JdbcResultSetMetaData

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

All Implemented Interfaces:: java.sql.ResultSetMetaData, java.sql.Wrapper

public final class JdbcResultSetMetaData
extends org.h2.message.TraceObject
implements java.sql.ResultSetMetaData

Represents the meta data for a ResultSet.

Field Summary
- Fields inherited from class 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
- Fields inherited from interface java.sql.ResultSetMetaData
  columnNoNulls, columnNullable, columnNullableUnknown

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`java.lang.String`	`getCatalogName(int column)` Returns the catalog name.
`java.lang.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.
`java.lang.String`	`getColumnLabel(int column)` Returns the column label.
`java.lang.String`	`getColumnName(int column)` Returns the column name.
`int`	`getColumnType(int column)` Returns the data type of a column.
`java.lang.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.
`java.lang.String`	`getSchemaName(int column)` Returns the schema name.
`java.lang.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(java.lang.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.
`java.lang.String`	`toString()` INTERNAL
`<T> T`	`unwrap(java.lang.Class<T> iface)` Return an object of this class if possible.

Methods inherited from class 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

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

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

Class JdbcResultSetMetaData

Field Summary

Fields inherited from class org.h2.message.TraceObject

Fields inherited from interface java.sql.ResultSetMetaData

Method Summary

Methods inherited from class org.h2.message.TraceObject

Methods inherited from class java.lang.Object

Method Detail

getColumnCount

getColumnLabel

getColumnName

getColumnType

getColumnTypeName

getSchemaName

getTableName

getCatalogName

isAutoIncrement

isCaseSensitive

isSearchable

isCurrency

isNullable

isSigned

isReadOnly

isWritable

isDefinitelyWritable

getColumnClassName

getPrecision

getScale

getColumnDisplaySize

unwrap

isWrapperFor

toString