Column count of dynamic query

Question

how can ı find column count of dynamic query
is there a simple way
thanks

Answer 1

You can use DBMS_SQL to facilitate this:
CREATE OR REPLACE FUNCTION count_sql( p_sql IN CLOB )
RETURN INTEGER
AS
        lv_cursor_id    INTEGER;
        lv_columns      DBMS_SQL.DESC_TAB;
        lv_column_count INTEGER;
BEGIN
        -- Open Cursor
        lv_cursor_id := DBMS_SQL.OPEN_CURSOR;
        -- Parse Cursor
        DBMS_SQL.PARSE
        ( c             => lv_cursor_id
        , statement     => p_sql
        , language_flag => DBMS_SQL.NATIVE
        -- Describe Columns
        DBMS_SQL.DESCRIBE_COLUMNS
        ( c       => lv_cursor_id   
        , col_cnt => lv_column_count
        , desc_t  => lv_columns
        -- Close Cursor
        DBMS_SQL.CLOSE_CURSOR(lv_cursor_id);
        RETURN lv_column_count;
END count_sql;
/Example:
SQL > SELECT * FROM V$VERSION;
BANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
PL/SQL Release 11.2.0.1.0 - Production
CORE    11.2.0.1.0      Production
TNS for 32-bit Windows: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production
SQL > SELECT count_sql('SELECT dummy, dummy, CASE WHEN dummy = ''X'' THEN 1 ELSE 0 END AS col FROM DUAL') FROM DUAL;
COUNT_SQL('SELECTDUMMY,DUMMY,CASEWHENDUMMY=''X''THEN1ELSE0ENDASCOLFROMDUAL')
                                                                           3
SQL > SELECT count_sql('SELECT dummy, dummy, dummy, ''Y'' FROM DUAL') FROM DUAL;
COUNT_SQL('SELECTDUMMY,DUMMY,DUMMY,''Y''FROMDUAL')
                                                 4Hope this helps!