on 04-27-2007 3:54 AM
hi,
wat is dynamic internal table? and dynamic selection table
wat is cardinality in abap dictionary?
hi,
Internal Tables are local tables within a program containing a series of lines having same data type. ABAPTM Open SQL allows single field, range of fields, entire database table or view into an internal table.
In technical terms Internal table is a dynamic sequential dataset in which all records have the same data structure and a key.
A static internal table can be declared in an ABAPTM program initially, when the structure of the internal table is fixed and known to the user.
Dynamic internal table is an extension to internal table concept, used when the number of fields is not known at the design time or until the compile time.
Scenario 1:
Display the table of contents in grid format using the dynamic internal table.
Creating Dynamic internal table
PARAMETERS : p_table(10) TYPE C.
DATA: w_tabname TYPE w_tabname,
w_dref TYPE REF TO data,
w_grid TYPE REF TO cl_gui_alv_grid.
FIELD-SYMBOLS: <t_itab> TYPE ANY TABLE.
w_tabname = p_table.
CREATE DATA w_dref TYPE TABLE OF (w_tabname).
ASSIGN w_dref->* TO <t_itab>.
Populating Dynamic internal table
SELECT *
FROM (w_tabname) UP TO 20 ROWS
INTO TABLE <t_itab>.
Displaying dynamic internal table using Grid.
CREATE OBJECT w_grid
EXPORTING i_parent = cl_gui_container=>screen0.
CALL METHOD w_grid->set_table_for_first_display
EXPORTING
i_structure_name = w_tabname
CHANGING
it_outtab = <t_itab>.
CALL SCREEN 100.
Scenario 2:
Create a dynamic internal table with the specified number of columns.
Creating Dynamic internal table
TYPE-POOLS: slis.
FIELD-SYMBOLS: <t_dyntable> TYPE STANDARD TABLE, Dynamic internal table name
<fs_dyntable>, Field symbol to create work area
<fs_fldval> type any. Field symbol to assign values
PARAMETERS: p_cols(5) TYPE c. Input number of columns
DATA: t_newtable TYPE REF TO data,
t_newline TYPE REF TO data,
t_fldcat TYPE slis_t_fldcat_alv,
t_fldcat TYPE lvc_t_fcat,
wa_it_fldcat TYPE lvc_s_fcat,
wa_colno(2) TYPE n,
wa_flname(5) TYPE c.
Create fields .
DO p_cols TIMES.
CLEAR wa_it_fldcat.
move sy-index to wa_colno.
concatenate 'COL'
wa_colno
into wa_flname.
wa_it_fldcat-fieldname = wa_flname.
wa_it_fldcat-datatype = 'CHAR'.
wa_it_fldcat-intlen = 10.
APPEND wa_it_fldcat TO t_fldcat.
ENDDO.
Create dynamic internal table and assign to FS
CALL METHOD cl_alv_table_create=>create_dynamic_table
EXPORTING
it_fieldcatalog = t_fldcat
IMPORTING
ep_table = t_newtable.
ASSIGN t_newtable->* TO <t_dyntable>.
Create dynamic work area and assign to FS
CREATE DATA t_newline LIKE LINE OF <t_dyntable>.
ASSIGN t_newline->* TO <fs_dyntable>.
Populating Dynamic internal table
DATA: fieldname(20) TYPE c.
DATA: fieldvalue(10) TYPE c.
DATA: index(3) TYPE c.
DO p_cols TIMES.
index = sy-index.
MOVE sy-index TO wa_colno.
CONCATENATE 'COL'
wa_colno
INTO wa_flname.
Set up fieldvalue
CONCATENATE 'VALUE' index INTO
fieldvalue.
CONDENSE fieldvalue NO-GAPS.
ASSIGN COMPONENT wa_flname
OF STRUCTURE <fs_dyntable> TO <fs_fldval>.
<fs_fldval> = fieldvalue.
ENDDO.
Append to the dynamic internal table
APPEND <fs_dyntable> TO <t_dyntable>.
Displaying dynamic internal table using Grid.
DATA: wa_cat LIKE LINE OF fs_fldcat.
DO p_cols TIMES.
CLEAR wa_cat.
MOVE sy-index TO wa_colno.
CONCATENATE 'COL'
wa_colno
INTO wa_flname.
wa_cat-fieldname = wa_flname.
wa_cat-seltext_s = wa_flname.
wa_cat-outputlen = '10'.
APPEND wa_cat TO fs_fldcat.
ENDDO.
Call ABAP List Viewer (ALV)
CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
EXPORTING
it_fieldcat = fs_fldcat
TABLES
t_outtab = <t_dyntable>.
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you can create a Dynamic Internal table .Just chek out this program .
type-pools : abap.
field-symbols: <dyn_table> type standard table,
<dyn_wa>,
<dyn_field>.
data: dy_table type ref to data,
dy_line type ref to data,
xfc type lvc_s_fcat,
ifc type lvc_t_fcat.
selection-screen begin of block b1 with frame.
parameters: p_table(30) type c default 'T001'.
selection-screen end of block b1.
start-of-selection.
perform get_structure.
perform create_dynamic_itab. *********Creates a dyanamic internal table*********
perform get_data.
perform write_out.
form get_structure.
data : idetails type abap_compdescr_tab,
xdetails type abap_compdescr.
data : ref_table_des type ref to cl_abap_structdescr.
Get the structure of the table.
ref_table_des ?=
cl_abap_typedescr=>describe_by_name( p_table ).
idetails[] = ref_table_des->components[].
loop at idetails into xdetails.
clear xfc.
xfc-fieldname = xdetails-name .
xfc-datatype = xdetails-type_kind.
xfc-inttype = xdetails-type_kind.
xfc-intlen = xdetails-length.
xfc-decimals = xdetails-decimals.
append xfc to ifc.
endloop.
endform.
form create_dynamic_itab.
Create dynamic internal table and assign to FS
call method cl_alv_table_create=>create_dynamic_table
exporting
it_fieldcatalog = ifc
importing
ep_table = dy_table.
assign dy_table->* to <dyn_table>.
Create dynamic work area and assign to FS
create data dy_line like line of <dyn_table>.
assign dy_line->* to <dyn_wa>.
endform.
form get_data.
Select Data from table.
select * into table <dyn_table>
from (p_table).
endform.
Write out data from table.
loop at <dyn_table> into <dyn_wa>.
do.
assign component sy-index
of structure <dyn_wa> to <dyn_field>.
if sy-subrc <> 0.
exit.
endif.
if sy-index = 1.
write:/ <dyn_field>.
else.
write: <dyn_field>.
endif.
enddo.
endloop.
-
REPORT ZCLUST1 .
Example: how to create a dynamic internal table
The dynamic internal table stucture
DATA: BEGIN OF STRUCT OCCURS 10,
FILDNAME(8) TYPE C,
ABPTYPE TYPE C,
LENGTH TYPE I,
END OF STRUCT.
The dynamic program source table
DATA: BEGIN OF INCTABL OCCURS 10,
LINE(72),
END OF INCTABL.
DATA: LNG TYPE I, TYPESRTING(6).
Sample dynamic internal table stucture
STRUCT-FILDNAME = 'field1'. STRUCT-ABPTYPE = 'c'. STRUCT-LENGTH = '6'.
APPEND STRUCT. CLEAR STRUCT.
STRUCT-FILDNAME = 'field2'. STRUCT-ABPTYPE = 'd'.
APPEND STRUCT. CLEAR STRUCT.
STRUCT-FILDNAME = 'field3'. STRUCT-ABPTYPE = 'i'.
APPEND STRUCT. CLEAR STRUCT.
Create the dynamic internal table definition in the dyn. program
INCTABL-LINE = 'program zdynpro.'. APPEND INCTABL.
INCTABL-LINE = 'data: begin of dyntab occurs 10,'. APPEND INCTABL.
LOOP AT STRUCT.
INCTABL-LINE = STRUCT-FILDNAME.
LNG = STRLEN( STRUCT-FILDNAME ).
IF NOT STRUCT-LENGTH IS INITIAL .
TYPESRTING(1) = '('.
TYPESRTING+1 = STRUCT-LENGTH.
TYPESRTING+5 = ')'.
CONDENSE TYPESRTING NO-GAPS.
INCTABL-LINE+LNG = TYPESRTING.
ENDIF.
INCTABL-LINE+15 = 'type '.
INCTABL-LINE+21 = STRUCT-ABPTYPE.
INCTABL-LINE+22 = ','.
APPEND INCTABL.
ENDLOOP.
INCTABL-LINE = 'end of dyntab. '.
APPEND INCTABL.
Create the code processes the dynamic internal table
INCTABL-LINE = ' '. APPEND INCTABL.
INCTABL-LINE = 'dyntab-field1 = ''aaaaaa''.'. APPEND INCTABL.
INCTABL-LINE = 'dyntab-field1 = ''19970814''.'. APPEND INCTABL.
INCTABL-LINE = 'dyntab-field1 = 1.'. APPEND INCTABL.
INCTABL-LINE = 'append dyntab.'. APPEND INCTABL.
INCTABL-LINE = ' '. APPEND INCTABL.
INCTABL-LINE = 'loop at dyntab.'. APPEND INCTABL.
INCTABL-LINE = 'write: / dyntab.'. APPEND INCTABL.
INCTABL-LINE = 'endloop.'. APPEND INCTABL.
Create and run the dynamic program
INSERT REPORT 'zdynpro'(001) FROM INCTABL.
SUBMIT ZDYNPRO.
-
or Just try out this simpler dynamic internal tables
DATA: itab TYPE STANDARD TABLE OF spfli,
wa LIKE LINE OF itab.
DATA: line(72) TYPE c,
list LIKE TABLE OF line(72).
START-OF-SELECTION.
*line = ' CITYFROM CITYTO '.
line = ' AIRPTO '.
APPEND line TO list.
SELECT DISTINCT (list)
INTO CORRESPONDING FIELDS OF TABLE itab
FROM spfli.
IF sy-subrc EQ 0.
LOOP AT itab INTO wa.
WRITE: / wa-cityfrom, wa-cityto.
WRITE 😕 wa-airpto.
ENDLOOP.
ENDIF.
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