JdbcResultSetMetaData (H2 Database Engine 2.0.0 API)

java.lang.Object
- org.h2.message.TraceObject
- - org.h2.jdbc.JdbcResultSetMetaData

所有已实现的接口:: ResultSetMetaData, Wrapper

public final class JdbcResultSetMetaData
extends TraceObject
implements ResultSetMetaData

Represents the meta data for a ResultSet.

字段概要
- 从类继承的字段 org.h2.message.TraceObject
  ARRAY, BLOB, CALLABLE_STATEMENT, CLOB, CONNECTION, DATA_SOURCE, DATABASE_META_DATA, PARAMETER_META_DATA, PREPARED_STATEMENT, RESULT_SET, RESULT_SET_META_DATA, SAVEPOINT, SQLXML, STATEMENT, trace, XA_DATA_SOURCE, XID
- 从接口继承的字段 java.sql.ResultSetMetaData
  columnNoNulls, columnNullable, columnNullableUnknown

方法概要

所有方法实例方法具体方法
限定符和类型	方法和说明
`String`	`getCatalogName(int column)` Returns the catalog name.
`String`	`getColumnClassName(int column)` Gets the Java class name of the object that will be returned if ResultSet.getObject is called.
`int`	`getColumnCount()` Returns the number of columns.
`int`	`getColumnDisplaySize(int column)` Gets the maximum display size for this column.
`String`	`getColumnLabel(int column)` Returns the column label.
`String`	`getColumnName(int column)` Returns the column name.
`int`	`getColumnType(int column)` Returns the data type of a column.
`String`	`getColumnTypeName(int column)` Returns the data type name of a column.
`int`	`getPrecision(int column)` Gets the precision for this column.
`int`	`getScale(int column)` Gets the scale for this column.
`String`	`getSchemaName(int column)` Returns the schema name.
`String`	`getTableName(int column)` Returns the table name.
`boolean`	`isAutoIncrement(int column)` Checks if this an autoincrement column.
`boolean`	`isCaseSensitive(int column)` Checks if this column is case sensitive.
`boolean`	`isCurrency(int column)` Checks if this is a currency column.
`boolean`	`isDefinitelyWritable(int column)` Checks whether a write on this column will definitely succeed.
`int`	`isNullable(int column)` Checks if this is nullable column.
`boolean`	`isReadOnly(int column)` Checks if this column is read only.
`boolean`	`isSearchable(int column)` Checks if this column is searchable.
`boolean`	`isSigned(int column)` Checks if this column is signed.
`boolean`	`isWrapperFor(Class<?> iface)` Checks if unwrap can return an object of this class.
`boolean`	`isWritable(int column)` Checks whether it is possible for a write on this column to succeed.
`String`	`toString()` INTERNAL
`<T> T`	`unwrap(Class<T> iface)` Return an object of this class if possible.

从类继承的方法 org.h2.message.TraceObject
debugCode, debugCodeAssign, debugCodeCall, debugCodeCall, debugCodeCall, getNextId, getTraceId, getTraceObjectName, isDebugEnabled, isInfoEnabled, logAndConvert, quote, quoteArray, quoteBigDecimal, quoteBytes, quoteDate, quoteIntArray, quoteMap, quoteTime, quoteTimestamp, setTrace, unsupported

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- 方法详细资料
  - getColumnCount
```
public int getColumnCount()
                   throws SQLException
```
    Returns the number of columns.
    
    指定者:
    
    getColumnCount 在接口中 ResultSetMetaData
    
    返回:
    
    the number of columns
    
    抛出:
    
    SQLException - if the result set is closed or invalid
  - getColumnLabel
```
public String getColumnLabel(int column)
                      throws SQLException
```
    Returns the column label.
    
    指定者:
    
    getColumnLabel 在接口中 ResultSetMetaData
    
    参数:
    
    column - the column index (1,2,...)
    
    返回:
    
    the column label
    
    抛出:
    
    SQLException - if the result set is closed or invalid
  - getColumnName
```
public String getColumnName(int column)
                     throws SQLException
```
    Returns the column name.
    
    指定者:
    
    getColumnName 在接口中 ResultSetMetaData
    
    参数:
    
    column - the column index (1,2,...)
    
    返回:
    
    the column name
    
    抛出:
    
    SQLException - if the result set is closed or invalid
  - getColumnType
```
public int getColumnType(int column)
                  throws SQLException
```
    Returns the data type of a column. See also java.sql.Type.
    
    指定者:
    
    getColumnType 在接口中 ResultSetMetaData
    
    参数:
    
    column - the column index (1,2,...)
    
    返回:
    
    the data type
    
    抛出:
    
    SQLException - if the result set is closed or invalid
  - getColumnTypeName
```
public String getColumnTypeName(int column)
                         throws SQLException
```
    Returns the data type name of a column.
    
    指定者:
    
    getColumnTypeName 在接口中 ResultSetMetaData
    
    参数:
    
    column - the column index (1,2,...)
    
    返回:
    
    the data type name
    
    抛出:
    
    SQLException - if the result set is closed or invalid
  - getSchemaName
```
public String getSchemaName(int column)
                     throws SQLException
```
    Returns the schema name.
    
    指定者:
    
    getSchemaName 在接口中 ResultSetMetaData
    
    参数:
    
    column - the column index (1,2,...)
    
    返回:
    
    the schema name, or "" (an empty string) if not applicable
    
    抛出:
    
    SQLException - if the result set is closed or invalid
  - getTableName
```
public String getTableName(int column)
                    throws SQLException
```
    Returns the table name.
    
    指定者:
    
    getTableName 在接口中 ResultSetMetaData
    
    参数:
    
    column - the column index (1,2,...)
    
    返回:
    
    the table name
    
    抛出:
    
    SQLException - if the result set is closed or invalid
  - getCatalogName
```
public String getCatalogName(int column)
                      throws SQLException
```
    Returns the catalog name.
    
    指定者:
    
    getCatalogName 在接口中 ResultSetMetaData
    
    参数:
    
    column - the column index (1,2,...)
    
    返回:
    
    the catalog name
    
    抛出:
    
    SQLException - if the result set is closed or invalid
  - isAutoIncrement
```
public boolean isAutoIncrement(int column)
                        throws SQLException
```
    Checks if this an autoincrement column.
    
    指定者:
    
    isAutoIncrement 在接口中 ResultSetMetaData
    
    参数:
    
    column - the column index (1,2,...)
    
    返回:
    
    false
    
    抛出:
    
    SQLException - if the result set is closed or invalid
  - isCaseSensitive
```
public boolean isCaseSensitive(int column)
                        throws SQLException
```
    Checks if this column is case sensitive. It always returns true.
    
    指定者:
    
    isCaseSensitive 在接口中 ResultSetMetaData
    
    参数:
    
    column - the column index (1,2,...)
    
    返回:
    
    true
    
    抛出:
    
    SQLException - if the result set is closed or invalid
  - isSearchable
```
public boolean isSearchable(int column)
                     throws SQLException
```
    Checks if this column is searchable. It always returns true.
    
    指定者:
    
    isSearchable 在接口中 ResultSetMetaData
    
    参数:
    
    column - the column index (1,2,...)
    
    返回:
    
    true
    
    抛出:
    
    SQLException - if the result set is closed or invalid
  - isCurrency
```
public boolean isCurrency(int column)
                   throws SQLException
```
    Checks if this is a currency column. It always returns false.
    
    指定者:
    
    isCurrency 在接口中 ResultSetMetaData
    
    参数:
    
    column - the column index (1,2,...)
    
    返回:
    
    false
    
    抛出:
    
    SQLException - if the result set is closed or invalid
  - isNullable
```
public int isNullable(int column)
               throws SQLException
```
    Checks if this is nullable column. Returns ResultSetMetaData.columnNullableUnknown if this is not a column of a table. Otherwise, it returns ResultSetMetaData.columnNoNulls if the column is not nullable, and ResultSetMetaData.columnNullable if it is nullable.
    
    指定者:
    
    isNullable 在接口中 ResultSetMetaData
    
    参数:
    
    column - the column index (1,2,...)
    
    返回:
    
    ResultSetMetaData.column*
    
    抛出:
    
    SQLException - if the result set is closed or invalid
  - isSigned
```
public boolean isSigned(int column)
                 throws SQLException
```
    Checks if this column is signed. Returns true for numeric columns.
    
    指定者:
    
    isSigned 在接口中 ResultSetMetaData
    
    参数:
    
    column - the column index (1,2,...)
    
    返回:
    
    true for numeric columns
    
    抛出:
    
    SQLException - if the result set is closed or invalid
  - isReadOnly
```
public boolean isReadOnly(int column)
                   throws SQLException
```
    Checks if this column is read only. It always returns false.
    
    指定者:
    
    isReadOnly 在接口中 ResultSetMetaData
    
    参数:
    
    column - the column index (1,2,...)
    
    返回:
    
    false
    
    抛出:
    
    SQLException - if the result set is closed or invalid
  - isWritable
```
public boolean isWritable(int column)
                   throws SQLException
```
    Checks whether it is possible for a write on this column to succeed. It always returns true.
    
    指定者:
    
    isWritable 在接口中 ResultSetMetaData
    
    参数:
    
    column - the column index (1,2,...)
    
    返回:
    
    true
    
    抛出:
    
    SQLException - if the result set is closed or invalid
  - isDefinitelyWritable
```
public boolean isDefinitelyWritable(int column)
                             throws SQLException
```
    Checks whether a write on this column will definitely succeed. It always returns false.
    
    指定者:
    
    isDefinitelyWritable 在接口中 ResultSetMetaData
    
    参数:
    
    column - the column index (1,2,...)
    
    返回:
    
    false
    
    抛出:
    
    SQLException - if the result set is closed or invalid
  - getColumnClassName
```
public String getColumnClassName(int column)
                          throws SQLException
```
    Gets the Java class name of the object that will be returned if ResultSet.getObject is called.
    
    指定者:
    
    getColumnClassName 在接口中 ResultSetMetaData
    
    参数:
    
    column - the column index (1,2,...)
    
    返回:
    
    the Java class name
    
    抛出:
    
    SQLException - if the result set is closed or invalid
  - getPrecision
```
public int getPrecision(int column)
                 throws SQLException
```
    Gets the precision for this column.
    
    指定者:
    
    getPrecision 在接口中 ResultSetMetaData
    
    参数:
    
    column - the column index (1,2,...)
    
    返回:
    
    the precision
    
    抛出:
    
    SQLException - if the result set is closed or invalid
  - getScale
```
public int getScale(int column)
             throws SQLException
```
    Gets the scale for this column.
    
    指定者:
    
    getScale 在接口中 ResultSetMetaData
    
    参数:
    
    column - the column index (1,2,...)
    
    返回:
    
    the scale
    
    抛出:
    
    SQLException - if the result set is closed or invalid
  - getColumnDisplaySize
```
public int getColumnDisplaySize(int column)
                         throws SQLException
```
    Gets the maximum display size for this column.
    
    指定者:
    
    getColumnDisplaySize 在接口中 ResultSetMetaData
    
    参数:
    
    column - the column index (1,2,...)
    
    返回:
    
    the display size
    
    抛出:
    
    SQLException - if the result set is closed or invalid
  - unwrap
```
public <T> T unwrap(Class<T> iface)
             throws SQLException
```
    Return an object of this class if possible.
    
    指定者:
    
    unwrap 在接口中 Wrapper
    
    参数:
    
    iface - the class
    
    返回:
    
    this
    
    抛出:
    
    SQLException
  - isWrapperFor
```
public boolean isWrapperFor(Class<?> iface)
                     throws SQLException
```
    Checks if unwrap can return an object of this class.
    
    指定者:
    
    isWrapperFor 在接口中 Wrapper
    
    参数:
    
    iface - the class
    
    返回:
    
    whether or not the interface is assignable from this class
    
    抛出:
    
    SQLException
  - toString
```
public String toString()
```
    INTERNAL
    
    覆盖:
    
    toString 在类中 Object

类 JdbcResultSetMetaData

字段概要

从类继承的字段 org.h2.message.TraceObject

从接口继承的字段 java.sql.ResultSetMetaData

方法概要

从类继承的方法 org.h2.message.TraceObject

从类继承的方法 java.lang.Object

方法详细资料

getColumnCount

getColumnLabel

getColumnName

getColumnType

getColumnTypeName

getSchemaName

getTableName

getCatalogName

isAutoIncrement

isCaseSensitive

isSearchable

isCurrency

isNullable

isSigned

isReadOnly

isWritable

isDefinitelyWritable

getColumnClassName

getPrecision

getScale

getColumnDisplaySize

unwrap

isWrapperFor

toString