ABAP Select data from SAP table CRSHGANTTASG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CRSHGANTTASG
*  INTO TABLE @DATA(IT_CRSHGANTTASG2).
*--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_CRSHGANTTASG INDEX 1 INTO DATA(WA_CRSHGANTTASG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CRSHGANTTASG>-MANDT = 1.
<CRSHGANTTASG>-GANTTASSIGNMENTUUID = 1.
<CRSHGANTTASG>-PROJASSIGNMENTUUID = 1.
<CRSHGANTTASG>-EMPLOYMENTINTERNALID = 1.
<CRSHGANTTASG>-RESOURCEDEMANDUUID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CRSHGANTTASG-PROJASSIGNMENTSTARTDATE, sy-vline,
  WA_CRSHGANTTASG-PROJASSIGNMENTENDDATE, sy-vline,
  WA_CRSHGANTTASG-COMPANYCODE, sy-vline,
  WA_CRSHGANTTASG-COSTCENTER, sy-vline,
  WA_CRSHGANTTASG-PROJASSIGNMENTDURATION, sy-vline,
  WA_CRSHGANTTASG-ISEDITABLE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CRSHGANTTASG 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_CRSHGANTTASG 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_CRSHGANTTASG INTO WA_CRSHGANTTASG.


*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 ALPHA, internal->external for field COSTCENTER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CRSHGANTTASG-COSTCENTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRSHGANTTASG-COSTCENTER.
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_CRSHGANTTASG_STR, 
MANDT TYPE STRING,
GANTTASSIGNMENTUUID TYPE STRING,
PROJASSIGNMENTUUID TYPE STRING,
EMPLOYMENTINTERNALID TYPE STRING,
RESOURCEDEMANDUUID TYPE STRING,
PROJASSIGNMENTSTARTDATE TYPE STRING,
PROJASSIGNMENTENDDATE TYPE STRING,
COMPANYCODE TYPE STRING,
COSTCENTER TYPE STRING,
PROJASSIGNMENTDURATION TYPE STRING,
ISEDITABLE TYPE STRING,
ENGAGEMENTPROJECTRESOURCE TYPE STRING,
ENGAGEMENTPROJECTUUID TYPE STRING,
WORKPACKAGEUUID TYPE STRING,
ENGAGEMENTPROJECT TYPE STRING,
WORKITEM TYPE STRING,
CUSTOMERFULLNAME TYPE STRING,
WORKPACKAGENAME TYPE STRING,
ENGAGEMENTPROJRESOURCETEXT TYPE STRING,
ENGAGEMENTPROJECTCATEGORY TYPE STRING,
SERVICEORGANIZATION TYPE STRING,
PROJECTVISIBILITY TYPE STRING,
ENGAGEMENTPROJECTSTAGE TYPE STRING,
ROLE TYPE STRING,
ASSIGNEDRESAUTHZNGRP TYPE STRING,
ISBUSPRPSCMPLTDASSIGNEDRES TYPE STRING,
PROJASSIGNMENTCOLOR TYPE STRING,
PROJASSIGNMENTDESCRIPTION TYPE STRING,
ISPROJASSIGNMENTCOLLISION TYPE STRING,
ISPROJASSIGNMENTONHEADERROW TYPE STRING,
GANTTCHILDASGNMERGEDASGNCOUNT TYPE STRING,
GANTTCHILDASGNINDIVIDUALDUR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CRSHGANTTASG_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_CRSHGANTTASG_STR-MANDT sy-vline 
WA_CRSHGANTTASG_STR-GANTTASSIGNMENTUUID sy-vline 
WA_CRSHGANTTASG_STR-PROJASSIGNMENTUUID sy-vline 
WA_CRSHGANTTASG_STR-EMPLOYMENTINTERNALID sy-vline 
WA_CRSHGANTTASG_STR-RESOURCEDEMANDUUID sy-vline 
WA_CRSHGANTTASG_STR-PROJASSIGNMENTSTARTDATE sy-vline 
WA_CRSHGANTTASG_STR-PROJASSIGNMENTENDDATE sy-vline 
WA_CRSHGANTTASG_STR-COMPANYCODE sy-vline 
WA_CRSHGANTTASG_STR-COSTCENTER sy-vline 
WA_CRSHGANTTASG_STR-PROJASSIGNMENTDURATION sy-vline 
WA_CRSHGANTTASG_STR-ISEDITABLE sy-vline 
WA_CRSHGANTTASG_STR-ENGAGEMENTPROJECTRESOURCE sy-vline 
WA_CRSHGANTTASG_STR-ENGAGEMENTPROJECTUUID sy-vline 
WA_CRSHGANTTASG_STR-WORKPACKAGEUUID sy-vline 
WA_CRSHGANTTASG_STR-ENGAGEMENTPROJECT sy-vline 
WA_CRSHGANTTASG_STR-WORKITEM sy-vline 
WA_CRSHGANTTASG_STR-CUSTOMERFULLNAME sy-vline 
WA_CRSHGANTTASG_STR-WORKPACKAGENAME sy-vline 
WA_CRSHGANTTASG_STR-ENGAGEMENTPROJRESOURCETEXT sy-vline 
WA_CRSHGANTTASG_STR-ENGAGEMENTPROJECTCATEGORY sy-vline 
WA_CRSHGANTTASG_STR-SERVICEORGANIZATION sy-vline 
WA_CRSHGANTTASG_STR-PROJECTVISIBILITY sy-vline 
WA_CRSHGANTTASG_STR-ENGAGEMENTPROJECTSTAGE sy-vline 
WA_CRSHGANTTASG_STR-ROLE sy-vline 
WA_CRSHGANTTASG_STR-ASSIGNEDRESAUTHZNGRP sy-vline 
WA_CRSHGANTTASG_STR-ISBUSPRPSCMPLTDASSIGNEDRES sy-vline 
WA_CRSHGANTTASG_STR-PROJASSIGNMENTCOLOR sy-vline 
WA_CRSHGANTTASG_STR-PROJASSIGNMENTDESCRIPTION sy-vline 
WA_CRSHGANTTASG_STR-ISPROJASSIGNMENTCOLLISION sy-vline 
WA_CRSHGANTTASG_STR-ISPROJASSIGNMENTONHEADERROW sy-vline 
WA_CRSHGANTTASG_STR-GANTTCHILDASGNMERGEDASGNCOUNT sy-vline 
WA_CRSHGANTTASG_STR-GANTTCHILDASGNINDIVIDUALDUR sy-vline      INTO ld_text SEPARATED BY SPACE.

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