Package org.h2.jdbc

Class JdbcResultSetMetaData

java.lang.Object
org.h2.message.TraceObject
org.h2.jdbc.JdbcResultSetMetaData
All Implemented Interfaces:
ResultSetMetaData, Wrapper
public final class JdbcResultSetMetaData extends org.h2.message.TraceObject implements 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

    Modifier and Type
    Method
    Description
    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.

    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 Details

    • getColumnCount

      public int getColumnCount() throws SQLException
      Returns the number of columns.
      Specified by:
      getColumnCount in interface ResultSetMetaData
      Returns:
      the number of columns
      Throws:
      SQLException - if the result set is closed or invalid

    • getColumnLabel

      public String getColumnLabel(int column) throws SQLException
      Returns the column label.
      Specified by:
      getColumnLabel in interface ResultSetMetaData
      Parameters:
      column - the column index (1,2,...)
      Returns:
      the column label
      Throws:
      SQLException - if the result set is closed or invalid

    • getColumnName

      public String getColumnName(int column) throws SQLException
      Returns the column name.
      Specified by:
      getColumnName in interface ResultSetMetaData
      Parameters:
      column - the column index (1,2,...)
      Returns:
      the column name
      Throws:
      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.
      Specified by:
      getColumnType in interface ResultSetMetaData
      Parameters:
      column - the column index (1,2,...)
      Returns:
      the data type
      Throws:
      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.
      Specified by:
      getColumnTypeName in interface ResultSetMetaData
      Parameters:
      column - the column index (1,2,...)
      Returns:
      the data type name
      Throws:
      SQLException - if the result set is closed or invalid

    • getSchemaName

      public String getSchemaName(int column) throws SQLException
      Returns the schema name.
      Specified by:
      getSchemaName in interface ResultSetMetaData
      Parameters:
      column - the column index (1,2,...)
      Returns:
      the schema name, or "" (an empty string) if not applicable
      Throws:
      SQLException - if the result set is closed or invalid

    • getTableName

      public String getTableName(int column) throws SQLException
      Returns the table name.
      Specified by:
      getTableName in interface ResultSetMetaData
      Parameters:
      column - the column index (1,2,...)
      Returns:
      the table name
      Throws:
      SQLException - if the result set is closed or invalid

    • getCatalogName

      public String getCatalogName(int column) throws SQLException
      Returns the catalog name.
      Specified by:
      getCatalogName in interface ResultSetMetaData
      Parameters:
      column - the column index (1,2,...)
      Returns:
      the catalog name
      Throws:
      SQLException - if the result set is closed or invalid

    • isAutoIncrement

      public boolean isAutoIncrement(int column) throws SQLException
      Checks if this an autoincrement column.
      Specified by:
      isAutoIncrement in interface ResultSetMetaData
      Parameters:
      column - the column index (1,2,...)
      Returns:
      false
      Throws:
      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.
      Specified by:
      isCaseSensitive in interface ResultSetMetaData
      Parameters:
      column - the column index (1,2,...)
      Returns:
      true
      Throws:
      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.
      Specified by:
      isSearchable in interface ResultSetMetaData
      Parameters:
      column - the column index (1,2,...)
      Returns:
      true
      Throws:
      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.
      Specified by:
      isCurrency in interface ResultSetMetaData
      Parameters:
      column - the column index (1,2,...)
      Returns:
      false
      Throws:
      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.
      Specified by:
      isNullable in interface ResultSetMetaData
      Parameters:
      column - the column index (1,2,...)
      Returns:
      ResultSetMetaData.column*
      Throws:
      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.
      Specified by:
      isSigned in interface ResultSetMetaData
      Parameters:
      column - the column index (1,2,...)
      Returns:
      true for numeric columns
      Throws:
      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.
      Specified by:
      isReadOnly in interface ResultSetMetaData
      Parameters:
      column - the column index (1,2,...)
      Returns:
      false
      Throws:
      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.
      Specified by:
      isWritable in interface ResultSetMetaData
      Parameters:
      column - the column index (1,2,...)
      Returns:
      true
      Throws:
      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.
      Specified by:
      isDefinitelyWritable in interface ResultSetMetaData
      Parameters:
      column - the column index (1,2,...)
      Returns:
      false
      Throws:
      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.
      Specified by:
      getColumnClassName in interface ResultSetMetaData
      Parameters:
      column - the column index (1,2,...)
      Returns:
      the Java class name
      Throws:
      SQLException - if the result set is closed or invalid

    • getPrecision

      public int getPrecision(int column) throws SQLException
      Gets the precision for this column.
      Specified by:
      getPrecision in interface ResultSetMetaData
      Parameters:
      column - the column index (1,2,...)
      Returns:
      the precision
      Throws:
      SQLException - if the result set is closed or invalid

    • getScale

      public int getScale(int column) throws SQLException
      Gets the scale for this column.
      Specified by:
      getScale in interface ResultSetMetaData
      Parameters:
      column - the column index (1,2,...)
      Returns:
      the scale
      Throws:
      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.
      Specified by:
      getColumnDisplaySize in interface ResultSetMetaData
      Parameters:
      column - the column index (1,2,...)
      Returns:
      the display size
      Throws:
      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.
      Specified by:
      unwrap in interface Wrapper
      Parameters:
      iface - the class
      Returns:
      this
      Throws:
      SQLException

    • isWrapperFor

      public boolean isWrapperFor(Class<?> iface) throws SQLException
      Checks if unwrap can return an object of this class.
      Specified by:
      isWrapperFor in interface Wrapper
      Parameters:
      iface - the class
      Returns:
      whether or not the interface is assignable from this class
      Throws:
      SQLException

    • toString

      public String toString()
      INTERNAL
      Overrides:
      toString in class Object