ABAP Select data from SAP table PMNTHLYPIRHIST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PMNTHLYPIRHIST
*  INTO TABLE @DATA(IT_PMNTHLYPIRHIST2).
*--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_PMNTHLYPIRHIST INDEX 1 INTO DATA(WA_PMNTHLYPIRHIST2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PMNTHLYPIRHIST-FORECASTYEARMONTH, sy-vline,
  WA_PMNTHLYPIRHIST-LASTCHANGEDATE, sy-vline,
  WA_PMNTHLYPIRHIST-LASTCHANGETIME, sy-vline,
  WA_PMNTHLYPIRHIST-LASTCHANGEDATETIME, sy-vline,
  WA_PMNTHLYPIRHIST-DELIVERYDATE, sy-vline,
  WA_PMNTHLYPIRHIST-FORECASTQUANTITY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PMNTHLYPIRHIST 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_PMNTHLYPIRHIST 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_PMNTHLYPIRHIST INTO WA_PMNTHLYPIRHIST.


*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_PMNTHLYPIRHIST-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PMNTHLYPIRHIST-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_PMNTHLYPIRHIST_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,
DELIVERYDATE TYPE STRING,
FORECASTQUANTITY TYPE STRING,
CALENDARMONTH TYPE STRING,
NUMBEROFDAYS TYPE STRING,
FIRSTDAYOFMONTHDATE TYPE STRING,
LASTDAYOFMONTHDATE TYPE STRING,
CALENDARDATE TYPE STRING,
AVERAGEDAILYUSAGE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PMNTHLYPIRHIST_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_PMNTHLYPIRHIST_STR-MANDT sy-vline 
WA_PMNTHLYPIRHIST_STR-MATERIAL sy-vline 
WA_PMNTHLYPIRHIST_STR-PRODUCTIONPLANT sy-vline 
WA_PMNTHLYPIRHIST_STR-MRPAREA sy-vline 
WA_PMNTHLYPIRHIST_STR-FORECAST sy-vline 
WA_PMNTHLYPIRHIST_STR-FORECASTYEARMONTH sy-vline 
WA_PMNTHLYPIRHIST_STR-LASTCHANGEDATE sy-vline 
WA_PMNTHLYPIRHIST_STR-LASTCHANGETIME sy-vline 
WA_PMNTHLYPIRHIST_STR-LASTCHANGEDATETIME sy-vline 
WA_PMNTHLYPIRHIST_STR-DELIVERYDATE sy-vline 
WA_PMNTHLYPIRHIST_STR-FORECASTQUANTITY sy-vline 
WA_PMNTHLYPIRHIST_STR-CALENDARMONTH sy-vline 
WA_PMNTHLYPIRHIST_STR-NUMBEROFDAYS sy-vline 
WA_PMNTHLYPIRHIST_STR-FIRSTDAYOFMONTHDATE sy-vline 
WA_PMNTHLYPIRHIST_STR-LASTDAYOFMONTHDATE sy-vline 
WA_PMNTHLYPIRHIST_STR-CALENDARDATE sy-vline 
WA_PMNTHLYPIRHIST_STR-AVERAGEDAILYUSAGE sy-vline      INTO ld_text SEPARATED BY SPACE.

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