ABAP Select data from SAP table DB6CATCOL 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 DB6CATCOL 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 DB6CATCOL. 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 DB6CATCOL 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_DB6CATCOL TYPE STANDARD TABLE OF DB6CATCOL,
      WA_DB6CATCOL TYPE DB6CATCOL,
      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: <DB6CATCOL> TYPE DB6CATCOL.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB6CATCOL.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB6CATCOL
  INTO TABLE IT_DB6CATCOL.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB6CATCOL
*  INTO TABLE @DATA(IT_DB6CATCOL2).
*--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_DB6CATCOL INDEX 1 INTO DATA(WA_DB6CATCOL2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB6CATCOL ASSIGNING <DB6CATCOL>.
*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB6CATCOL>-TABSCHEMA = 1.
<DB6CATCOL>-TABNAME = 1.
<DB6CATCOL>-COLNAME = 1.
<DB6CATCOL>-COLNO = 1.
<DB6CATCOL>-TYPESCHEMA = 1.
ENDLOOP.

LOOP AT IT_DB6CATCOL INTO WA_DB6CATCOL.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB6CATCOL-TYPENAME, sy-vline,
WA_DB6CATCOL-LENGTH, sy-vline,
WA_DB6CATCOL-SCALE, sy-vline,
WA_DB6CATCOL-DEFAULT, sy-vline,
WA_DB6CATCOL-NULLS, sy-vline,
WA_DB6CATCOL-CODEPAGE, sy-vline.
ENDLOOP. *Add any further fields from structure WA_DB6CATCOL 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_DB6CATCOL 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_DB6CATCOL INTO WA_DB6CATCOL. *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_DB6CATCOL_STR,
TABSCHEMA TYPE STRING,
TABNAME TYPE STRING,
COLNAME TYPE STRING,
COLNO TYPE STRING,
TYPESCHEMA TYPE STRING,
TYPENAME TYPE STRING,
LENGTH TYPE STRING,
SCALE TYPE STRING,
DEFAULT TYPE STRING,
NULLS TYPE STRING,
CODEPAGE TYPE STRING,
LOGGED TYPE STRING,
COMPACT TYPE STRING,
COLCARD TYPE STRING,
HIGH2KEY TYPE STRING,
LOW2KEY TYPE STRING,
AVGCOLLEN TYPE STRING,
KEYSEQ TYPE STRING,
PARTKEYSEQ TYPE STRING,
NQUANTILES TYPE STRING,
NMOSTFREQ TYPE STRING,
NUMNULLS TYPE STRING,
INLINE_LENGTH TYPE STRING,
HIDDEN TYPE STRING,END OF T_EKKO_STR. DATA: WA_DB6CATCOL_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_DB6CATCOL_STR-TABSCHEMA sy-vline
WA_DB6CATCOL_STR-TABNAME sy-vline
WA_DB6CATCOL_STR-COLNAME sy-vline
WA_DB6CATCOL_STR-COLNO sy-vline
WA_DB6CATCOL_STR-TYPESCHEMA sy-vline
WA_DB6CATCOL_STR-TYPENAME sy-vline
WA_DB6CATCOL_STR-LENGTH sy-vline
WA_DB6CATCOL_STR-SCALE sy-vline
WA_DB6CATCOL_STR-DEFAULT sy-vline
WA_DB6CATCOL_STR-NULLS sy-vline
WA_DB6CATCOL_STR-CODEPAGE sy-vline
WA_DB6CATCOL_STR-LOGGED sy-vline
WA_DB6CATCOL_STR-COMPACT sy-vline
WA_DB6CATCOL_STR-COLCARD sy-vline
WA_DB6CATCOL_STR-HIGH2KEY sy-vline
WA_DB6CATCOL_STR-LOW2KEY sy-vline
WA_DB6CATCOL_STR-AVGCOLLEN sy-vline
WA_DB6CATCOL_STR-KEYSEQ sy-vline
WA_DB6CATCOL_STR-PARTKEYSEQ sy-vline
WA_DB6CATCOL_STR-NQUANTILES sy-vline
WA_DB6CATCOL_STR-NMOSTFREQ sy-vline
WA_DB6CATCOL_STR-NUMNULLS sy-vline
WA_DB6CATCOL_STR-INLINE_LENGTH sy-vline
WA_DB6CATCOL_STR-HIDDEN sy-vline INTO ld_text SEPARATED BY SPACE. *Add any further fields from structure WA_EKKO_STR you want to CONCATENATE... ENDLOOP. ENDFORM.