ABAP Select data from SAP table MMRP_SCHED_PARAMS into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP MMRP_SCHED_PARAMS 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_SCHED_PARAMS. 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_SCHED_PARAMS 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_SCHED_PARAMS TYPE STANDARD TABLE OF MMRP_SCHED_PARAMS,
      WA_MMRP_SCHED_PARAMS TYPE MMRP_SCHED_PARAMS,
      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_SCHED_PARAMS> TYPE MMRP_SCHED_PARAMS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMRP_SCHED_PARAMS
*  INTO TABLE @DATA(IT_MMRP_SCHED_PARAMS2).
*--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_SCHED_PARAMS INDEX 1 INTO DATA(WA_MMRP_SCHED_PARAMS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMRP_SCHED_PARAMS>-WHATEVER = 1.
<MMRP_SCHED_PARAMS>-AGGREGATION = 1.
<MMRP_SCHED_PARAMS>-EVAL_BF_INFO = 1.
<MMRP_SCHED_PARAMS>-SCHEDULER = 1.
<MMRP_SCHED_PARAMS>-EXPLDATE_FINDER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMRP_SCHED_PARAMS-IGNORE_RELEVANCE, sy-vline,
  WA_MMRP_SCHED_PARAMS-WITH_PV_LIST, sy-vline,
  WA_MMRP_SCHED_PARAMS-EVAL_WRKC_INFO, sy-vline,
  WA_MMRP_SCHED_PARAMS-EVAL_TIME_RANGE, sy-vline,
  WA_MMRP_SCHED_PARAMS-RANGE_START_TIME, sy-vline,
  WA_MMRP_SCHED_PARAMS-RANGE_END_TIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMRP_SCHED_PARAMS 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_SCHED_PARAMS 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_SCHED_PARAMS INTO WA_MMRP_SCHED_PARAMS.


*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 TSTPS, internal->external for field RANGE_START_TIME
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_MMRP_SCHED_PARAMS-RANGE_START_TIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMRP_SCHED_PARAMS-RANGE_START_TIME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field RANGE_END_TIME
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_MMRP_SCHED_PARAMS-RANGE_END_TIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMRP_SCHED_PARAMS-RANGE_END_TIME.
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_SCHED_PARAMS_STR, 
WHATEVER TYPE STRING,
AGGREGATION TYPE STRING,
EVAL_BF_INFO TYPE STRING,
SCHEDULER TYPE STRING,
EXPLDATE_FINDER TYPE STRING,
IGNORE_RELEVANCE TYPE STRING,
WITH_PV_LIST TYPE STRING,
EVAL_WRKC_INFO TYPE STRING,
EVAL_TIME_RANGE TYPE STRING,
RANGE_START_TIME TYPE STRING,
RANGE_END_TIME TYPE STRING,
USE_BALANCING TYPE STRING,
ALT_PATH TYPE STRING,
EVAL_ACTS TYPE STRING,
EVAL_POSVARS TYPE STRING,
REPORT_BACKFLUSHED TYPE STRING,
RETURN_PHANTOMS TYPE STRING,
RESERVE1 TYPE STRING,
RESERVE2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMRP_SCHED_PARAMS_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_SCHED_PARAMS_STR-WHATEVER sy-vline 
WA_MMRP_SCHED_PARAMS_STR-AGGREGATION sy-vline 
WA_MMRP_SCHED_PARAMS_STR-EVAL_BF_INFO sy-vline 
WA_MMRP_SCHED_PARAMS_STR-SCHEDULER sy-vline 
WA_MMRP_SCHED_PARAMS_STR-EXPLDATE_FINDER sy-vline 
WA_MMRP_SCHED_PARAMS_STR-IGNORE_RELEVANCE sy-vline 
WA_MMRP_SCHED_PARAMS_STR-WITH_PV_LIST sy-vline 
WA_MMRP_SCHED_PARAMS_STR-EVAL_WRKC_INFO sy-vline 
WA_MMRP_SCHED_PARAMS_STR-EVAL_TIME_RANGE sy-vline 
WA_MMRP_SCHED_PARAMS_STR-RANGE_START_TIME sy-vline 
WA_MMRP_SCHED_PARAMS_STR-RANGE_END_TIME sy-vline 
WA_MMRP_SCHED_PARAMS_STR-USE_BALANCING sy-vline 
WA_MMRP_SCHED_PARAMS_STR-ALT_PATH sy-vline 
WA_MMRP_SCHED_PARAMS_STR-EVAL_ACTS sy-vline 
WA_MMRP_SCHED_PARAMS_STR-EVAL_POSVARS sy-vline 
WA_MMRP_SCHED_PARAMS_STR-REPORT_BACKFLUSHED sy-vline 
WA_MMRP_SCHED_PARAMS_STR-RETURN_PHANTOMS sy-vline 
WA_MMRP_SCHED_PARAMS_STR-RESERVE1 sy-vline 
WA_MMRP_SCHED_PARAMS_STR-RESERVE2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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