8.5.19 getBytes(int columnIndex)

(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.

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(2) Format

public synchronized byte[] getBytes(int columnIndex) throws SQLException

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(3) Arguments

int columnIndex

Specifies a column number.

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(4) Return value

This method returns the column value. The following table shows the relationship between the retrieval result and the return value.

Table 8‒23: Relationship between the retrieval result and the return value (getBytes method)

HADB data type	Retrieval result	Return value
BINARY VARBINARY	Null value	null
	Other than the above	Retrieval result converted to a byte value
ROW	The retrieval result will never be the null value.	Retrieval result converted to a byte value
Other	Not applicable	SQLException is thrown.

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(5) Exceptions

The JDBC driver throws an SQLException in the following cases:

• 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.

• The Connection used to create the Statement object that created this ResultSet object has been closed.

• The ResultSet object has become invalid due to transaction settlement.

• A nonexistent column number was specified.

• The data type cannot be acquired by this method.

• An error occurred in the JDBC driver.

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