ABAP Select data from SAP table PSPECVAHDR into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PSPECVAHDR 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 PSPECVAHDR. 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 PSPECVAHDR 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_PSPECVAHDR TYPE STANDARD TABLE OF PSPECVAHDR,
      WA_PSPECVAHDR TYPE PSPECVAHDR,
      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: <PSPECVAHDR> TYPE PSPECVAHDR.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PSPECVAHDR
*  INTO TABLE @DATA(IT_PSPECVAHDR2).
*--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_PSPECVAHDR INDEX 1 INTO DATA(WA_PSPECVAHDR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PSPECVAHDR>-MANDT = 1.
<PSPECVAHDR>-SPECVALASSGMTHDR = 1.
<PSPECVAHDR>-SPECVALASSGMT = 1.
<PSPECVAHDR>-SPECIFICATIONINTERNALID = 1.
<PSPECVAHDR>-SPECVALASSGMTTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PSPECVAHDR-SPECVALASSGMTHDRISDELETED, sy-vline,
  WA_PSPECVAHDR-SPECVALASSGMTCHANGESTATE, sy-vline,
  WA_PSPECVAHDR-SPECVALASSGMTVALIDITYSTARTDATE, sy-vline,
  WA_PSPECVAHDR-SPECVALASSGMTVALIDITYENDDATE, sy-vline,
  WA_PSPECVAHDR-SPECVALASSGMTCHANGENUMBER, sy-vline,
  WA_PSPECVAHDR-SPECVALASSGMTCREATIONDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PSPECVAHDR 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_PSPECVAHDR 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_PSPECVAHDR INTO WA_PSPECVAHDR.


*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 SPECVALASSGMTHDR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PSPECVAHDR-SPECVALASSGMTHDR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSPECVAHDR-SPECVALASSGMTHDR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field SPECVALASSGMTROOTSPECINTID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PSPECVAHDR-SPECVALASSGMTROOTSPECINTID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSPECVAHDR-SPECVALASSGMTROOTSPECINTID.
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_PSPECVAHDR_STR, 
MANDT TYPE STRING,
SPECVALASSGMTHDR TYPE STRING,
SPECVALASSGMT TYPE STRING,
SPECIFICATIONINTERNALID TYPE STRING,
SPECVALASSGMTTYPE TYPE STRING,
SPECVALASSGMTHDRISDELETED TYPE STRING,
SPECVALASSGMTCHANGESTATE TYPE STRING,
SPECVALASSGMTVALIDITYSTARTDATE TYPE STRING,
SPECVALASSGMTVALIDITYENDDATE TYPE STRING,
SPECVALASSGMTCHANGENUMBER TYPE STRING,
SPECVALASSGMTCREATIONDATE TYPE STRING,
SPECVALASSGMTCREATEDBYUSER TYPE STRING,
SPECVALASSGMTLASTCHANGEDATE TYPE STRING,
SPECVALASSGMTLASTCHANGEDBYUSER TYPE STRING,
SPECVALASSGMTSORTSEQUENCE TYPE STRING,
SPECVALASSGMTUNITREFDIMENSION TYPE STRING,
SPECVALASSGMTISINHTNCSOURCE TYPE STRING,
INHTDSPECVALASSGMTISTMPCHGD TYPE STRING,
INHTDSPECVALASSGMTISPERMCHGD TYPE STRING,
SPECINHERITANCETEMPLATE TYPE STRING,
SPECVALASSGMTINHERITANCEPARENT TYPE STRING,
SPECVALASSGMTINHERITANCEROOT TYPE STRING,
SPECVALASSGMTROOTSPECINTID TYPE STRING,
SPECVALASSGMTISDELETED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PSPECVAHDR_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_PSPECVAHDR_STR-MANDT sy-vline 
WA_PSPECVAHDR_STR-SPECVALASSGMTHDR sy-vline 
WA_PSPECVAHDR_STR-SPECVALASSGMT sy-vline 
WA_PSPECVAHDR_STR-SPECIFICATIONINTERNALID sy-vline 
WA_PSPECVAHDR_STR-SPECVALASSGMTTYPE sy-vline 
WA_PSPECVAHDR_STR-SPECVALASSGMTHDRISDELETED sy-vline 
WA_PSPECVAHDR_STR-SPECVALASSGMTCHANGESTATE sy-vline 
WA_PSPECVAHDR_STR-SPECVALASSGMTVALIDITYSTARTDATE sy-vline 
WA_PSPECVAHDR_STR-SPECVALASSGMTVALIDITYENDDATE sy-vline 
WA_PSPECVAHDR_STR-SPECVALASSGMTCHANGENUMBER sy-vline 
WA_PSPECVAHDR_STR-SPECVALASSGMTCREATIONDATE sy-vline 
WA_PSPECVAHDR_STR-SPECVALASSGMTCREATEDBYUSER sy-vline 
WA_PSPECVAHDR_STR-SPECVALASSGMTLASTCHANGEDATE sy-vline 
WA_PSPECVAHDR_STR-SPECVALASSGMTLASTCHANGEDBYUSER sy-vline 
WA_PSPECVAHDR_STR-SPECVALASSGMTSORTSEQUENCE sy-vline 
WA_PSPECVAHDR_STR-SPECVALASSGMTUNITREFDIMENSION sy-vline 
WA_PSPECVAHDR_STR-SPECVALASSGMTISINHTNCSOURCE sy-vline 
WA_PSPECVAHDR_STR-INHTDSPECVALASSGMTISTMPCHGD sy-vline 
WA_PSPECVAHDR_STR-INHTDSPECVALASSGMTISPERMCHGD sy-vline 
WA_PSPECVAHDR_STR-SPECINHERITANCETEMPLATE sy-vline 
WA_PSPECVAHDR_STR-SPECVALASSGMTINHERITANCEPARENT sy-vline 
WA_PSPECVAHDR_STR-SPECVALASSGMTINHERITANCEROOT sy-vline 
WA_PSPECVAHDR_STR-SPECVALASSGMTROOTSPECINTID sy-vline 
WA_PSPECVAHDR_STR-SPECVALASSGMTISDELETED sy-vline      INTO ld_text SEPARATED BY SPACE.

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