ABAP Select data from SAP table CRMD_IM_ML_HEAD_DS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CRMD_IM_ML_HEAD_DS
*  INTO TABLE @DATA(IT_CRMD_IM_ML_HEAD_DS2).
*--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_CRMD_IM_ML_HEAD_DS INDEX 1 INTO DATA(WA_CRMD_IM_ML_HEAD_DS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CRMD_IM_ML_HEAD_DS>-MANDT = 1.
<CRMD_IM_ML_HEAD_DS>-ML_GUID_H = 1.
<CRMD_IM_ML_HEAD_DS>-PROJECT_GUID = 1.
<CRMD_IM_ML_HEAD_DS>-TASK_GUID = 1.
<CRMD_IM_ML_HEAD_DS>-LOY_MSH_GUID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CRMD_IM_ML_HEAD_DS-TARGETGRP_GUID, sy-vline,
  WA_CRMD_IM_ML_HEAD_DS-SMARTFORM, sy-vline,
  WA_CRMD_IM_ML_HEAD_DS-CREATED_AT, sy-vline,
  WA_CRMD_IM_ML_HEAD_DS-SUM_MAILS, sy-vline,
  WA_CRMD_IM_ML_HEAD_DS-SUM_SUC_MAILS, sy-vline,
  WA_CRMD_IM_ML_HEAD_DS-SUM_HARD_BOUNCES, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CRMD_IM_ML_HEAD_DS 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_CRMD_IM_ML_HEAD_DS 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_CRMD_IM_ML_HEAD_DS INTO WA_CRMD_IM_ML_HEAD_DS.


*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 CGPLP, internal->external for field PROJECT_GUID
CALL FUNCTION 'CONVERSION_EXIT_CGPLP_OUTPUT'
  EXPORTING
    input =                      WA_CRMD_IM_ML_HEAD_DS-PROJECT_GUID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMD_IM_ML_HEAD_DS-PROJECT_GUID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CGPLP, internal->external for field TASK_GUID
CALL FUNCTION 'CONVERSION_EXIT_CGPLP_OUTPUT'
  EXPORTING
    input =                      WA_CRMD_IM_ML_HEAD_DS-TASK_GUID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMD_IM_ML_HEAD_DS-TASK_GUID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field CREATED_AT
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_CRMD_IM_ML_HEAD_DS-CREATED_AT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMD_IM_ML_HEAD_DS-CREATED_AT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SXIDN, internal->external for field E_ADDRESS
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_CRMD_IM_ML_HEAD_DS-E_ADDRESS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMD_IM_ML_HEAD_DS-E_ADDRESS.
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_CRMD_IM_ML_HEAD_DS_STR, 
MANDT TYPE STRING,
ML_GUID_H TYPE STRING,
PROJECT_GUID TYPE STRING,
TASK_GUID TYPE STRING,
LOY_MSH_GUID TYPE STRING,
TARGETGRP_GUID TYPE STRING,
SMARTFORM TYPE STRING,
CREATED_AT TYPE STRING,
SUM_MAILS TYPE STRING,
SUM_SUC_MAILS TYPE STRING,
SUM_HARD_BOUNCES TYPE STRING,
SUM_SOFT_BOUNCES TYPE STRING,
E_ADDRESS TYPE STRING,
MAIL_DEL TYPE STRING,
MAIL_TEST TYPE STRING,
MAIL_FORM TYPE STRING,
FAX_FORM TYPE STRING,
SMS_FORM TYPE STRING,
ALERT_IND TYPE STRING,
EXP_FORM TYPE STRING,
NOT_BY_CAMP_EXEC TYPE STRING,
TABIX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CRMD_IM_ML_HEAD_DS_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_CRMD_IM_ML_HEAD_DS_STR-MANDT sy-vline 
WA_CRMD_IM_ML_HEAD_DS_STR-ML_GUID_H sy-vline 
WA_CRMD_IM_ML_HEAD_DS_STR-PROJECT_GUID sy-vline 
WA_CRMD_IM_ML_HEAD_DS_STR-TASK_GUID sy-vline 
WA_CRMD_IM_ML_HEAD_DS_STR-LOY_MSH_GUID sy-vline 
WA_CRMD_IM_ML_HEAD_DS_STR-TARGETGRP_GUID sy-vline 
WA_CRMD_IM_ML_HEAD_DS_STR-SMARTFORM sy-vline 
WA_CRMD_IM_ML_HEAD_DS_STR-CREATED_AT sy-vline 
WA_CRMD_IM_ML_HEAD_DS_STR-SUM_MAILS sy-vline 
WA_CRMD_IM_ML_HEAD_DS_STR-SUM_SUC_MAILS sy-vline 
WA_CRMD_IM_ML_HEAD_DS_STR-SUM_HARD_BOUNCES sy-vline 
WA_CRMD_IM_ML_HEAD_DS_STR-SUM_SOFT_BOUNCES sy-vline 
WA_CRMD_IM_ML_HEAD_DS_STR-E_ADDRESS sy-vline 
WA_CRMD_IM_ML_HEAD_DS_STR-MAIL_DEL sy-vline 
WA_CRMD_IM_ML_HEAD_DS_STR-MAIL_TEST sy-vline 
WA_CRMD_IM_ML_HEAD_DS_STR-MAIL_FORM sy-vline 
WA_CRMD_IM_ML_HEAD_DS_STR-FAX_FORM sy-vline 
WA_CRMD_IM_ML_HEAD_DS_STR-SMS_FORM sy-vline 
WA_CRMD_IM_ML_HEAD_DS_STR-ALERT_IND sy-vline 
WA_CRMD_IM_ML_HEAD_DS_STR-EXP_FORM sy-vline 
WA_CRMD_IM_ML_HEAD_DS_STR-NOT_BY_CAMP_EXEC sy-vline 
WA_CRMD_IM_ML_HEAD_DS_STR-TABIX sy-vline      INTO ld_text SEPARATED BY SPACE.

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