ABAP Select data from SAP table CRMT_REPORT_ACTIVITY_H_LDB1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CRMT_REPORT_ACTIVITY_H_LDB1 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 CRMT_REPORT_ACTIVITY_H_LDB1. 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 CRMT_REPORT_ACTIVITY_H_LDB1 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_CRMT_REPORT_ACTIVITY_H_LDB1 TYPE STANDARD TABLE OF CRMT_REPORT_ACTIVITY_H_LDB1,
      WA_CRMT_REPORT_ACTIVITY_H_LDB1 TYPE CRMT_REPORT_ACTIVITY_H_LDB1,
      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: <CRMT_REPORT_ACTIVITY_H_LDB1> TYPE CRMT_REPORT_ACTIVITY_H_LDB1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CRMT_REPORT_ACTIVITY_H_LDB1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CRMT_REPORT_ACTIVITY_H_LDB1
  INTO TABLE IT_CRMT_REPORT_ACTIVITY_H_LDB1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CRMT_REPORT_ACTIVITY_H_LDB1
*  INTO TABLE @DATA(IT_CRMT_REPORT_ACTIVITY_H_LDB12).
*--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_CRMT_REPORT_ACTIVITY_H_LDB1 INDEX 1 INTO DATA(WA_CRMT_REPORT_ACTIVITY_H_LDB12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CRMT_REPORT_ACTIVITY_H_LDB1 ASSIGNING <CRMT_REPORT_ACTIVITY_H_LDB1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CRMT_REPORT_ACTIVITY_H_LDB1>-CLIENT = 1.
<CRMT_REPORT_ACTIVITY_H_LDB1>-GUID = 1.
<CRMT_REPORT_ACTIVITY_H_LDB1>-CATEGORY = 1.
<CRMT_REPORT_ACTIVITY_H_LDB1>-PRIORITY = 1.
<CRMT_REPORT_ACTIVITY_H_LDB1>-OBJECTIVE = 1.

ENDLOOP.

LOOP AT IT_CRMT_REPORT_ACTIVITY_H_LDB1 INTO WA_CRMT_REPORT_ACTIVITY_H_LDB1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CRMT_REPORT_ACTIVITY_H_LDB1-DIRECTION, sy-vline,
  WA_CRMT_REPORT_ACTIVITY_H_LDB1-EXTERN_ACT_ID, sy-vline,
  WA_CRMT_REPORT_ACTIVITY_H_LDB1-ADDRESS_ID, sy-vline,
  WA_CRMT_REPORT_ACTIVITY_H_LDB1-ACT_LOCATION, sy-vline,
  WA_CRMT_REPORT_ACTIVITY_H_LDB1-PRIVATE_FLAG, sy-vline,
  WA_CRMT_REPORT_ACTIVITY_H_LDB1-COMPLETION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CRMT_REPORT_ACTIVITY_H_LDB1 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_CRMT_REPORT_ACTIVITY_H_LDB1 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_CRMT_REPORT_ACTIVITY_H_LDB1 INTO WA_CRMT_REPORT_ACTIVITY_H_LDB1.


*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 ADDRESS_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CRMT_REPORT_ACTIVITY_H_LDB1-ADDRESS_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMT_REPORT_ACTIVITY_H_LDB1-ADDRESS_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MAINPARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CRMT_REPORT_ACTIVITY_H_LDB1-MAINPARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMT_REPORT_ACTIVITY_H_LDB1-MAINPARTNER.
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_CRMT_REPORT_ACTIVITY_H_LDB1_STR, 
CLIENT TYPE STRING,
GUID TYPE STRING,
CATEGORY TYPE STRING,
PRIORITY TYPE STRING,
OBJECTIVE TYPE STRING,
DIRECTION TYPE STRING,
EXTERN_ACT_ID TYPE STRING,
ADDRESS_ID TYPE STRING,
ACT_LOCATION TYPE STRING,
PRIVATE_FLAG TYPE STRING,
COMPLETION TYPE STRING,
CALENDAR TYPE STRING,
TASK TYPE STRING,
CLASS TYPE STRING,
CATEGORY_TXT TYPE STRING,
PRIORITY_TXT TYPE STRING,
OBJECTIVE_TXT TYPE STRING,
DIRECTION_TXT TYPE STRING,
ACTIVITY_H_DUMMY TYPE STRING,
MAINPARTNER TYPE STRING,
MAINPARTNERFCT TYPE STRING,
PARTNER_FCT_TXT TYPE STRING,
PARTNER_FCT_SHO TYPE STRING,
PLANNEDDATEFROM TYPE STRING,
PLANNEDDATETO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CRMT_REPORT_ACTIVITY_H_LDB1_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_CRMT_REPORT_ACTIVITY_H_LDB1_STR-CLIENT sy-vline 
WA_CRMT_REPORT_ACTIVITY_H_LDB1_STR-GUID sy-vline 
WA_CRMT_REPORT_ACTIVITY_H_LDB1_STR-CATEGORY sy-vline 
WA_CRMT_REPORT_ACTIVITY_H_LDB1_STR-PRIORITY sy-vline 
WA_CRMT_REPORT_ACTIVITY_H_LDB1_STR-OBJECTIVE sy-vline 
WA_CRMT_REPORT_ACTIVITY_H_LDB1_STR-DIRECTION sy-vline 
WA_CRMT_REPORT_ACTIVITY_H_LDB1_STR-EXTERN_ACT_ID sy-vline 
WA_CRMT_REPORT_ACTIVITY_H_LDB1_STR-ADDRESS_ID sy-vline 
WA_CRMT_REPORT_ACTIVITY_H_LDB1_STR-ACT_LOCATION sy-vline 
WA_CRMT_REPORT_ACTIVITY_H_LDB1_STR-PRIVATE_FLAG sy-vline 
WA_CRMT_REPORT_ACTIVITY_H_LDB1_STR-COMPLETION sy-vline 
WA_CRMT_REPORT_ACTIVITY_H_LDB1_STR-CALENDAR sy-vline 
WA_CRMT_REPORT_ACTIVITY_H_LDB1_STR-TASK sy-vline 
WA_CRMT_REPORT_ACTIVITY_H_LDB1_STR-CLASS sy-vline 
WA_CRMT_REPORT_ACTIVITY_H_LDB1_STR-CATEGORY_TXT sy-vline 
WA_CRMT_REPORT_ACTIVITY_H_LDB1_STR-PRIORITY_TXT sy-vline 
WA_CRMT_REPORT_ACTIVITY_H_LDB1_STR-OBJECTIVE_TXT sy-vline 
WA_CRMT_REPORT_ACTIVITY_H_LDB1_STR-DIRECTION_TXT sy-vline 
WA_CRMT_REPORT_ACTIVITY_H_LDB1_STR-ACTIVITY_H_DUMMY sy-vline 
WA_CRMT_REPORT_ACTIVITY_H_LDB1_STR-MAINPARTNER sy-vline 
WA_CRMT_REPORT_ACTIVITY_H_LDB1_STR-MAINPARTNERFCT sy-vline 
WA_CRMT_REPORT_ACTIVITY_H_LDB1_STR-PARTNER_FCT_TXT sy-vline 
WA_CRMT_REPORT_ACTIVITY_H_LDB1_STR-PARTNER_FCT_SHO sy-vline 
WA_CRMT_REPORT_ACTIVITY_H_LDB1_STR-PLANNEDDATEFROM sy-vline 
WA_CRMT_REPORT_ACTIVITY_H_LDB1_STR-PLANNEDDATETO sy-vline      INTO ld_text SEPARATED BY SPACE.

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