public class PgParameterMetaData extends Object implements ParameterMetaData
parameterModeIn, parameterModeInOut, parameterModeOut, parameterModeUnknown, parameterNoNulls, parameterNullable, parameterNullableUnknown
Constructor and Description |
---|
PgParameterMetaData(BaseConnection connection,
int[] oids) |
Modifier and Type | Method and Description |
---|---|
String |
getParameterClassName(int param)
Retrieves the fully-qualified name of the Java class whose instances
should be passed to the method
PreparedStatement.setObject . |
int |
getParameterCount()
Retrieves the number of parameters in the
PreparedStatement
object for which this ParameterMetaData object contains
information. |
int |
getParameterMode(int param)
Retrieves the designated parameter's mode.
|
int |
getParameterType(int param)
Retrieves the designated parameter's SQL type.
|
String |
getParameterTypeName(int param)
Retrieves the designated parameter's database-specific type name.
|
int |
getPrecision(int param)
Retrieves the designated parameter's specified column size.
|
int |
getScale(int param)
Retrieves the designated parameter's number of digits to right of the decimal point.
|
int |
isNullable(int param)
Retrieves whether null values are allowed in the designated parameter.
|
boolean |
isSigned(int param)
Retrieves whether values for the designated parameter can be signed numbers.
|
boolean |
isWrapperFor(Class<?> iface)
Returns true if this either implements the interface argument or is directly or indirectly a wrapper
for an object that does.
|
<T> T |
unwrap(Class<T> iface)
Returns an object that implements the given interface to allow access to
non-standard methods, or standard methods not exposed by the proxy.
|
public PgParameterMetaData(BaseConnection connection, int[] oids)
public String getParameterClassName(int param) throws SQLException
java.sql.ParameterMetaData
PreparedStatement.setObject
.getParameterClassName
in interface ParameterMetaData
param
- the first parameter is 1, the second is 2, ...PreparedStatement.setObject
to set the value
in the specified parameter. This is the class name used
for custom mapping.SQLException
- if a database access error occurspublic int getParameterCount()
java.sql.ParameterMetaData
PreparedStatement
object for which this ParameterMetaData
object contains
information.getParameterCount
in interface ParameterMetaData
public int getParameterMode(int param) throws SQLException
getParameterMode
in interface ParameterMetaData
param
- the first parameter is 1, the second is 2, ...ParameterMetaData.parameterModeIn
,
ParameterMetaData.parameterModeOut
, or
ParameterMetaData.parameterModeInOut
ParameterMetaData.parameterModeUnknown
.SQLException
- if a database access error occurspublic int getParameterType(int param) throws SQLException
java.sql.ParameterMetaData
getParameterType
in interface ParameterMetaData
param
- the first parameter is 1, the second is 2, ...java.sql.Types
SQLException
- if a database access error occursTypes
public String getParameterTypeName(int param) throws SQLException
java.sql.ParameterMetaData
getParameterTypeName
in interface ParameterMetaData
param
- the first parameter is 1, the second is 2, ...SQLException
- if a database access error occurspublic int getPrecision(int param) throws SQLException
java.sql.ParameterMetaData
The returned value represents the maximum column size for the given parameter. For numeric data, this is the maximum precision. For character data, this is the length in characters. For datetime datatypes, this is the length in characters of the String representation (assuming the maximum allowed precision of the fractional seconds component). For binary data, this is the length in bytes. For the ROWID datatype, this is the length in bytes. 0 is returned for data types where the column size is not applicable.
getPrecision
in interface ParameterMetaData
param
- the first parameter is 1, the second is 2, ...SQLException
- if a database access error occurspublic int getScale(int param) throws SQLException
java.sql.ParameterMetaData
getScale
in interface ParameterMetaData
param
- the first parameter is 1, the second is 2, ...SQLException
- if a database access error occurspublic int isNullable(int param) throws SQLException
java.sql.ParameterMetaData
isNullable
in interface ParameterMetaData
param
- the first parameter is 1, the second is 2, ...ParameterMetaData.parameterNoNulls
,
ParameterMetaData.parameterNullable
, or
ParameterMetaData.parameterNullableUnknown
SQLException
- if a database access error occurspublic boolean isSigned(int param) throws SQLException
isSigned
in interface ParameterMetaData
param
- the first parameter is 1, the second is 2, ...true
if so; false
otherwiseSQLException
- if a database access error occurspublic boolean isWrapperFor(Class<?> iface) throws SQLException
java.sql.Wrapper
isWrapperFor
on the wrapped
object. If this does not implement the interface and is not a wrapper, return false.
This method should be implemented as a low-cost operation compared to unwrap
so that
callers can use this method to avoid expensive unwrap
calls that may fail. If this method
returns true then calling unwrap
with the same argument should succeed.isWrapperFor
in interface Wrapper
iface
- a Class defining an interface.SQLException
- if an error occurs while determining whether this is a wrapper
for an object with the given interface.public <T> T unwrap(Class<T> iface) throws SQLException
java.sql.Wrapper
unwrap
recursively on the wrapped object
or a proxy for that result. If the receiver is not a
wrapper and does not implement the interface, then an SQLException
is thrown.unwrap
in interface Wrapper
T
- the type of the class modeled by this Class objectiface
- A Class defining an interface that the result must implement.SQLException
- If no object found that implements the interfaceCopyright © 2019 PostgreSQL Global Development Group. All rights reserved.