fill SQL string variable without single quotes

[Peter Cai]

Hi, I used this mapping to get the schema information for a table:     <parameterMap id="select-field-para" class="fieldParameter">       <parameter property="table" />       <parameter property="schema" />     </parameterMap>     <statement id="getFieldList" parameterMap="select-field-para">       show columns from ? from ?     </statement> when I set table="product" schema="jpetstore" in fieldParameter class (both schema and table are java String type). I really want a sql statement like this     " show columns from product from jpetstore " But iBATIS will generate a statement like this:     " show columns from 'product' from 'jpetstore' " So MySQL database always complaint an error. How to fix it? Thank you very much! Peter