public interface ParameterMetaData extends Wrapper
An object that can be used to get information about the types and properties for each parameter marker in a 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.
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.
static final int parameterModeUnknown
The constant indicating that the mode of the parameter is unknown.
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.
int getParameterCount()
throws SQLException Retrieves the number of parameters in the PreparedStatement object for which this ParameterMetaData object contains information.
SQLException - if a database access error occursint isNullable(int param)
throws SQLException Retrieves whether null values are allowed in the designated parameter.
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 Retrieves whether values for the designated parameter can be signed numbers.
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 Retrieves the designated parameter's specified column size.
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 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.
param - the first parameter is 1, the second is 2, ...SQLException - if a database access error occursint getParameterType(int param)
throws SQLException Retrieves the designated parameter's SQL type.
param - the first parameter is 1, the second is 2, ...java.sql.Types
SQLException - if a database access error occursTypesString getParameterTypeName(int param)
throws SQLException Retrieves the designated parameter's database-specific type name.
param - the first parameter is 1, the second is 2, ...SQLException - if a database access error occursString getParameterClassName(int param)
throws SQLException Retrieves the fully-qualified name of the Java class whose instances should be passed to the method 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 Retrieves the designated parameter's mode.
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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