ABAP Select data from SAP table MPO_CCMON_RULES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MPO_CCMON_RULES
*  INTO TABLE @DATA(IT_MPO_CCMON_RULES2).
*--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_MPO_CCMON_RULES INDEX 1 INTO DATA(WA_MPO_CCMON_RULES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MPO_CCMON_RULES>-MANDT = 1.
<MPO_CCMON_RULES>-UNAME = 1.
<MPO_CCMON_RULES>-RULE_ID = 1.
<MPO_CCMON_RULES>-RULE_INVALID = 1.
<MPO_CCMON_RULES>-EXC_TYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MPO_CCMON_RULES-WRTTP1, sy-vline,
  WA_MPO_CCMON_RULES-WRTTP2, sy-vline,
  WA_MPO_CCMON_RULES-ABS_VAR, sy-vline,
  WA_MPO_CCMON_RULES-ABS_REL, sy-vline,
  WA_MPO_CCMON_RULES-OPERATOR, sy-vline,
  WA_MPO_CCMON_RULES-EXC_VALUE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MPO_CCMON_RULES 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_MPO_CCMON_RULES 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_MPO_CCMON_RULES INTO WA_MPO_CCMON_RULES.


*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 WRTTP1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MPO_CCMON_RULES-WRTTP1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPO_CCMON_RULES-WRTTP1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WRTTP2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MPO_CCMON_RULES-WRTTP2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPO_CCMON_RULES-WRTTP2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KSTAR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MPO_CCMON_RULES-KSTAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPO_CCMON_RULES-KSTAR.
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_MPO_CCMON_RULES_STR, 
MANDT TYPE STRING,
UNAME TYPE STRING,
RULE_ID TYPE STRING,
RULE_INVALID TYPE STRING,
EXC_TYPE TYPE STRING,
WRTTP1 TYPE STRING,
WRTTP2 TYPE STRING,
ABS_VAR TYPE STRING,
ABS_REL TYPE STRING,
OPERATOR TYPE STRING,
EXC_VALUE TYPE STRING,
WAERS TYPE STRING,
KOKRSWAERS TYPE STRING,
NAME TYPE STRING,
KOKRS TYPE STRING,
OBJNR TYPE STRING,
SETID TYPE STRING,
KOSTL_SPECIAL TYPE STRING,
KSTAR TYPE STRING,
KAGRU TYPE STRING,
KSTAR_SPECIAL TYPE STRING,
PERIOD TYPE STRING,
CHKPREVPER TYPE STRING,
STATISTIC TYPE STRING,
CONFSTAMP TYPE STRING,
DEFAULT_RULE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MPO_CCMON_RULES_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_MPO_CCMON_RULES_STR-MANDT sy-vline 
WA_MPO_CCMON_RULES_STR-UNAME sy-vline 
WA_MPO_CCMON_RULES_STR-RULE_ID sy-vline 
WA_MPO_CCMON_RULES_STR-RULE_INVALID sy-vline 
WA_MPO_CCMON_RULES_STR-EXC_TYPE sy-vline 
WA_MPO_CCMON_RULES_STR-WRTTP1 sy-vline 
WA_MPO_CCMON_RULES_STR-WRTTP2 sy-vline 
WA_MPO_CCMON_RULES_STR-ABS_VAR sy-vline 
WA_MPO_CCMON_RULES_STR-ABS_REL sy-vline 
WA_MPO_CCMON_RULES_STR-OPERATOR sy-vline 
WA_MPO_CCMON_RULES_STR-EXC_VALUE sy-vline 
WA_MPO_CCMON_RULES_STR-WAERS sy-vline 
WA_MPO_CCMON_RULES_STR-KOKRSWAERS sy-vline 
WA_MPO_CCMON_RULES_STR-NAME sy-vline 
WA_MPO_CCMON_RULES_STR-KOKRS sy-vline 
WA_MPO_CCMON_RULES_STR-OBJNR sy-vline 
WA_MPO_CCMON_RULES_STR-SETID sy-vline 
WA_MPO_CCMON_RULES_STR-KOSTL_SPECIAL sy-vline 
WA_MPO_CCMON_RULES_STR-KSTAR sy-vline 
WA_MPO_CCMON_RULES_STR-KAGRU sy-vline 
WA_MPO_CCMON_RULES_STR-KSTAR_SPECIAL sy-vline 
WA_MPO_CCMON_RULES_STR-PERIOD sy-vline 
WA_MPO_CCMON_RULES_STR-CHKPREVPER sy-vline 
WA_MPO_CCMON_RULES_STR-STATISTIC sy-vline 
WA_MPO_CCMON_RULES_STR-CONFSTAMP sy-vline 
WA_MPO_CCMON_RULES_STR-DEFAULT_RULE sy-vline      INTO ld_text SEPARATED BY SPACE.

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