ABAP Select data from SAP table BASE_REC_TRANS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BASE_REC_TRANS
*  INTO TABLE @DATA(IT_BASE_REC_TRANS2).
*--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_BASE_REC_TRANS INDEX 1 INTO DATA(WA_BASE_REC_TRANS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BASE_REC_TRANS>-MATCODE = 1.
<BASE_REC_TRANS>-RECCODE = 1.
<BASE_REC_TRANS>-RECLEN = 1.
<BASE_REC_TRANS>-TRANS_NO = 1.
<BASE_REC_TRANS>-FILE_CODE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BASE_REC_TRANS-ENTRY_DATE, sy-vline,
  WA_BASE_REC_TRANS-VALUE_DATE, sy-vline,
  WA_BASE_REC_TRANS-PAYM_DATE, sy-vline,
  WA_BASE_REC_TRANS-TRANS_CODE, sy-vline,
  WA_BASE_REC_TRANS-ENTRY_CODE, sy-vline,
  WA_BASE_REC_TRANS-ENTRY_TEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BASE_REC_TRANS 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_BASE_REC_TRANS 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_BASE_REC_TRANS INTO WA_BASE_REC_TRANS.


*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_BASE_REC_TRANS_STR, 
MATCODE TYPE STRING,
RECCODE TYPE STRING,
RECLEN TYPE STRING,
TRANS_NO TYPE STRING,
FILE_CODE TYPE STRING,
ENTRY_DATE TYPE STRING,
VALUE_DATE TYPE STRING,
PAYM_DATE TYPE STRING,
TRANS_CODE TYPE STRING,
ENTRY_CODE TYPE STRING,
ENTRY_TEXT TYPE STRING,
EPVOZ TYPE STRING,
AMOUNT_EP TYPE STRING,
RECEIPT TYPE STRING,
TRANS_METH TYPE STRING,
PARTNER TYPE STRING,
SOURCE TYPE STRING,
ACC_PARTN TYPE STRING,
CHANGED_NO TYPE STRING,
REFERENCE TYPE STRING,
FORM_NUM TYPE STRING,
LEVEL_CODE TYPE STRING,
AZNUM TYPE STRING,
SEQ_NUMMER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BASE_REC_TRANS_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_BASE_REC_TRANS_STR-MATCODE sy-vline 
WA_BASE_REC_TRANS_STR-RECCODE sy-vline 
WA_BASE_REC_TRANS_STR-RECLEN sy-vline 
WA_BASE_REC_TRANS_STR-TRANS_NO sy-vline 
WA_BASE_REC_TRANS_STR-FILE_CODE sy-vline 
WA_BASE_REC_TRANS_STR-ENTRY_DATE sy-vline 
WA_BASE_REC_TRANS_STR-VALUE_DATE sy-vline 
WA_BASE_REC_TRANS_STR-PAYM_DATE sy-vline 
WA_BASE_REC_TRANS_STR-TRANS_CODE sy-vline 
WA_BASE_REC_TRANS_STR-ENTRY_CODE sy-vline 
WA_BASE_REC_TRANS_STR-ENTRY_TEXT sy-vline 
WA_BASE_REC_TRANS_STR-EPVOZ sy-vline 
WA_BASE_REC_TRANS_STR-AMOUNT_EP sy-vline 
WA_BASE_REC_TRANS_STR-RECEIPT sy-vline 
WA_BASE_REC_TRANS_STR-TRANS_METH sy-vline 
WA_BASE_REC_TRANS_STR-PARTNER sy-vline 
WA_BASE_REC_TRANS_STR-SOURCE sy-vline 
WA_BASE_REC_TRANS_STR-ACC_PARTN sy-vline 
WA_BASE_REC_TRANS_STR-CHANGED_NO sy-vline 
WA_BASE_REC_TRANS_STR-REFERENCE sy-vline 
WA_BASE_REC_TRANS_STR-FORM_NUM sy-vline 
WA_BASE_REC_TRANS_STR-LEVEL_CODE sy-vline 
WA_BASE_REC_TRANS_STR-AZNUM sy-vline 
WA_BASE_REC_TRANS_STR-SEQ_NUMMER sy-vline      INTO ld_text SEPARATED BY SPACE.

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