ABAP Select data from SAP table PIQPROCS_DH_DISPLAY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQPROCS_DH_DISPLAY
*  INTO TABLE @DATA(IT_PIQPROCS_DH_DISPLAY2).
*--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_PIQPROCS_DH_DISPLAY INDEX 1 INTO DATA(WA_PIQPROCS_DH_DISPLAY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQPROCS_DH_DISPLAY>-DOCID = 1.
<PIQPROCS_DH_DISPLAY>-PROCESS = 1.
<PIQPROCS_DH_DISPLAY>-REASON = 1.
<PIQPROCS_DH_DISPLAY>-KEY_DATE = 1.
<PIQPROCS_DH_DISPLAY>-KEY_TIME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQPROCS_DH_DISPLAY-KEY_TIMEZONE, sy-vline,
  WA_PIQPROCS_DH_DISPLAY-PROCESST, sy-vline,
  WA_PIQPROCS_DH_DISPLAY-REASONTEXT, sy-vline,
  WA_PIQPROCS_DH_DISPLAY-TIMESTAMP, sy-vline,
  WA_PIQPROCS_DH_DISPLAY-TIMESTAMP_DATE, sy-vline,
  WA_PIQPROCS_DH_DISPLAY-TIMESTAMP_TIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQPROCS_DH_DISPLAY 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_PIQPROCS_DH_DISPLAY 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_PIQPROCS_DH_DISPLAY INTO WA_PIQPROCS_DH_DISPLAY.


*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 ALPHA, internal->external for field LOGSYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PIQPROCS_DH_DISPLAY-LOGSYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQPROCS_DH_DISPLAY-LOGSYSTEM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PIQST, internal->external for field STUDENT12
CALL FUNCTION 'CONVERSION_EXIT_PIQST_OUTPUT'
  EXPORTING
    input =                      WA_PIQPROCS_DH_DISPLAY-STUDENT12
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQPROCS_DH_DISPLAY-STUDENT12.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REF_LOGSYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PIQPROCS_DH_DISPLAY-REF_LOGSYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQPROCS_DH_DISPLAY-REF_LOGSYSTEM.
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_PIQPROCS_DH_DISPLAY_STR, 
DOCID TYPE STRING,
PROCESS TYPE STRING,
REASON TYPE STRING,
KEY_DATE TYPE STRING,
KEY_TIME TYPE STRING,
KEY_TIMEZONE TYPE STRING,
PROCESST TYPE STRING,
REASONTEXT TYPE STRING,
TIMESTAMP TYPE STRING,
TIMESTAMP_DATE TYPE STRING,
TIMESTAMP_TIME TYPE STRING,
UNAME TYPE STRING,
LOGSYSTEM TYPE STRING,
CM_RELEASE TYPE STRING,
ARCHIVED TYPE STRING,
PLVAR TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
ST_OBJID TYPE STRING,
SCSRK TYPE STRING,
SCTEXT TYPE STRING,
SMSRK TYPE STRING,
SMTEXT TYPE STRING,
STUDENT12 TYPE STRING,
NAME TYPE STRING,
BEGDA TYPE STRING,
BEGPERYR TYPE STRING,
BEGPERID TYPE STRING,
ENDDA TYPE STRING,
ENDPERYR TYPE STRING,
ENDPERID TYPE STRING,
BEGPERYT TYPE STRING,
BEGPERIT TYPE STRING,
ENDPERYT TYPE STRING,
ENDPERIT TYPE STRING,
REF_DOCID TYPE STRING,
REF_PROCESS TYPE STRING,
REF_LOGSYSTEM TYPE STRING,
REF_PROCESST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQPROCS_DH_DISPLAY_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_PIQPROCS_DH_DISPLAY_STR-DOCID sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-PROCESS sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-REASON sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-KEY_DATE sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-KEY_TIME sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-KEY_TIMEZONE sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-PROCESST sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-REASONTEXT sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-TIMESTAMP sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-TIMESTAMP_DATE sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-TIMESTAMP_TIME sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-UNAME sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-LOGSYSTEM sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-CM_RELEASE sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-ARCHIVED sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-PLVAR sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-OTYPE sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-OBJID sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-ST_OBJID sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-SCSRK sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-SCTEXT sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-SMSRK sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-SMTEXT sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-STUDENT12 sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-NAME sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-BEGDA sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-BEGPERYR sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-BEGPERID sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-ENDDA sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-ENDPERYR sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-ENDPERID sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-BEGPERYT sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-BEGPERIT sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-ENDPERYT sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-ENDPERIT sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-REF_DOCID sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-REF_PROCESS sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-REF_LOGSYSTEM sy-vline 
WA_PIQPROCS_DH_DISPLAY_STR-REF_PROCESST sy-vline      INTO ld_text SEPARATED BY SPACE.

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