ABAP Select data from SAP table ROIUCM_MAINTAIN_CM_SN_NR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIUCM_MAINTAIN_CM_SN_NR
*  INTO TABLE @DATA(IT_ROIUCM_MAINTAIN_CM_SN_NR2).
*--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_ROIUCM_MAINTAIN_CM_SN_NR INDEX 1 INTO DATA(WA_ROIUCM_MAINTAIN_CM_SN_NR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIUCM_MAINTAIN_CM_SN_NR>-CLIENT = 1.
<ROIUCM_MAINTAIN_CM_SN_NR>-OBJECT = 1.
<ROIUCM_MAINTAIN_CM_SN_NR>-SUBOBJECT = 1.
<ROIUCM_MAINTAIN_CM_SN_NR>-NRRANGENR = 1.
<ROIUCM_MAINTAIN_CM_SN_NR>-TOYEAR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIUCM_MAINTAIN_CM_SN_NR-FROMNUMBER, sy-vline,
  WA_ROIUCM_MAINTAIN_CM_SN_NR-TONUMBER, sy-vline,
  WA_ROIUCM_MAINTAIN_CM_SN_NR-NRLEVEL, sy-vline,
  WA_ROIUCM_MAINTAIN_CM_SN_NR-EXTERNIND, sy-vline,
  WA_ROIUCM_MAINTAIN_CM_SN_NR-TABNAME, sy-vline,
  WA_ROIUCM_MAINTAIN_CM_SN_NR-DESCRIPTION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIUCM_MAINTAIN_CM_SN_NR 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_ROIUCM_MAINTAIN_CM_SN_NR 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_ROIUCM_MAINTAIN_CM_SN_NR INTO WA_ROIUCM_MAINTAIN_CM_SN_NR.


*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 GJAHR, internal->external for field TOYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ROIUCM_MAINTAIN_CM_SN_NR-TOYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIUCM_MAINTAIN_CM_SN_NR-TOYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_ROIUCM_MAINTAIN_CM_SN_NR-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIUCM_MAINTAIN_CM_SN_NR-DATATYPE.
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_ROIUCM_MAINTAIN_CM_SN_NR_STR, 
CLIENT TYPE STRING,
OBJECT TYPE STRING,
SUBOBJECT TYPE STRING,
NRRANGENR TYPE STRING,
TOYEAR TYPE STRING,
FROMNUMBER TYPE STRING,
TONUMBER TYPE STRING,
NRLEVEL TYPE STRING,
EXTERNIND TYPE STRING,
TABNAME TYPE STRING,
DESCRIPTION TYPE STRING,
ICON_STATUS TYPE STRING,
ICON_SNUM TYPE STRING,
ICON_CONFIG TYPE STRING,
ICON_TRANSPORT TYPE STRING,
DATATYPE TYPE STRING,
OUTPUTLEN TYPE STRING,
SYSTEM_NRIV TYPE STRING,
SUGGESTED_FROM TYPE STRING,
SUGGESTED_TO TYPE STRING,
CONDITIONAL TYPE STRING,
COND_PROGRAM TYPE STRING,
COND_FORM TYPE STRING,
IMG_SUBOBJECT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIUCM_MAINTAIN_CM_SN_NR_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_ROIUCM_MAINTAIN_CM_SN_NR_STR-CLIENT sy-vline 
WA_ROIUCM_MAINTAIN_CM_SN_NR_STR-OBJECT sy-vline 
WA_ROIUCM_MAINTAIN_CM_SN_NR_STR-SUBOBJECT sy-vline 
WA_ROIUCM_MAINTAIN_CM_SN_NR_STR-NRRANGENR sy-vline 
WA_ROIUCM_MAINTAIN_CM_SN_NR_STR-TOYEAR sy-vline 
WA_ROIUCM_MAINTAIN_CM_SN_NR_STR-FROMNUMBER sy-vline 
WA_ROIUCM_MAINTAIN_CM_SN_NR_STR-TONUMBER sy-vline 
WA_ROIUCM_MAINTAIN_CM_SN_NR_STR-NRLEVEL sy-vline 
WA_ROIUCM_MAINTAIN_CM_SN_NR_STR-EXTERNIND sy-vline 
WA_ROIUCM_MAINTAIN_CM_SN_NR_STR-TABNAME sy-vline 
WA_ROIUCM_MAINTAIN_CM_SN_NR_STR-DESCRIPTION sy-vline 
WA_ROIUCM_MAINTAIN_CM_SN_NR_STR-ICON_STATUS sy-vline 
WA_ROIUCM_MAINTAIN_CM_SN_NR_STR-ICON_SNUM sy-vline 
WA_ROIUCM_MAINTAIN_CM_SN_NR_STR-ICON_CONFIG sy-vline 
WA_ROIUCM_MAINTAIN_CM_SN_NR_STR-ICON_TRANSPORT sy-vline 
WA_ROIUCM_MAINTAIN_CM_SN_NR_STR-DATATYPE sy-vline 
WA_ROIUCM_MAINTAIN_CM_SN_NR_STR-OUTPUTLEN sy-vline 
WA_ROIUCM_MAINTAIN_CM_SN_NR_STR-SYSTEM_NRIV sy-vline 
WA_ROIUCM_MAINTAIN_CM_SN_NR_STR-SUGGESTED_FROM sy-vline 
WA_ROIUCM_MAINTAIN_CM_SN_NR_STR-SUGGESTED_TO sy-vline 
WA_ROIUCM_MAINTAIN_CM_SN_NR_STR-CONDITIONAL sy-vline 
WA_ROIUCM_MAINTAIN_CM_SN_NR_STR-COND_PROGRAM sy-vline 
WA_ROIUCM_MAINTAIN_CM_SN_NR_STR-COND_FORM sy-vline 
WA_ROIUCM_MAINTAIN_CM_SN_NR_STR-IMG_SUBOBJECT sy-vline      INTO ld_text SEPARATED BY SPACE.

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