ABAP Select data from SAP table SATC_S_AC__DB_MESSAGE_HEADER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SATC_S_AC__DB_MESSAGE_HEADER
*  INTO TABLE @DATA(IT_SATC_S_AC__DB_MESSAGE_HEADER2).
*--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_SATC_S_AC__DB_MESSAGE_HEADER INDEX 1 INTO DATA(WA_SATC_S_AC__DB_MESSAGE_HEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SATC_S_AC__DB_MESSAGE_HEADER>-_IS_SELECTED = 1.
<SATC_S_AC__DB_MESSAGE_HEADER>-MARKED_FOR_BSL = 1.
<SATC_S_AC__DB_MESSAGE_HEADER>-ICON = 1.
<SATC_S_AC__DB_MESSAGE_HEADER>-PRIORITY = 1.
<SATC_S_AC__DB_MESSAGE_HEADER>-IS_IMPORTED = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SATC_S_AC__DB_MESSAGE_HEADER-CHECK_TITLE, sy-vline,
  WA_SATC_S_AC__DB_MESSAGE_HEADER-MESSAGE_TITLE, sy-vline,
  WA_SATC_S_AC__DB_MESSAGE_HEADER-OBJ_NAME, sy-vline,
  WA_SATC_S_AC__DB_MESSAGE_HEADER-OBJ_TYPE, sy-vline,
  WA_SATC_S_AC__DB_MESSAGE_HEADER-ICON_XMPT_STATE, sy-vline,
  WA_SATC_S_AC__DB_MESSAGE_HEADER-RESP1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SATC_S_AC__DB_MESSAGE_HEADER 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_SATC_S_AC__DB_MESSAGE_HEADER 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_SATC_S_AC__DB_MESSAGE_HEADER INTO WA_SATC_S_AC__DB_MESSAGE_HEADER.


*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_SATC_S_AC__DB_MESSAGE_HEADER_STR, 
_IS_SELECTED TYPE STRING,
MARKED_FOR_BSL TYPE STRING,
ICON TYPE STRING,
PRIORITY TYPE STRING,
IS_IMPORTED TYPE STRING,
CHECK_TITLE TYPE STRING,
MESSAGE_TITLE TYPE STRING,
OBJ_NAME TYPE STRING,
OBJ_TYPE TYPE STRING,
ICON_XMPT_STATE TYPE STRING,
RESP1 TYPE STRING,
PACKAGE_NAME TYPE STRING,
COMP_SHORT TYPE STRING,
SINCE_DATE TYPE STRING,
COUNTER_GRID TYPE STRING,
_INTERNAL_ID TYPE STRING,
_MODULE_ID TYPE STRING,
_MODULE_MSG_KEY TYPE STRING,
_CHECKSUM TYPE STRING,
_ITEM_ID TYPE STRING,
_EXC_VALIDITY TYPE STRING,
_EXC_KIND TYPE STRING,
_EXC_APPROVAL TYPE STRING,
_SINCE TYPE STRING,
_DELTA_INFO TYPE STRING,
_COMPLETION_STATE TYPE STRING,
_DELTA_STATE TYPE STRING,
_IS_IMPORTED TYPE STRING,
_BASELINE_EFFECT TYPE STRING,
OBJECT_RESPONSIBLE TYPE STRING,
LAST_CHANGED_BY TYPE STRING,
_CHECK_CLASS TYPE STRING,
_LAST_CHANGED_ON TYPE STRING,
NOTE TYPE STRING,
APPLICATION_COMPONENT TYPE STRING,
REF_OBJ_TYPE TYPE STRING,
REF_OBJ_NAME TYPE STRING,
SITEM_STATE TYPE STRING,
CHANGE_CATEGORY TYPE STRING,
ADD_INFO TYPE STRING,
REF_PACKAGE TYPE STRING,
REF_SOFTWARE_COMPONENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SATC_S_AC__DB_MESSAGE_HEADER_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_SATC_S_AC__DB_MESSAGE_HEADER_STR-_IS_SELECTED sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-MARKED_FOR_BSL sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-ICON sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-PRIORITY sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-IS_IMPORTED sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-CHECK_TITLE sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-MESSAGE_TITLE sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-OBJ_NAME sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-OBJ_TYPE sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-ICON_XMPT_STATE sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-RESP1 sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-PACKAGE_NAME sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-COMP_SHORT sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-SINCE_DATE sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-COUNTER_GRID sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-_INTERNAL_ID sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-_MODULE_ID sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-_MODULE_MSG_KEY sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-_CHECKSUM sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-_ITEM_ID sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-_EXC_VALIDITY sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-_EXC_KIND sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-_EXC_APPROVAL sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-_SINCE sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-_DELTA_INFO sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-_COMPLETION_STATE sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-_DELTA_STATE sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-_IS_IMPORTED sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-_BASELINE_EFFECT sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-OBJECT_RESPONSIBLE sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-LAST_CHANGED_BY sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-_CHECK_CLASS sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-_LAST_CHANGED_ON sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-NOTE sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-APPLICATION_COMPONENT sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-REF_OBJ_TYPE sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-REF_OBJ_NAME sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-SITEM_STATE sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-CHANGE_CATEGORY sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-ADD_INFO sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-REF_PACKAGE sy-vline 
WA_SATC_S_AC__DB_MESSAGE_HEADER_STR-REF_SOFTWARE_COMPONENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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