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Don Burleson Blog 







max_sql_string_size Tips

Oracle Tips by Burleson Consulting

January 5, 2013

The init.ora parameter max_sql_string_size can have two values, extended and legacy, and the max_sql_string_size is used to control the maximum size for long datatypes such as varchar2, RAW and nvarchar2 data types.

You must use the scope option to re-set max_sql_string_size:

SQL> alter system set max_sql_string_size='EXTENDED';

alter system set max_sql_string_size='EXTENDED' * ERROR at line 1:
ORA-02097: parameter cannot be modified because specified value is invalid

ORA-02096: specified initialization parameter is not modifiable with this option

SQL> alter system set max_sql_string_size='EXTENDED' scope=spfile;

System altered.

Setting the max_sql_string_size=extended is required to use the new 12c features where the maximum size of varchar2 data types has been increased to 32 k.

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