ABAP Select data from SAP table SCMI_STAGING into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SCMI_STAGING
*  INTO TABLE @DATA(IT_SCMI_STAGING2).
*--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_SCMI_STAGING INDEX 1 INTO DATA(WA_SCMI_STAGING2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SCMI_STAGING>-CLIENT = 1.
<SCMI_STAGING>-IDENTIFIER = 1.
<SCMI_STAGING>-ACTIVITY_TYPE = 1.
<SCMI_STAGING>-ACTIVITY_ID = 1.
<SCMI_STAGING>-CLASSNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SCMI_STAGING-VIEWCLUSTER, sy-vline,
  WA_SCMI_STAGING-VIEWNAME, sy-vline,
  WA_SCMI_STAGING-TABLENAME, sy-vline,
  WA_SCMI_STAGING-TRKEY, sy-vline,
  WA_SCMI_STAGING-FIELDNAME, sy-vline,
  WA_SCMI_STAGING-FIELDVALUE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SCMI_STAGING 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_SCMI_STAGING 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_SCMI_STAGING INTO WA_SCMI_STAGING.


*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_SCMI_STAGING_STR, 
CLIENT TYPE STRING,
IDENTIFIER TYPE STRING,
ACTIVITY_TYPE TYPE STRING,
ACTIVITY_ID TYPE STRING,
CLASSNAME TYPE STRING,
VIEWCLUSTER TYPE STRING,
VIEWNAME TYPE STRING,
TABLENAME TYPE STRING,
TRKEY TYPE STRING,
FIELDNAME TYPE STRING,
FIELDVALUE TYPE STRING,
STATUS TYPE STRING,
ADDITIONALDTLS TYPE STRING,
IMG_ACTIVITY TYPE STRING,
OBJECT_TYPE TYPE STRING,
LOG_ID TYPE STRING,
ROW_OPERATION TYPE STRING,
PRIM_TRKEY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SCMI_STAGING_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_SCMI_STAGING_STR-CLIENT sy-vline 
WA_SCMI_STAGING_STR-IDENTIFIER sy-vline 
WA_SCMI_STAGING_STR-ACTIVITY_TYPE sy-vline 
WA_SCMI_STAGING_STR-ACTIVITY_ID sy-vline 
WA_SCMI_STAGING_STR-CLASSNAME sy-vline 
WA_SCMI_STAGING_STR-VIEWCLUSTER sy-vline 
WA_SCMI_STAGING_STR-VIEWNAME sy-vline 
WA_SCMI_STAGING_STR-TABLENAME sy-vline 
WA_SCMI_STAGING_STR-TRKEY sy-vline 
WA_SCMI_STAGING_STR-FIELDNAME sy-vline 
WA_SCMI_STAGING_STR-FIELDVALUE sy-vline 
WA_SCMI_STAGING_STR-STATUS sy-vline 
WA_SCMI_STAGING_STR-ADDITIONALDTLS sy-vline 
WA_SCMI_STAGING_STR-IMG_ACTIVITY sy-vline 
WA_SCMI_STAGING_STR-OBJECT_TYPE sy-vline 
WA_SCMI_STAGING_STR-LOG_ID sy-vline 
WA_SCMI_STAGING_STR-ROW_OPERATION sy-vline 
WA_SCMI_STAGING_STR-PRIM_TRKEY sy-vline      INTO ld_text SEPARATED BY SPACE.

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