ABAP Select data from SAP table KEDRHELP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KEDRHELP
*  INTO TABLE @DATA(IT_KEDRHELP2).
*--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_KEDRHELP INDEX 1 INTO DATA(WA_KEDRHELP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KEDRHELP>-SOURCE_ID = 1.
<KEDRHELP>-SOURCE_FLD = 1.
<KEDRHELP>-TARGET_ID = 1.
<KEDRHELP>-TARGET_FLD = 1.
<KEDRHELP>-METHOD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KEDRHELP-STEP_TEXT, sy-vline,
  WA_KEDRHELP-STEP_ID, sy-vline,
  WA_KEDRHELP-ISSUE_ERROR, sy-vline,
  WA_KEDRHELP-EXIT_IF_FOUND, sy-vline,
  WA_KEDRHELP-OPERATOR, sy-vline,
  WA_KEDRHELP-TABLENAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KEDRHELP 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_KEDRHELP 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_KEDRHELP INTO WA_KEDRHELP.


*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_KEDRHELP_STR, 
SOURCE_ID TYPE STRING,
SOURCE_FLD TYPE STRING,
TARGET_ID TYPE STRING,
TARGET_FLD TYPE STRING,
METHOD TYPE STRING,
STEP_TEXT TYPE STRING,
STEP_ID TYPE STRING,
ISSUE_ERROR TYPE STRING,
EXIT_IF_FOUND TYPE STRING,
OPERATOR TYPE STRING,
TABLENAME TYPE STRING,
TABLEKEY TYPE STRING,
TABLEFIELD TYPE STRING,
TIME_DEPENDANT TYPE STRING,
NO_RANGES TYPE STRING,
VALID_FROM TYPE STRING,
DEFAULT_DATE TYPE STRING,
DELFLAG TYPE STRING,
BLANKISALLOWED TYPE STRING,
OVERWRITE TYPE STRING,
CONSTANT TYPE STRING,
METHODDRULE TYPE STRING,
METHODTABLE TYPE STRING,
METHODMOVE TYPE STRING,
METHODCLEAR TYPE STRING,
METHODEXIT TYPE STRING,
METHODCHIER TYPE STRING,
CHIERFLAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KEDRHELP_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_KEDRHELP_STR-SOURCE_ID sy-vline 
WA_KEDRHELP_STR-SOURCE_FLD sy-vline 
WA_KEDRHELP_STR-TARGET_ID sy-vline 
WA_KEDRHELP_STR-TARGET_FLD sy-vline 
WA_KEDRHELP_STR-METHOD sy-vline 
WA_KEDRHELP_STR-STEP_TEXT sy-vline 
WA_KEDRHELP_STR-STEP_ID sy-vline 
WA_KEDRHELP_STR-ISSUE_ERROR sy-vline 
WA_KEDRHELP_STR-EXIT_IF_FOUND sy-vline 
WA_KEDRHELP_STR-OPERATOR sy-vline 
WA_KEDRHELP_STR-TABLENAME sy-vline 
WA_KEDRHELP_STR-TABLEKEY sy-vline 
WA_KEDRHELP_STR-TABLEFIELD sy-vline 
WA_KEDRHELP_STR-TIME_DEPENDANT sy-vline 
WA_KEDRHELP_STR-NO_RANGES sy-vline 
WA_KEDRHELP_STR-VALID_FROM sy-vline 
WA_KEDRHELP_STR-DEFAULT_DATE sy-vline 
WA_KEDRHELP_STR-DELFLAG sy-vline 
WA_KEDRHELP_STR-BLANKISALLOWED sy-vline 
WA_KEDRHELP_STR-OVERWRITE sy-vline 
WA_KEDRHELP_STR-CONSTANT sy-vline 
WA_KEDRHELP_STR-METHODDRULE sy-vline 
WA_KEDRHELP_STR-METHODTABLE sy-vline 
WA_KEDRHELP_STR-METHODMOVE sy-vline 
WA_KEDRHELP_STR-METHODCLEAR sy-vline 
WA_KEDRHELP_STR-METHODEXIT sy-vline 
WA_KEDRHELP_STR-METHODCHIER sy-vline 
WA_KEDRHELP_STR-CHIERFLAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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