ABAP Select data from SAP table CACNS_PM_PROJ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CACNS_PM_PROJ
*  INTO TABLE @DATA(IT_CACNS_PM_PROJ2).
*--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_CACNS_PM_PROJ INDEX 1 INTO DATA(WA_CACNS_PM_PROJ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CACNS_PM_PROJ>-MANDT = 1.
<CACNS_PM_PROJ>-HASHCODE = 1.
<CACNS_PM_PROJ>-FUNCTION = 1.
<CACNS_PM_PROJ>-AREA = 1.
<CACNS_PM_PROJ>-CUSCTRKEY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CACNS_PM_PROJ-DESCRIPTION, sy-vline,
  WA_CACNS_PM_PROJ-START_DATE, sy-vline,
  WA_CACNS_PM_PROJ-END_DATE, sy-vline,
  WA_CACNS_PM_PROJ-CUSTY, sy-vline,
  WA_CACNS_PM_PROJ-CUSID, sy-vline,
  WA_CACNS_PM_PROJ-CUSTX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CACNS_PM_PROJ 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_CACNS_PM_PROJ 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_CACNS_PM_PROJ INTO WA_CACNS_PM_PROJ.


*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_CACNS_PM_PROJ_STR, 
MANDT TYPE STRING,
HASHCODE TYPE STRING,
FUNCTION TYPE STRING,
AREA TYPE STRING,
CUSCTRKEY TYPE STRING,
DESCRIPTION TYPE STRING,
START_DATE TYPE STRING,
END_DATE TYPE STRING,
CUSTY TYPE STRING,
CUSID TYPE STRING,
CUSTX TYPE STRING,
CUSMATCH TYPE STRING,
CUSCOUNTRY TYPE STRING,
CUSTOWN TYPE STRING,
CUSTOWNMATCH TYPE STRING,
RESPTY TYPE STRING,
RESPID TYPE STRING,
RESPTX TYPE STRING,
RESPMATCH TYPE STRING,
ATTACHMENT TYPE STRING,
CREATE_DATE TYPE STRING,
CREATOR TYPE STRING,
DAYS_NEEDED TYPE STRING,
PERCENT TYPE STRING,
STATUS TYPE STRING,
SUBAREA TYPE STRING,
RESERVED1 TYPE STRING,
RESERVED2 TYPE STRING,
RESERVED3 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CACNS_PM_PROJ_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_CACNS_PM_PROJ_STR-MANDT sy-vline 
WA_CACNS_PM_PROJ_STR-HASHCODE sy-vline 
WA_CACNS_PM_PROJ_STR-FUNCTION sy-vline 
WA_CACNS_PM_PROJ_STR-AREA sy-vline 
WA_CACNS_PM_PROJ_STR-CUSCTRKEY sy-vline 
WA_CACNS_PM_PROJ_STR-DESCRIPTION sy-vline 
WA_CACNS_PM_PROJ_STR-START_DATE sy-vline 
WA_CACNS_PM_PROJ_STR-END_DATE sy-vline 
WA_CACNS_PM_PROJ_STR-CUSTY sy-vline 
WA_CACNS_PM_PROJ_STR-CUSID sy-vline 
WA_CACNS_PM_PROJ_STR-CUSTX sy-vline 
WA_CACNS_PM_PROJ_STR-CUSMATCH sy-vline 
WA_CACNS_PM_PROJ_STR-CUSCOUNTRY sy-vline 
WA_CACNS_PM_PROJ_STR-CUSTOWN sy-vline 
WA_CACNS_PM_PROJ_STR-CUSTOWNMATCH sy-vline 
WA_CACNS_PM_PROJ_STR-RESPTY sy-vline 
WA_CACNS_PM_PROJ_STR-RESPID sy-vline 
WA_CACNS_PM_PROJ_STR-RESPTX sy-vline 
WA_CACNS_PM_PROJ_STR-RESPMATCH sy-vline 
WA_CACNS_PM_PROJ_STR-ATTACHMENT sy-vline 
WA_CACNS_PM_PROJ_STR-CREATE_DATE sy-vline 
WA_CACNS_PM_PROJ_STR-CREATOR sy-vline 
WA_CACNS_PM_PROJ_STR-DAYS_NEEDED sy-vline 
WA_CACNS_PM_PROJ_STR-PERCENT sy-vline 
WA_CACNS_PM_PROJ_STR-STATUS sy-vline 
WA_CACNS_PM_PROJ_STR-SUBAREA sy-vline 
WA_CACNS_PM_PROJ_STR-RESERVED1 sy-vline 
WA_CACNS_PM_PROJ_STR-RESERVED2 sy-vline 
WA_CACNS_PM_PROJ_STR-RESERVED3 sy-vline      INTO ld_text SEPARATED BY SPACE.

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