MySQL Connector/J 9.2.0 · com.mysql.cj.jdbc.result.ResultSetMetaData

Modifier and Type	Field and Description
private ExceptionInterceptor	exceptionInterceptor
private Field[]	fields
private Session	session
pack-priv boolean	treatYearAsDate
pack-priv boolean	useOldAliasBehavior

Access	Constructor and Description
public	ResultSetMetaData(Session this `Session` session, Field[] the array of field descriptors fields, boolean 'useOldAliasMetadataBehavior' property value useOldAliasBehavior, boolean 'yearIsDateType' property value treatYearAsDate, ExceptionInterceptor exception interceptor exceptionInterceptor) Initialize for a result with a tuple set and a field descriptor set

Method Summary

Modifier and Type	Method and Description
private static int	clampedGetLength(Field f)
public String	getCatalogName(int the first column is 1, the second is 2, ... column) Implements java.sql.ResultSetMetaData.getCatalogName. Gets the designated column's table's catalog name.
public String	Returns: the Java character encoding name for the given column, or null if no Java character encoding maps to the MySQL character set for the given column. getColumnCharacterEncoding(int the first column is 1, the second is 2, etc. column) What's the Java character encoding name for the given column?
public String	Returns: the MySQL character set name for the given column getColumnCharacterSet(int the first column is 1, the second is 2, etc. column) What's the MySQL character set name for the given column?
public String	getColumnClassName(int the first column is 1, the second is 2, ... column) Implements java.sql.ResultSetMetaData.getColumnClassName. Returns the fully-qualified name of the Java class whose instances are manufactured if the method `ResultSet.getObject` is called to retrieve a value from the column.
public int	getColumnCount() Implements java.sql.ResultSetMetaData.getColumnCount. Returns the number of columns in this `ResultSet` object.
public int	getColumnDisplaySize(int the first column is 1, the second is 2, ... column) Implements java.sql.ResultSetMetaData.getColumnDisplaySize. Indicates the designated column's normal maximum width in characters.
public String	getColumnLabel(int the first column is 1, the second is 2, ... column) Implements java.sql.ResultSetMetaData.getColumnLabel. Gets the designated column's suggested title for use in printouts and displays.
public String	getColumnName(int the first column is 1, the second is 2, ... column) Implements java.sql.ResultSetMetaData.getColumnName. Get the designated column's name.
public int	getColumnType(int the first column is 1, the second is 2, ... column) Implements java.sql.ResultSetMetaData.getColumnType. Retrieves the designated column's SQL type.
public String	getColumnTypeName(int the first column is 1, the second is 2, ... column) Implements java.sql.ResultSetMetaData.getColumnTypeName. Retrieves the designated column's database-specific type name.
protected Field	Returns: the field instance for the given column index getField(int the column number to retrieve a field instance for columnIndex) Returns the field instance for the given column index
public Field[]	getFields()
public int	getPrecision(int the first column is 1, the second is 2, ... column) Implements java.sql.ResultSetMetaData.getPrecision. Get the designated column's specified column size.
public int	getScale(int the first column is 1, the second is 2, ... column) Implements java.sql.ResultSetMetaData.getScale. Gets the designated column's number of digits to right of the decimal point.
public String	getSchemaName(int the first column is 1, the second is 2, ... column) Implements java.sql.ResultSetMetaData.getSchemaName. Get the designated column's table's schema.
public String	getTableName(int the first column is 1, the second is 2, ... column) Implements java.sql.ResultSetMetaData.getTableName. Gets the designated column's table name.
public boolean	isAutoIncrement(int the first column is 1, the second is 2, ... column) Implements java.sql.ResultSetMetaData.isAutoIncrement. Indicates whether the designated column is automatically numbered.
public boolean	isCaseSensitive(int the first column is 1, the second is 2, ... column) Implements java.sql.ResultSetMetaData.isCaseSensitive. Indicates whether a column's case matters.
public boolean	isCurrency(int the first column is 1, the second is 2, ... column) Implements java.sql.ResultSetMetaData.isCurrency. Indicates whether the designated column is a cash value.
public boolean	isDefinitelyWritable(int the first column is 1, the second is 2, ... column) Implements java.sql.ResultSetMetaData.isDefinitelyWritable. Indicates whether a write on the designated column will definitely succeed.
public int	isNullable(int the first column is 1, the second is 2, ... column) Implements java.sql.ResultSetMetaData.isNullable. Indicates the nullability of values in the designated column.
public boolean	isReadOnly(int the first column is 1, the second is 2, ... column) Implements java.sql.ResultSetMetaData.isReadOnly. Indicates whether the designated column is definitely not writable.
public boolean	isSearchable(int the first column is 1, the second is 2, ... column) Implements java.sql.ResultSetMetaData.isSearchable. Indicates whether the designated column can be used in a where clause.
public boolean	isSigned(int the first column is 1, the second is 2, ... column) Implements java.sql.ResultSetMetaData.isSigned. Indicates whether values in the designated column are signed numbers.
public boolean	isWrapperFor(Class<?> a Class defining an interface. iface) Implements java.sql.Wrapper.isWrapperFor. Returns true if this either implements the interface argument or is directly or indirectly a wrapper for an object that does.
public boolean	isWritable(int the first column is 1, the second is 2, ... column) Implements java.sql.ResultSetMetaData.isWritable. Indicates whether it is possible for a write on the designated column to succeed.
public String	toString() Overrides java.lang.Object.toString. Returns a string representation of the object.
public <T> T	unwrap(Class<T> A Class defining an interface that the result must implement. iface) Implements java.sql.Wrapper.unwrap. Returns an object that implements the given interface to allow access to non-standard methods, or standard methods not exposed by the proxy.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll wait wait wait

exceptionInterceptor	back to summary
private ExceptionInterceptor exceptionInterceptor

fields	back to summary
private Field[] fields

session	back to summary
private Session session

treatYearAsDate	back to summary
pack-priv boolean treatYearAsDate

useOldAliasBehavior	back to summary
pack-priv boolean useOldAliasBehavior

Method Detail

clampedGetLength	back to summary
private static int clampedGetLength(Field f)

getCatalogName	back to summary
public String getCatalogName(int column) throws SQLException Implements java.sql.ResultSetMetaData.getCatalogName. Doc from java.sql.ResultSetMetaData.getCatalogName. Gets the designated column's table's catalog name. Parameters column:int the first column is 1, the second is 2, ... Returns:String the name of the catalog for the table in which the given column appears or "" if not applicable Annotations @Override Exceptions SQLException: if a database access error occurs

getCatalogName

back to summary

public String getCatalogName(int column) throws SQLException

Implements java.sql.ResultSetMetaData.getCatalogName.

Doc from java.sql.ResultSetMetaData.getCatalogName.

Gets the designated column's table's catalog name.

Parameters

column:int: the first column is 1, the second is 2, ...

Returns:String

the name of the catalog for the table in which the given column appears or "" if not applicable

Annotations

@Override

Exceptions

SQLException:: if a database access error occurs

getColumnCharacterEncoding	back to summary
public String getColumnCharacterEncoding(int column) throws SQLException What's the Java character encoding name for the given column? Parameters column:int the first column is 1, the second is 2, etc. Returns:String the Java character encoding name for the given column, or null if no Java character encoding maps to the MySQL character set for the given column. Exceptions SQLException: if an invalid column index is given.

getColumnCharacterEncoding

back to summary

public String getColumnCharacterEncoding(int column) throws SQLException

What's the Java character encoding name for the given column?

Parameters

column:int: the first column is 1, the second is 2, etc.

Returns:String

the Java character encoding name for the given column, or null if no Java character encoding maps to the MySQL character set for the given column.

Exceptions

SQLException:: if an invalid column index is given.

getColumnCharacterSet	back to summary
public String getColumnCharacterSet(int column) throws SQLException What's the MySQL character set name for the given column? Parameters column:int the first column is 1, the second is 2, etc. Returns:String the MySQL character set name for the given column Exceptions SQLException: if an invalid column index is given.

getColumnCharacterSet

back to summary

public String getColumnCharacterSet(int column) throws SQLException

What's the MySQL character set name for the given column?

Parameters

column:int: the first column is 1, the second is 2, etc.

Returns:String

the MySQL character set name for the given column

Exceptions

SQLException:: if an invalid column index is given.

getColumnClassName back to summary

getColumnClassName	back to summary
public String getColumnClassName(int column) throws SQLException Implements java.sql.ResultSetMetaData.getColumnClassName. Doc from java.sql.ResultSetMetaData.getColumnClassName. Returns the fully-qualified name of the Java class whose instances are manufactured if the method `ResultSet.getObject` is called to retrieve a value from the column. `ResultSet.getObject` may return a subclass of the class returned by this method. Parameters column:int the first column is 1, the second is 2, ... Returns:String the fully-qualified name of the class in the Java programming language that would be used by the method `ResultSet.getObject` to retrieve the value in the specified column. This is the class name used for custom mapping. Annotations @Override Exceptions SQLException: if a database access error occurs

public String getColumnClassName(int column) throws SQLException

Implements java.sql.ResultSetMetaData.getColumnClassName.

Doc from java.sql.ResultSetMetaData.getColumnClassName.

Returns the fully-qualified name of the Java class whose instances are manufactured if the method ResultSet.getObject is called to retrieve a value from the column. ResultSet.getObject may return a subclass of the class returned by this method.

Parameters

column:int: the first column is 1, the second is 2, ...

Returns:String

the fully-qualified name of the class in the Java programming language that would be used by the method ResultSet.getObject to retrieve the value in the specified column. This is the class name used for custom mapping.

Annotations

@Override

Exceptions

SQLException:: if a database access error occurs

getColumnCount back to summary

getColumnCount	back to summary
public int getColumnCount() throws SQLException Implements java.sql.ResultSetMetaData.getColumnCount. Doc from java.sql.ResultSetMetaData.getColumnCount. Returns the number of columns in this `ResultSet` object. Returns:int the number of columns Annotations @Override Exceptions SQLException: if a database access error occurs

public int getColumnCount() throws SQLException

Implements java.sql.ResultSetMetaData.getColumnCount.

Doc from java.sql.ResultSetMetaData.getColumnCount.

Returns the number of columns in this ResultSet object.

Returns:int

the number of columns

Annotations

@Override

Exceptions

SQLException:: if a database access error occurs

getColumnDisplaySize	back to summary
public int getColumnDisplaySize(int column) throws SQLException Implements java.sql.ResultSetMetaData.getColumnDisplaySize. Doc from java.sql.ResultSetMetaData.getColumnDisplaySize. Indicates the designated column's normal maximum width in characters. Parameters column:int the first column is 1, the second is 2, ... Returns:int the normal maximum number of characters allowed as the width of the designated column Annotations @Override Exceptions SQLException: if a database access error occurs

getColumnDisplaySize

back to summary

public int getColumnDisplaySize(int column) throws SQLException

Implements java.sql.ResultSetMetaData.getColumnDisplaySize.

Doc from java.sql.ResultSetMetaData.getColumnDisplaySize.

Indicates the designated column's normal maximum width in characters.

Parameters

column:int: the first column is 1, the second is 2, ...

Returns:int

the normal maximum number of characters allowed as the width of the designated column

Annotations

@Override

Exceptions

SQLException:: if a database access error occurs

getColumnLabel back to summary

getColumnLabel	back to summary
public String getColumnLabel(int column) throws SQLException Implements java.sql.ResultSetMetaData.getColumnLabel. Doc from java.sql.ResultSetMetaData.getColumnLabel. Gets the designated column's suggested title for use in printouts and displays. The suggested title is usually specified by the SQL `AS` clause. If a SQL `AS` is not specified, the value returned from `getColumnLabel` will be the same as the value returned by the `getColumnName` method. Parameters column:int the first column is 1, the second is 2, ... Returns:String the suggested column title Annotations @Override Exceptions SQLException: if a database access error occurs

public String getColumnLabel(int column) throws SQLException

Implements java.sql.ResultSetMetaData.getColumnLabel.

Doc from java.sql.ResultSetMetaData.getColumnLabel.

Gets the designated column's suggested title for use in printouts and displays. The suggested title is usually specified by the SQL AS clause. If a SQL AS is not specified, the value returned from getColumnLabel will be the same as the value returned by the getColumnName method.

Parameters

column:int: the first column is 1, the second is 2, ...

Returns:String

the suggested column title

Annotations

@Override

Exceptions

SQLException:: if a database access error occurs

getColumnName	back to summary
public String getColumnName(int column) throws SQLException Implements java.sql.ResultSetMetaData.getColumnName. Doc from java.sql.ResultSetMetaData.getColumnName. Get the designated column's name. Parameters column:int the first column is 1, the second is 2, ... Returns:String column name Annotations @Override Exceptions SQLException: if a database access error occurs

getColumnName

back to summary

public String getColumnName(int column) throws SQLException

Implements java.sql.ResultSetMetaData.getColumnName.

Doc from java.sql.ResultSetMetaData.getColumnName.

Get the designated column's name.

Parameters

column:int: the first column is 1, the second is 2, ...

Returns:String

column name

Annotations

@Override

Exceptions

SQLException:: if a database access error occurs

getColumnType	back to summary
public int getColumnType(int column) throws SQLException Implements java.sql.ResultSetMetaData.getColumnType. Doc from java.sql.ResultSetMetaData.getColumnType. Retrieves the designated column's SQL type. Parameters column:int the first column is 1, the second is 2, ... Returns:int SQL type from java.sql.Types Annotations @Override Exceptions SQLException: if a database access error occurs

getColumnType

back to summary

public int getColumnType(int column) throws SQLException

Implements java.sql.ResultSetMetaData.getColumnType.

Doc from java.sql.ResultSetMetaData.getColumnType.

Retrieves the designated column's SQL type.

Parameters

column:int: the first column is 1, the second is 2, ...

Returns:int

SQL type from java.sql.Types

Annotations

@Override

Exceptions

SQLException:: if a database access error occurs

getColumnTypeName	back to summary
public String getColumnTypeName(int column) throws SQLException Implements java.sql.ResultSetMetaData.getColumnTypeName. Doc from java.sql.ResultSetMetaData.getColumnTypeName. Retrieves the designated column's database-specific type name. Parameters column:int the first column is 1, the second is 2, ... Returns:String type name used by the database. If the column type is a user-defined type, then a fully-qualified type name is returned. Annotations @Override Exceptions SQLException: if a database access error occurs

getColumnTypeName

back to summary

public String getColumnTypeName(int column) throws SQLException

Implements java.sql.ResultSetMetaData.getColumnTypeName.

Doc from java.sql.ResultSetMetaData.getColumnTypeName.

Retrieves the designated column's database-specific type name.

Parameters

column:int: the first column is 1, the second is 2, ...

Returns:String

type name used by the database. If the column type is a user-defined type, then a fully-qualified type name is returned.

Annotations

@Override

Exceptions

SQLException:: if a database access error occurs

getField	back to summary
protected Field getField(int columnIndex) throws SQLException Returns the field instance for the given column index Parameters columnIndex:int the column number to retrieve a field instance for Returns:Field the field instance for the given column index Exceptions SQLException: if an error occurs

getField

back to summary

protected Field getField(int columnIndex) throws SQLException

Returns the field instance for the given column index

Parameters

columnIndex:int: the column number to retrieve a field instance for

Returns:Field

the field instance for the given column index

Exceptions

SQLException:: if an error occurs

getFields	back to summary
public Field[] getFields()

getPrecision	back to summary
public int getPrecision(int column) throws SQLException Implements java.sql.ResultSetMetaData.getPrecision. Doc from java.sql.ResultSetMetaData.getPrecision. Get the designated column's specified column size. 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. Parameters column:int the first column is 1, the second is 2, ... Returns:int precision Annotations @Override Exceptions SQLException: if a database access error occurs

getPrecision

back to summary

public int getPrecision(int column) throws SQLException

Implements java.sql.ResultSetMetaData.getPrecision.

Doc from java.sql.ResultSetMetaData.getPrecision.

Get the designated column's specified column size. 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.

Parameters

column:int: the first column is 1, the second is 2, ...

Returns:int

precision

Annotations

@Override

Exceptions

SQLException:: if a database access error occurs

getScale	back to summary
public int getScale(int column) throws SQLException Implements java.sql.ResultSetMetaData.getScale. Doc from java.sql.ResultSetMetaData.getScale. Gets the designated column's number of digits to right of the decimal point. 0 is returned for data types where the scale is not applicable. Parameters column:int the first column is 1, the second is 2, ... Returns:int scale Annotations @Override Exceptions SQLException: if a database access error occurs

getScale

back to summary

public int getScale(int column) throws SQLException

Implements java.sql.ResultSetMetaData.getScale.

Doc from java.sql.ResultSetMetaData.getScale.

Gets the designated column's number of digits to right of the decimal point. 0 is returned for data types where the scale is not applicable.

Parameters

column:int: the first column is 1, the second is 2, ...

Returns:int

scale

Annotations

@Override

Exceptions

SQLException:: if a database access error occurs

getSchemaName	back to summary
public String getSchemaName(int column) throws SQLException Implements java.sql.ResultSetMetaData.getSchemaName. Doc from java.sql.ResultSetMetaData.getSchemaName. Get the designated column's table's schema. Parameters column:int the first column is 1, the second is 2, ... Returns:String schema name or "" if not applicable Annotations @Override Exceptions SQLException: if a database access error occurs

getSchemaName

back to summary

public String getSchemaName(int column) throws SQLException

Implements java.sql.ResultSetMetaData.getSchemaName.

Doc from java.sql.ResultSetMetaData.getSchemaName.

Get the designated column's table's schema.

Parameters

column:int: the first column is 1, the second is 2, ...

Returns:String

schema name or "" if not applicable

Annotations

@Override

Exceptions

SQLException:: if a database access error occurs

getTableName	back to summary
public String getTableName(int column) throws SQLException Implements java.sql.ResultSetMetaData.getTableName. Doc from java.sql.ResultSetMetaData.getTableName. Gets the designated column's table name. Parameters column:int the first column is 1, the second is 2, ... Returns:String table name or "" if not applicable Annotations @Override Exceptions SQLException: if a database access error occurs

getTableName

back to summary

public String getTableName(int column) throws SQLException

Implements java.sql.ResultSetMetaData.getTableName.

Doc from java.sql.ResultSetMetaData.getTableName.

Gets the designated column's table name.

Parameters

column:int: the first column is 1, the second is 2, ...

Returns:String

table name or "" if not applicable

Annotations

@Override

Exceptions

SQLException:: if a database access error occurs

isAutoIncrement back to summary

isAutoIncrement	back to summary
public boolean isAutoIncrement(int column) throws SQLException Implements java.sql.ResultSetMetaData.isAutoIncrement. Doc from java.sql.ResultSetMetaData.isAutoIncrement. Indicates whether the designated column is automatically numbered. Parameters column:int the first column is 1, the second is 2, ... Returns:boolean `true` if so; `false` otherwise Annotations @Override Exceptions SQLException: if a database access error occurs

public boolean isAutoIncrement(int column) throws SQLException

Implements java.sql.ResultSetMetaData.isAutoIncrement.

Doc from java.sql.ResultSetMetaData.isAutoIncrement.

Indicates whether the designated column is automatically numbered.

Parameters

column:int: the first column is 1, the second is 2, ...

Returns:boolean

true if so; false otherwise

Annotations

@Override

Exceptions

SQLException:: if a database access error occurs

isCaseSensitive back to summary

isCaseSensitive	back to summary
public boolean isCaseSensitive(int column) throws SQLException Implements java.sql.ResultSetMetaData.isCaseSensitive. Doc from java.sql.ResultSetMetaData.isCaseSensitive. Indicates whether a column's case matters. Parameters column:int the first column is 1, the second is 2, ... Returns:boolean `true` if so; `false` otherwise Annotations @Override Exceptions SQLException: if a database access error occurs

public boolean isCaseSensitive(int column) throws SQLException

Implements java.sql.ResultSetMetaData.isCaseSensitive.

Doc from java.sql.ResultSetMetaData.isCaseSensitive.

Indicates whether a column's case matters.

Parameters

column:int: the first column is 1, the second is 2, ...

Returns:boolean

true if so; false otherwise

Annotations

@Override

Exceptions

SQLException:: if a database access error occurs

isCurrency back to summary

isCurrency	back to summary
public boolean isCurrency(int column) throws SQLException Implements java.sql.ResultSetMetaData.isCurrency. Doc from java.sql.ResultSetMetaData.isCurrency. Indicates whether the designated column is a cash value. Parameters column:int the first column is 1, the second is 2, ... Returns:boolean `true` if so; `false` otherwise Annotations @Override Exceptions SQLException: if a database access error occurs

public boolean isCurrency(int column) throws SQLException

Implements java.sql.ResultSetMetaData.isCurrency.

Doc from java.sql.ResultSetMetaData.isCurrency.

Indicates whether the designated column is a cash value.

Parameters

column:int: the first column is 1, the second is 2, ...

Returns:boolean

true if so; false otherwise

Annotations

@Override

Exceptions

SQLException:: if a database access error occurs

isDefinitelyWritable back to summary

isDefinitelyWritable	back to summary
public boolean isDefinitelyWritable(int column) throws SQLException Implements java.sql.ResultSetMetaData.isDefinitelyWritable. Doc from java.sql.ResultSetMetaData.isDefinitelyWritable. Indicates whether a write on the designated column will definitely succeed. Parameters column:int the first column is 1, the second is 2, ... Returns:boolean `true` if so; `false` otherwise Annotations @Override Exceptions SQLException: if a database access error occurs

public boolean isDefinitelyWritable(int column) throws SQLException

Implements java.sql.ResultSetMetaData.isDefinitelyWritable.

Doc from java.sql.ResultSetMetaData.isDefinitelyWritable.

Indicates whether a write on the designated column will definitely succeed.

Parameters

column:int: the first column is 1, the second is 2, ...

Returns:boolean

true if so; false otherwise

Annotations

@Override

Exceptions

SQLException:: if a database access error occurs

isNullable back to summary

isNullable	back to summary
public int isNullable(int column) throws SQLException Implements java.sql.ResultSetMetaData.isNullable. Doc from java.sql.ResultSetMetaData.isNullable. Indicates the nullability of values in the designated column. Parameters column:int the first column is 1, the second is 2, ... Returns:int the nullability status of the given column; one of `columnNoNulls`, `columnNullable` or `columnNullableUnknown` Annotations @Override Exceptions SQLException: if a database access error occurs

public int isNullable(int column) throws SQLException

Implements java.sql.ResultSetMetaData.isNullable.

Doc from java.sql.ResultSetMetaData.isNullable.

Indicates the nullability of values in the designated column.

Parameters

column:int: the first column is 1, the second is 2, ...

Returns:int

the nullability status of the given column; one of columnNoNulls, columnNullable or columnNullableUnknown

Annotations

@Override

Exceptions

SQLException:: if a database access error occurs

isReadOnly back to summary

isReadOnly	back to summary
public boolean isReadOnly(int column) throws SQLException Implements java.sql.ResultSetMetaData.isReadOnly. Doc from java.sql.ResultSetMetaData.isReadOnly. Indicates whether the designated column is definitely not writable. Parameters column:int the first column is 1, the second is 2, ... Returns:boolean `true` if so; `false` otherwise Annotations @Override Exceptions SQLException: if a database access error occurs

public boolean isReadOnly(int column) throws SQLException

Implements java.sql.ResultSetMetaData.isReadOnly.

Doc from java.sql.ResultSetMetaData.isReadOnly.

Indicates whether the designated column is definitely not writable.

Parameters

column:int: the first column is 1, the second is 2, ...

Returns:boolean

true if so; false otherwise

Annotations

@Override

Exceptions

SQLException:: if a database access error occurs

isSearchable back to summary

isSearchable	back to summary
public boolean isSearchable(int column) throws SQLException Implements java.sql.ResultSetMetaData.isSearchable. Doc from java.sql.ResultSetMetaData.isSearchable. Indicates whether the designated column can be used in a where clause. Parameters column:int the first column is 1, the second is 2, ... Returns:boolean `true` if so; `false` otherwise Annotations @Override Exceptions SQLException: if a database access error occurs

public boolean isSearchable(int column) throws SQLException

Implements java.sql.ResultSetMetaData.isSearchable.

Doc from java.sql.ResultSetMetaData.isSearchable.

Indicates whether the designated column can be used in a where clause.

Parameters

column:int: the first column is 1, the second is 2, ...

Returns:boolean

true if so; false otherwise

Annotations

@Override

Exceptions

SQLException:: if a database access error occurs

isSigned back to summary

isSigned	back to summary
public boolean isSigned(int column) throws SQLException Implements java.sql.ResultSetMetaData.isSigned. Doc from java.sql.ResultSetMetaData.isSigned. Indicates whether values in the designated column are signed numbers. Parameters column:int the first column is 1, the second is 2, ... Returns:boolean `true` if so; `false` otherwise Annotations @Override Exceptions SQLException: if a database access error occurs

public boolean isSigned(int column) throws SQLException

Implements java.sql.ResultSetMetaData.isSigned.

Doc from java.sql.ResultSetMetaData.isSigned.

Indicates whether values in the designated column are signed numbers.

Parameters

column:int: the first column is 1, the second is 2, ...

Returns:boolean

true if so; false otherwise

Annotations

@Override

Exceptions

SQLException:: if a database access error occurs

isWrapperFor back to summary

isWrapperFor	back to summary
public boolean isWrapperFor(Class<?> iface) throws SQLException Implements java.sql.Wrapper.isWrapperFor. Doc from java.sql.Wrapper.isWrapperFor. Returns true if this either implements the interface argument or is directly or indirectly a wrapper for an object that does. Returns false otherwise. If this implements the interface then return true, else if this is a wrapper then return the result of recursively calling `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. Parameters iface:Class<?> a Class defining an interface. Returns:boolean true if this implements the interface or directly or indirectly wraps an object that does. Annotations @Override Exceptions SQLException: if an error occurs while determining whether this is a wrapper for an object with the given interface.

public boolean isWrapperFor(Class<?> iface) throws SQLException

Implements java.sql.Wrapper.isWrapperFor.

Doc from java.sql.Wrapper.isWrapperFor.

Returns true if this either implements the interface argument or is directly or indirectly a wrapper for an object that does. Returns false otherwise. If this implements the interface then return true, else if this is a wrapper then return the result of recursively calling 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.

Parameters

iface:Class<?>: a Class defining an interface.

Returns:boolean

true if this implements the interface or directly or indirectly wraps an object that does.

Annotations

@Override

Exceptions

SQLException:: if an error occurs while determining whether this is a wrapper for an object with the given interface.

isWritable back to summary

isWritable	back to summary
public boolean isWritable(int column) throws SQLException Implements java.sql.ResultSetMetaData.isWritable. Doc from java.sql.ResultSetMetaData.isWritable. Indicates whether it is possible for a write on the designated column to succeed. Parameters column:int the first column is 1, the second is 2, ... Returns:boolean `true` if so; `false` otherwise Annotations @Override Exceptions SQLException: if a database access error occurs

public boolean isWritable(int column) throws SQLException

Implements java.sql.ResultSetMetaData.isWritable.

Doc from java.sql.ResultSetMetaData.isWritable.

Indicates whether it is possible for a write on the designated column to succeed.

Parameters

column:int: the first column is 1, the second is 2, ...

Returns:boolean

true if so; false otherwise

Annotations

@Override

Exceptions

SQLException:: if a database access error occurs

toString back to summary

toString	back to summary
public String toString() Overrides java.lang.Object.toString. Doc from java.lang.Object.toString. Returns a string representation of the object. Satisfying this method's contract implies a non-`null` result must be returned. Returns:String a string representation of the object Annotations @Override

public String toString()

Overrides java.lang.Object.toString.

Doc from java.lang.Object.toString.

Returns a string representation of the object. Satisfying this method's contract implies a non-null result must be returned.

Returns:String

a string representation of the object

Annotations

@Override

unwrap back to summary

unwrap	back to summary
public <T> T unwrap(Class<T> iface) throws SQLException Implements java.sql.Wrapper.unwrap. Doc from java.sql.Wrapper.unwrap. Returns an object that implements the given interface to allow access to non-standard methods, or standard methods not exposed by the proxy. If the receiver implements the interface then the result is the receiver or a proxy for the receiver. If the receiver is a wrapper and the wrapped object implements the interface then the result is the wrapped object or a proxy for the wrapped object. Otherwise return the the result of calling `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. Parameters <T> the type of the class modeled by this Class object iface:Class<T> A Class defining an interface that the result must implement. Returns:T an object that implements the interface. May be a proxy for the actual implementing object. Annotations @Override Exceptions SQLException: If no object found that implements the interface

public <T> T unwrap(Class<T> iface) throws SQLException

Implements java.sql.Wrapper.unwrap.

Doc from java.sql.Wrapper.unwrap.

Returns an object that implements the given interface to allow access to non-standard methods, or standard methods not exposed by the proxy. If the receiver implements the interface then the result is the receiver or a proxy for the receiver. If the receiver is a wrapper and the wrapped object implements the interface then the result is the wrapped object or a proxy for the wrapped object. Otherwise return the the result of calling 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.

Parameters

<T>: the type of the class modeled by this Class object
iface:Class<T>: A Class defining an interface that the result must implement.

Returns:T

an object that implements the interface. May be a proxy for the actual implementing object.

Annotations

@Override

Exceptions

SQLException:: If no object found that implements the interface

public Class ResultSetMetaData

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