ColumnMetaData (Apache Derby V10.14 Internals)

java.lang.Object
- org.apache.derby.client.am.ColumnMetaData

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

public class ColumnMetaData
extends java.lang.Object
implements java.sql.ResultSetMetaData

Field Summary

Fields
Modifier and Type	Field	Description
`int[]`	`clientParamtertype_`
`private java.util.Hashtable<java.lang.String,java.lang.Integer>`	`columnNameToIndexCache_`
`int`	`columns_`
`private LogWriter`	`logWriter_`
`boolean[]`	`nullable_`
`int[][]`	`protocolTypesCache_`
`(package private) int`	`resultSetConcurrency_`
`int[]`	`sqlCcsid_`
`java.lang.String[]`	`sqlComment_`
`short`	`sqldFcode_`
`short`	`sqldHold_`
`short`	`sqldKeytype_`
`java.lang.String`	`sqldRdbnam_`
`short`	`sqldReturn_`
`java.lang.String`	`sqldSchema_`
`short`	`sqldScroll_`
`short`	`sqldSensitive_`
`java.lang.String[]`	`sqlLabel_`
`long[]`	`sqlLength_`
`java.lang.String[]`	`sqlName_`
`int[]`	`sqlPrecision_`
`int[]`	`sqlScale_`
`int[]`	`sqlType_`
`java.lang.String[]`	`sqlUDTclassName_`
`java.lang.String[]`	`sqlUDTname_`
`short[]`	`sqlUnnamed_`
`java.lang.String[]`	`sqlxBasename_`
`java.lang.String[]`	`sqlxCorname_`
`short[]`	`sqlxGenerated_`
`short[]`	`sqlxKeymem_`
`java.lang.String[]`	`sqlxName_`
`short[]`	`sqlxParmmode_`
`java.lang.String[]`	`sqlxRdbnam_`
`java.lang.String[]`	`sqlxSchema_`
`int[]`	`sqlxUpdatable_`
`private boolean`	`statementClosed_`
`int[]`	`types_`

Fields inherited from interface java.sql.ResultSetMetaData
columnNoNulls, columnNullable, columnNullableUnknown

Constructor Summary

Constructors
Constructor Description

ColumnMetaData(LogWriter logWriter)

ColumnMetaData(LogWriter logWriter, int upperBound)

Constructors
Constructor	Description
`ColumnMetaData(LogWriter logWriter)`
`ColumnMetaData(LogWriter logWriter, int upperBound)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`private void`	`assignColumnName(int column)`
`private void`	`checkForClosedStatement()`
`(package private) void`	`checkForValidColumnIndex(int column)`
`(package private) int`	`findColumnX(java.lang.String columnName)`
`java.lang.String`	`getCatalogName(int column)`	What's a column's table's catalog name?
`java.lang.String`	`getColumnClassName(int column)`
`int`	`getColumnCount()`
`int`	`getColumnDisplaySize(int column)`
`java.lang.String`	`getColumnLabel(int column)`
`java.lang.String`	`getColumnName(int column)`
`int`	`getColumnType(int column)`
`java.lang.String`	`getColumnTypeName(int column)`
`int`	`getPrecision(int column)`
`int`	`getScale(int column)`
`java.lang.String`	`getSchemaName(int column)`
`java.lang.String`	`getTableName(int column)`
`(package private) boolean`	`hasLobColumns()`
`void`	`initializeCache(int upperBound)`
`boolean`	`isAutoIncrement(int column)`
`boolean`	`isCaseSensitive(int column)`
`boolean`	`isCurrency(int column)`
`boolean`	`isDefinitelyWritable(int column)`
`int`	`isNullable(int column)`
`boolean`	`isReadOnly(int column)`
`boolean`	`isSearchable(int column)`
`boolean`	`isSigned(int column)`
`boolean`	`isWrapperFor(java.lang.Class<?> iface)`	Check whether this instance wraps an object that implements the interface specified by `iface`.
`boolean`	`isWritable(int column)`
`(package private) void`	`markClosed()`
`private void`	`nullDataForGC()`
`void`	`setLogWriter(LogWriter logWriter)`
`<T> T`	`unwrap(java.lang.Class<T> iface)`	Returns `this` if this class implements the specified interface.

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

Field Detail

columns_
```
public int columns_
```

nullable_
```
public boolean[] nullable_
```

sqldHold_
```
public short sqldHold_
```

sqldReturn_
```
public short sqldReturn_
```

sqldScroll_
```
public short sqldScroll_
```

sqldSensitive_
```
public short sqldSensitive_
```

sqldFcode_
```
public short sqldFcode_
```

sqldKeytype_
```
public short sqldKeytype_
```

sqldRdbnam_
```
public java.lang.String sqldRdbnam_
```

sqldSchema_
```
public java.lang.String sqldSchema_
```

sqlPrecision_
```
public int[] sqlPrecision_
```

sqlScale_
```
public int[] sqlScale_
```

sqlLength_
```
public long[] sqlLength_
```

sqlType_
```
public int[] sqlType_
```

sqlCcsid_
```
public int[] sqlCcsid_
```

sqlName_
```
public java.lang.String[] sqlName_
```

sqlLabel_
```
public java.lang.String[] sqlLabel_
```

sqlUnnamed_
```
public short[] sqlUnnamed_
```

sqlComment_
```
public java.lang.String[] sqlComment_
```

sqlUDTname_
```
public java.lang.String[] sqlUDTname_
```

sqlUDTclassName_

public java.lang.String[] sqlUDTclassName_

sqlxKeymem_
```
public short[] sqlxKeymem_
```

sqlxGenerated_
```
public short[] sqlxGenerated_
```

sqlxParmmode_
```
public short[] sqlxParmmode_
```

sqlxCorname_
```
public java.lang.String[] sqlxCorname_
```

sqlxName_
```
public java.lang.String[] sqlxName_
```

sqlxBasename_

public java.lang.String[] sqlxBasename_

sqlxUpdatable_
```
public int[] sqlxUpdatable_
```

sqlxSchema_
```
public java.lang.String[] sqlxSchema_
```

sqlxRdbnam_
```
public java.lang.String[] sqlxRdbnam_
```

protocolTypesCache_

public transient int[][] protocolTypesCache_

types_
```
public transient int[] types_
```

clientParamtertype_

public transient int[] clientParamtertype_

logWriter_
```
private transient LogWriter logWriter_
```

resultSetConcurrency_
```
transient int resultSetConcurrency_
```

columnNameToIndexCache_

private transient java.util.Hashtable<java.lang.String,java.lang.Integer> columnNameToIndexCache_

statementClosed_

private transient boolean statementClosed_

Constructor Detail

ColumnMetaData

public ColumnMetaData(LogWriter logWriter)

ColumnMetaData

public ColumnMetaData(LogWriter logWriter,
                      int upperBound)

Method Detail
- markClosed
```
void markClosed()
```
- checkForClosedStatement
```
private void checkForClosedStatement()
                              throws SqlException
```
  Throws:
  
  SqlException
- initializeCache
```
public void initializeCache(int upperBound)
```
- getColumnCount
```
public int getColumnCount()
                   throws java.sql.SQLException
```
  Specified by:
  
  getColumnCount in interface java.sql.ResultSetMetaData
  
  Throws:
  
  java.sql.SQLException
- isAutoIncrement
```
public boolean isAutoIncrement(int column)
                        throws java.sql.SQLException
```
  Specified by:
  
  isAutoIncrement in interface java.sql.ResultSetMetaData
  
  Throws:
  
  java.sql.SQLException
- isCaseSensitive
```
public boolean isCaseSensitive(int column)
                        throws java.sql.SQLException
```
  Specified by:
  
  isCaseSensitive in interface java.sql.ResultSetMetaData
  
  Throws:
  
  java.sql.SQLException
- isSearchable
```
public boolean isSearchable(int column)
                     throws java.sql.SQLException
```
  Specified by:
  
  isSearchable in interface java.sql.ResultSetMetaData
  
  Throws:
  
  java.sql.SQLException
- isCurrency
```
public boolean isCurrency(int column)
                   throws java.sql.SQLException
```
  Specified by:
  
  isCurrency in interface java.sql.ResultSetMetaData
  
  Throws:
  
  java.sql.SQLException
- isNullable
```
public int isNullable(int column)
               throws java.sql.SQLException
```
  Specified by:
  
  isNullable in interface java.sql.ResultSetMetaData
  
  Throws:
  
  java.sql.SQLException
- isSigned
```
public boolean isSigned(int column)
                 throws java.sql.SQLException
```
  Specified by:
  
  isSigned in interface java.sql.ResultSetMetaData
  
  Throws:
  
  java.sql.SQLException
- getColumnDisplaySize
```
public int getColumnDisplaySize(int column)
                         throws java.sql.SQLException
```
  Specified by:
  
  getColumnDisplaySize in interface java.sql.ResultSetMetaData
  
  Throws:
  
  java.sql.SQLException
- getColumnLabel
```
public java.lang.String getColumnLabel(int column)
                                throws java.sql.SQLException
```
  Specified by:
  
  getColumnLabel in interface java.sql.ResultSetMetaData
  
  Throws:
  
  java.sql.SQLException
- getColumnName
```
public java.lang.String getColumnName(int column)
                               throws java.sql.SQLException
```
  Specified by:
  
  getColumnName in interface java.sql.ResultSetMetaData
  
  Throws:
  
  java.sql.SQLException
- getSchemaName
```
public java.lang.String getSchemaName(int column)
                               throws java.sql.SQLException
```
  Specified by:
  
  getSchemaName in interface java.sql.ResultSetMetaData
  
  Throws:
  
  java.sql.SQLException
- getPrecision
```
public int getPrecision(int column)
                 throws java.sql.SQLException
```
  Specified by:
  
  getPrecision in interface java.sql.ResultSetMetaData
  
  Throws:
  
  java.sql.SQLException
- getScale
```
public int getScale(int column)
             throws java.sql.SQLException
```
  Specified by:
  
  getScale in interface java.sql.ResultSetMetaData
  
  Throws:
  
  java.sql.SQLException
- getTableName
```
public java.lang.String getTableName(int column)
                              throws java.sql.SQLException
```
  Specified by:
  
  getTableName in interface java.sql.ResultSetMetaData
  
  Throws:
  
  java.sql.SQLException
- getCatalogName
```
public java.lang.String getCatalogName(int column)
                                throws java.sql.SQLException
```
  What's a column's table's catalog name?
  
  Specified by:
  
  getCatalogName in interface java.sql.ResultSetMetaData
  
  Parameters:
  
  column - the first column is 1, the second is 2, ...
  
  Returns:
  
  column name or "" if not applicable.
  
  Throws:
  
  java.sql.SQLException - thrown on failure
- getColumnType
```
public int getColumnType(int column)
                  throws java.sql.SQLException
```
  Specified by:
  
  getColumnType in interface java.sql.ResultSetMetaData
  
  Throws:
  
  java.sql.SQLException
- getColumnTypeName
```
public java.lang.String getColumnTypeName(int column)
                                   throws java.sql.SQLException
```
  Specified by:
  
  getColumnTypeName in interface java.sql.ResultSetMetaData
  
  Throws:
  
  java.sql.SQLException
- isReadOnly
```
public boolean isReadOnly(int column)
                   throws java.sql.SQLException
```
  Specified by:
  
  isReadOnly in interface java.sql.ResultSetMetaData
  
  Throws:
  
  java.sql.SQLException
- isWritable
```
public boolean isWritable(int column)
                   throws java.sql.SQLException
```
  Specified by:
  
  isWritable in interface java.sql.ResultSetMetaData
  
  Throws:
  
  java.sql.SQLException
- isDefinitelyWritable
```
public boolean isDefinitelyWritable(int column)
                             throws java.sql.SQLException
```
  Specified by:
  
  isDefinitelyWritable in interface java.sql.ResultSetMetaData
  
  Throws:
  
  java.sql.SQLException
- getColumnClassName
```
public java.lang.String getColumnClassName(int column)
                                    throws java.sql.SQLException
```
  Specified by:
  
  getColumnClassName in interface java.sql.ResultSetMetaData
  
  Throws:
  
  java.sql.SQLException
- checkForValidColumnIndex
```
void checkForValidColumnIndex(int column)
                       throws SqlException
```
  Throws:
  
  SqlException
- setLogWriter
```
public void setLogWriter(LogWriter logWriter)
```
- nullDataForGC
```
private void nullDataForGC()
```
- hasLobColumns
```
boolean hasLobColumns()
```
- findColumnX
```
int findColumnX(java.lang.String columnName)
         throws SqlException
```
  Throws:
  
  SqlException
- assignColumnName
```
private void assignColumnName(int column)
```
- isWrapperFor
```
public boolean isWrapperFor(java.lang.Class<?> iface)
                     throws java.sql.SQLException
```
  Check whether this instance wraps an object that implements the interface specified by iface.
  
  Specified by:
  
  isWrapperFor in interface java.sql.Wrapper
  
  Parameters:
  
  iface - a class defining an interface
  
  Returns:
  
  true if this instance implements iface, or false otherwise
  
  Throws:
  
  java.sql.SQLException - if an error occurs while determining if this instance implements iface
- unwrap
```
public <T> T unwrap(java.lang.Class<T> iface)
             throws java.sql.SQLException
```
  Returns this if this class implements the specified interface.
  
  Specified by:
  
  unwrap in interface java.sql.Wrapper
  
  Parameters:
  
  iface - a class defining an interface
  
  Returns:
  
  an object that implements the interface
  
  Throws:
  
  java.sql.SQLException - if no object is found that implements the interface

Class ColumnMetaData

Field Summary

Fields inherited from interface java.sql.ResultSetMetaData

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

columns_

nullable_

sqldHold_

sqldReturn_

sqldScroll_

sqldSensitive_

sqldFcode_

sqldKeytype_

sqldRdbnam_

sqldSchema_

sqlPrecision_

sqlScale_

sqlLength_

sqlType_

sqlCcsid_

sqlName_

sqlLabel_

sqlUnnamed_

sqlComment_

sqlUDTname_

sqlUDTclassName_

sqlxKeymem_

sqlxGenerated_

sqlxParmmode_

sqlxCorname_

sqlxName_

sqlxBasename_

sqlxUpdatable_

sqlxSchema_

sqlxRdbnam_

protocolTypesCache_

types_

clientParamtertype_

logWriter_

resultSetConcurrency_

columnNameToIndexCache_

statementClosed_

Constructor Detail

ColumnMetaData

ColumnMetaData

Method Detail

markClosed

checkForClosedStatement

initializeCache

getColumnCount

isAutoIncrement

isCaseSensitive

isSearchable

isCurrency

isNullable

isSigned

getColumnDisplaySize

getColumnLabel

getColumnName

getSchemaName

getPrecision

getScale

getTableName

getCatalogName

getColumnType

getColumnTypeName

isReadOnly

isWritable

isDefinitelyWritable

getColumnClassName

checkForValidColumnIndex

setLogWriter

nullDataForGC

hasLobColumns

findColumnX

assignColumnName

isWrapperFor

unwrap