ABAP Select data from SAP table UC0_S_CUST00 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP UC0_S_CUST00 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 UC0_S_CUST00. 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 UC0_S_CUST00 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_UC0_S_CUST00 TYPE STANDARD TABLE OF UC0_S_CUST00,
      WA_UC0_S_CUST00 TYPE UC0_S_CUST00,
      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: <UC0_S_CUST00> TYPE UC0_S_CUST00.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_UC0_S_CUST00.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM UC0_S_CUST00
  INTO TABLE IT_UC0_S_CUST00.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM UC0_S_CUST00
*  INTO TABLE @DATA(IT_UC0_S_CUST002).
*--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_UC0_S_CUST00 INDEX 1 INTO DATA(WA_UC0_S_CUST002).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_UC0_S_CUST00 ASSIGNING <UC0_S_CUST00>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<UC0_S_CUST00>-VALUE = 1.
<UC0_S_CUST00>-VALUE2 = 1.
<UC0_S_CUST00>-DEFLT = 1.
<UC0_S_CUST00>-DESCRIP = 1.
<UC0_S_CUST00>-METHID = 1.

ENDLOOP.

LOOP AT IT_UC0_S_CUST00 INTO WA_UC0_S_CUST00.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_UC0_S_CUST00-APPL, sy-vline,
  WA_UC0_S_CUST00-METHTYPE, sy-vline,
  WA_UC0_S_CUST00-KEY01, sy-vline,
  WA_UC0_S_CUST00-KEY02, sy-vline,
  WA_UC0_S_CUST00-KEY03, sy-vline,
  WA_UC0_S_CUST00-KEY04, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_UC0_S_CUST00 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_UC0_S_CUST00 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_UC0_S_CUST00 INTO WA_UC0_S_CUST00.


*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_UC0_S_CUST00_STR, 
VALUE TYPE STRING,
VALUE2 TYPE STRING,
DEFLT TYPE STRING,
DESCRIP TYPE STRING,
METHID TYPE STRING,
APPL TYPE STRING,
METHTYPE TYPE STRING,
KEY01 TYPE STRING,
KEY02 TYPE STRING,
KEY03 TYPE STRING,
KEY04 TYPE STRING,
FILTER TYPE STRING,
TYP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_UC0_S_CUST00_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_UC0_S_CUST00_STR-VALUE sy-vline 
WA_UC0_S_CUST00_STR-VALUE2 sy-vline 
WA_UC0_S_CUST00_STR-DEFLT sy-vline 
WA_UC0_S_CUST00_STR-DESCRIP sy-vline 
WA_UC0_S_CUST00_STR-METHID sy-vline 
WA_UC0_S_CUST00_STR-APPL sy-vline 
WA_UC0_S_CUST00_STR-METHTYPE sy-vline 
WA_UC0_S_CUST00_STR-KEY01 sy-vline 
WA_UC0_S_CUST00_STR-KEY02 sy-vline 
WA_UC0_S_CUST00_STR-KEY03 sy-vline 
WA_UC0_S_CUST00_STR-KEY04 sy-vline 
WA_UC0_S_CUST00_STR-FILTER sy-vline 
WA_UC0_S_CUST00_STR-TYP sy-vline      INTO ld_text SEPARATED BY SPACE.

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