ABAP Select data from SAP table EHFNDS_MWB_MAP_MAPPING_EXT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EHFNDS_MWB_MAP_MAPPING_EXT
*  INTO TABLE @DATA(IT_EHFNDS_MWB_MAP_MAPPING_EXT2).
*--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_EHFNDS_MWB_MAP_MAPPING_EXT INDEX 1 INTO DATA(WA_EHFNDS_MWB_MAP_MAPPING_EXT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EHFNDS_MWB_MAP_MAPPING_EXT>-KEY = 1.
<EHFNDS_MWB_MAP_MAPPING_EXT>-PARENT_KEY = 1.
<EHFNDS_MWB_MAP_MAPPING_EXT>-ROOT_KEY = 1.
<EHFNDS_MWB_MAP_MAPPING_EXT>-BO_NAME = 1.
<EHFNDS_MWB_MAP_MAPPING_EXT>-BO_NODE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EHFNDS_MWB_MAP_MAPPING_EXT-BO_NODE_PATH, sy-vline,
  WA_EHFNDS_MWB_MAP_MAPPING_EXT-BO_DATATYPE, sy-vline,
  WA_EHFNDS_MWB_MAP_MAPPING_EXT-FCTX_PATH, sy-vline,
  WA_EHFNDS_MWB_MAP_MAPPING_EXT-FCTX_NODE, sy-vline,
  WA_EHFNDS_MWB_MAP_MAPPING_EXT-FCTX_DATATYPE, sy-vline,
  WA_EHFNDS_MWB_MAP_MAPPING_EXT-FCTX_TYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EHFNDS_MWB_MAP_MAPPING_EXT 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_EHFNDS_MWB_MAP_MAPPING_EXT 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_EHFNDS_MWB_MAP_MAPPING_EXT INTO WA_EHFNDS_MWB_MAP_MAPPING_EXT.


*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_EHFNDS_MWB_MAP_MAPPING_EXT_STR, 
KEY TYPE STRING,
PARENT_KEY TYPE STRING,
ROOT_KEY TYPE STRING,
BO_NAME TYPE STRING,
BO_NODE TYPE STRING,
BO_NODE_PATH TYPE STRING,
BO_DATATYPE TYPE STRING,
FCTX_PATH TYPE STRING,
FCTX_NODE TYPE STRING,
FCTX_DATATYPE TYPE STRING,
FCTX_TYPE TYPE STRING,
BO_ASSOC_PATH TYPE STRING,
FCTX_VARNAME TYPE STRING,
FCTX_COMPONENTS TYPE STRING,
BO_VARNAME TYPE STRING,
BO_PATH_TABLE TYPE STRING,
BO_PATH_TABLE_REV TYPE STRING,
COUNT TYPE STRING,
CURRENT_DEPTH TYPE STRING,
PARENT_FCTX_NODES TYPE STRING,
FCTX_PARENT_COMPONENT TYPE STRING,
FCTX_PARENT_COMP_DTYPE TYPE STRING,
FCTX_PARENT_COMP_VARNAME TYPE STRING,
PARENT_FCTX_NODES_REV TYPE STRING,
FCTX_NODE_USED_AS_PARENT TYPE STRING,
FCTX_PARENT_NODE TYPE STRING,
PATH TYPE STRING,
DATA_TYPE TYPE STRING,
VARNAME TYPE STRING,
DATA_TYPE_IF_TABLE TYPE STRING,
DATA_TYPE_IF_TAB_VARNAM TYPE STRING,
DATA_KIND TYPE STRING,
IS_FIRST_INSTANCE TYPE STRING,
IS_USED_IN_FURTHER_MAPPINGS TYPE STRING,
NODE_USED_AS_PARENT_COUNT TYPE STRING,
PATH_PARENT TYPE STRING,
VARNAME_PARENT TYPE STRING,
DATA_TYPE_PARENT TYPE STRING,
DATA_KIND_PARENT TYPE STRING,
COMPONENT_IN_PARENT_STRUCT TYPE STRING,
DATA_TYPE_IF_TABLE_PARENT TYPE STRING,
DATA_TYPE_IF_TAB_VARNAM_PARENT TYPE STRING,
PARENT_IS_FIRST_INSTANCE TYPE STRING,
PAR_NODE_USED_AS_PARENT_COUNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EHFNDS_MWB_MAP_MAPPING_EXT_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_EHFNDS_MWB_MAP_MAPPING_EXT_STR-KEY sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-PARENT_KEY sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-ROOT_KEY sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-BO_NAME sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-BO_NODE sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-BO_NODE_PATH sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-BO_DATATYPE sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-FCTX_PATH sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-FCTX_NODE sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-FCTX_DATATYPE sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-FCTX_TYPE sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-BO_ASSOC_PATH sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-FCTX_VARNAME sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-FCTX_COMPONENTS sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-BO_VARNAME sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-BO_PATH_TABLE sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-BO_PATH_TABLE_REV sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-COUNT sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-CURRENT_DEPTH sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-PARENT_FCTX_NODES sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-FCTX_PARENT_COMPONENT sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-FCTX_PARENT_COMP_DTYPE sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-FCTX_PARENT_COMP_VARNAME sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-PARENT_FCTX_NODES_REV sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-FCTX_NODE_USED_AS_PARENT sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-FCTX_PARENT_NODE sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-PATH sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-DATA_TYPE sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-VARNAME sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-DATA_TYPE_IF_TABLE sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-DATA_TYPE_IF_TAB_VARNAM sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-DATA_KIND sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-IS_FIRST_INSTANCE sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-IS_USED_IN_FURTHER_MAPPINGS sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-NODE_USED_AS_PARENT_COUNT sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-PATH_PARENT sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-VARNAME_PARENT sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-DATA_TYPE_PARENT sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-DATA_KIND_PARENT sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-COMPONENT_IN_PARENT_STRUCT sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-DATA_TYPE_IF_TABLE_PARENT sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-DATA_TYPE_IF_TAB_VARNAM_PARENT sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-PARENT_IS_FIRST_INSTANCE sy-vline 
WA_EHFNDS_MWB_MAP_MAPPING_EXT_STR-PAR_NODE_USED_AS_PARENT_COUNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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