ABAP Select data from SAP table ISU21_PRINT_DOC_M18 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ISU21_PRINT_DOC_M18 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 ISU21_PRINT_DOC_M18. 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 ISU21_PRINT_DOC_M18 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_ISU21_PRINT_DOC_M18 TYPE STANDARD TABLE OF ISU21_PRINT_DOC_M18,
      WA_ISU21_PRINT_DOC_M18 TYPE ISU21_PRINT_DOC_M18,
      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: <ISU21_PRINT_DOC_M18> TYPE ISU21_PRINT_DOC_M18.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ISU21_PRINT_DOC_M18.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ISU21_PRINT_DOC_M18
  INTO TABLE IT_ISU21_PRINT_DOC_M18.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISU21_PRINT_DOC_M18
*  INTO TABLE @DATA(IT_ISU21_PRINT_DOC_M182).
*--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_ISU21_PRINT_DOC_M18 INDEX 1 INTO DATA(WA_ISU21_PRINT_DOC_M182).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ISU21_PRINT_DOC_M18 ASSIGNING <ISU21_PRINT_DOC_M18>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISU21_PRINT_DOC_M18>-ERDK = 1.
<ISU21_PRINT_DOC_M18>-MANDT = 1.
<ISU21_PRINT_DOC_M18>-OPBEL = 1.
<ISU21_PRINT_DOC_M18>-DRUCKDAT = 1.
<ISU21_PRINT_DOC_M18>-FAEDN = 1.

ENDLOOP.

LOOP AT IT_ISU21_PRINT_DOC_M18 INTO WA_ISU21_PRINT_DOC_M18.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISU21_PRINT_DOC_M18-FAEDS, sy-vline,
  WA_ISU21_PRINT_DOC_M18-SKTPZ, sy-vline,
  WA_ISU21_PRINT_DOC_M18-BUDAT, sy-vline,
  WA_ISU21_PRINT_DOC_M18-BLDAT, sy-vline,
  WA_ISU21_PRINT_DOC_M18-STOKZ, sy-vline,
  WA_ISU21_PRINT_DOC_M18-INTOPBEL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISU21_PRINT_DOC_M18 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_ISU21_PRINT_DOC_M18 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_ISU21_PRINT_DOC_M18 INTO WA_ISU21_PRINT_DOC_M18.


*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 OPBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISU21_PRINT_DOC_M18-OPBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21_PRINT_DOC_M18-OPBEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field INTOPBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISU21_PRINT_DOC_M18-INTOPBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21_PRINT_DOC_M18-INTOPBEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NRZAS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISU21_PRINT_DOC_M18-NRZAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21_PRINT_DOC_M18-NRZAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISU21_PRINT_DOC_M18-PARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21_PRINT_DOC_M18-PARTNER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISU21_PRINT_DOC_M18-VKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21_PRINT_DOC_M18-VKONT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ABWVK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISU21_PRINT_DOC_M18-ABWVK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21_PRINT_DOC_M18-ABWVK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ABWBL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISU21_PRINT_DOC_M18-ABWBL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21_PRINT_DOC_M18-ABWBL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_ISU21_PRINT_DOC_M18-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21_PRINT_DOC_M18-LANGU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field STO_OPBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISU21_PRINT_DOC_M18-STO_OPBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21_PRINT_DOC_M18-STO_OPBEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXBEL, internal->external for field EXBEL
CALL FUNCTION 'CONVERSION_EXIT_EXBEL_OUTPUT'
  EXPORTING
    input =                      WA_ISU21_PRINT_DOC_M18-EXBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21_PRINT_DOC_M18-EXBEL.
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_ISU21_PRINT_DOC_M18_STR, 
ERDK TYPE STRING,
MANDT TYPE STRING,
OPBEL TYPE STRING,
DRUCKDAT TYPE STRING,
FAEDN TYPE STRING,
FAEDS TYPE STRING,
SKTPZ TYPE STRING,
BUDAT TYPE STRING,
BLDAT TYPE STRING,
STOKZ TYPE STRING,
INTOPBEL TYPE STRING,
ERDZ_V TYPE STRING,
ERDR_V TYPE STRING,
ERDO_V TYPE STRING,
ERDB_V TYPE STRING,
ERDU_V TYPE STRING,
ERDTS_V TYPE STRING,
FICA_V TYPE STRING,
TOTAL_AMNT TYPE STRING,
TOTAL_WAER TYPE STRING,
TOTAL_AMNT_USE TYPE STRING,
PYMET TYPE STRING,
ZSBTR TYPE STRING,
ZLSCH TYPE STRING,
NRZAS TYPE STRING,
PARTNER TYPE STRING,
VKONT TYPE STRING,
PORTION TYPE STRING,
ABRVORG TYPE STRING,
FORMKEY TYPE STRING,
FIKEY TYPE STRING,
TOBRELEASD TYPE STRING,
SIMULATED TYPE STRING,
INVOICED TYPE STRING,
ABWVK TYPE STRING,
ABWBL TYPE STRING,
ERGRD TYPE STRING,
LANGU TYPE STRING,
INVOICING_PARTY TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
BEGRU TYPE STRING,
LOEVM TYPE STRING,
VERART TYPE STRING,
STO_BUDAT TYPE STRING,
STO_OPBEL TYPE STRING,
ICREASON TYPE STRING,
MAZAE TYPE STRING,
ITEMS_ARCHIVED TYPE STRING,
EXKID TYPE STRING,
EXBEL TYPE STRING,
MAZAE_ABS TYPE STRING,
PRINTLOCK TYPE STRING,
EDIDISPATCH TYPE STRING,
EDISENDDATE TYPE STRING,
TAXDATE TYPE STRING,
CREATION_TIME TYPE STRING,
BILLING_PERIOD TYPE STRING,
OSB_GROUP TYPE STRING,
REVLOCK TYPE STRING,
SEPA_PRENOT TYPE STRING,
INVDOCNO TYPE STRING,
SELECTION_DATE TYPE STRING,
T_ERDO TYPE STRING,
T_ERDZ TYPE STRING,
T_ERDR TYPE STRING,
T_ERDB TYPE STRING,
T_ERDU TYPE STRING,
T_ERDTS TYPE STRING,
T_ERDT TYPE STRING,
T_ERDE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISU21_PRINT_DOC_M18_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_ISU21_PRINT_DOC_M18_STR-ERDK sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-MANDT sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-OPBEL sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-DRUCKDAT sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-FAEDN sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-FAEDS sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-SKTPZ sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-BUDAT sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-BLDAT sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-STOKZ sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-INTOPBEL sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-ERDZ_V sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-ERDR_V sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-ERDO_V sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-ERDB_V sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-ERDU_V sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-ERDTS_V sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-FICA_V sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-TOTAL_AMNT sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-TOTAL_WAER sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-TOTAL_AMNT_USE sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-PYMET sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-ZSBTR sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-ZLSCH sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-NRZAS sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-PARTNER sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-VKONT sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-PORTION sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-ABRVORG sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-FORMKEY sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-FIKEY sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-TOBRELEASD sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-SIMULATED sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-INVOICED sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-ABWVK sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-ABWBL sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-ERGRD sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-LANGU sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-INVOICING_PARTY sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-ERDAT sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-ERNAM sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-AEDAT sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-AENAM sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-BEGRU sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-LOEVM sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-VERART sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-STO_BUDAT sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-STO_OPBEL sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-ICREASON sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-MAZAE sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-ITEMS_ARCHIVED sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-EXKID sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-EXBEL sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-MAZAE_ABS sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-PRINTLOCK sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-EDIDISPATCH sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-EDISENDDATE sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-TAXDATE sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-CREATION_TIME sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-BILLING_PERIOD sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-OSB_GROUP sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-REVLOCK sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-SEPA_PRENOT sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-INVDOCNO sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-SELECTION_DATE sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-T_ERDO sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-T_ERDZ sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-T_ERDR sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-T_ERDB sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-T_ERDU sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-T_ERDTS sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-T_ERDT sy-vline 
WA_ISU21_PRINT_DOC_M18_STR-T_ERDE sy-vline      INTO ld_text SEPARATED BY SPACE.

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