ABAP Select data from SAP table MCP6_SQ into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MCP6_SQ 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 MCP6_SQ. 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 MCP6_SQ 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_MCP6_SQ TYPE STANDARD TABLE OF MCP6_SQ,
      WA_MCP6_SQ TYPE MCP6_SQ,
      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: <MCP6_SQ> TYPE MCP6_SQ.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MCP6_SQ.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MCP6_SQ
  INTO TABLE IT_MCP6_SQ.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCP6_SQ
*  INTO TABLE @DATA(IT_MCP6_SQ2).
*--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_MCP6_SQ INDEX 1 INTO DATA(WA_MCP6_SQ2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MCP6_SQ ASSIGNING <MCP6_SQ>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCP6_SQ>-BLOCKID = 1.
<MCP6_SQ>-KRIT1 = 1.
<MCP6_SQ>-FNAME = 1.
<MCP6_SQ>-MEINS = 1.
<MCP6_SQ>-MEINI = 1.

ENDLOOP.

LOOP AT IT_MCP6_SQ INTO WA_MCP6_SQ.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCP6_SQ-UFAKT, sy-vline,
  WA_MCP6_SQ-TABLE, sy-vline,
  WA_MCP6_SQ-FIELD, sy-vline,
  WA_MCP6_SQ-RFOFF, sy-vline,
  WA_MCP6_SQ-RFLEN, sy-vline,
  WA_MCP6_SQ-EHTYP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCP6_SQ 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_MCP6_SQ 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_MCP6_SQ INTO WA_MCP6_SQ.


*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 DTYPE, internal->external for field EHTYP
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_MCP6_SQ-EHTYP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCP6_SQ-EHTYP.
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_MCP6_SQ_STR, 
BLOCKID TYPE STRING,
KRIT1 TYPE STRING,
FNAME TYPE STRING,
MEINS TYPE STRING,
MEINI TYPE STRING,
UFAKT TYPE STRING,
TABLE TYPE STRING,
FIELD TYPE STRING,
RFOFF TYPE STRING,
RFLEN TYPE STRING,
EHTYP TYPE STRING,
ANZNK TYPE STRING,
NKFIX TYPE STRING,
REST TYPE STRING,
OBLIG TYPE STRING,
INPUT TYPE STRING,
OUTPUT TYPE STRING,
INTENS TYPE STRING,
HIDDEN TYPE STRING,
LENGTH TYPE STRING,
FLG_CHA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCP6_SQ_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_MCP6_SQ_STR-BLOCKID sy-vline 
WA_MCP6_SQ_STR-KRIT1 sy-vline 
WA_MCP6_SQ_STR-FNAME sy-vline 
WA_MCP6_SQ_STR-MEINS sy-vline 
WA_MCP6_SQ_STR-MEINI sy-vline 
WA_MCP6_SQ_STR-UFAKT sy-vline 
WA_MCP6_SQ_STR-TABLE sy-vline 
WA_MCP6_SQ_STR-FIELD sy-vline 
WA_MCP6_SQ_STR-RFOFF sy-vline 
WA_MCP6_SQ_STR-RFLEN sy-vline 
WA_MCP6_SQ_STR-EHTYP sy-vline 
WA_MCP6_SQ_STR-ANZNK sy-vline 
WA_MCP6_SQ_STR-NKFIX sy-vline 
WA_MCP6_SQ_STR-REST sy-vline 
WA_MCP6_SQ_STR-OBLIG sy-vline 
WA_MCP6_SQ_STR-INPUT sy-vline 
WA_MCP6_SQ_STR-OUTPUT sy-vline 
WA_MCP6_SQ_STR-INTENS sy-vline 
WA_MCP6_SQ_STR-HIDDEN sy-vline 
WA_MCP6_SQ_STR-LENGTH sy-vline 
WA_MCP6_SQ_STR-FLG_CHA sy-vline      INTO ld_text SEPARATED BY SPACE.

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