ABAP Select data from SAP table TRSS_POSITION_LOCK_POSITION into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TRSS_POSITION_LOCK_POSITION
*  INTO TABLE @DATA(IT_TRSS_POSITION_LOCK_POSITION2).
*--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_TRSS_POSITION_LOCK_POSITION INDEX 1 INTO DATA(WA_TRSS_POSITION_LOCK_POSITION2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TRSS_POSITION_LOCK_POSITION>-COMPANY_CODE = 1.
<TRSS_POSITION_LOCK_POSITION>-SECURITY_ACCOUNT = 1.
<TRSS_POSITION_LOCK_POSITION>-SECURITY_ID = 1.
<TRSS_POSITION_LOCK_POSITION>-UNITS = 1.
<TRSS_POSITION_LOCK_POSITION>-NOMINAL_CURR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TRSS_POSITION_LOCK_POSITION-NOMINAL_AMT, sy-vline,
  WA_TRSS_POSITION_LOCK_POSITION-NOMINAL_ORG_AMT, sy-vline,
  WA_TRSS_POSITION_LOCK_POSITION-GUARD_DATE, sy-vline,
  WA_TRSS_POSITION_LOCK_POSITION-GUARD_DATE_TO, sy-vline,
  WA_TRSS_POSITION_LOCK_POSITION-SORT_DATE, sy-vline,
  WA_TRSS_POSITION_LOCK_POSITION-LOCK_FLAG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TRSS_POSITION_LOCK_POSITION 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_TRSS_POSITION_LOCK_POSITION 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_TRSS_POSITION_LOCK_POSITION INTO WA_TRSS_POSITION_LOCK_POSITION.


*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 SECURITY_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TRSS_POSITION_LOCK_POSITION-SECURITY_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TRSS_POSITION_LOCK_POSITION-SECURITY_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DEAL_NUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TRSS_POSITION_LOCK_POSITION-DEAL_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TRSS_POSITION_LOCK_POSITION-DEAL_NUMBER.
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_TRSS_POSITION_LOCK_POSITION_STR, 
COMPANY_CODE TYPE STRING,
SECURITY_ACCOUNT TYPE STRING,
SECURITY_ID TYPE STRING,
UNITS TYPE STRING,
NOMINAL_CURR TYPE STRING,
NOMINAL_AMT TYPE STRING,
NOMINAL_ORG_AMT TYPE STRING,
GUARD_DATE TYPE STRING,
GUARD_DATE_TO TYPE STRING,
SORT_DATE TYPE STRING,
LOCK_FLAG TYPE STRING,
LOCK_FLAG_TXT TYPE STRING,
POS_LOCK_CAT TYPE STRING,
POS_LOCK_CAT_TEXT TYPE STRING,
DEAL_NUMBER TYPE STRING,
RERF TYPE STRING,
DERF TYPE STRING,
TERF TYPE STRING,
REHER TYPE STRING,
RBEAR TYPE STRING,
DBEAR TYPE STRING,
TBEAR TYPE STRING,
RBHER TYPE STRING,
OWNER TYPE STRING,
OWNER_TEXT TYPE STRING,
GUARD_ID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TRSS_POSITION_LOCK_POSITION_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_TRSS_POSITION_LOCK_POSITION_STR-COMPANY_CODE sy-vline 
WA_TRSS_POSITION_LOCK_POSITION_STR-SECURITY_ACCOUNT sy-vline 
WA_TRSS_POSITION_LOCK_POSITION_STR-SECURITY_ID sy-vline 
WA_TRSS_POSITION_LOCK_POSITION_STR-UNITS sy-vline 
WA_TRSS_POSITION_LOCK_POSITION_STR-NOMINAL_CURR sy-vline 
WA_TRSS_POSITION_LOCK_POSITION_STR-NOMINAL_AMT sy-vline 
WA_TRSS_POSITION_LOCK_POSITION_STR-NOMINAL_ORG_AMT sy-vline 
WA_TRSS_POSITION_LOCK_POSITION_STR-GUARD_DATE sy-vline 
WA_TRSS_POSITION_LOCK_POSITION_STR-GUARD_DATE_TO sy-vline 
WA_TRSS_POSITION_LOCK_POSITION_STR-SORT_DATE sy-vline 
WA_TRSS_POSITION_LOCK_POSITION_STR-LOCK_FLAG sy-vline 
WA_TRSS_POSITION_LOCK_POSITION_STR-LOCK_FLAG_TXT sy-vline 
WA_TRSS_POSITION_LOCK_POSITION_STR-POS_LOCK_CAT sy-vline 
WA_TRSS_POSITION_LOCK_POSITION_STR-POS_LOCK_CAT_TEXT sy-vline 
WA_TRSS_POSITION_LOCK_POSITION_STR-DEAL_NUMBER sy-vline 
WA_TRSS_POSITION_LOCK_POSITION_STR-RERF sy-vline 
WA_TRSS_POSITION_LOCK_POSITION_STR-DERF sy-vline 
WA_TRSS_POSITION_LOCK_POSITION_STR-TERF sy-vline 
WA_TRSS_POSITION_LOCK_POSITION_STR-REHER sy-vline 
WA_TRSS_POSITION_LOCK_POSITION_STR-RBEAR sy-vline 
WA_TRSS_POSITION_LOCK_POSITION_STR-DBEAR sy-vline 
WA_TRSS_POSITION_LOCK_POSITION_STR-TBEAR sy-vline 
WA_TRSS_POSITION_LOCK_POSITION_STR-RBHER sy-vline 
WA_TRSS_POSITION_LOCK_POSITION_STR-OWNER sy-vline 
WA_TRSS_POSITION_LOCK_POSITION_STR-OWNER_TEXT sy-vline 
WA_TRSS_POSITION_LOCK_POSITION_STR-GUARD_ID sy-vline      INTO ld_text SEPARATED BY SPACE.

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