ABAP Select data from SAP table BTCTLP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BTCTLP
*  INTO TABLE @DATA(IT_BTCTLP2).
*--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_BTCTLP INDEX 1 INTO DATA(WA_BTCTLP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BTCTLP>-MSGPAR1 = 1.
<BTCTLP>-MSGPAR1LEN = 1.
<BTCTLP>-MSGPAR2 = 1.
<BTCTLP>-MSGPAR2LEN = 1.
<BTCTLP>-MSGPAR3 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BTCTLP-MSGPAR3LEN, sy-vline,
  WA_BTCTLP-MSGPAR4, sy-vline,
  WA_BTCTLP-MSGPAR4LEN, sy-vline,
  WA_BTCTLP-MSGPAR5, sy-vline,
  WA_BTCTLP-MSGPAR5LEN, sy-vline,
  WA_BTCTLP-MSGPAR6, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BTCTLP 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_BTCTLP 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_BTCTLP INTO WA_BTCTLP.


*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_BTCTLP_STR, 
MSGPAR1 TYPE STRING,
MSGPAR1LEN TYPE STRING,
MSGPAR2 TYPE STRING,
MSGPAR2LEN TYPE STRING,
MSGPAR3 TYPE STRING,
MSGPAR3LEN TYPE STRING,
MSGPAR4 TYPE STRING,
MSGPAR4LEN TYPE STRING,
MSGPAR5 TYPE STRING,
MSGPAR5LEN TYPE STRING,
MSGPAR6 TYPE STRING,
MSGPAR6LEN TYPE STRING,
MSGPAR7 TYPE STRING,
MSGPAR7LEN TYPE STRING,
MSGPAR8 TYPE STRING,
MSGPAR8LEN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BTCTLP_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_BTCTLP_STR-MSGPAR1 sy-vline 
WA_BTCTLP_STR-MSGPAR1LEN sy-vline 
WA_BTCTLP_STR-MSGPAR2 sy-vline 
WA_BTCTLP_STR-MSGPAR2LEN sy-vline 
WA_BTCTLP_STR-MSGPAR3 sy-vline 
WA_BTCTLP_STR-MSGPAR3LEN sy-vline 
WA_BTCTLP_STR-MSGPAR4 sy-vline 
WA_BTCTLP_STR-MSGPAR4LEN sy-vline 
WA_BTCTLP_STR-MSGPAR5 sy-vline 
WA_BTCTLP_STR-MSGPAR5LEN sy-vline 
WA_BTCTLP_STR-MSGPAR6 sy-vline 
WA_BTCTLP_STR-MSGPAR6LEN sy-vline 
WA_BTCTLP_STR-MSGPAR7 sy-vline 
WA_BTCTLP_STR-MSGPAR7LEN sy-vline 
WA_BTCTLP_STR-MSGPAR8 sy-vline 
WA_BTCTLP_STR-MSGPAR8LEN sy-vline      INTO ld_text SEPARATED BY SPACE.

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