ABAP Select data from SAP table YHITEC_DOCDT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM YHITEC_DOCDT
*  INTO TABLE @DATA(IT_YHITEC_DOCDT2).
*--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_YHITEC_DOCDT INDEX 1 INTO DATA(WA_YHITEC_DOCDT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<YHITEC_DOCDT>-MANDT = 1.
<YHITEC_DOCDT>-POST_YEAR = 1.
<YHITEC_DOCDT>-DOC_ID = 1.
<YHITEC_DOCDT>-REMUN_POS = 1.
<YHITEC_DOCDT>-DETAIL_POS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_YHITEC_DOCDT-FLG_REVERSED, sy-vline,
  WA_YHITEC_DOCDT-STATUS_POS, sy-vline,
  WA_YHITEC_DOCDT-STATUS_WORK, sy-vline,
  WA_YHITEC_DOCDT-PROC_STEP, sy-vline,
  WA_YHITEC_DOCDT-RESULTTYPE, sy-vline,
  WA_YHITEC_DOCDT-RULE_TYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_YHITEC_DOCDT 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_YHITEC_DOCDT 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_YHITEC_DOCDT INTO WA_YHITEC_DOCDT.


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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field UPD_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_YHITEC_DOCDT-UPD_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_YHITEC_DOCDT-UPD_ID.
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_YHITEC_DOCDT_STR, 
MANDT TYPE STRING,
POST_YEAR TYPE STRING,
DOC_ID TYPE STRING,
REMUN_POS TYPE STRING,
DETAIL_POS TYPE STRING,
FLG_REVERSED TYPE STRING,
STATUS_POS TYPE STRING,
STATUS_WORK TYPE STRING,
PROC_STEP TYPE STRING,
RESULTTYPE TYPE STRING,
RULE_TYPE TYPE STRING,
RULE_ID TYPE STRING,
REF_POST_YEAR TYPE STRING,
REF_DOC_ID TYPE STRING,
REF_REMUN_POS TYPE STRING,
REF_DETAIL_POS TYPE STRING,
DREM_SHARE TYPE STRING,
DREM_RATE TYPE STRING,
DREM_LEDAMNT TYPE STRING,
DREM_QUAN TYPE STRING,
UPD_ID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_YHITEC_DOCDT_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_YHITEC_DOCDT_STR-MANDT sy-vline 
WA_YHITEC_DOCDT_STR-POST_YEAR sy-vline 
WA_YHITEC_DOCDT_STR-DOC_ID sy-vline 
WA_YHITEC_DOCDT_STR-REMUN_POS sy-vline 
WA_YHITEC_DOCDT_STR-DETAIL_POS sy-vline 
WA_YHITEC_DOCDT_STR-FLG_REVERSED sy-vline 
WA_YHITEC_DOCDT_STR-STATUS_POS sy-vline 
WA_YHITEC_DOCDT_STR-STATUS_WORK sy-vline 
WA_YHITEC_DOCDT_STR-PROC_STEP sy-vline 
WA_YHITEC_DOCDT_STR-RESULTTYPE sy-vline 
WA_YHITEC_DOCDT_STR-RULE_TYPE sy-vline 
WA_YHITEC_DOCDT_STR-RULE_ID sy-vline 
WA_YHITEC_DOCDT_STR-REF_POST_YEAR sy-vline 
WA_YHITEC_DOCDT_STR-REF_DOC_ID sy-vline 
WA_YHITEC_DOCDT_STR-REF_REMUN_POS sy-vline 
WA_YHITEC_DOCDT_STR-REF_DETAIL_POS sy-vline 
WA_YHITEC_DOCDT_STR-DREM_SHARE sy-vline 
WA_YHITEC_DOCDT_STR-DREM_RATE sy-vline 
WA_YHITEC_DOCDT_STR-DREM_LEDAMNT sy-vline 
WA_YHITEC_DOCDT_STR-DREM_QUAN sy-vline 
WA_YHITEC_DOCDT_STR-UPD_ID sy-vline      INTO ld_text SEPARATED BY SPACE.

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