11.2.10 isSigned(int param)

(1) Function

This method returns a value indicating whether a specified parameter is for signed numeric values.

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(2) Format

public synchronized boolean isSigned(int param) throws SQLException

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(3) Arguments

int param

Specifies a parameter number (beginning with 1).

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(4) Return value

The method returns one of the following values:

• true: The parameter is for signed numeric values.

• false: The parameter is not for signed numeric values.

The following table shows the relationship between the parameter's data type and the return value.

Table 11‒7: Relationship between the parameter's data type and the return value

Parameter's data type	Return value
INTEGER, SMALLINT, DOUBLE PRECISION, DECIMAL	true
Other than the above	false

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(5) Exceptions

If the specified param value is 0 or less, or is greater than the number of parameters, the JDBC driver throws an SQLException.

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