ABAP Select data from SAP table MMRP_MAT_CON into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMRP_MAT_CON
*  INTO TABLE @DATA(IT_MMRP_MAT_CON2).
*--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_MMRP_MAT_CON INDEX 1 INTO DATA(WA_MMRP_MAT_CON2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMRP_MAT_CON>-MANDT = 1.
<MMRP_MAT_CON>-MATID = 1.
<MMRP_MAT_CON>-LOCID = 1.
<MMRP_MAT_CON>-SIMVERSION = 1.
<MMRP_MAT_CON>-CHECK_HL_ERRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMRP_MAT_CON-CHK_MAND_ERRS, sy-vline,
  WA_MMRP_MAT_CON-PROGRESS, sy-vline,
  WA_MMRP_MAT_CON-MAX_BOM_SELE, sy-vline,
  WA_MMRP_MAT_CON-USE_KNOBJ_BUF, sy-vline,
  WA_MMRP_MAT_CON-NUM_PARALLEL, sy-vline,
  WA_MMRP_MAT_CON-CR_ACT_MATRIX_FC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMRP_MAT_CON 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_MMRP_MAT_CON 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_MMRP_MAT_CON INTO WA_MMRP_MAT_CON.


*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 PRDID, internal->external for field MATID
CALL FUNCTION 'CONVERSION_EXIT_PRDID_OUTPUT'
  EXPORTING
    input =                      WA_MMRP_MAT_CON-MATID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMRP_MAT_CON-MATID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit LOCID, internal->external for field LOCID
CALL FUNCTION 'CONVERSION_EXIT_LOCID_OUTPUT'
  EXPORTING
    input =                      WA_MMRP_MAT_CON-LOCID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMRP_MAT_CON-LOCID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit VRSIO, internal->external for field SIMVERSION
CALL FUNCTION 'CONVERSION_EXIT_VRSIO_OUTPUT'
  EXPORTING
    input =                      WA_MMRP_MAT_CON-SIMVERSION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMRP_MAT_CON-SIMVERSION.
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_MMRP_MAT_CON_STR, 
MANDT TYPE STRING,
MATID TYPE STRING,
LOCID TYPE STRING,
SIMVERSION TYPE STRING,
CHECK_HL_ERRS TYPE STRING,
CHK_MAND_ERRS TYPE STRING,
PROGRESS TYPE STRING,
MAX_BOM_SELE TYPE STRING,
USE_KNOBJ_BUF TYPE STRING,
NUM_PARALLEL TYPE STRING,
CR_ACT_MATRIX_FC TYPE STRING,
CR_ACT_MATRIX TYPE STRING,
INIT_POSVARS TYPE STRING,
DYNAMIC_HORIZON TYPE STRING,
KEEP_FC_BITS TYPE STRING,
REQS_IN_FC_MAT TYPE STRING,
USE_BF_MATRIX TYPE STRING,
NUM_ORD_FC_MAT TYPE STRING,
TRANSP_MAT TYPE STRING,
EXECUTION_HORIZ TYPE STRING,
USE_TIME_LINES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMRP_MAT_CON_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_MMRP_MAT_CON_STR-MANDT sy-vline 
WA_MMRP_MAT_CON_STR-MATID sy-vline 
WA_MMRP_MAT_CON_STR-LOCID sy-vline 
WA_MMRP_MAT_CON_STR-SIMVERSION sy-vline 
WA_MMRP_MAT_CON_STR-CHECK_HL_ERRS sy-vline 
WA_MMRP_MAT_CON_STR-CHK_MAND_ERRS sy-vline 
WA_MMRP_MAT_CON_STR-PROGRESS sy-vline 
WA_MMRP_MAT_CON_STR-MAX_BOM_SELE sy-vline 
WA_MMRP_MAT_CON_STR-USE_KNOBJ_BUF sy-vline 
WA_MMRP_MAT_CON_STR-NUM_PARALLEL sy-vline 
WA_MMRP_MAT_CON_STR-CR_ACT_MATRIX_FC sy-vline 
WA_MMRP_MAT_CON_STR-CR_ACT_MATRIX sy-vline 
WA_MMRP_MAT_CON_STR-INIT_POSVARS sy-vline 
WA_MMRP_MAT_CON_STR-DYNAMIC_HORIZON sy-vline 
WA_MMRP_MAT_CON_STR-KEEP_FC_BITS sy-vline 
WA_MMRP_MAT_CON_STR-REQS_IN_FC_MAT sy-vline 
WA_MMRP_MAT_CON_STR-USE_BF_MATRIX sy-vline 
WA_MMRP_MAT_CON_STR-NUM_ORD_FC_MAT sy-vline 
WA_MMRP_MAT_CON_STR-TRANSP_MAT sy-vline 
WA_MMRP_MAT_CON_STR-EXECUTION_HORIZ sy-vline 
WA_MMRP_MAT_CON_STR-USE_TIME_LINES sy-vline      INTO ld_text SEPARATED BY SPACE.

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