ABAP Select data from SAP table TNLZR0 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 TNLZR0 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 TNLZR0. 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 TNLZR0 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_TNLZR0 TYPE STANDARD TABLE OF TNLZR0,
      WA_TNLZR0 TYPE TNLZR0,
      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: <TNLZR0> TYPE TNLZR0.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TNLZR0.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TNLZR0
  INTO TABLE IT_TNLZR0.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TNLZR0
*  INTO TABLE @DATA(IT_TNLZR02).
*--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_TNLZR0 INDEX 1 INTO DATA(WA_TNLZR02).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TNLZR0 ASSIGNING <TNLZR0>.
*To update a field value using a field symbol simply change the value via the field symbol pointer
<TNLZR0>-MANDT = 1.
<TNLZR0>-EINRI = 1.
<TNLZR0>-OBJECT = 1.
<TNLZR0>-NRRANGENR = 1.
<TNLZR0>-PATEX = 1.
ENDLOOP.

LOOP AT IT_TNLZR0 INTO WA_TNLZR0.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TNLZR0-FLD01, sy-vline,
WA_TNLZR0-FLD02, sy-vline,
WA_TNLZR0-FLD03, sy-vline,
WA_TNLZR0-FLD04, sy-vline,
WA_TNLZR0-FLD05, sy-vline,
WA_TNLZR0-FLD06, sy-vline.
ENDLOOP. *Add any further fields from structure WA_TNLZR0 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_TNLZR0 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_TNLZR0 INTO WA_TNLZR0. *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 EINRI CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT' EXPORTING input = WA_TNLZR0-EINRI IMPORTING output = ld_input.
WRITE:/ 'Org Value:', WA_TNLZR0-EINRI.
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_TNLZR0_STR,
MANDT TYPE STRING,
EINRI TYPE STRING,
OBJECT TYPE STRING,
NRRANGENR TYPE STRING,
PATEX TYPE STRING,
FLD01 TYPE STRING,
FLD02 TYPE STRING,
FLD03 TYPE STRING,
FLD04 TYPE STRING,
FLD05 TYPE STRING,
FLD06 TYPE STRING,
FLD07 TYPE STRING,
FLD08 TYPE STRING,
FLD09 TYPE STRING,
FLD10 TYPE STRING,END OF T_EKKO_STR. DATA: WA_TNLZR0_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_TNLZR0_STR-MANDT sy-vline
WA_TNLZR0_STR-EINRI sy-vline
WA_TNLZR0_STR-OBJECT sy-vline
WA_TNLZR0_STR-NRRANGENR sy-vline
WA_TNLZR0_STR-PATEX sy-vline
WA_TNLZR0_STR-FLD01 sy-vline
WA_TNLZR0_STR-FLD02 sy-vline
WA_TNLZR0_STR-FLD03 sy-vline
WA_TNLZR0_STR-FLD04 sy-vline
WA_TNLZR0_STR-FLD05 sy-vline
WA_TNLZR0_STR-FLD06 sy-vline
WA_TNLZR0_STR-FLD07 sy-vline
WA_TNLZR0_STR-FLD08 sy-vline
WA_TNLZR0_STR-FLD09 sy-vline
WA_TNLZR0_STR-FLD10 sy-vline INTO ld_text SEPARATED BY SPACE. *Add any further fields from structure WA_EKKO_STR you want to CONCATENATE... ENDLOOP. ENDFORM.