ABAP Select data from SAP table CTIH_01 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CTIH_01 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 CTIH_01. 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 CTIH_01 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_CTIH_01 TYPE STANDARD TABLE OF CTIH_01,
      WA_CTIH_01 TYPE CTIH_01,
      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: <CTIH_01> TYPE CTIH_01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CTIH_01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CTIH_01
  INTO TABLE IT_CTIH_01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CTIH_01
*  INTO TABLE @DATA(IT_CTIH_012).
*--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_CTIH_01 INDEX 1 INTO DATA(WA_CTIH_012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CTIH_01 ASSIGNING <CTIH_01>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CTIH_01>-ATWRT = 1.
<CTIH_01>-ATFLV = 1.
<CTIH_01>-ATFLB = 1.
<CTIH_01>-ATCOD = 1.
<CTIH_01>-STATU = 1.

ENDLOOP.

LOOP AT IT_CTIH_01 INTO WA_CTIH_01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CTIH_01-ATAWE, sy-vline,
  WA_CTIH_01-ATAW1, sy-vline,
  WA_CTIH_01-ATTLV, sy-vline,
  WA_CTIH_01-ATTLB, sy-vline,
  WA_CTIH_01-ATPRZ, sy-vline,
  WA_CTIH_01-ATINC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CTIH_01 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_CTIH_01 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_CTIH_01 INTO WA_CTIH_01.


*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 CUNIT, internal->external for field ATAWE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CTIH_01-ATAWE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CTIH_01-ATAWE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ATAW1
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CTIH_01-ATAW1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CTIH_01-ATAW1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CTIH_01-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CTIH_01-DOKNR.
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_CTIH_01_STR, 
ATWRT TYPE STRING,
ATFLV TYPE STRING,
ATFLB TYPE STRING,
ATCOD TYPE STRING,
STATU TYPE STRING,
ATAWE TYPE STRING,
ATAW1 TYPE STRING,
ATTLV TYPE STRING,
ATTLB TYPE STRING,
ATPRZ TYPE STRING,
ATINC TYPE STRING,
ATZHL TYPE STRING,
WTZHL TYPE STRING,
KNOBJ TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
ATSTD TYPE STRING,
ATZHH TYPE STRING,
ATWHI TYPE STRING,
TXTNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CTIH_01_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_CTIH_01_STR-ATWRT sy-vline 
WA_CTIH_01_STR-ATFLV sy-vline 
WA_CTIH_01_STR-ATFLB sy-vline 
WA_CTIH_01_STR-ATCOD sy-vline 
WA_CTIH_01_STR-STATU sy-vline 
WA_CTIH_01_STR-ATAWE sy-vline 
WA_CTIH_01_STR-ATAW1 sy-vline 
WA_CTIH_01_STR-ATTLV sy-vline 
WA_CTIH_01_STR-ATTLB sy-vline 
WA_CTIH_01_STR-ATPRZ sy-vline 
WA_CTIH_01_STR-ATINC sy-vline 
WA_CTIH_01_STR-ATZHL sy-vline 
WA_CTIH_01_STR-WTZHL sy-vline 
WA_CTIH_01_STR-KNOBJ sy-vline 
WA_CTIH_01_STR-DOKAR sy-vline 
WA_CTIH_01_STR-DOKNR sy-vline 
WA_CTIH_01_STR-DOKVR sy-vline 
WA_CTIH_01_STR-DOKTL sy-vline 
WA_CTIH_01_STR-ATSTD sy-vline 
WA_CTIH_01_STR-ATZHH sy-vline 
WA_CTIH_01_STR-ATWHI sy-vline 
WA_CTIH_01_STR-TXTNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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