ABAP Select data from SAP table SMEC_ITEM into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SMEC_ITEM
*  INTO TABLE @DATA(IT_SMEC_ITEM2).
*--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_SMEC_ITEM INDEX 1 INTO DATA(WA_SMEC_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SMEC_ITEM>-SYSID = 1.
<SMEC_ITEM>-SYSERVER = 1.
<SMEC_ITEM>-SYINSTANCE = 1.
<SMEC_ITEM>-SYNAME = 1.
<SMEC_ITEM>-SNAPDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SMEC_ITEM-SNAPTIME, sy-vline,
  WA_SMEC_ITEM-ID, sy-vline,
  WA_SMEC_ITEM-CAT, sy-vline,
  WA_SMEC_ITEM-TITLE, sy-vline,
  WA_SMEC_ITEM-GRP, sy-vline,
  WA_SMEC_ITEM-PROF_PARAM_NAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SMEC_ITEM 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_SMEC_ITEM 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_SMEC_ITEM INTO WA_SMEC_ITEM.


*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_SMEC_ITEM_STR, 
SYSID TYPE STRING,
SYSERVER TYPE STRING,
SYINSTANCE TYPE STRING,
SYNAME TYPE STRING,
SNAPDATE TYPE STRING,
SNAPTIME TYPE STRING,
ID TYPE STRING,
CAT TYPE STRING,
TITLE TYPE STRING,
GRP TYPE STRING,
PROF_PARAM_NAME TYPE STRING,
AUTH TYPE STRING,
CHECKED TYPE STRING,
KIND TYPE STRING,
ACT TYPE STRING,
NUM TYPE STRING,
CHA TYPE STRING,
STATUS TYPE STRING,
STATUS_TEXT TYPE STRING,
FILTER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SMEC_ITEM_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_SMEC_ITEM_STR-SYSID sy-vline 
WA_SMEC_ITEM_STR-SYSERVER sy-vline 
WA_SMEC_ITEM_STR-SYINSTANCE sy-vline 
WA_SMEC_ITEM_STR-SYNAME sy-vline 
WA_SMEC_ITEM_STR-SNAPDATE sy-vline 
WA_SMEC_ITEM_STR-SNAPTIME sy-vline 
WA_SMEC_ITEM_STR-ID sy-vline 
WA_SMEC_ITEM_STR-CAT sy-vline 
WA_SMEC_ITEM_STR-TITLE sy-vline 
WA_SMEC_ITEM_STR-GRP sy-vline 
WA_SMEC_ITEM_STR-PROF_PARAM_NAME sy-vline 
WA_SMEC_ITEM_STR-AUTH sy-vline 
WA_SMEC_ITEM_STR-CHECKED sy-vline 
WA_SMEC_ITEM_STR-KIND sy-vline 
WA_SMEC_ITEM_STR-ACT sy-vline 
WA_SMEC_ITEM_STR-NUM sy-vline 
WA_SMEC_ITEM_STR-CHA sy-vline 
WA_SMEC_ITEM_STR-STATUS sy-vline 
WA_SMEC_ITEM_STR-STATUS_TEXT sy-vline 
WA_SMEC_ITEM_STR-FILTER sy-vline      INTO ld_text SEPARATED BY SPACE.

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