ABAP Select data from SAP table CATEX 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 CATEX 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 CATEX. 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 CATEX 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_CATEX TYPE STANDARD TABLE OF CATEX,
      WA_CATEX TYPE CATEX,
      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: <CATEX> TYPE CATEX.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CATEX
*  INTO TABLE @DATA(IT_CATEX2).
*--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_CATEX INDEX 1 INTO DATA(WA_CATEX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CATEX>-RULE_ID = 1.
<CATEX>-BUKRS = 1.
<CATEX>-AWART = 1.
<CATEX>-LGART = 1.
<CATEX>-VERSL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CATEX-AUFKZ, sy-vline,
  WA_CATEX-TRFGR, sy-vline,
  WA_CATEX-TRFST, sy-vline,
  WA_CATEX-PRAKN, sy-vline,
  WA_CATEX-PRAKZ, sy-vline,
  WA_CATEX-OTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CATEX 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_CATEX 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_CATEX INTO WA_CATEX.


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

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

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

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

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

*Conversion exit ABPSN, internal->external for field POSID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_CATEX-POSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CATEX-POSID.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field S_GRANT_NBR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CATEX-S_GRANT_NBR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CATEX-S_GRANT_NBR.
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_CATEX_STR, 
RULE_ID TYPE STRING,
BUKRS TYPE STRING,
AWART TYPE STRING,
LGART TYPE STRING,
VERSL TYPE STRING,
AUFKZ TYPE STRING,
TRFGR TYPE STRING,
TRFST TYPE STRING,
PRAKN TYPE STRING,
PRAKZ TYPE STRING,
OTYPE TYPE STRING,
PLANS TYPE STRING,
TASKTYPE TYPE STRING,
TASKLEVEL TYPE STRING,
TASKCOMPONENT TYPE STRING,
KOKRS TYPE STRING,
ARBPL TYPE STRING,
WERKS TYPE STRING,
SKOSTL TYPE STRING,
LSTAR TYPE STRING,
SEBELN TYPE STRING,
SEBELP TYPE STRING,
SPRZNR TYPE STRING,
LSTNR TYPE STRING,
RKOSTL TYPE STRING,
POSID TYPE STRING,
RAUFNR TYPE STRING,
RNPLNR TYPE STRING,
VORNR TYPE STRING,
UVORN TYPE STRING,
RKDAUF TYPE STRING,
RKDPOS TYPE STRING,
RKSTR TYPE STRING,
RPRZNR TYPE STRING,
STATKEYFIG TYPE STRING,
FUND TYPE STRING,
FUNC_AREA TYPE STRING,
GRANT_NBR TYPE STRING,
S_FUND TYPE STRING,
S_FUNC_AREA TYPE STRING,
S_GRANT_NBR TYPE STRING,
CPR_EXTID TYPE STRING,
CPR_OBJGEXTID TYPE STRING,
CPR_OBJTYPE TYPE STRING,
BUDGET_PD TYPE STRING,
SBUDGET_PD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CATEX_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_CATEX_STR-RULE_ID sy-vline 
WA_CATEX_STR-BUKRS sy-vline 
WA_CATEX_STR-AWART sy-vline 
WA_CATEX_STR-LGART sy-vline 
WA_CATEX_STR-VERSL sy-vline 
WA_CATEX_STR-AUFKZ sy-vline 
WA_CATEX_STR-TRFGR sy-vline 
WA_CATEX_STR-TRFST sy-vline 
WA_CATEX_STR-PRAKN sy-vline 
WA_CATEX_STR-PRAKZ sy-vline 
WA_CATEX_STR-OTYPE sy-vline 
WA_CATEX_STR-PLANS sy-vline 
WA_CATEX_STR-TASKTYPE sy-vline 
WA_CATEX_STR-TASKLEVEL sy-vline 
WA_CATEX_STR-TASKCOMPONENT sy-vline 
WA_CATEX_STR-KOKRS sy-vline 
WA_CATEX_STR-ARBPL sy-vline 
WA_CATEX_STR-WERKS sy-vline 
WA_CATEX_STR-SKOSTL sy-vline 
WA_CATEX_STR-LSTAR sy-vline 
WA_CATEX_STR-SEBELN sy-vline 
WA_CATEX_STR-SEBELP sy-vline 
WA_CATEX_STR-SPRZNR sy-vline 
WA_CATEX_STR-LSTNR sy-vline 
WA_CATEX_STR-RKOSTL sy-vline 
WA_CATEX_STR-POSID sy-vline 
WA_CATEX_STR-RAUFNR sy-vline 
WA_CATEX_STR-RNPLNR sy-vline 
WA_CATEX_STR-VORNR sy-vline 
WA_CATEX_STR-UVORN sy-vline 
WA_CATEX_STR-RKDAUF sy-vline 
WA_CATEX_STR-RKDPOS sy-vline 
WA_CATEX_STR-RKSTR sy-vline 
WA_CATEX_STR-RPRZNR sy-vline 
WA_CATEX_STR-STATKEYFIG sy-vline 
WA_CATEX_STR-FUND sy-vline 
WA_CATEX_STR-FUNC_AREA sy-vline 
WA_CATEX_STR-GRANT_NBR sy-vline 
WA_CATEX_STR-S_FUND sy-vline 
WA_CATEX_STR-S_FUNC_AREA sy-vline 
WA_CATEX_STR-S_GRANT_NBR sy-vline 
WA_CATEX_STR-CPR_EXTID sy-vline 
WA_CATEX_STR-CPR_OBJGEXTID sy-vline 
WA_CATEX_STR-CPR_OBJTYPE sy-vline 
WA_CATEX_STR-BUDGET_PD sy-vline 
WA_CATEX_STR-SBUDGET_PD sy-vline      INTO ld_text SEPARATED BY SPACE.

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