8.7.21 isSigned(int column)
- Organization of this subsection
(1) Function
This method returns a value indicating whether a specified column is for signed numeric values.
(2) Format
public synchronized boolean isSigned(int column) throws SQLException
(3) Arguments
- int column
-
Specifies a column number (where the first column is 1).
(4) Return value
The method returns one of the following values:
- true
-
The column is for signed numeric values.
- false
-
The column is not for signed numeric values.
The following table shows the return value depending on the parameter's data type.
|
Parameter's data type |
Return value |
|---|---|
|
INTEGER, SMALLINT, DOUBLE PRECISION, DECIMAL |
true |
|
Other |
false |
(5) Exceptions
If the specified column value is 0 or less, or is greater than the number of columns in the table, the JDBC driver throws an SQLException.