ABAP Select data from SAP table KWNLOIO into internal table
Get Example source ABAP code based on a different SAP table
Below is a number of ABAP code snippets to demonstrate how to select data from SAP KWNLOIO 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 KWNLOIO. 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 KWNLOIO 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_KWNLOIO TYPE STANDARD TABLE OF KWNLOIO,
WA_KWNLOIO TYPE KWNLOIO,
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: <KWNLOIO> TYPE KWNLOIO.
*Process all fields in table header/work area as string values
PERFORM process_as_string_field_values CHANGING wa_KWNLOIO.
SELECT *
*restrict ABAP select to first 10 rows
UP TO 10 ROWS
FROM KWNLOIO
INTO TABLE IT_KWNLOIO.
*Select data and declare internal table using in-line method @DATA
*SELECT *
* FROM KWNLOIO
* INTO TABLE @DATA(IT_KWNLOIO2).
*--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_KWNLOIO INDEX 1 INTO DATA(WA_KWNLOIO2).
*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KWNLOIO ASSIGNING <KWNLOIO>.
*To update a field value using a field symbol simply change the value via the field symbol pointer<KWNLOIO>-LOIO_ID = 1.
<KWNLOIO>-LO_CLASS = 1.
<KWNLOIO>-MASTER_LG = 1.
<KWNLOIO>-CREA_USER = 1.
<KWNLOIO>-CREA_TIME = 1.
ENDLOOP. LOOP AT IT_KWNLOIO INTO WA_KWNLOIO. *Write horizonal line to screen report. WRITE:/ sy-uline. *Write selected data to screen/report before conversion. WRITE:/ sy-vline, WA_KWNLOIO-CHNG_USER, sy-vline,
WA_KWNLOIO-CHNG_TIME, sy-vline,
WA_KWNLOIO-PROP01, sy-vline,
WA_KWNLOIO-PROP02, sy-vline,
WA_KWNLOIO-PROP03, sy-vline,
WA_KWNLOIO-PROP04, sy-vline.
ENDLOOP. *Add any further fields from structure WA_KWNLOIO 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_KWNLOIO 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_KWNLOIO INTO WA_KWNLOIO. *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 ISOLA, internal->external for field MASTER_LG CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT' EXPORTING input = WA_KWNLOIO-MASTER_LG IMPORTING output = ld_input.
WRITE:/ 'Org Value:', WA_KWNLOIO-MASTER_LG.
WRITE:/ 'New Value:', ld_input.
*Conversion exit TSTLC, internal->external for field CREA_TIME CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT' EXPORTING input = WA_KWNLOIO-CREA_TIME IMPORTING output = ld_input.
WRITE:/ 'Org Value:', WA_KWNLOIO-CREA_TIME.
WRITE:/ 'New Value:', ld_input.
*Conversion exit TSTLC, internal->external for field CHNG_TIME CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT' EXPORTING input = WA_KWNLOIO-CHNG_TIME IMPORTING output = ld_input.
WRITE:/ 'Org Value:', WA_KWNLOIO-CHNG_TIME.
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_KWNLOIO_STR,
LOIO_ID TYPE STRING,
LO_CLASS TYPE STRING,
MASTER_LG TYPE STRING,
CREA_USER TYPE STRING,
CREA_TIME TYPE STRING,
CHNG_USER TYPE STRING,
CHNG_TIME TYPE STRING,
PROP01 TYPE STRING,
PROP02 TYPE STRING,
PROP03 TYPE STRING,
PROP04 TYPE STRING,
PROP05 TYPE STRING,
PROP06 TYPE STRING,
PROP07 TYPE STRING,
PROP08 TYPE STRING,
PROP09 TYPE STRING,
PROP10 TYPE STRING,END OF T_EKKO_STR. DATA: WA_KWNLOIO_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_KWNLOIO_STR-LOIO_ID sy-vline
WA_KWNLOIO_STR-LO_CLASS sy-vline
WA_KWNLOIO_STR-MASTER_LG sy-vline
WA_KWNLOIO_STR-CREA_USER sy-vline
WA_KWNLOIO_STR-CREA_TIME sy-vline
WA_KWNLOIO_STR-CHNG_USER sy-vline
WA_KWNLOIO_STR-CHNG_TIME sy-vline
WA_KWNLOIO_STR-PROP01 sy-vline
WA_KWNLOIO_STR-PROP02 sy-vline
WA_KWNLOIO_STR-PROP03 sy-vline
WA_KWNLOIO_STR-PROP04 sy-vline
WA_KWNLOIO_STR-PROP05 sy-vline
WA_KWNLOIO_STR-PROP06 sy-vline
WA_KWNLOIO_STR-PROP07 sy-vline
WA_KWNLOIO_STR-PROP08 sy-vline
WA_KWNLOIO_STR-PROP09 sy-vline
WA_KWNLOIO_STR-PROP10 sy-vline INTO ld_text SEPARATED BY SPACE. *Add any further fields from structure WA_EKKO_STR you want to CONCATENATE... ENDLOOP. ENDFORM.
