A positioned update or delete issued against a cursor being accessed through a ResultSet object modifies or deletes the current row of the ResultSet object.
Some intermediate protocols might pre-fetch rows. This causes positioned updates and deletes to operate against the row the underlying cursor is on, and not the current row of the ResultSet.
Derby provides all the required JDBC 1.2 type conversions of the getXXX methods.
JDBC does not define the sort of rounding to use for ResultSet.getBigDecimal. Derby uses java.math.BigDecimal.ROUND_HALF_DOWN.
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