ABAP Select data from SAP table /LTB/MC_PROJ 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 /LTB/MC_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 /LTB/MC_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 /LTB/MC_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_/LTB/MC_PROJ TYPE STANDARD TABLE OF /LTB/MC_PROJ,
      WA_/LTB/MC_PROJ TYPE /LTB/MC_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: </LTB/MC_PROJ> TYPE /LTB/MC_PROJ.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /LTB/MC_PROJ
  INTO TABLE IT_/LTB/MC_PROJ.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /LTB/MC_PROJ
*  INTO TABLE @DATA(IT_/LTB/MC_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_/LTB/MC_PROJ INDEX 1 INTO DATA(WA_/LTB/MC_PROJ2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/LTB/MC_PROJ ASSIGNING </LTB/MC_PROJ>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</LTB/MC_PROJ>-MANDT = 1.
</LTB/MC_PROJ>-UUID = 1.
</LTB/MC_PROJ>-APPROACH = 1.
</LTB/MC_PROJ>-SCENARIO = 1.
</LTB/MC_PROJ>-CRE_USER = 1.

ENDLOOP.

LOOP AT IT_/LTB/MC_PROJ INTO WA_/LTB/MC_PROJ.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/LTB/MC_PROJ-CRE_TIME, sy-vline,
  WA_/LTB/MC_PROJ-FINISHED, sy-vline,
  WA_/LTB/MC_PROJ-FINISH_USER, sy-vline,
  WA_/LTB/MC_PROJ-FINISH_TIME, sy-vline,
  WA_/LTB/MC_PROJ-TO_BE_DELETED, sy-vline,
  WA_/LTB/MC_PROJ-IMPORTED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/LTB/MC_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_/LTB/MC_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_/LTB/MC_PROJ INTO WA_/LTB/MC_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_/LTB/MC_PROJ_STR, 
MANDT TYPE STRING,
UUID TYPE STRING,
APPROACH TYPE STRING,
SCENARIO TYPE STRING,
CRE_USER TYPE STRING,
CRE_TIME TYPE STRING,
FINISHED TYPE STRING,
FINISH_USER TYPE STRING,
FINISH_TIME TYPE STRING,
TO_BE_DELETED TYPE STRING,
IMPORTED TYPE STRING,
TOTAL_JOB_NUMBER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/LTB/MC_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_/LTB/MC_PROJ_STR-MANDT sy-vline 
WA_/LTB/MC_PROJ_STR-UUID sy-vline 
WA_/LTB/MC_PROJ_STR-APPROACH sy-vline 
WA_/LTB/MC_PROJ_STR-SCENARIO sy-vline 
WA_/LTB/MC_PROJ_STR-CRE_USER sy-vline 
WA_/LTB/MC_PROJ_STR-CRE_TIME sy-vline 
WA_/LTB/MC_PROJ_STR-FINISHED sy-vline 
WA_/LTB/MC_PROJ_STR-FINISH_USER sy-vline 
WA_/LTB/MC_PROJ_STR-FINISH_TIME sy-vline 
WA_/LTB/MC_PROJ_STR-TO_BE_DELETED sy-vline 
WA_/LTB/MC_PROJ_STR-IMPORTED sy-vline 
WA_/LTB/MC_PROJ_STR-TOTAL_JOB_NUMBER sy-vline      INTO ld_text SEPARATED BY SPACE.

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