I implemented a Java application which queries a database based on given set of ids using the query:
select * from STUDENT where ID in (?)
The set of ids will be used to replace ?
. However, occasionally, I receive an exception:
Caused by: java.sql.SQLException: Numeric Overflow
at oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:70)
at oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:133)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:199)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:263)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:271)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:445)
at oracle.jdbc.driver.NumberCommonAccessor.throwOverflow(NumberCommonAccessor.java:4319)
at oracle.jdbc.driver.NumberCommonAccessor.getInt(NumberCommonAccessor.java:187)
at oracle.jdbc.driver.OracleResultSetImpl.getInt(OracleResultSetImpl.java:712)
at oracle.jdbc.driver.OracleResultSet.getInt(OracleResultSet.java:434)
After some testing, I realized that if I divide the list of ids into many sub-lists with smaller size, the exception stops happening. For some reason, jdbc doesn't like putting too many values into IN (?)
. I wonder if anyone has seen this issue before and has an explanation for it? As this issue never happens on production environment but only on a local one (which has less powerful resources), I suspect it has something to do with server's resources.
Thanks
Update: the source code that I'm using is:
// create a query
private String getQueryString(int numOfParams) {
StringBuilder out = new StringBuilder();
out.append("select * from STUDENT where ID in (");
for (int i = 0; i < numOfParams; i++) {
if (i == numOfParams - 1) {
out.append("?");
} else {
out.append("?, ");
}
}
out.append(")");
}
// set parameters
private void setParams(PreparedStatement ps, Set<String> params) {
int index = 1;
for (String param: params) {
ps.setString(index++, param);
}
}
public void queryStudent(Connection conn, Set<String> ids) throws Exception {
String query = this.getQueryString(ids.size());
PreparedStatement ps = conn.prepareStatement(query);
this.setParams(ps, ids);
ps.executeQuery();
// do some operations with the result
}