ABAP Select data from SAP table ESH_S_MU_ASSIST_CATEGORY_TEXT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESH_S_MU_ASSIST_CATEGORY_TEXT
*  INTO TABLE @DATA(IT_ESH_S_MU_ASSIST_CATEGORY_TEXT2).
*--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_ESH_S_MU_ASSIST_CATEGORY_TEXT INDEX 1 INTO DATA(WA_ESH_S_MU_ASSIST_CATEGORY_TEXT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ESH_S_MU_ASSIST_CATEGORY_TEXT>-TITLE_MAINT = 1.
<ESH_S_MU_ASSIST_CATEGORY_TEXT>-TITLE_VH = 1.
<ESH_S_MU_ASSIST_CATEGORY_TEXT>-TAB_TITLE = 1.
<ESH_S_MU_ASSIST_CATEGORY_TEXT>-EXPLANATION = 1.
<ESH_S_MU_ASSIST_CATEGORY_TEXT>-CATEGORY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESH_S_MU_ASSIST_CATEGORY_TEXT-DESCR, sy-vline,
  WA_ESH_S_MU_ASSIST_CATEGORY_TEXT-SYSREL, sy-vline,
  WA_ESH_S_MU_ASSIST_CATEGORY_TEXT-BUTTON_SEL, sy-vline,
  WA_ESH_S_MU_ASSIST_CATEGORY_TEXT-BUTTON_CANCEL, sy-vline,
  WA_ESH_S_MU_ASSIST_CATEGORY_TEXT-BUTTON_REL_CREATE, sy-vline,
  WA_ESH_S_MU_ASSIST_CATEGORY_TEXT-BUTTON_REL_CREATE_TT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ESH_S_MU_ASSIST_CATEGORY_TEXT 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_ESH_S_MU_ASSIST_CATEGORY_TEXT 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_ESH_S_MU_ASSIST_CATEGORY_TEXT INTO WA_ESH_S_MU_ASSIST_CATEGORY_TEXT.


*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_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR, 
TITLE_MAINT TYPE STRING,
TITLE_VH TYPE STRING,
TAB_TITLE TYPE STRING,
EXPLANATION TYPE STRING,
CATEGORY TYPE STRING,
DESCR TYPE STRING,
SYSREL TYPE STRING,
BUTTON_SEL TYPE STRING,
BUTTON_CANCEL TYPE STRING,
BUTTON_REL_CREATE TYPE STRING,
BUTTON_REL_CREATE_TT TYPE STRING,
BUTTON_REL_DELETE TYPE STRING,
BUTTON_REL_DELETE_TT TYPE STRING,
BUTTON_CAT_CREATE TYPE STRING,
BUTTON_CAT_CREATE_TT TYPE STRING,
BUTTON_CAT_DELETE TYPE STRING,
BUTTON_CAT_DELETE_TT TYPE STRING,
BUTTON_SAVE TYPE STRING,
CANCEL_CAT_TITLE TYPE STRING,
CANCEL_CAT_TEXT TYPE STRING,
DEL_CAT_TITLE TYPE STRING,
DEL_CAT_TEXT TYPE STRING,
DEL_REL_TITLE TYPE STRING,
DEL_REL_TEXT TYPE STRING,
MOVE_REL_TITLE TYPE STRING,
MOVE_REL_TEXT TYPE STRING,
BUTTON_MOVE TYPE STRING,
BUTTON_MOVE_TOP TYPE STRING,
BUTTON_MOVE_UP TYPE STRING,
BUTTON_MOVE_DOWN TYPE STRING,
BUTTON_MOVE_END TYPE STRING,
TRANSPORT_POPUP_TITLE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_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_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-TITLE_MAINT sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-TITLE_VH sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-TAB_TITLE sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-EXPLANATION sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-CATEGORY sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-DESCR sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-SYSREL sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-BUTTON_SEL sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-BUTTON_CANCEL sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-BUTTON_REL_CREATE sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-BUTTON_REL_CREATE_TT sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-BUTTON_REL_DELETE sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-BUTTON_REL_DELETE_TT sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-BUTTON_CAT_CREATE sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-BUTTON_CAT_CREATE_TT sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-BUTTON_CAT_DELETE sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-BUTTON_CAT_DELETE_TT sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-BUTTON_SAVE sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-CANCEL_CAT_TITLE sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-CANCEL_CAT_TEXT sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-DEL_CAT_TITLE sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-DEL_CAT_TEXT sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-DEL_REL_TITLE sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-DEL_REL_TEXT sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-MOVE_REL_TITLE sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-MOVE_REL_TEXT sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-BUTTON_MOVE sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-BUTTON_MOVE_TOP sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-BUTTON_MOVE_UP sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-BUTTON_MOVE_DOWN sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-BUTTON_MOVE_END sy-vline 
WA_ESH_S_MU_ASSIST_CATEGORY_TEXT_STR-TRANSPORT_POPUP_TITLE sy-vline      INTO ld_text SEPARATED BY SPACE.

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