带参数的sql语句
1.table1（id，name）
更新语句：update table1 set name=? where id=?;
因为这种参数格式不带参数名，这样参数值就得事先排序，操作起来很不方便。想问下有无带参数名的格式？

2.有谁知道locopy函数的用法。现在想更新blob字段，不知道大家用什么方法？

[解决办法]
LOCopy没用过，以下是我google来的。
LOCopy
This function creates a copy of a smart large object.
Syntax
SQL
CREATE FUNCTION LOCopy (lob LLD_Lob)
RETURNS LLD_Lob ;

CREATE FUNCTION LOCopy (lob, LLD_Lob, table_name, CHAR(18),
column_name, CHAR(18))
RETURNS LLD_Lob;
;
lob
is a pointer to the smart large object to copy.
table_name
is a table name. This parameter is optional.
column_name
is a column name. This parameter is optional.
Usage
This function is an overloaded version of the LOCopy built-in server function. This function is identical to the built-in version of the function, except the first parameter is an lld_lob type rather than a BLOB or CLOB type.

The table_name and column_name parameters are optional. If you specify a table_name and column_name, LOCopy uses the storage characteristics from the specified column_name for the new smart large object that it creates.

If you omit table_name and column_name, LOCopy creates a smart large object with system-specified storage defaults.

See the description of the LOCopy function in the IBM Informix: Guide to SQL Syntax for complete information about this function.

Return codes
This function returns a pointer to the new lld_lob value.

Context
LOCopy in the IBM Informix: Guide to SQL Syntax