8.5.49 getString(int columnIndex)

(1) Function

This method acquires as String 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 String getString(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 8‒34: Relationship between the retrieval result and the return value (getString method)

HADB data type	Retrieval result	Return value
CHAR VARCHAR	Null value	null
	Other than the above	retrieval-result
SMALLINT	Null value	null
	Other than the above	String object containing the retrieval result in character string representation
INTEGER	Null value	null
	Other than the above	String object containing the retrieval result in character string representation
DECIMAL	Null value	null
	Other than the above	String object containing the retrieval result in character string representation
DOUBLE PRECISION	Null value	null
	Other than the above	String object containing the retrieval result in character string representation
DATE	Null value	null
	Other than the above	String object of a character string in YYYY-MM-DD format
TIME	Null value	null
	Other than the above	String object of a character string in hh:mm:ss[.f...] format
TIMESTAMP	Null value	null
	Other than the above	String object of a character string in YYYY-MM-DDΔhh:mm:ss[.f...] format (Δ indicates a space)
BINARY VARBINARY	Null value	null
	Other than the above	retrieval-result
BOOLEAN#	Null value	null
	true	String object of the character string "true"
	false	String object of the character string "false"

#

BOOLEAN-type data exists when the ResultSet object was created from DatabaseMetadata.

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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.

• Encoding failed.

• The data type cannot be acquired by this method.

• An error occurred in the JDBC driver.

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