ABAP Select data from SAP table EHSWAV_APPQUANT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EHSWAV_APPQUANT
*  INTO TABLE @DATA(IT_EHSWAV_APPQUANT2).
*--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_EHSWAV_APPQUANT INDEX 1 INTO DATA(WA_EHSWAV_APPQUANT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EHSWAV_APPQUANT>-MANDT = 1.
<EHSWAV_APPQUANT>-RECN = 1.
<EHSWAV_APPQUANT>-ACTN = 1.
<EHSWAV_APPQUANT>-INTAPPNO = 1.
<EHSWAV_APPQUANT>-APPNO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EHSWAV_APPQUANT-APPSTATUS, sy-vline,
  WA_EHSWAV_APPQUANT-APC, sy-vline,
  WA_EHSWAV_APPQUANT-RECNWAKEY, sy-vline,
  WA_EHSWAV_APPQUANT-APWAKEY, sy-vline,
  WA_EHSWAV_APPQUANT-APCKQUAN, sy-vline,
  WA_EHSWAV_APPQUANT-APCKU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EHSWAV_APPQUANT 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_EHSWAV_APPQUANT 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_EHSWAV_APPQUANT INTO WA_EHSWAV_APPQUANT.


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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field RECNSUBST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EHSWAV_APPQUANT-RECNSUBST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHSWAV_APPQUANT-RECNSUBST.
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_EHSWAV_APPQUANT_STR, 
MANDT TYPE STRING,
RECN TYPE STRING,
ACTN TYPE STRING,
INTAPPNO TYPE STRING,
APPNO TYPE STRING,
APPSTATUS TYPE STRING,
APC TYPE STRING,
RECNWAKEY TYPE STRING,
APWAKEY TYPE STRING,
APCKQUAN TYPE STRING,
APCKU TYPE STRING,
APDISQUAN TYPE STRING,
APDISU TYPE STRING,
APPQUAN TYPE STRING,
APPQUANU TYPE STRING,
APDISCAT TYPE STRING,
APDISMETH TYPE STRING,
APDISPROC TYPE STRING,
APFRE TYPE STRING,
RECNSUBST TYPE STRING,
APPACCAT TYPE STRING,
APVALFROM TYPE STRING,
APVALTO TYPE STRING,
RECN_APPWAKEY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EHSWAV_APPQUANT_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_EHSWAV_APPQUANT_STR-MANDT sy-vline 
WA_EHSWAV_APPQUANT_STR-RECN sy-vline 
WA_EHSWAV_APPQUANT_STR-ACTN sy-vline 
WA_EHSWAV_APPQUANT_STR-INTAPPNO sy-vline 
WA_EHSWAV_APPQUANT_STR-APPNO sy-vline 
WA_EHSWAV_APPQUANT_STR-APPSTATUS sy-vline 
WA_EHSWAV_APPQUANT_STR-APC sy-vline 
WA_EHSWAV_APPQUANT_STR-RECNWAKEY sy-vline 
WA_EHSWAV_APPQUANT_STR-APWAKEY sy-vline 
WA_EHSWAV_APPQUANT_STR-APCKQUAN sy-vline 
WA_EHSWAV_APPQUANT_STR-APCKU sy-vline 
WA_EHSWAV_APPQUANT_STR-APDISQUAN sy-vline 
WA_EHSWAV_APPQUANT_STR-APDISU sy-vline 
WA_EHSWAV_APPQUANT_STR-APPQUAN sy-vline 
WA_EHSWAV_APPQUANT_STR-APPQUANU sy-vline 
WA_EHSWAV_APPQUANT_STR-APDISCAT sy-vline 
WA_EHSWAV_APPQUANT_STR-APDISMETH sy-vline 
WA_EHSWAV_APPQUANT_STR-APDISPROC sy-vline 
WA_EHSWAV_APPQUANT_STR-APFRE sy-vline 
WA_EHSWAV_APPQUANT_STR-RECNSUBST sy-vline 
WA_EHSWAV_APPQUANT_STR-APPACCAT sy-vline 
WA_EHSWAV_APPQUANT_STR-APVALFROM sy-vline 
WA_EHSWAV_APPQUANT_STR-APVALTO sy-vline 
WA_EHSWAV_APPQUANT_STR-RECN_APPWAKEY sy-vline      INTO ld_text SEPARATED BY SPACE.

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