ABAP Select data from SAP table BLOCK_LGART into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BLOCK_LGART
*  INTO TABLE @DATA(IT_BLOCK_LGART2).
*--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_BLOCK_LGART INDEX 1 INTO DATA(WA_BLOCK_LGART2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BLOCK_LGART>-MOLGA0 = 1.
<BLOCK_LGART>-LGART0 = 1.
<BLOCK_LGART>-MOLGA1 = 1.
<BLOCK_LGART>-LGART1 = 1.
<BLOCK_LGART>-MOLGA2 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BLOCK_LGART-LGART2, sy-vline,
  WA_BLOCK_LGART-MOLGA3, sy-vline,
  WA_BLOCK_LGART-LGART3, sy-vline,
  WA_BLOCK_LGART-MOLGA4, sy-vline,
  WA_BLOCK_LGART-LGART4, sy-vline,
  WA_BLOCK_LGART-MOLGA5, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BLOCK_LGART 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_BLOCK_LGART 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_BLOCK_LGART INTO WA_BLOCK_LGART.


*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_BLOCK_LGART_STR, 
MOLGA0 TYPE STRING,
LGART0 TYPE STRING,
MOLGA1 TYPE STRING,
LGART1 TYPE STRING,
MOLGA2 TYPE STRING,
LGART2 TYPE STRING,
MOLGA3 TYPE STRING,
LGART3 TYPE STRING,
MOLGA4 TYPE STRING,
LGART4 TYPE STRING,
MOLGA5 TYPE STRING,
LGART5 TYPE STRING,
MOLGA6 TYPE STRING,
LGART6 TYPE STRING,
MOLGA7 TYPE STRING,
LGART7 TYPE STRING,
MOLGA8 TYPE STRING,
LGART8 TYPE STRING,
MOLGA9 TYPE STRING,
LGART9 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BLOCK_LGART_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_BLOCK_LGART_STR-MOLGA0 sy-vline 
WA_BLOCK_LGART_STR-LGART0 sy-vline 
WA_BLOCK_LGART_STR-MOLGA1 sy-vline 
WA_BLOCK_LGART_STR-LGART1 sy-vline 
WA_BLOCK_LGART_STR-MOLGA2 sy-vline 
WA_BLOCK_LGART_STR-LGART2 sy-vline 
WA_BLOCK_LGART_STR-MOLGA3 sy-vline 
WA_BLOCK_LGART_STR-LGART3 sy-vline 
WA_BLOCK_LGART_STR-MOLGA4 sy-vline 
WA_BLOCK_LGART_STR-LGART4 sy-vline 
WA_BLOCK_LGART_STR-MOLGA5 sy-vline 
WA_BLOCK_LGART_STR-LGART5 sy-vline 
WA_BLOCK_LGART_STR-MOLGA6 sy-vline 
WA_BLOCK_LGART_STR-LGART6 sy-vline 
WA_BLOCK_LGART_STR-MOLGA7 sy-vline 
WA_BLOCK_LGART_STR-LGART7 sy-vline 
WA_BLOCK_LGART_STR-MOLGA8 sy-vline 
WA_BLOCK_LGART_STR-LGART8 sy-vline 
WA_BLOCK_LGART_STR-MOLGA9 sy-vline 
WA_BLOCK_LGART_STR-LGART9 sy-vline      INTO ld_text SEPARATED BY SPACE.

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