ABAP Select data from SAP table WCAAP 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 WCAAP 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 WCAAP. 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 WCAAP 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_WCAAP TYPE STANDARD TABLE OF WCAAP,
      WA_WCAAP TYPE WCAAP,
      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: <WCAAP> TYPE WCAAP.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WCAAP
*  INTO TABLE @DATA(IT_WCAAP2).
*--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_WCAAP INDEX 1 INTO DATA(WA_WCAAP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WCAAP>-MANDT = 1.
<WCAAP>-WAPINR = 1.
<WCAAP>-OBJNR = 1.
<WCAAP>-WAPITYP = 1.
<WCAAP>-WAPIUSE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WCAAP-STXT, sy-vline,
  WA_WCAAP-LFLG, sy-vline,
  WA_WCAAP-DELFLG, sy-vline,
  WA_WCAAP-REQUALFLG, sy-vline,
  WA_WCAAP-CATFLG1, sy-vline,
  WA_WCAAP-CATFLG2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WCAAP 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_WCAAP 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_WCAAP INTO WA_WCAAP.


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

*Conversion exit CUNIT, internal->external for field RCUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WCAAP-RCUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCAAP-RCUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TPLNR, internal->external for field TPLNR
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_WCAAP-TPLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCAAP-TPLNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ABPSP, internal->external for field PSPEL
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_WCAAP-PSPEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCAAP-PSPEL.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_WCAAP-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCAAP-VORNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ZP_WAPINR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WCAAP-ZP_WAPINR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCAAP-ZP_WAPINR.
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_WCAAP_STR, 
MANDT TYPE STRING,
WAPINR TYPE STRING,
OBJNR TYPE STRING,
WAPITYP TYPE STRING,
WAPIUSE TYPE STRING,
STXT TYPE STRING,
LFLG TYPE STRING,
DELFLG TYPE STRING,
REQUALFLG TYPE STRING,
CATFLG1 TYPE STRING,
CATFLG2 TYPE STRING,
INGRP TYPE STRING,
IWERK TYPE STRING,
WKCRTYP TYPE STRING,
WKCRID TYPE STRING,
BEGRU TYPE STRING,
DATEFR TYPE STRING,
TIMEFR TYPE STRING,
DATETO TYPE STRING,
TIMETO TYPE STRING,
EXTPERIOD TYPE STRING,
ANLZU TYPE STRING,
RCTIME TYPE STRING,
RCUNIT TYPE STRING,
PRIOK TYPE STRING,
TPLNR TYPE STRING,
EQUNR TYPE STRING,
LNKFLG TYPE STRING,
TRAIN TYPE STRING,
CRNAME TYPE STRING,
CRDATE TYPE STRING,
CRTIME TYPE STRING,
CHNAME TYPE STRING,
CHDATE TYPE STRING,
CHTIME TYPE STRING,
PSPEL TYPE STRING,
AUFNT TYPE STRING,
VORNR TYPE STRING,
BDATE TYPE STRING,
BTIME TYPE STRING,
EDATE TYPE STRING,
ETIME TYPE STRING,
TSDATE TYPE STRING,
TSTIME TYPE STRING,
TFDATE TYPE STRING,
TFTIME TYPE STRING,
ESDATE TYPE STRING,
ESTIME TYPE STRING,
EFDATE TYPE STRING,
EFTIME TYPE STRING,
LSDATE TYPE STRING,
LSTIME TYPE STRING,
LFDATE TYPE STRING,
LFTIME TYPE STRING,
PSDATE TYPE STRING,
PSTIME TYPE STRING,
PFDATE TYPE STRING,
PFTIME TYPE STRING,
ASDATE TYPE STRING,
ASTIME TYPE STRING,
AFDATE TYPE STRING,
AFTIME TYPE STRING,
ETAPE TYPE STRING,
DOCFLG TYPE STRING,
WAPISTSMA TYPE STRING,
REFOBJ TYPE STRING,
REMARKFLG1 TYPE STRING,
REMARKFLG2 TYPE STRING,
IDATE TYPE STRING,
ITIME TYPE STRING,
RDATE TYPE STRING,
RTIME TYPE STRING,
PDATES TYPE STRING,
PTIMES TYPE STRING,
PDATEE TYPE STRING,
PTIMEE TYPE STRING,
CDATE TYPE STRING,
CTIME TYPE STRING,
PLDATES TYPE STRING,
PLTIMES TYPE STRING,
PLDATEE TYPE STRING,
PLTIMEE TYPE STRING,
POWER_OFF TYPE STRING,
NEWRESP TYPE STRING,
ISSUEDBY TYPE STRING,
RCHGDATE TYPE STRING,
RCHGTIME TYPE STRING,
PTDATE TYPE STRING,
PTTIME TYPE STRING,
EXTRESP TYPE STRING,
PERRESP TYPE STRING,
PRESP TYPE STRING,
PRDATE TYPE STRING,
PREDATE TYPE STRING,
PRTIME TYPE STRING,
PRETIME TYPE STRING,
EXTRTIME TYPE STRING,
EXTRDATE TYPE STRING,
SHTCHF TYPE STRING,
SHCDATE TYPE STRING,
SHCTIME TYPE STRING,
SHIFT TYPE STRING,
PERSONNEL_NO TYPE STRING,
NUM TYPE STRING,
TTS_FLAG TYPE STRING,
THERM_APPR1 TYPE STRING,
THERM_EXEC1 TYPE STRING,
THERM_EXEC2 TYPE STRING,
THERM_EXEC3 TYPE STRING,
THERM_STDATE TYPE STRING,
THERM_STTIME TYPE STRING,
THERM_OP_SPRV TYPE STRING,
THERM_WORK_RESP TYPE STRING,
THERM_WORK_PERRESP TYPE STRING,
PLANT_SIGN_WT7 TYPE STRING,
SECU_SIGN_WT7 TYPE STRING,
FIRE_SIGN_WT7 TYPE STRING,
FIRE_MSR_WT7 TYPE STRING,
PLANT_BGN_WT7 TYPE STRING,
SECU_BGN_WT7 TYPE STRING,
FIRE_BGN_WT7 TYPE STRING,
EXEC_BGN_WT7 TYPE STRING,
FIRE_END_WT7 TYPE STRING,
EXEC_END_WT7 TYPE STRING,
LOC_MSR_WT7 TYPE STRING,
EQUIP_MSR_WT7 TYPE STRING,
ITEM_MSR_WT7 TYPE STRING,
ZP_WAPINR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WCAAP_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_WCAAP_STR-MANDT sy-vline 
WA_WCAAP_STR-WAPINR sy-vline 
WA_WCAAP_STR-OBJNR sy-vline 
WA_WCAAP_STR-WAPITYP sy-vline 
WA_WCAAP_STR-WAPIUSE sy-vline 
WA_WCAAP_STR-STXT sy-vline 
WA_WCAAP_STR-LFLG sy-vline 
WA_WCAAP_STR-DELFLG sy-vline 
WA_WCAAP_STR-REQUALFLG sy-vline 
WA_WCAAP_STR-CATFLG1 sy-vline 
WA_WCAAP_STR-CATFLG2 sy-vline 
WA_WCAAP_STR-INGRP sy-vline 
WA_WCAAP_STR-IWERK sy-vline 
WA_WCAAP_STR-WKCRTYP sy-vline 
WA_WCAAP_STR-WKCRID sy-vline 
WA_WCAAP_STR-BEGRU sy-vline 
WA_WCAAP_STR-DATEFR sy-vline 
WA_WCAAP_STR-TIMEFR sy-vline 
WA_WCAAP_STR-DATETO sy-vline 
WA_WCAAP_STR-TIMETO sy-vline 
WA_WCAAP_STR-EXTPERIOD sy-vline 
WA_WCAAP_STR-ANLZU sy-vline 
WA_WCAAP_STR-RCTIME sy-vline 
WA_WCAAP_STR-RCUNIT sy-vline 
WA_WCAAP_STR-PRIOK sy-vline 
WA_WCAAP_STR-TPLNR sy-vline 
WA_WCAAP_STR-EQUNR sy-vline 
WA_WCAAP_STR-LNKFLG sy-vline 
WA_WCAAP_STR-TRAIN sy-vline 
WA_WCAAP_STR-CRNAME sy-vline 
WA_WCAAP_STR-CRDATE sy-vline 
WA_WCAAP_STR-CRTIME sy-vline 
WA_WCAAP_STR-CHNAME sy-vline 
WA_WCAAP_STR-CHDATE sy-vline 
WA_WCAAP_STR-CHTIME sy-vline 
WA_WCAAP_STR-PSPEL sy-vline 
WA_WCAAP_STR-AUFNT sy-vline 
WA_WCAAP_STR-VORNR sy-vline 
WA_WCAAP_STR-BDATE sy-vline 
WA_WCAAP_STR-BTIME sy-vline 
WA_WCAAP_STR-EDATE sy-vline 
WA_WCAAP_STR-ETIME sy-vline 
WA_WCAAP_STR-TSDATE sy-vline 
WA_WCAAP_STR-TSTIME sy-vline 
WA_WCAAP_STR-TFDATE sy-vline 
WA_WCAAP_STR-TFTIME sy-vline 
WA_WCAAP_STR-ESDATE sy-vline 
WA_WCAAP_STR-ESTIME sy-vline 
WA_WCAAP_STR-EFDATE sy-vline 
WA_WCAAP_STR-EFTIME sy-vline 
WA_WCAAP_STR-LSDATE sy-vline 
WA_WCAAP_STR-LSTIME sy-vline 
WA_WCAAP_STR-LFDATE sy-vline 
WA_WCAAP_STR-LFTIME sy-vline 
WA_WCAAP_STR-PSDATE sy-vline 
WA_WCAAP_STR-PSTIME sy-vline 
WA_WCAAP_STR-PFDATE sy-vline 
WA_WCAAP_STR-PFTIME sy-vline 
WA_WCAAP_STR-ASDATE sy-vline 
WA_WCAAP_STR-ASTIME sy-vline 
WA_WCAAP_STR-AFDATE sy-vline 
WA_WCAAP_STR-AFTIME sy-vline 
WA_WCAAP_STR-ETAPE sy-vline 
WA_WCAAP_STR-DOCFLG sy-vline 
WA_WCAAP_STR-WAPISTSMA sy-vline 
WA_WCAAP_STR-REFOBJ sy-vline 
WA_WCAAP_STR-REMARKFLG1 sy-vline 
WA_WCAAP_STR-REMARKFLG2 sy-vline 
WA_WCAAP_STR-IDATE sy-vline 
WA_WCAAP_STR-ITIME sy-vline 
WA_WCAAP_STR-RDATE sy-vline 
WA_WCAAP_STR-RTIME sy-vline 
WA_WCAAP_STR-PDATES sy-vline 
WA_WCAAP_STR-PTIMES sy-vline 
WA_WCAAP_STR-PDATEE sy-vline 
WA_WCAAP_STR-PTIMEE sy-vline 
WA_WCAAP_STR-CDATE sy-vline 
WA_WCAAP_STR-CTIME sy-vline 
WA_WCAAP_STR-PLDATES sy-vline 
WA_WCAAP_STR-PLTIMES sy-vline 
WA_WCAAP_STR-PLDATEE sy-vline 
WA_WCAAP_STR-PLTIMEE sy-vline 
WA_WCAAP_STR-POWER_OFF sy-vline 
WA_WCAAP_STR-NEWRESP sy-vline 
WA_WCAAP_STR-ISSUEDBY sy-vline 
WA_WCAAP_STR-RCHGDATE sy-vline 
WA_WCAAP_STR-RCHGTIME sy-vline 
WA_WCAAP_STR-PTDATE sy-vline 
WA_WCAAP_STR-PTTIME sy-vline 
WA_WCAAP_STR-EXTRESP sy-vline 
WA_WCAAP_STR-PERRESP sy-vline 
WA_WCAAP_STR-PRESP sy-vline 
WA_WCAAP_STR-PRDATE sy-vline 
WA_WCAAP_STR-PREDATE sy-vline 
WA_WCAAP_STR-PRTIME sy-vline 
WA_WCAAP_STR-PRETIME sy-vline 
WA_WCAAP_STR-EXTRTIME sy-vline 
WA_WCAAP_STR-EXTRDATE sy-vline 
WA_WCAAP_STR-SHTCHF sy-vline 
WA_WCAAP_STR-SHCDATE sy-vline 
WA_WCAAP_STR-SHCTIME sy-vline 
WA_WCAAP_STR-SHIFT sy-vline 
WA_WCAAP_STR-PERSONNEL_NO sy-vline 
WA_WCAAP_STR-NUM sy-vline 
WA_WCAAP_STR-TTS_FLAG sy-vline 
WA_WCAAP_STR-THERM_APPR1 sy-vline 
WA_WCAAP_STR-THERM_EXEC1 sy-vline 
WA_WCAAP_STR-THERM_EXEC2 sy-vline 
WA_WCAAP_STR-THERM_EXEC3 sy-vline 
WA_WCAAP_STR-THERM_STDATE sy-vline 
WA_WCAAP_STR-THERM_STTIME sy-vline 
WA_WCAAP_STR-THERM_OP_SPRV sy-vline 
WA_WCAAP_STR-THERM_WORK_RESP sy-vline 
WA_WCAAP_STR-THERM_WORK_PERRESP sy-vline 
WA_WCAAP_STR-PLANT_SIGN_WT7 sy-vline 
WA_WCAAP_STR-SECU_SIGN_WT7 sy-vline 
WA_WCAAP_STR-FIRE_SIGN_WT7 sy-vline 
WA_WCAAP_STR-FIRE_MSR_WT7 sy-vline 
WA_WCAAP_STR-PLANT_BGN_WT7 sy-vline 
WA_WCAAP_STR-SECU_BGN_WT7 sy-vline 
WA_WCAAP_STR-FIRE_BGN_WT7 sy-vline 
WA_WCAAP_STR-EXEC_BGN_WT7 sy-vline 
WA_WCAAP_STR-FIRE_END_WT7 sy-vline 
WA_WCAAP_STR-EXEC_END_WT7 sy-vline 
WA_WCAAP_STR-LOC_MSR_WT7 sy-vline 
WA_WCAAP_STR-EQUIP_MSR_WT7 sy-vline 
WA_WCAAP_STR-ITEM_MSR_WT7 sy-vline 
WA_WCAAP_STR-ZP_WAPINR sy-vline      INTO ld_text SEPARATED BY SPACE.

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