ABAP Select data from SAP table /TDAG/RCSS_UEC_SEL_SUPPLIER into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /TDAG/RCSS_UEC_SEL_SUPPLIER 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 /TDAG/RCSS_UEC_SEL_SUPPLIER. 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 /TDAG/RCSS_UEC_SEL_SUPPLIER 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_/TDAG/RCSS_UEC_SEL_SUPPLIER TYPE STANDARD TABLE OF /TDAG/RCSS_UEC_SEL_SUPPLIER,
      WA_/TDAG/RCSS_UEC_SEL_SUPPLIER TYPE /TDAG/RCSS_UEC_SEL_SUPPLIER,
      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: </TDAG/RCSS_UEC_SEL_SUPPLIER> TYPE /TDAG/RCSS_UEC_SEL_SUPPLIER.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /TDAG/RCSS_UEC_SEL_SUPPLIER
  INTO TABLE IT_/TDAG/RCSS_UEC_SEL_SUPPLIER.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /TDAG/RCSS_UEC_SEL_SUPPLIER
*  INTO TABLE @DATA(IT_/TDAG/RCSS_UEC_SEL_SUPPLIER2).
*--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_/TDAG/RCSS_UEC_SEL_SUPPLIER INDEX 1 INTO DATA(WA_/TDAG/RCSS_UEC_SEL_SUPPLIER2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/TDAG/RCSS_UEC_SEL_SUPPLIER ASSIGNING </TDAG/RCSS_UEC_SEL_SUPPLIER>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</TDAG/RCSS_UEC_SEL_SUPPLIER>-SUPPLIER = 1.
</TDAG/RCSS_UEC_SEL_SUPPLIER>-SUPPLIER_NAME = 1.
</TDAG/RCSS_UEC_SEL_SUPPLIER>-EKORG = 1.
</TDAG/RCSS_UEC_SEL_SUPPLIER>-WERKS = 1.
</TDAG/RCSS_UEC_SEL_SUPPLIER>-ONLY_REPRESENTATIVE = 1.

ENDLOOP.

LOOP AT IT_/TDAG/RCSS_UEC_SEL_SUPPLIER INTO WA_/TDAG/RCSS_UEC_SEL_SUPPLIER.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/TDAG/RCSS_UEC_SEL_SUPPLIER-ONLY_REPRESENTATIVE_NAME, sy-vline,
  WA_/TDAG/RCSS_UEC_SEL_SUPPLIER-PERSNUMBER, sy-vline,
  WA_/TDAG/RCSS_UEC_SEL_SUPPLIER-EXTPROCESSOR, sy-vline,
  WA_/TDAG/RCSS_UEC_SEL_SUPPLIER-MATERIAL, sy-vline,
  WA_/TDAG/RCSS_UEC_SEL_SUPPLIER-MATERIAL_DESC, sy-vline,
  WA_/TDAG/RCSS_UEC_SEL_SUPPLIER-SPEC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/TDAG/RCSS_UEC_SEL_SUPPLIER 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_/TDAG/RCSS_UEC_SEL_SUPPLIER 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_/TDAG/RCSS_UEC_SEL_SUPPLIER INTO WA_/TDAG/RCSS_UEC_SEL_SUPPLIER.


*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 SUPPLIER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/RCSS_UEC_SEL_SUPPLIER-SUPPLIER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/RCSS_UEC_SEL_SUPPLIER-SUPPLIER.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/RCSS_UEC_SEL_SUPPLIER-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/RCSS_UEC_SEL_SUPPLIER-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SPEC1, internal->external for field SPEC
CALL FUNCTION 'CONVERSION_EXIT_SPEC1_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/RCSS_UEC_SEL_SUPPLIER-SPEC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/RCSS_UEC_SEL_SUPPLIER-SPEC.
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_/TDAG/RCSS_UEC_SEL_SUPPLIER_STR, 
SUPPLIER TYPE STRING,
SUPPLIER_NAME TYPE STRING,
EKORG TYPE STRING,
WERKS TYPE STRING,
ONLY_REPRESENTATIVE TYPE STRING,
ONLY_REPRESENTATIVE_NAME TYPE STRING,
PERSNUMBER TYPE STRING,
EXTPROCESSOR TYPE STRING,
MATERIAL TYPE STRING,
MATERIAL_DESC TYPE STRING,
SPEC TYPE STRING,
SUBCAT TYPE STRING,
SPEC_IDENT1 TYPE STRING,
SPEC_IDENT2 TYPE STRING,
SPEC_IS_HAZARDOUS TYPE STRING,
REACH_AREA TYPE STRING,
USES_MAINTAINED TYPE STRING,
STATUS_DETERMINED TYPE STRING,
STATUS_NEWEST_TASK TYPE STRING,
COMMUNICATION TYPE STRING,
SEND_TO_EXTERNAL_IMMEDIATELY TYPE STRING,
ALV_CELL_STYLE_TAB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/TDAG/RCSS_UEC_SEL_SUPPLIER_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_/TDAG/RCSS_UEC_SEL_SUPPLIER_STR-SUPPLIER sy-vline 
WA_/TDAG/RCSS_UEC_SEL_SUPPLIER_STR-SUPPLIER_NAME sy-vline 
WA_/TDAG/RCSS_UEC_SEL_SUPPLIER_STR-EKORG sy-vline 
WA_/TDAG/RCSS_UEC_SEL_SUPPLIER_STR-WERKS sy-vline 
WA_/TDAG/RCSS_UEC_SEL_SUPPLIER_STR-ONLY_REPRESENTATIVE sy-vline 
WA_/TDAG/RCSS_UEC_SEL_SUPPLIER_STR-ONLY_REPRESENTATIVE_NAME sy-vline 
WA_/TDAG/RCSS_UEC_SEL_SUPPLIER_STR-PERSNUMBER sy-vline 
WA_/TDAG/RCSS_UEC_SEL_SUPPLIER_STR-EXTPROCESSOR sy-vline 
WA_/TDAG/RCSS_UEC_SEL_SUPPLIER_STR-MATERIAL sy-vline 
WA_/TDAG/RCSS_UEC_SEL_SUPPLIER_STR-MATERIAL_DESC sy-vline 
WA_/TDAG/RCSS_UEC_SEL_SUPPLIER_STR-SPEC sy-vline 
WA_/TDAG/RCSS_UEC_SEL_SUPPLIER_STR-SUBCAT sy-vline 
WA_/TDAG/RCSS_UEC_SEL_SUPPLIER_STR-SPEC_IDENT1 sy-vline 
WA_/TDAG/RCSS_UEC_SEL_SUPPLIER_STR-SPEC_IDENT2 sy-vline 
WA_/TDAG/RCSS_UEC_SEL_SUPPLIER_STR-SPEC_IS_HAZARDOUS sy-vline 
WA_/TDAG/RCSS_UEC_SEL_SUPPLIER_STR-REACH_AREA sy-vline 
WA_/TDAG/RCSS_UEC_SEL_SUPPLIER_STR-USES_MAINTAINED sy-vline 
WA_/TDAG/RCSS_UEC_SEL_SUPPLIER_STR-STATUS_DETERMINED sy-vline 
WA_/TDAG/RCSS_UEC_SEL_SUPPLIER_STR-STATUS_NEWEST_TASK sy-vline 
WA_/TDAG/RCSS_UEC_SEL_SUPPLIER_STR-COMMUNICATION sy-vline 
WA_/TDAG/RCSS_UEC_SEL_SUPPLIER_STR-SEND_TO_EXTERNAL_IMMEDIATELY sy-vline 
WA_/TDAG/RCSS_UEC_SEL_SUPPLIER_STR-ALV_CELL_STYLE_TAB sy-vline      INTO ld_text SEPARATED BY SPACE.

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