8.5.20 getBytes(String columnName)
- Organization of this subsection
(1) Function
This method acquires as a byte array in the Java programming language the value in a specified column in the current row of the ResultSet object. The column whose value is to be acquired is specified in the argument.
The byte value indicates the row value returned by the JDBC driver.
(2) Format
public synchronized byte[] getBytes(String columnName) throws SQLException
(3) Arguments
- String columnName
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Specifies a column name.
(4) Return value
This method returns the column value. For details about the relationship between the retrieval result and the return value, see Table 8‒23: Relationship between the retrieval result and the return value (getBytes method).
(5) Exceptions
The JDBC driver throws an SQLException in the following cases:
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This ResultSet object is closed.
This includes the case where the ResultSet object was closed because the Statement object that created this ResultSet object was closed.
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The Connection used to create the Statement object that created this ResultSet object has been closed.
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The ResultSet object has become invalid due to transaction settlement.
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A nonexistent column name was specified.
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The data type cannot be acquired by this method.
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An error occurred in the JDBC driver.