ABAP Select data from SAP table P1022_TAB into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P1022_TAB 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 P1022_TAB. 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 P1022_TAB 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_P1022_TAB TYPE STANDARD TABLE OF P1022_TAB,
      WA_P1022_TAB TYPE P1022_TAB,
      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: <P1022_TAB> TYPE P1022_TAB.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P1022_TAB.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P1022_TAB
  INTO TABLE IT_P1022_TAB.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P1022_TAB
*  INTO TABLE @DATA(IT_P1022_TAB2).
*--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_P1022_TAB INDEX 1 INTO DATA(WA_P1022_TAB2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P1022_TAB ASSIGNING <P1022_TAB>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P1022_TAB>-MANDT = 1.
<P1022_TAB>-PLVAR = 1.
<P1022_TAB>-OTYPE = 1.
<P1022_TAB>-OBJID = 1.
<P1022_TAB>-INFTY = 1.

ENDLOOP.

LOOP AT IT_P1022_TAB INTO WA_P1022_TAB.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P1022_TAB-SUBTY, sy-vline,
  WA_P1022_TAB-ISTAT, sy-vline,
  WA_P1022_TAB-PRIOX, sy-vline,
  WA_P1022_TAB-BEGDA, sy-vline,
  WA_P1022_TAB-ENDDA, sy-vline,
  WA_P1022_TAB-VARYF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P1022_TAB 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_P1022_TAB 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_P1022_TAB INTO WA_P1022_TAB.


*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_P1022_TAB_STR, 
MANDT TYPE STRING,
PLVAR TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
INFTY TYPE STRING,
SUBTY TYPE STRING,
ISTAT TYPE STRING,
PRIOX TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
VARYF TYPE STRING,
SEQNR TYPE STRING,
AEDTM TYPE STRING,
UNAME TYPE STRING,
REASN TYPE STRING,
HISTO TYPE STRING,
ITXNR TYPE STRING,
ACLAS TYPE STRING,
AMUST TYPE STRING,
REFAK TYPE STRING,
BGDAY TYPE STRING,
RDAY1 TYPE STRING,
RDAY2 TYPE STRING,
RDAY3 TYPE STRING,
RDAY4 TYPE STRING,
RDAYL TYPE STRING,
REFRQ TYPE STRING,
NDAYS TYPE STRING,
NHOURS TYPE STRING,
TAGNR_001 TYPE STRING,
ZBLID_001 TYPE STRING,
TAGNR_002 TYPE STRING,
ZBLID_002 TYPE STRING,
TAGNR_003 TYPE STRING,
ZBLID_003 TYPE STRING,
TAGNR_004 TYPE STRING,
ZBLID_004 TYPE STRING,
TAGNR_005 TYPE STRING,
ZBLID_005 TYPE STRING,
TAGNR_006 TYPE STRING,
ZBLID_006 TYPE STRING,
TAGNR_007 TYPE STRING,
ZBLID_007 TYPE STRING,
TAGNR_008 TYPE STRING,
ZBLID_008 TYPE STRING,
TAGNR_009 TYPE STRING,
ZBLID_009 TYPE STRING,
TAGNR_010 TYPE STRING,
ZBLID_010 TYPE STRING,
TAGNR_011 TYPE STRING,
ZBLID_011 TYPE STRING,
TAGNR_012 TYPE STRING,
ZBLID_012 TYPE STRING,
MAXDAYS TYPE STRING,
SELKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P1022_TAB_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_P1022_TAB_STR-MANDT sy-vline 
WA_P1022_TAB_STR-PLVAR sy-vline 
WA_P1022_TAB_STR-OTYPE sy-vline 
WA_P1022_TAB_STR-OBJID sy-vline 
WA_P1022_TAB_STR-INFTY sy-vline 
WA_P1022_TAB_STR-SUBTY sy-vline 
WA_P1022_TAB_STR-ISTAT sy-vline 
WA_P1022_TAB_STR-PRIOX sy-vline 
WA_P1022_TAB_STR-BEGDA sy-vline 
WA_P1022_TAB_STR-ENDDA sy-vline 
WA_P1022_TAB_STR-VARYF sy-vline 
WA_P1022_TAB_STR-SEQNR sy-vline 
WA_P1022_TAB_STR-AEDTM sy-vline 
WA_P1022_TAB_STR-UNAME sy-vline 
WA_P1022_TAB_STR-REASN sy-vline 
WA_P1022_TAB_STR-HISTO sy-vline 
WA_P1022_TAB_STR-ITXNR sy-vline 
WA_P1022_TAB_STR-ACLAS sy-vline 
WA_P1022_TAB_STR-AMUST sy-vline 
WA_P1022_TAB_STR-REFAK sy-vline 
WA_P1022_TAB_STR-BGDAY sy-vline 
WA_P1022_TAB_STR-RDAY1 sy-vline 
WA_P1022_TAB_STR-RDAY2 sy-vline 
WA_P1022_TAB_STR-RDAY3 sy-vline 
WA_P1022_TAB_STR-RDAY4 sy-vline 
WA_P1022_TAB_STR-RDAYL sy-vline 
WA_P1022_TAB_STR-REFRQ sy-vline 
WA_P1022_TAB_STR-NDAYS sy-vline 
WA_P1022_TAB_STR-NHOURS sy-vline 
WA_P1022_TAB_STR-TAGNR_001 sy-vline 
WA_P1022_TAB_STR-ZBLID_001 sy-vline 
WA_P1022_TAB_STR-TAGNR_002 sy-vline 
WA_P1022_TAB_STR-ZBLID_002 sy-vline 
WA_P1022_TAB_STR-TAGNR_003 sy-vline 
WA_P1022_TAB_STR-ZBLID_003 sy-vline 
WA_P1022_TAB_STR-TAGNR_004 sy-vline 
WA_P1022_TAB_STR-ZBLID_004 sy-vline 
WA_P1022_TAB_STR-TAGNR_005 sy-vline 
WA_P1022_TAB_STR-ZBLID_005 sy-vline 
WA_P1022_TAB_STR-TAGNR_006 sy-vline 
WA_P1022_TAB_STR-ZBLID_006 sy-vline 
WA_P1022_TAB_STR-TAGNR_007 sy-vline 
WA_P1022_TAB_STR-ZBLID_007 sy-vline 
WA_P1022_TAB_STR-TAGNR_008 sy-vline 
WA_P1022_TAB_STR-ZBLID_008 sy-vline 
WA_P1022_TAB_STR-TAGNR_009 sy-vline 
WA_P1022_TAB_STR-ZBLID_009 sy-vline 
WA_P1022_TAB_STR-TAGNR_010 sy-vline 
WA_P1022_TAB_STR-ZBLID_010 sy-vline 
WA_P1022_TAB_STR-TAGNR_011 sy-vline 
WA_P1022_TAB_STR-ZBLID_011 sy-vline 
WA_P1022_TAB_STR-TAGNR_012 sy-vline 
WA_P1022_TAB_STR-ZBLID_012 sy-vline 
WA_P1022_TAB_STR-MAXDAYS sy-vline 
WA_P1022_TAB_STR-SELKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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