ABAP Select data from SAP table PMNTHLYHISTBYDTE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PMNTHLYHISTBYDTE
*  INTO TABLE @DATA(IT_PMNTHLYHISTBYDTE2).
*--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_PMNTHLYHISTBYDTE INDEX 1 INTO DATA(WA_PMNTHLYHISTBYDTE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PMNTHLYHISTBYDTE>-MANDT = 1.
<PMNTHLYHISTBYDTE>-MATERIAL = 1.
<PMNTHLYHISTBYDTE>-PRODUCTIONPLANT = 1.
<PMNTHLYHISTBYDTE>-MRPAREA = 1.
<PMNTHLYHISTBYDTE>-FORECAST = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PMNTHLYHISTBYDTE-FORECASTYEARMONTH, sy-vline,
  WA_PMNTHLYHISTBYDTE-LASTCHANGEDATE, sy-vline,
  WA_PMNTHLYHISTBYDTE-LASTCHANGETIME, sy-vline,
  WA_PMNTHLYHISTBYDTE-LASTCHANGEDATETIME, sy-vline,
  WA_PMNTHLYHISTBYDTE-POSTINGDATE, sy-vline,
  WA_PMNTHLYHISTBYDTE-CALENDARYEAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PMNTHLYHISTBYDTE 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_PMNTHLYHISTBYDTE 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_PMNTHLYHISTBYDTE INTO WA_PMNTHLYHISTBYDTE.


*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 MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_PMNTHLYHISTBYDTE-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PMNTHLYHISTBYDTE-MATERIAL.
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_PMNTHLYHISTBYDTE_STR, 
MANDT TYPE STRING,
MATERIAL TYPE STRING,
PRODUCTIONPLANT TYPE STRING,
MRPAREA TYPE STRING,
FORECAST TYPE STRING,
FORECASTYEARMONTH TYPE STRING,
LASTCHANGEDATE TYPE STRING,
LASTCHANGETIME TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
POSTINGDATE TYPE STRING,
CALENDARYEAR TYPE STRING,
DELIVERYDATE TYPE STRING,
QUANTITYINBASEUNIT TYPE STRING,
FIRSTDAYOFMONTHDATE TYPE STRING,
LASTDAYOFMONTHDATE TYPE STRING,
CALENDARMONTH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PMNTHLYHISTBYDTE_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_PMNTHLYHISTBYDTE_STR-MANDT sy-vline 
WA_PMNTHLYHISTBYDTE_STR-MATERIAL sy-vline 
WA_PMNTHLYHISTBYDTE_STR-PRODUCTIONPLANT sy-vline 
WA_PMNTHLYHISTBYDTE_STR-MRPAREA sy-vline 
WA_PMNTHLYHISTBYDTE_STR-FORECAST sy-vline 
WA_PMNTHLYHISTBYDTE_STR-FORECASTYEARMONTH sy-vline 
WA_PMNTHLYHISTBYDTE_STR-LASTCHANGEDATE sy-vline 
WA_PMNTHLYHISTBYDTE_STR-LASTCHANGETIME sy-vline 
WA_PMNTHLYHISTBYDTE_STR-LASTCHANGEDATETIME sy-vline 
WA_PMNTHLYHISTBYDTE_STR-POSTINGDATE sy-vline 
WA_PMNTHLYHISTBYDTE_STR-CALENDARYEAR sy-vline 
WA_PMNTHLYHISTBYDTE_STR-DELIVERYDATE sy-vline 
WA_PMNTHLYHISTBYDTE_STR-QUANTITYINBASEUNIT sy-vline 
WA_PMNTHLYHISTBYDTE_STR-FIRSTDAYOFMONTHDATE sy-vline 
WA_PMNTHLYHISTBYDTE_STR-LASTDAYOFMONTHDATE sy-vline 
WA_PMNTHLYHISTBYDTE_STR-CALENDARMONTH sy-vline      INTO ld_text SEPARATED BY SPACE.

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