ABAP Select data from SAP table BAPITRMAIN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPITRMAIN
*  INTO TABLE @DATA(IT_BAPITRMAIN2).
*--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_BAPITRMAIN INDEX 1 INTO DATA(WA_BAPITRMAIN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPITRMAIN>-DEP_DATE = 1.
<BAPITRMAIN>-DEP_TIME = 1.
<BAPITRMAIN>-ARR_DATE = 1.
<BAPITRMAIN>-ARR_TIME = 1.
<BAPITRMAIN>-CUSTOMER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPITRMAIN-LOCATION, sy-vline,
  WA_BAPITRMAIN-COUNTRY, sy-vline,
  WA_BAPITRMAIN-REGION, sy-vline,
  WA_BAPITRMAIN-OUT_DATE, sy-vline,
  WA_BAPITRMAIN-OUT_TIME, sy-vline,
  WA_BAPITRMAIN-RET_DATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPITRMAIN 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_BAPITRMAIN 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_BAPITRMAIN INTO WA_BAPITRMAIN.


*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 CITY_CODE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPITRMAIN-CITY_CODE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPITRMAIN-CITY_CODE.
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_BAPITRMAIN_STR, 
DEP_DATE TYPE STRING,
DEP_TIME TYPE STRING,
ARR_DATE TYPE STRING,
ARR_TIME TYPE STRING,
CUSTOMER TYPE STRING,
LOCATION TYPE STRING,
COUNTRY TYPE STRING,
REGION TYPE STRING,
OUT_DATE TYPE STRING,
OUT_TIME TYPE STRING,
RET_DATE TYPE STRING,
RET_TIME TYPE STRING,
RET_COUN TYPE STRING,
RET_RGIO TYPE STRING,
RET_TTCS TYPE STRING,
T_SCHEMA TYPE STRING,
TT_COMSP TYPE STRING,
TT_STATU TYPE STRING,
T_ACTYPE TYPE STRING,
PD_MEALS TYPE STRING,
PD_ACCOM TYPE STRING,
NO_NIGHT TYPE STRING,
PSTLZ TYPE STRING,
ORT01 TYPE STRING,
STRAS TYPE STRING,
STATE TYPE STRING,
REQUEST TYPE STRING,
TRAVEL_PLAN TYPE STRING,
EXPENSES TYPE STRING,
ORT02 TYPE STRING,
CITY_CODE TYPE STRING,
TAX_PER_DIEM TYPE STRING,
TAX_PD_MAN TYPE STRING,
TAX_OV_MAN TYPE STRING,
EXCHANGE_DATE TYPE STRING,
ROUNDING TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPITRMAIN_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_BAPITRMAIN_STR-DEP_DATE sy-vline 
WA_BAPITRMAIN_STR-DEP_TIME sy-vline 
WA_BAPITRMAIN_STR-ARR_DATE sy-vline 
WA_BAPITRMAIN_STR-ARR_TIME sy-vline 
WA_BAPITRMAIN_STR-CUSTOMER sy-vline 
WA_BAPITRMAIN_STR-LOCATION sy-vline 
WA_BAPITRMAIN_STR-COUNTRY sy-vline 
WA_BAPITRMAIN_STR-REGION sy-vline 
WA_BAPITRMAIN_STR-OUT_DATE sy-vline 
WA_BAPITRMAIN_STR-OUT_TIME sy-vline 
WA_BAPITRMAIN_STR-RET_DATE sy-vline 
WA_BAPITRMAIN_STR-RET_TIME sy-vline 
WA_BAPITRMAIN_STR-RET_COUN sy-vline 
WA_BAPITRMAIN_STR-RET_RGIO sy-vline 
WA_BAPITRMAIN_STR-RET_TTCS sy-vline 
WA_BAPITRMAIN_STR-T_SCHEMA sy-vline 
WA_BAPITRMAIN_STR-TT_COMSP sy-vline 
WA_BAPITRMAIN_STR-TT_STATU sy-vline 
WA_BAPITRMAIN_STR-T_ACTYPE sy-vline 
WA_BAPITRMAIN_STR-PD_MEALS sy-vline 
WA_BAPITRMAIN_STR-PD_ACCOM sy-vline 
WA_BAPITRMAIN_STR-NO_NIGHT sy-vline 
WA_BAPITRMAIN_STR-PSTLZ sy-vline 
WA_BAPITRMAIN_STR-ORT01 sy-vline 
WA_BAPITRMAIN_STR-STRAS sy-vline 
WA_BAPITRMAIN_STR-STATE sy-vline 
WA_BAPITRMAIN_STR-REQUEST sy-vline 
WA_BAPITRMAIN_STR-TRAVEL_PLAN sy-vline 
WA_BAPITRMAIN_STR-EXPENSES sy-vline 
WA_BAPITRMAIN_STR-ORT02 sy-vline 
WA_BAPITRMAIN_STR-CITY_CODE sy-vline 
WA_BAPITRMAIN_STR-TAX_PER_DIEM sy-vline 
WA_BAPITRMAIN_STR-TAX_PD_MAN sy-vline 
WA_BAPITRMAIN_STR-TAX_OV_MAN sy-vline 
WA_BAPITRMAIN_STR-EXCHANGE_DATE sy-vline 
WA_BAPITRMAIN_STR-ROUNDING sy-vline      INTO ld_text SEPARATED BY SPACE.

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