ABAP Select data from SAP table BAPIINSTPLN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPIINSTPLN
*  INTO TABLE @DATA(IT_BAPIINSTPLN2).
*--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_BAPIINSTPLN INDEX 1 INTO DATA(WA_BAPIINSTPLN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPIINSTPLN>-DOC_DATE = 1.
<BAPIINSTPLN>-PSTNG_DATE = 1.
<BAPIINSTPLN>-DOC_TYPE = 1.
<BAPIINSTPLN>-STARTDATE = 1.
<BAPIINSTPLN>-INST_AMNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPIINSTPLN-DISTANCE, sy-vline,
  WA_BAPIINSTPLN-INST_INTRVAL, sy-vline,
  WA_BAPIINSTPLN-ROUND_TO, sy-vline,
  WA_BAPIINSTPLN-INST_CAT, sy-vline,
  WA_BAPIINSTPLN-CHARGE_AMNT, sy-vline,
  WA_BAPIINSTPLN-REMAINAMNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPIINSTPLN 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_BAPIINSTPLN 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_BAPIINSTPLN INTO WA_BAPIINSTPLN.


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

*Conversion exit ALPHA, internal->external for field CONT_ACCT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPIINSTPLN-CONT_ACCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPIINSTPLN-CONT_ACCT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOC_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPIINSTPLN-DOC_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPIINSTPLN-DOC_NO.
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_BAPIINSTPLN_STR, 
DOC_DATE TYPE STRING,
PSTNG_DATE TYPE STRING,
DOC_TYPE TYPE STRING,
STARTDATE TYPE STRING,
INST_AMNT TYPE STRING,
DISTANCE TYPE STRING,
INST_INTRVAL TYPE STRING,
ROUND_TO TYPE STRING,
INST_CAT TYPE STRING,
CHARGE_AMNT TYPE STRING,
REMAINAMNT TYPE STRING,
CH_DOC_TYPE TYPE STRING,
FIKEY TYPE STRING,
INT_ST_DTE TYPE STRING,
INT_KEY TYPE STRING,
INT_DOC_TYPE TYPE STRING,
BUSPARTNER TYPE STRING,
CONT_ACCT TYPE STRING,
DETAILED TYPE STRING,
INST_NUMBER TYPE STRING,
DOC_NO TYPE STRING,
CURRENCY TYPE STRING,
SIMULATION TYPE STRING,
ACCUMULATE TYPE STRING,
CATEGORY TYPE STRING,
INT_DOC_DUE TYPE STRING,
INT_CH_DISTR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPIINSTPLN_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_BAPIINSTPLN_STR-DOC_DATE sy-vline 
WA_BAPIINSTPLN_STR-PSTNG_DATE sy-vline 
WA_BAPIINSTPLN_STR-DOC_TYPE sy-vline 
WA_BAPIINSTPLN_STR-STARTDATE sy-vline 
WA_BAPIINSTPLN_STR-INST_AMNT sy-vline 
WA_BAPIINSTPLN_STR-DISTANCE sy-vline 
WA_BAPIINSTPLN_STR-INST_INTRVAL sy-vline 
WA_BAPIINSTPLN_STR-ROUND_TO sy-vline 
WA_BAPIINSTPLN_STR-INST_CAT sy-vline 
WA_BAPIINSTPLN_STR-CHARGE_AMNT sy-vline 
WA_BAPIINSTPLN_STR-REMAINAMNT sy-vline 
WA_BAPIINSTPLN_STR-CH_DOC_TYPE sy-vline 
WA_BAPIINSTPLN_STR-FIKEY sy-vline 
WA_BAPIINSTPLN_STR-INT_ST_DTE sy-vline 
WA_BAPIINSTPLN_STR-INT_KEY sy-vline 
WA_BAPIINSTPLN_STR-INT_DOC_TYPE sy-vline 
WA_BAPIINSTPLN_STR-BUSPARTNER sy-vline 
WA_BAPIINSTPLN_STR-CONT_ACCT sy-vline 
WA_BAPIINSTPLN_STR-DETAILED sy-vline 
WA_BAPIINSTPLN_STR-INST_NUMBER sy-vline 
WA_BAPIINSTPLN_STR-DOC_NO sy-vline 
WA_BAPIINSTPLN_STR-CURRENCY sy-vline 
WA_BAPIINSTPLN_STR-SIMULATION sy-vline 
WA_BAPIINSTPLN_STR-ACCUMULATE sy-vline 
WA_BAPIINSTPLN_STR-CATEGORY sy-vline 
WA_BAPIINSTPLN_STR-INT_DOC_DUE sy-vline 
WA_BAPIINSTPLN_STR-INT_CH_DISTR sy-vline      INTO ld_text SEPARATED BY SPACE.

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