How Can I Use a Dynamic Table Name with Java PreparedStatements for Batch Inserts?

Dynamic Table Names in Java PreparedStatement Batch Inserts

Using Java's PreparedStatement for batch INSERT operations often requires dynamically specifying the target table name. However, PreparedStatements are designed to parameterize column values, not table names.

The Solution: Dynamic SQL Construction

The key is to build the SQL query dynamically, rather than trying to parameterize the table name itself. Concatenate the table name (stored, for example, in tableNameVar) into the SQL string, leaving placeholders for the column values.

<code class="language-java">// tableNameVar holds the dynamic table name
String sql = String.format("INSERT INTO %s (col1, col2, col3, col4, col5) VALUES (?,?,?,?,?);", tableNameVar);</code>

After constructing the SQL query with the dynamic table name, use PreparedStatement's setString() (or other appropriate setXXX() methods) to populate the column value placeholders:

<code class="language-java">preparedStatement.setString(1, "col1Value");
preparedStatement.setString(2, "col2Value");
// ... set remaining column values</code>

This method combines the flexibility of dynamic table names with the performance and security benefits of PreparedStatement. Ensure the order of placeholders in your SQL string precisely matches the order of your setXXX() calls.

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