Wrapperpublic interface ParameterMetaData extends Wrapper
PreparedStatement object. For some queries and driver implementations, the data that would be returned by a ParameterMetaData object may not be available until the PreparedStatement has been executed. Some driver implementations may not be able to provide information about the types and properties for each parameter marker in a CallableStatement object.
| Modifier and Type | Field | Description |
|---|---|---|
static final int |
parameterModeIn |
The constant indicating that the parameter's mode is IN. |
static final int |
parameterModeInOut |
The constant indicating that the parameter's mode is INOUT. |
static final int |
parameterModeOut |
The constant indicating that the parameter's mode is OUT. |
static final int |
parameterModeUnknown |
The constant indicating that the mode of the parameter is unknown. |
static final int |
parameterNoNulls |
The constant indicating that a parameter will not allow NULL values. |
static final int |
parameterNullable |
The constant indicating that a parameter will allow NULL values. |
static final int |
parameterNullableUnknown |
The constant indicating that the nullability of a parameter is unknown. |
| Modifier and Type | Method | Description |
|---|---|---|
String |
getParameterClassName |
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 |
Retrieves the designated parameter's mode. |
int |
getParameterType |
Retrieves the designated parameter's SQL type. |
String |
getParameterTypeName |
Retrieves the designated parameter's database-specific type name. |
int |
getPrecision |
Retrieves the designated parameter's specified column size. |
int |
getScale |
Retrieves the designated parameter's number of digits to right of the decimal point. 0 is returned for data types where the scale is not applicable. |
int |
isNullable |
Retrieves whether null values are allowed in the designated parameter. |
boolean |
isSigned |
Retrieves whether values for the designated parameter can be signed numbers. |
isWrapperFor, unwrap
static final int parameterNoNulls
NULL values.static final int parameterNullable
NULL values.static final int parameterNullableUnknown
static final int parameterModeUnknown
static final int parameterModeIn
static final int parameterModeInOut
static final int parameterModeOut
int getParameterCount() throws SQLException
PreparedStatement object for which this ParameterMetaData object contains information.SQLException - if a database access error occursint isNullable(int param) throws SQLException
param - the first parameter is 1, the second is 2, ...ParameterMetaData.parameterNoNulls, ParameterMetaData.parameterNullable, or ParameterMetaData.parameterNullableUnknown
SQLException - if a database access error occursboolean isSigned(int param) throws SQLException
param - the first parameter is 1, the second is 2, ...true if so; false otherwiseSQLException - if a database access error occursint getPrecision(int param) throws SQLException
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.
param - the first parameter is 1, the second is 2, ...SQLException - if a database access error occursint getScale(int param) throws SQLException
param - the first parameter is 1, the second is 2, ...SQLException - if a database access error occursint getParameterType(int param) throws SQLException
param - the first parameter is 1, the second is 2, ...java.sql.Types
SQLException - if a database access error occursString getParameterTypeName(int param) throws SQLException
param - the first parameter is 1, the second is 2, ...SQLException - if a database access error occursString getParameterClassName(int param) throws SQLException
PreparedStatement.setObject.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 occursint getParameterMode(int param) throws SQLException
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 occurs
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https://docs.oracle.com/en/java/javase/21/docs/api/java.sql/java/sql/ParameterMetaData.html