ABAP Select data from SAP table ESH_L_CUSTOMERST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ESH_L_CUSTOMERST 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_L_CUSTOMERST. 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_L_CUSTOMERST 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_L_CUSTOMERST TYPE STANDARD TABLE OF ESH_L_CUSTOMERST,
      WA_ESH_L_CUSTOMERST TYPE ESH_L_CUSTOMERST,
      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_L_CUSTOMERST> TYPE ESH_L_CUSTOMERST.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESH_L_CUSTOMERST
*  INTO TABLE @DATA(IT_ESH_L_CUSTOMERST2).
*--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_L_CUSTOMERST INDEX 1 INTO DATA(WA_ESH_L_CUSTOMERST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ESH_L_CUSTOMERST>-MANDT = 1.
<ESH_L_CUSTOMERST>-CUSTOMER = 1.
<ESH_L_CUSTOMERST>-ADDRESSID = 1.
<ESH_L_CUSTOMERST>-AUTHORIZATIONGROUP = 1.
<ESH_L_CUSTOMERST>-BILLINGISBLOCKEDFORCUSTOMER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESH_L_CUSTOMERST-BUSINESSPARTNER, sy-vline,
  WA_ESH_L_CUSTOMERST-CITYNAME, sy-vline,
  WA_ESH_L_CUSTOMERST-COMPANYCODE, sy-vline,
  WA_ESH_L_CUSTOMERST-CONTACTPERSONDEPARTMENT, sy-vline,
  WA_ESH_L_CUSTOMERST-CONTACTPERSONFUNCTION, sy-vline,
  WA_ESH_L_CUSTOMERST-COUNTRY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ESH_L_CUSTOMERST 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_L_CUSTOMERST 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_L_CUSTOMERST INTO WA_ESH_L_CUSTOMERST.


*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.

*Conversion exit ALPHA, internal->external for field CUSTOMER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ESH_L_CUSTOMERST-CUSTOMER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESH_L_CUSTOMERST-CUSTOMER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ADDRESSID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ESH_L_CUSTOMERST-ADDRESSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESH_L_CUSTOMERST-ADDRESSID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BUSINESSPARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ESH_L_CUSTOMERST-BUSINESSPARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESH_L_CUSTOMERST-BUSINESSPARTNER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SXIDN, internal->external for field EMAILADDRESS
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_ESH_L_CUSTOMERST-EMAILADDRESS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESH_L_CUSTOMERST-EMAILADDRESS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_ESH_L_CUSTOMERST-LANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESH_L_CUSTOMERST-LANGUAGE.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_ESH_L_CUSTOMERST_STR, 
MANDT TYPE STRING,
CUSTOMER TYPE STRING,
ADDRESSID TYPE STRING,
AUTHORIZATIONGROUP TYPE STRING,
BILLINGISBLOCKEDFORCUSTOMER TYPE STRING,
BUSINESSPARTNER TYPE STRING,
CITYNAME TYPE STRING,
COMPANYCODE TYPE STRING,
CONTACTPERSONDEPARTMENT TYPE STRING,
CONTACTPERSONFUNCTION TYPE STRING,
COUNTRY TYPE STRING,
COUNTRYNAME TYPE STRING,
CREATEDBYUSER TYPE STRING,
CUSTOMERACCOUNTGROUP TYPE STRING,
DELETIONINDICATOR TYPE STRING,
DELIVERYISBLOCKED TYPE STRING,
DISTRIBUTIONCHANNEL TYPE STRING,
DISTRIBUTIONCHANNELNAME TYPE STRING,
DIVISION TYPE STRING,
DIVISIONNAME TYPE STRING,
EMAILADDRESS TYPE STRING,
FAXNUMBER TYPE STRING,
CONTACTPERSONFIRSTNAME TYPE STRING,
FIRSTNAME TYPE STRING,
HOUSENUMBER TYPE STRING,
INDUSTRY TYPE STRING,
INTERNATIONALLOCATIONNUMBER1 TYPE STRING,
LANGUAGE TYPE STRING,
LASTNAME TYPE STRING,
ORGANIZATIONBPNAME1 TYPE STRING,
ORGANIZATIONBPNAME2 TYPE STRING,
POSTALCODE TYPE STRING,
POSTINGISBLOCKED TYPE STRING,
REGION TYPE STRING,
REGIONNAME TYPE STRING,
SALESORGANIZATION TYPE STRING,
SALESORGANIZATIONNAME TYPE STRING,
SEARCHTERM1 TYPE STRING,
STREETNAME TYPE STRING,
TAXNUMBER1 TYPE STRING,
VATREGISTRATION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ESH_L_CUSTOMERST_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_L_CUSTOMERST_STR-MANDT sy-vline 
WA_ESH_L_CUSTOMERST_STR-CUSTOMER sy-vline 
WA_ESH_L_CUSTOMERST_STR-ADDRESSID sy-vline 
WA_ESH_L_CUSTOMERST_STR-AUTHORIZATIONGROUP sy-vline 
WA_ESH_L_CUSTOMERST_STR-BILLINGISBLOCKEDFORCUSTOMER sy-vline 
WA_ESH_L_CUSTOMERST_STR-BUSINESSPARTNER sy-vline 
WA_ESH_L_CUSTOMERST_STR-CITYNAME sy-vline 
WA_ESH_L_CUSTOMERST_STR-COMPANYCODE sy-vline 
WA_ESH_L_CUSTOMERST_STR-CONTACTPERSONDEPARTMENT sy-vline 
WA_ESH_L_CUSTOMERST_STR-CONTACTPERSONFUNCTION sy-vline 
WA_ESH_L_CUSTOMERST_STR-COUNTRY sy-vline 
WA_ESH_L_CUSTOMERST_STR-COUNTRYNAME sy-vline 
WA_ESH_L_CUSTOMERST_STR-CREATEDBYUSER sy-vline 
WA_ESH_L_CUSTOMERST_STR-CUSTOMERACCOUNTGROUP sy-vline 
WA_ESH_L_CUSTOMERST_STR-DELETIONINDICATOR sy-vline 
WA_ESH_L_CUSTOMERST_STR-DELIVERYISBLOCKED sy-vline 
WA_ESH_L_CUSTOMERST_STR-DISTRIBUTIONCHANNEL sy-vline 
WA_ESH_L_CUSTOMERST_STR-DISTRIBUTIONCHANNELNAME sy-vline 
WA_ESH_L_CUSTOMERST_STR-DIVISION sy-vline 
WA_ESH_L_CUSTOMERST_STR-DIVISIONNAME sy-vline 
WA_ESH_L_CUSTOMERST_STR-EMAILADDRESS sy-vline 
WA_ESH_L_CUSTOMERST_STR-FAXNUMBER sy-vline 
WA_ESH_L_CUSTOMERST_STR-CONTACTPERSONFIRSTNAME sy-vline 
WA_ESH_L_CUSTOMERST_STR-FIRSTNAME sy-vline 
WA_ESH_L_CUSTOMERST_STR-HOUSENUMBER sy-vline 
WA_ESH_L_CUSTOMERST_STR-INDUSTRY sy-vline 
WA_ESH_L_CUSTOMERST_STR-INTERNATIONALLOCATIONNUMBER1 sy-vline 
WA_ESH_L_CUSTOMERST_STR-LANGUAGE sy-vline 
WA_ESH_L_CUSTOMERST_STR-LASTNAME sy-vline 
WA_ESH_L_CUSTOMERST_STR-ORGANIZATIONBPNAME1 sy-vline 
WA_ESH_L_CUSTOMERST_STR-ORGANIZATIONBPNAME2 sy-vline 
WA_ESH_L_CUSTOMERST_STR-POSTALCODE sy-vline 
WA_ESH_L_CUSTOMERST_STR-POSTINGISBLOCKED sy-vline 
WA_ESH_L_CUSTOMERST_STR-REGION sy-vline 
WA_ESH_L_CUSTOMERST_STR-REGIONNAME sy-vline 
WA_ESH_L_CUSTOMERST_STR-SALESORGANIZATION sy-vline 
WA_ESH_L_CUSTOMERST_STR-SALESORGANIZATIONNAME sy-vline 
WA_ESH_L_CUSTOMERST_STR-SEARCHTERM1 sy-vline 
WA_ESH_L_CUSTOMERST_STR-STREETNAME sy-vline 
WA_ESH_L_CUSTOMERST_STR-TAXNUMBER1 sy-vline 
WA_ESH_L_CUSTOMERST_STR-VATREGISTRATION sy-vline      INTO ld_text SEPARATED BY SPACE.

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