ABAP Select data from SAP table LZGZN 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 LZGZN 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 LZGZN. 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 LZGZN 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_LZGZN TYPE STANDARD TABLE OF LZGZN, WA_LZGZN TYPE LZGZN, 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: <LZGZN> TYPE LZGZN. *Process all fields in table header/work area as string values PERFORM process_as_string_field_values CHANGING wa_LZGZN. SELECT * *restrict ABAP select to first 10 rows UP TO 10 ROWS FROM LZGZN INTO TABLE IT_LZGZN. *Select data and declare internal table using in-line method @DATA *SELECT * * FROM LZGZN * INTO TABLE @DATA(IT_LZGZN2). *--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_LZGZN INDEX 1 INTO DATA(WA_LZGZN2). *Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL LOOP AT IT_LZGZN ASSIGNING <LZGZN>.*To update a field value using a field symbol simply change the value via the field symbol pointer
<LZGZN>-MANDT = 1.
<LZGZN>-LOCAT = 1.
<LZGZN>-ZNGRP = 1.
<LZGZN>-RZONE = 1.
ENDLOOP. LOOP AT IT_LZGZN INTO WA_LZGZN. *Write horizonal line to screen report. WRITE:/ sy-uline. *Write selected data to screen/report before conversion. WRITE:/ sy-vline, ENDLOOP. *Add any further fields from structure WA_LZGZN 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_LZGZN 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_LZGZN INTO WA_LZGZN. *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.
ENDFORM. *&---------------------------------------------------------------------* *& Form process_as_string_field_values *&---------------------------------------------------------------------* FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO. TYPES: BEGIN OF T_LZGZN_STR,
MANDT TYPE STRING,
LOCAT TYPE STRING,
ZNGRP TYPE STRING,
RZONE TYPE STRING,END OF T_EKKO_STR. DATA: WA_LZGZN_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_LZGZN_STR-MANDT sy-vline
WA_LZGZN_STR-LOCAT sy-vline
WA_LZGZN_STR-ZNGRP sy-vline
WA_LZGZN_STR-RZONE sy-vline INTO ld_text SEPARATED BY SPACE. *Add any further fields from structure WA_EKKO_STR you want to CONCATENATE... ENDLOOP. ENDFORM.