ABAP Select data from SAP table BAPI_MRP_TOTAL_LINES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPI_MRP_TOTAL_LINES
*  INTO TABLE @DATA(IT_BAPI_MRP_TOTAL_LINES2).
*--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_BAPI_MRP_TOTAL_LINES INDEX 1 INTO DATA(WA_BAPI_MRP_TOTAL_LINES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPI_MRP_TOTAL_LINES>-PLNGSEGMT = 1.
<BAPI_MRP_TOTAL_LINES>-PLNGSEGNO = 1.
<BAPI_MRP_TOTAL_LINES>-SORT_DATE = 1.
<BAPI_MRP_TOTAL_LINES>-MRP_ELEMENT_IND = 1.
<BAPI_MRP_TOTAL_LINES>-AVAIL_DATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPI_MRP_TOTAL_LINES-PERIOD_IND, sy-vline,
  WA_BAPI_MRP_TOTAL_LINES-FORECAST_PERIOD, sy-vline,
  WA_BAPI_MRP_TOTAL_LINES-NO_WRKDAYS, sy-vline,
  WA_BAPI_MRP_TOTAL_LINES-PER_SEGMT, sy-vline,
  WA_BAPI_MRP_TOTAL_LINES-PLD_IND_REQS, sy-vline,
  WA_BAPI_MRP_TOTAL_LINES-REQMTS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPI_MRP_TOTAL_LINES 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_BAPI_MRP_TOTAL_LINES 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_BAPI_MRP_TOTAL_LINES INTO WA_BAPI_MRP_TOTAL_LINES.


*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_BAPI_MRP_TOTAL_LINES_STR, 
PLNGSEGMT TYPE STRING,
PLNGSEGNO TYPE STRING,
SORT_DATE TYPE STRING,
MRP_ELEMENT_IND TYPE STRING,
AVAIL_DATE TYPE STRING,
PERIOD_IND TYPE STRING,
FORECAST_PERIOD TYPE STRING,
NO_WRKDAYS TYPE STRING,
PER_SEGMT TYPE STRING,
PLD_IND_REQS TYPE STRING,
REQMTS TYPE STRING,
RECEIPTS TYPE STRING,
AVAIL_QTY TYPE STRING,
ATP_QTY TYPE STRING,
NON_AVL_RPT TYPE STRING,
NON_AVL_ISS TYPE STRING,
STAT_COVERAGE TYPE STRING,
TARGET_COVERAGE TYPE STRING,
MIN_COVERAGE TYPE STRING,
MAX_COVERAGE TYPE STRING,
TARGETSTOCK TYPE STRING,
MIN_STOCK TYPE STRING,
MAX_STOCK TYPE STRING,
DAILY_REQS TYPE STRING,
DAILY_PRODQTY TYPE STRING,
ACTL_COVERAGE TYPE STRING,
REQDAYSSUPPLY1 TYPE STRING,
NO_ORD_PROPS TYPE STRING,
NO_RECPTS TYPE STRING,
INT_TABLE_IND1 TYPE STRING,
INT_TABLE_IND2 TYPE STRING,
FBYTE TYPE STRING,
EXC_COL1 TYPE STRING,
EXC_COL2 TYPE STRING,
EXC_COL3 TYPE STRING,
EXC_COL4 TYPE STRING,
USER_EXIT1 TYPE STRING,
USER_EXIT2 TYPE STRING,
USER_EXIT3 TYPE STRING,
ICON_TEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPI_MRP_TOTAL_LINES_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_BAPI_MRP_TOTAL_LINES_STR-PLNGSEGMT sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-PLNGSEGNO sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-SORT_DATE sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-MRP_ELEMENT_IND sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-AVAIL_DATE sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-PERIOD_IND sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-FORECAST_PERIOD sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-NO_WRKDAYS sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-PER_SEGMT sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-PLD_IND_REQS sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-REQMTS sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-RECEIPTS sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-AVAIL_QTY sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-ATP_QTY sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-NON_AVL_RPT sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-NON_AVL_ISS sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-STAT_COVERAGE sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-TARGET_COVERAGE sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-MIN_COVERAGE sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-MAX_COVERAGE sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-TARGETSTOCK sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-MIN_STOCK sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-MAX_STOCK sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-DAILY_REQS sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-DAILY_PRODQTY sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-ACTL_COVERAGE sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-REQDAYSSUPPLY1 sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-NO_ORD_PROPS sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-NO_RECPTS sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-INT_TABLE_IND1 sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-INT_TABLE_IND2 sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-FBYTE sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-EXC_COL1 sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-EXC_COL2 sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-EXC_COL3 sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-EXC_COL4 sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-USER_EXIT1 sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-USER_EXIT2 sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-USER_EXIT3 sy-vline 
WA_BAPI_MRP_TOTAL_LINES_STR-ICON_TEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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