find internal table colman

[Former Member]

Hi,

there is why to now how much Colman i have in internal table?

Regards

[Former Member]

hi,

i now that for table row number i use sy-TFILL

what i have to use to now table colman nubers

Regards

[Former Member]

Hi,

I'm not clear ur question..

[Former Member]

hi,

i now that for table row number i use sy-TFILL

what i have to use to now table colman nubers

Regards

[matt]

I think you're asking how to find the number of columns in an internal table.

Easy. Let's assume your table is call it_itab,

DATA: l_count TYPE i,
      lp_data TYPE REF TO DATA.

FIELD-SYMBOLS: <l_field> TYPE any,
              <ls_wa> TYPE any.

CREATE DATA lp_data LIKE LINE OF it_itab.
ASSIGN lp_data->* TO <ls_wa>.

l_count = 0.
DO.
  ADD 1 TO l_count.
  ASSIGN COMPONENT l_count OF STRUCTURE <ls_wa> TO <l_field>.
  IF sy-subrc IS NOT INITIAL.
    EXIT.
  ENDIF. 
ENDDO.

SUBTRACT 1 FROM l_count.

WRITE: / 'Number of columns', l_count.

Edited by: Matthew Billingham on Jul 17, 2008 10:03 AM

Better solution

[Former Member]

Hi,

please take a look into the well documentated classes of the runtime type service (RTTS). The root class for this is CL_ABAP_TYPEDESCR.

For internal table the classes CL_ABAP_TABLEDESCR and CL_ABAP_STRUCTDESCR might be interesting for you.

[Determining the Attributes of Data Objects|http://help.sap.com/saphelp_nw70/helpdata/EN/fc/eb3145358411d1829f0000e829fbfe/frameset.htm]

Regards Rudi

[matt]

>

> Hi,
> 
> please take a look into the well documentated classes of the runtime type service (RTTS). The root class for this is CL_ABAP_TYPEDESCR.
> 
> For internal table the classes CL_ABAP_TABLEDESCR and CL_ABAP_STRUCTDESCR might be interesting for you.
> 
> [Determining the Attributes of Data Objects|http://help.sap.com/saphelp_nw70/helpdata/EN/fc/eb3145358411d1829f0000e829fbfe/frameset.htm]
> 
> Regards Rudi

Much better solution than mine!

[Former Member]

hi Matthew Billingham ,

i not familiar with classes maybe u can give me e.g.

Regards

[Former Member]

Hi,

see this example:

DATA gt_mara TYPE mara_tab.

DATA gx_struc TYPE REF TO cl_abap_structdescr.
DATA gx_table TYPE REF TO cl_abap_tabledescr.
DATA gv_lines TYPE i.
FIELD-SYMBOLS <gs_components> TYPE abap_compdescr.
FIELD-SYMBOLS <gv_field> TYPE ANY.

gx_table ?= cl_abap_typedescr=>describe_by_data( gt_mara ).
gx_struc ?= gx_table->get_table_line_type( ).
DESCRIBE TABLE gx_struc->components LINES gv_lines.

Regards Rudi

[former_member125931]

Try this code.

DATA : BEGIN OF it_mara OCCURS 0,

matnr LIKE mara-matnr,

ersda LIKE mara-ersda,

END OF it_mara.

DATA : p(5) TYPE c.

FIELD-SYMBOLS: <fs_record> TYPE ANY.

FIELD-SYMBOLS: <fs_comp> TYPE ANY.

IF it_mara IS NOT INITIAL.

ASSIGN it_mara TO <fs_record>.

DO.

ASSIGN COMPONENT sy-index OF STRUCTURE <fs_record> TO <fs_comp>.

IF sy-subrc EQ 0.

p = p + 1.

ELSE.

EXIT.

ENDIF.

ENDDO.

ENDIF.

WRITE : / p.

[matt]

>

> hi Matthew Billingham ,
> 
> i not familiar with classes maybe u can give me e.g.
> 
> Regards

Follow Rudi's approach

Or - no classes with this one - haven't tried it, but it should work:

DATA: lp_data TYPE REF TO data.
FIELD-SYMBOLS: <ls_wa>.
DATA: l_count TYPE i,
      l_type  TYPE c.

CREATE DATA lp_data LIKE LINE OF itab.
ASSIGN lp_data->* TO <ls_wa>.

DESCRIBE FIELD <ls_wa> l_type COMPONENTS l_count.

Read the abap help on keywords DESCRIBE FIELD.

matt

[matt]

>

> Try this code.
> 
> DATA : BEGIN OF it_mara OCCURS 0,
> matnr LIKE mara-matnr,
> ersda LIKE mara-ersda,
> END OF it_mara.
> 
> DATA : p(5) TYPE c.
> FIELD-SYMBOLS: <fs_record> TYPE ANY.
> FIELD-SYMBOLS: <fs_comp> TYPE ANY.
> 
> IF it_mara IS NOT INITIAL.
> ASSIGN it_mara TO <fs_record>.
> DO.
> ASSIGN COMPONENT sy-index OF STRUCTURE <fs_record> TO <fs_comp>.
> IF sy-subrc EQ 0.
> p = p + 1.
> ELSE.
> EXIT.
> ENDIF.
> ENDDO.
> ENDIF.
> WRITE : / p.

Doesn't work if the table has no records in it.