ABAP Select data from SAP table LINEBAL_DB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LINEBAL_DB
*  INTO TABLE @DATA(IT_LINEBAL_DB2).
*--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_LINEBAL_DB INDEX 1 INTO DATA(WA_LINEBAL_DB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LINEBAL_DB>-MANDT = 1.
<LINEBAL_DB>-LBGUID = 1.
<LINEBAL_DB>-LBNAME = 1.
<LINEBAL_DB>-PNGUID = 1.
<LINEBAL_DB>-MMGUID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LINEBAL_DB-TIMSTMP, sy-vline,
  WA_LINEBAL_DB-CREADAT, sy-vline,
  WA_LINEBAL_DB-CREABY, sy-vline,
  WA_LINEBAL_DB-CHNGDAT, sy-vline,
  WA_LINEBAL_DB-CHNGBY, sy-vline,
  WA_LINEBAL_DB-LOGSYS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LINEBAL_DB 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_LINEBAL_DB 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_LINEBAL_DB INTO WA_LINEBAL_DB.


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

*Conversion exit CUNIT, internal->external for field LBRATE_QUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LINEBAL_DB-LBRATE_QUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LINEBAL_DB-LBRATE_QUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field LBRATE_TUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LINEBAL_DB-LBRATE_TUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LINEBAL_DB-LBRATE_TUNIT.
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_LINEBAL_DB_STR, 
MANDT TYPE STRING,
LBGUID TYPE STRING,
LBNAME TYPE STRING,
PNGUID TYPE STRING,
MMGUID TYPE STRING,
TIMSTMP TYPE STRING,
CREADAT TYPE STRING,
CREABY TYPE STRING,
CHNGDAT TYPE STRING,
CHNGBY TYPE STRING,
LOGSYS TYPE STRING,
LBRATE_QUANT TYPE STRING,
LBRATE_QUNIT TYPE STRING,
LBRATE_TIME TYPE STRING,
LBRATE_TUNIT TYPE STRING,
LINEALLOC_CHECK TYPE STRING,
DBOP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LINEBAL_DB_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_LINEBAL_DB_STR-MANDT sy-vline 
WA_LINEBAL_DB_STR-LBGUID sy-vline 
WA_LINEBAL_DB_STR-LBNAME sy-vline 
WA_LINEBAL_DB_STR-PNGUID sy-vline 
WA_LINEBAL_DB_STR-MMGUID sy-vline 
WA_LINEBAL_DB_STR-TIMSTMP sy-vline 
WA_LINEBAL_DB_STR-CREADAT sy-vline 
WA_LINEBAL_DB_STR-CREABY sy-vline 
WA_LINEBAL_DB_STR-CHNGDAT sy-vline 
WA_LINEBAL_DB_STR-CHNGBY sy-vline 
WA_LINEBAL_DB_STR-LOGSYS sy-vline 
WA_LINEBAL_DB_STR-LBRATE_QUANT sy-vline 
WA_LINEBAL_DB_STR-LBRATE_QUNIT sy-vline 
WA_LINEBAL_DB_STR-LBRATE_TIME sy-vline 
WA_LINEBAL_DB_STR-LBRATE_TUNIT sy-vline 
WA_LINEBAL_DB_STR-LINEALLOC_CHECK sy-vline 
WA_LINEBAL_DB_STR-DBOP sy-vline      INTO ld_text SEPARATED BY SPACE.

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