ABAP Select data from SAP table CMATDAILYDMND into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMATDAILYDMND
*  INTO TABLE @DATA(IT_CMATDAILYDMND2).
*--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_CMATDAILYDMND INDEX 1 INTO DATA(WA_CMATDAILYDMND2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMATDAILYDMND>-MANDT = 1.
<CMATDAILYDMND>-MATERIAL = 1.
<CMATDAILYDMND>-PLANT = 1.
<CMATDAILYDMND>-MRPAREA = 1.
<CMATDAILYDMND>-POSTINGDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMATDAILYDMND-CURRENTAVERAGEDAILYUSAGE, sy-vline,
  WA_CMATDAILYDMND-PLNDINDEPRQMTQUANTITY, sy-vline,
  WA_CMATDAILYDMND-QUANTITYINBASEUNIT, sy-vline,
  WA_CMATDAILYDMND-DAILYPLNDINDEPRQMTQUANTITY, sy-vline,
  WA_CMATDAILYDMND-WEEKLYPLNDINDEPRQMTQTYPERDAY, sy-vline,
  WA_CMATDAILYDMND-MONTHLYPLNDINDEPRQMTQTYPERDAY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMATDAILYDMND 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_CMATDAILYDMND 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_CMATDAILYDMND INTO WA_CMATDAILYDMND.


*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 MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CMATDAILYDMND-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMATDAILYDMND-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MATERIALBASEUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CMATDAILYDMND-MATERIALBASEUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMATDAILYDMND-MATERIALBASEUNIT.
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_CMATDAILYDMND_STR, 
MANDT TYPE STRING,
MATERIAL TYPE STRING,
PLANT TYPE STRING,
MRPAREA TYPE STRING,
POSTINGDATE TYPE STRING,
CURRENTAVERAGEDAILYUSAGE TYPE STRING,
PLNDINDEPRQMTQUANTITY TYPE STRING,
QUANTITYINBASEUNIT TYPE STRING,
DAILYPLNDINDEPRQMTQUANTITY TYPE STRING,
WEEKLYPLNDINDEPRQMTQTYPERDAY TYPE STRING,
MONTHLYPLNDINDEPRQMTQTYPERDAY TYPE STRING,
TOTALWEEKLYPLNDINDEPRQMTQTY TYPE STRING,
TOTALMONTHLYPLNDINDEPRQMTQTY TYPE STRING,
MATERIALBASEUNIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMATDAILYDMND_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_CMATDAILYDMND_STR-MANDT sy-vline 
WA_CMATDAILYDMND_STR-MATERIAL sy-vline 
WA_CMATDAILYDMND_STR-PLANT sy-vline 
WA_CMATDAILYDMND_STR-MRPAREA sy-vline 
WA_CMATDAILYDMND_STR-POSTINGDATE sy-vline 
WA_CMATDAILYDMND_STR-CURRENTAVERAGEDAILYUSAGE sy-vline 
WA_CMATDAILYDMND_STR-PLNDINDEPRQMTQUANTITY sy-vline 
WA_CMATDAILYDMND_STR-QUANTITYINBASEUNIT sy-vline 
WA_CMATDAILYDMND_STR-DAILYPLNDINDEPRQMTQUANTITY sy-vline 
WA_CMATDAILYDMND_STR-WEEKLYPLNDINDEPRQMTQTYPERDAY sy-vline 
WA_CMATDAILYDMND_STR-MONTHLYPLNDINDEPRQMTQTYPERDAY sy-vline 
WA_CMATDAILYDMND_STR-TOTALWEEKLYPLNDINDEPRQMTQTY sy-vline 
WA_CMATDAILYDMND_STR-TOTALMONTHLYPLNDINDEPRQMTQTY sy-vline 
WA_CMATDAILYDMND_STR-MATERIALBASEUNIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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