ABAP Select data from SAP table CMST_PI_CI_HEADER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMST_PI_CI_HEADER
*  INTO TABLE @DATA(IT_CMST_PI_CI_HEADER2).
*--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_CMST_PI_CI_HEADER INDEX 1 INTO DATA(WA_CMST_PI_CI_HEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMST_PI_CI_HEADER>-CLIENT = 1.
<CMST_PI_CI_HEADER>-BUCKET_GUID = 1.
<CMST_PI_CI_HEADER>-BUCKET_ID = 1.
<CMST_PI_CI_HEADER>-PRODUCT_ID = 1.
<CMST_PI_CI_HEADER>-PRODUCT_LOGSYS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMST_PI_CI_HEADER-TKPARTNER_ID, sy-vline,
  WA_CMST_PI_CI_HEADER-TK_LOGSYS, sy-vline,
  WA_CMST_PI_CI_HEADER-SALES_ORG, sy-vline,
  WA_CMST_PI_CI_HEADER-ORG_DIST_CHANNEL, sy-vline,
  WA_CMST_PI_CI_HEADER-ORG_DIVISION, sy-vline,
  WA_CMST_PI_CI_HEADER-COND_RATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMST_PI_CI_HEADER 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_CMST_PI_CI_HEADER 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_CMST_PI_CI_HEADER INTO WA_CMST_PI_CI_HEADER.


*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_CMST_PI_CI_HEADER_STR, 
CLIENT TYPE STRING,
BUCKET_GUID TYPE STRING,
BUCKET_ID TYPE STRING,
PRODUCT_ID TYPE STRING,
PRODUCT_LOGSYS TYPE STRING,
TKPARTNER_ID TYPE STRING,
TK_LOGSYS TYPE STRING,
SALES_ORG TYPE STRING,
ORG_DIST_CHANNEL TYPE STRING,
ORG_DIVISION TYPE STRING,
COND_RATE TYPE STRING,
COND_CURRENCY TYPE STRING,
COND_PRC_UNIT TYPE STRING,
COND_UOM TYPE STRING,
COND_NUMER TYPE STRING,
COND_DENOM TYPE STRING,
AVBL_QTY TYPE STRING,
QTY_UNIT TYPE STRING,
LATEST_SELLINDT TYPE STRING,
LASTHISTORYID TYPE STRING,
PP_STATUS TYPE STRING,
DELETE_FLAG TYPE STRING,
PTYPE_GUID TYPE STRING,
CREATED_AT TYPE STRING,
CREATED_TM TYPE STRING,
CREATED_BY TYPE STRING,
CHANGED_AT TYPE STRING,
CHANGED_TM TYPE STRING,
CHANGED_BY TYPE STRING,
LOGHANDLE TYPE STRING,
ARCHIVE_FLAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMST_PI_CI_HEADER_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_CMST_PI_CI_HEADER_STR-CLIENT sy-vline 
WA_CMST_PI_CI_HEADER_STR-BUCKET_GUID sy-vline 
WA_CMST_PI_CI_HEADER_STR-BUCKET_ID sy-vline 
WA_CMST_PI_CI_HEADER_STR-PRODUCT_ID sy-vline 
WA_CMST_PI_CI_HEADER_STR-PRODUCT_LOGSYS sy-vline 
WA_CMST_PI_CI_HEADER_STR-TKPARTNER_ID sy-vline 
WA_CMST_PI_CI_HEADER_STR-TK_LOGSYS sy-vline 
WA_CMST_PI_CI_HEADER_STR-SALES_ORG sy-vline 
WA_CMST_PI_CI_HEADER_STR-ORG_DIST_CHANNEL sy-vline 
WA_CMST_PI_CI_HEADER_STR-ORG_DIVISION sy-vline 
WA_CMST_PI_CI_HEADER_STR-COND_RATE sy-vline 
WA_CMST_PI_CI_HEADER_STR-COND_CURRENCY sy-vline 
WA_CMST_PI_CI_HEADER_STR-COND_PRC_UNIT sy-vline 
WA_CMST_PI_CI_HEADER_STR-COND_UOM sy-vline 
WA_CMST_PI_CI_HEADER_STR-COND_NUMER sy-vline 
WA_CMST_PI_CI_HEADER_STR-COND_DENOM sy-vline 
WA_CMST_PI_CI_HEADER_STR-AVBL_QTY sy-vline 
WA_CMST_PI_CI_HEADER_STR-QTY_UNIT sy-vline 
WA_CMST_PI_CI_HEADER_STR-LATEST_SELLINDT sy-vline 
WA_CMST_PI_CI_HEADER_STR-LASTHISTORYID sy-vline 
WA_CMST_PI_CI_HEADER_STR-PP_STATUS sy-vline 
WA_CMST_PI_CI_HEADER_STR-DELETE_FLAG sy-vline 
WA_CMST_PI_CI_HEADER_STR-PTYPE_GUID sy-vline 
WA_CMST_PI_CI_HEADER_STR-CREATED_AT sy-vline 
WA_CMST_PI_CI_HEADER_STR-CREATED_TM sy-vline 
WA_CMST_PI_CI_HEADER_STR-CREATED_BY sy-vline 
WA_CMST_PI_CI_HEADER_STR-CHANGED_AT sy-vline 
WA_CMST_PI_CI_HEADER_STR-CHANGED_TM sy-vline 
WA_CMST_PI_CI_HEADER_STR-CHANGED_BY sy-vline 
WA_CMST_PI_CI_HEADER_STR-LOGHANDLE sy-vline 
WA_CMST_PI_CI_HEADER_STR-ARCHIVE_FLAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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