_ACMRTAUNIT_STR-INT4 sy-vline 
WA_ACMRTAUNIT_STR-INT8 sy-vline 
WA_ACMRTAUNIT_STR-DECFLOAT16 sy-vline 
WA_ACMRTAUNIT_STR-DECFLOAT34 sy-vline 
WA_ACMRTAUNIT_STR-DEC62 sy-vline 
WA_ACMRTAUNIT_STR-D16D_10_3 sy-vline 
WA_ACMRTAUNIT_STR-GUID sy-vline 
WA_ACMRTAUNIT_STR-DATN sy-vline 
WA_ACMRTAUNIT_STR-TIMN sy-vline 
WA_ACMRTAUNIT_STR-D16N sy-vline 
WA_ACMRTAUNIT_STR-D34N sy-vline 
WA_ACMRTAUNIT_STR-UTCLONG sy-vline 
WA_ACMRTAUNIT_STR-TESTCOMMENT sy-vline 
WA_ACMRTAUNIT_STR-STATE1 sy-vline 
WA_ACMRTAUNIT_STR-STATE2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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