ABAP Select data from SAP table PTRV_WEB_PERIO_DATA_PS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PTRV_WEB_PERIO_DATA_PS
*  INTO TABLE @DATA(IT_PTRV_WEB_PERIO_DATA_PS2).
*--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_PTRV_WEB_PERIO_DATA_PS INDEX 1 INTO DATA(WA_PTRV_WEB_PERIO_DATA_PS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PTRV_WEB_PERIO_DATA_PS>-MANDT = 1.
<PTRV_WEB_PERIO_DATA_PS>-PERNR = 1.
<PTRV_WEB_PERIO_DATA_PS>-REINR = 1.
<PTRV_WEB_PERIO_DATA_PS>-PERIO = 1.
<PTRV_WEB_PERIO_DATA_PS>-PDVRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PTRV_WEB_PERIO_DATA_PS-ST_TAX_PD, sy-vline,
  WA_PTRV_WEB_PERIO_DATA_PS-ST_TAX_ALL, sy-vline,
  WA_PTRV_WEB_PERIO_DATA_PS-DAT_REDUC1, sy-vline,
  WA_PTRV_WEB_PERIO_DATA_PS-DAT_REDUC2, sy-vline,
  WA_PTRV_WEB_PERIO_DATA_PS-DATECOW, sy-vline,
  WA_PTRV_WEB_PERIO_DATA_PS-TIMECOW, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PTRV_WEB_PERIO_DATA_PS 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_PTRV_WEB_PERIO_DATA_PS 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_PTRV_WEB_PERIO_DATA_PS INTO WA_PTRV_WEB_PERIO_DATA_PS.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_PTRV_WEB_PERIO_DATA_PS_STR, 
MANDT TYPE STRING,
PERNR TYPE STRING,
REINR TYPE STRING,
PERIO TYPE STRING,
PDVRS TYPE STRING,
ST_TAX_PD TYPE STRING,
ST_TAX_ALL TYPE STRING,
DAT_REDUC1 TYPE STRING,
DAT_REDUC2 TYPE STRING,
DATECOW TYPE STRING,
TIMECOW TYPE STRING,
DATEEOW TYPE STRING,
TIMEEOW TYPE STRING,
ASSO_SU_SEP_ALLO TYPE STRING,
SA_TAX_TYP TYPE STRING,
SA_TAX_HOUSING TYPE STRING,
DR_NO_O_A_R_TRIP TYPE STRING,
DR_NO_O_O_R_TRIP TYPE STRING,
DR_DIST_TO_WORKP TYPE STRING,
OC_NO_O_A_R_TRIP_B_MOVE TYPE STRING,
OC_NO_O_O_R_TRIP_B_MOVE TYPE STRING,
OC_DIST_TO_WORKP_B_MOVE TYPE STRING,
OC_KM_RATE_WORKP_B_MOVE TYPE STRING,
OC_NO_O_A_R_TRIP_A_MOVE TYPE STRING,
OC_NO_O_O_R_TRIP_A_MOVE TYPE STRING,
OC_DIST_TO_WORKP_A_MOVE TYPE STRING,
OC_KM_RATE_WORKP_A_MOVE TYPE STRING,
GRAT_MEALS_PER_MONTH TYPE STRING,
GRAT_ACCMM_PER_MONTH TYPE STRING,
REIMB_GRP_DEDUCTN_PD TYPE STRING,
PERM_TRIP_APPR TYPE STRING,
GWE TYPE STRING,
EDI TYPE STRING,
CARRY_OTH TYPE STRING,
CARRIED_BY_OTH TYPE STRING,
INCR_MAX_TRIPSEG_REIMB TYPE STRING,
NO_REIMB TYPE STRING,
PER_DIEM_DEDUC_INTL TYPE STRING,
SHORT_DIST TYPE STRING,
THIRD_PARTY_PAYM TYPE STRING,
SEP_ALLO_ANTR_RUECK TYPE STRING,
PER_DIEM_DEDUC_ACC TYPE STRING,
EXCL_PERIOD_EXC TYPE STRING,
DURATION_TRIP_BREAKS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PTRV_WEB_PERIO_DATA_PS_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_PTRV_WEB_PERIO_DATA_PS_STR-MANDT sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-PERNR sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-REINR sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-PERIO sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-PDVRS sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-ST_TAX_PD sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-ST_TAX_ALL sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-DAT_REDUC1 sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-DAT_REDUC2 sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-DATECOW sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-TIMECOW sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-DATEEOW sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-TIMEEOW sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-ASSO_SU_SEP_ALLO sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-SA_TAX_TYP sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-SA_TAX_HOUSING sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-DR_NO_O_A_R_TRIP sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-DR_NO_O_O_R_TRIP sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-DR_DIST_TO_WORKP sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-OC_NO_O_A_R_TRIP_B_MOVE sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-OC_NO_O_O_R_TRIP_B_MOVE sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-OC_DIST_TO_WORKP_B_MOVE sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-OC_KM_RATE_WORKP_B_MOVE sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-OC_NO_O_A_R_TRIP_A_MOVE sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-OC_NO_O_O_R_TRIP_A_MOVE sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-OC_DIST_TO_WORKP_A_MOVE sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-OC_KM_RATE_WORKP_A_MOVE sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-GRAT_MEALS_PER_MONTH sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-GRAT_ACCMM_PER_MONTH sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-REIMB_GRP_DEDUCTN_PD sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-PERM_TRIP_APPR sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-GWE sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-EDI sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-CARRY_OTH sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-CARRIED_BY_OTH sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-INCR_MAX_TRIPSEG_REIMB sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-NO_REIMB sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-PER_DIEM_DEDUC_INTL sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-SHORT_DIST sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-THIRD_PARTY_PAYM sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-SEP_ALLO_ANTR_RUECK sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-PER_DIEM_DEDUC_ACC sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-EXCL_PERIOD_EXC sy-vline 
WA_PTRV_WEB_PERIO_DATA_PS_STR-DURATION_TRIP_BREAKS sy-vline      INTO ld_text SEPARATED BY SPACE.

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