ABAP Select data from SAP table ESH_S_MU_NODE_ASSO 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_NODE_ASSO 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_NODE_ASSO. 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_NODE_ASSO 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_NODE_ASSO TYPE STANDARD TABLE OF ESH_S_MU_NODE_ASSO,
      WA_ESH_S_MU_NODE_ASSO TYPE ESH_S_MU_NODE_ASSO,
      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_NODE_ASSO> TYPE ESH_S_MU_NODE_ASSO.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESH_S_MU_NODE_ASSO
*  INTO TABLE @DATA(IT_ESH_S_MU_NODE_ASSO2).
*--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_NODE_ASSO INDEX 1 INTO DATA(WA_ESH_S_MU_NODE_ASSO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ESH_S_MU_NODE_ASSO>-SWCV = 1.
<ESH_S_MU_NODE_ASSO>-SYS_GROUP = 1.
<ESH_S_MU_NODE_ASSO>-SOURCE_BO = 1.
<ESH_S_MU_NODE_ASSO>-RELATION_GUID = 1.
<ESH_S_MU_NODE_ASSO>-NODE_GUID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESH_S_MU_NODE_ASSO-ASSO_TYPE, sy-vline,
  WA_ESH_S_MU_NODE_ASSO-ASSO_NAME, sy-vline,
  WA_ESH_S_MU_NODE_ASSO-IS_READONLY_ASSONAME, sy-vline,
  WA_ESH_S_MU_NODE_ASSO-SOURCE_NODE_MUID, sy-vline,
  WA_ESH_S_MU_NODE_ASSO-SOURCE_NODE_MODEL, sy-vline,
  WA_ESH_S_MU_NODE_ASSO-SOURCE_NODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ESH_S_MU_NODE_ASSO 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_NODE_ASSO 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_NODE_ASSO INTO WA_ESH_S_MU_NODE_ASSO.


*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_NODE_ASSO_STR, 
SWCV TYPE STRING,
SYS_GROUP TYPE STRING,
SOURCE_BO TYPE STRING,
RELATION_GUID TYPE STRING,
NODE_GUID TYPE STRING,
ASSO_TYPE TYPE STRING,
ASSO_NAME TYPE STRING,
IS_READONLY_ASSONAME TYPE STRING,
SOURCE_NODE_MUID TYPE STRING,
SOURCE_NODE_MODEL TYPE STRING,
SOURCE_NODE TYPE STRING,
SOURCE_NODE_DESCR TYPE STRING,
PARENT_SOURCE_BO TYPE STRING,
PARENT_SOURCE_NODE TYPE STRING,
PARENT_SOURCE_NODE_MUID TYPE STRING,
PARENT_SOURCE_NODE_MODEL TYPE STRING,
TARGET_BO TYPE STRING,
TARGET_NODE TYPE STRING,
TARGET_NODE_DESCR TYPE STRING,
DATA_PROV TYPE STRING,
DATA_PROV_GUID TYPE STRING,
DATA_PROV_DESCR TYPE STRING,
IS_READONLY_DATA_PROV TYPE STRING,
CARDINALITY TYPE STRING,
CARDINALITY_BACK TYPE STRING,
IS_READONLY_CARDINALITY TYPE STRING,
IS_READONLY_CARD_BACK TYPE STRING,
DETAIL_UI TYPE STRING,
IS_READONLY_DETAILUI TYPE STRING,
TARGET_NAV_ID TYPE STRING,
IS_ROOT TYPE STRING,
IS_ROOT_READONLY TYPE STRING,
HAS_FIELDS TYPE STRING,
HAS_LAYOUT TYPE STRING,
HAS_ODP TYPE STRING,
HAS_ROLES TYPE STRING,
HAS_AUTH TYPE STRING,
HAS_FILTER TYPE STRING,
HAS_REL_BO TYPE STRING,
HAS_ADD_UIFIELD TYPE STRING,
HAS_BACKEND_NAV TYPE STRING,
HAS_REL_ACTION TYPE STRING,
IS_TEXT_NODE TYPE STRING,
IS_EXPANDED TYPE STRING,
IS_LEAF TYPE STRING,
HAS_CHILD_LOADED TYPE STRING,
TEXT_NODE TYPE STRING,
BACKEND_NAME TYPE STRING,
TYPE TYPE STRING,
ORG_SYSREL_GUID TYPE STRING,
ORG_SYSREL_GUID_REL TYPE STRING,
ORG_SYSREL_GUID_SWITCH TYPE STRING,
DELETE_ENABLED TYPE STRING,
REL_DELETE_ENABLED TYPE STRING,
ASSOCIATION_TYPE TYPE STRING,
IS_NODE_SWITCHED TYPE STRING,
IS_REL_SWITCHED TYPE STRING,
SEMANTICS TYPE STRING,
SEMANTICS_READONLY TYPE STRING,
IS_RELATION_LOCKED TYPE STRING,
LINE_IS_SWC TYPE STRING,
CONTEXT TYPE STRING,
MAPPING_ROLE TYPE STRING,
MAPPING_ROLE_READONLY TYPE STRING,
MOD_STATUS_RELATION TYPE STRING,
BUTTON_GOS_ENABLED TYPE STRING,
ASSO_NODE_LINK_ENABLED TYPE STRING,
SOURCE_NODE_READONLY TYPE STRING,
REPLACING_CDS_ENTITY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ESH_S_MU_NODE_ASSO_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_NODE_ASSO_STR-SWCV sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-SYS_GROUP sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-SOURCE_BO sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-RELATION_GUID sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-NODE_GUID sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-ASSO_TYPE sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-ASSO_NAME sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-IS_READONLY_ASSONAME sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-SOURCE_NODE_MUID sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-SOURCE_NODE_MODEL sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-SOURCE_NODE sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-SOURCE_NODE_DESCR sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-PARENT_SOURCE_BO sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-PARENT_SOURCE_NODE sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-PARENT_SOURCE_NODE_MUID sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-PARENT_SOURCE_NODE_MODEL sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-TARGET_BO sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-TARGET_NODE sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-TARGET_NODE_DESCR sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-DATA_PROV sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-DATA_PROV_GUID sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-DATA_PROV_DESCR sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-IS_READONLY_DATA_PROV sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-CARDINALITY sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-CARDINALITY_BACK sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-IS_READONLY_CARDINALITY sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-IS_READONLY_CARD_BACK sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-DETAIL_UI sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-IS_READONLY_DETAILUI sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-TARGET_NAV_ID sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-IS_ROOT sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-IS_ROOT_READONLY sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-HAS_FIELDS sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-HAS_LAYOUT sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-HAS_ODP sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-HAS_ROLES sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-HAS_AUTH sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-HAS_FILTER sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-HAS_REL_BO sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-HAS_ADD_UIFIELD sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-HAS_BACKEND_NAV sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-HAS_REL_ACTION sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-IS_TEXT_NODE sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-IS_EXPANDED sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-IS_LEAF sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-HAS_CHILD_LOADED sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-TEXT_NODE sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-BACKEND_NAME sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-TYPE sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-ORG_SYSREL_GUID sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-ORG_SYSREL_GUID_REL sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-ORG_SYSREL_GUID_SWITCH sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-DELETE_ENABLED sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-REL_DELETE_ENABLED sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-ASSOCIATION_TYPE sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-IS_NODE_SWITCHED sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-IS_REL_SWITCHED sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-SEMANTICS sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-SEMANTICS_READONLY sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-IS_RELATION_LOCKED sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-LINE_IS_SWC sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-CONTEXT sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-MAPPING_ROLE sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-MAPPING_ROLE_READONLY sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-MOD_STATUS_RELATION sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-BUTTON_GOS_ENABLED sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-ASSO_NODE_LINK_ENABLED sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-SOURCE_NODE_READONLY sy-vline 
WA_ESH_S_MU_NODE_ASSO_STR-REPLACING_CDS_ENTITY sy-vline      INTO ld_text SEPARATED BY SPACE.

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