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## org.springframework.jdbc.support.rowset
Interface SqlRowSet

All Superinterfaces:
  java.io.Serializable

All Known Implementing Classes:
  ResultSetWrappingSqlRowSet

    public interface SqlRowSet

extends java.io.Serializable

Mirror interface for `javax.sql.RowSet`, representing disconnected `java.sql.ResultSet` data.

The main difference to the standard JDBC RowSet is that an SQLException is never thrown here. This allows a SqlRowSet to be used without having to deal with checked exceptions. A SqlRowSet will throw Spring's `org.springframework.jdbc.InvalidResultSetAccessException` instead (when appropriate).

Note: This interface extends the `java.io.Serializable` marker interface. Implementations, which typically hold disconnected data, are encouraged to be actually serializable (as far as possible).

Since:
  1.2
Author:
  Thomas Risberg, Juergen Hoeller
See Also:
  `RowSet`, `ResultSet`, `InvalidResultSetAccessException`, `JdbcTemplate.queryForRowSet(java.lang.String)`

Method Summary
`boolean` | `absolute(int row)` Moves the cursor to the given row number in the RowSet, just after the last row.
`void` | `afterLast()` Moves the cursor to the end of this RowSet.
`void` | `beforeFirst()` Moves the cursor to the front of this RowSet, just before the first row.
`int` | `findColumn(java.lang.String columnLabel)` Maps the given column label to its column index.
`boolean` | `first()` Moves the cursor to the first row of this RowSet.
`java.math.BigDecimal` | `getBigDecimal(int columnIndex)` Retrieves the value of the indicated column in the current row as an BigDecimal object.
`java.math.BigDecimal` | `getBigDecimal(java.lang.String columnLabel)` Retrieves the value of the indicated column in the current row as an BigDecimal object.
`boolean` | `getBoolean(int columnIndex)` Retrieves the value of the indicated column in the current row as a boolean.
`boolean` | `getBoolean(java.lang.String columnLabel)` Retrieves the value of the indicated column in the current row as a boolean.
`byte` | `getByte(int columnIndex)` Retrieves the value of the indicated column in the current row as a byte.
`byte` | `getByte(java.lang.String columnLabel)` Retrieves the value of the indicated column in the current row as a byte.
`java.sql.Date` | `getDate(int columnIndex)` Retrieves the value of the indicated column in the current row as a Date object.
`java.sql.Date` | `getDate(int columnIndex, java.util.Calendar cal)` Retrieves the value of the indicated column in the current row as a Date object.
`java.sql.Date` | `getDate(java.lang.String columnLabel)` Retrieves the value of the indicated column in the current row as a Date object.
`java.sql.Date` | `getDate(java.lang.String columnLabel, java.util.Calendar cal)` Retrieves the value of the indicated column in the current row as a Date object.
`double` | `getDouble(int columnIndex)` Retrieves the value of the indicated column in the current row as a Double object.
`double` | `getDouble(java.lang.String columnLabel)` Retrieves the value of the indicated column in the current row as a Double object.
`float` | `getFloat(int columnIndex)` Retrieves the value of the indicated column in the current row as a float.
`float` | `getFloat(java.lang.String columnLabel)` Retrieves the value of the indicated column in the current row as a float.
`int` | `getInt(int columnIndex)` Retrieves the value of the indicated column in the current row as an int.
`int` | `getInt(java.lang.String columnLabel)` Retrieves the value of the indicated column in the current row as an int.
`long` | `getLong(int columnIndex)` Retrieves the value of the indicated column in the current row as a long.
`long` | `getLong(java.lang.String columnLabel)` Retrieves the value of the indicated column in the current row as a long.
`SqlRowSetMetaData` | `getMetaData()` Retrieves the meta data (number, types and properties for the columns) of this row set.
`java.lang.Object` | `getObject(int columnIndex)` Retrieves the value of the indicated column in the current row as an Object.
`java.lang.Object` | `getObject(int columnIndex, java.util.Map<java.lang.String,java.lang.Class<?>> map)` Retrieves the value of the indicated column in the current row as an Object.
`java.lang.Object` | `getObject(java.lang.String columnLabel)` Retrieves the value of the indicated column in the current row as an Object.
`java.lang.Object` | `getObject(java.lang.String columnLabel, java.util.Map<java.lang.String,java.lang.Class<?>> map)` Retrieves the value of the indicated column in the current row as an Object.
`int` | `getRow()` Retrieves the current row number.
`short` | `getShort(int columnIndex)` Retrieves the value of the indicated column in the current row as a short.
`short` | `getShort(java.lang.String columnLabel)` Retrieves the value of the indicated column in the current row as a short.
`java.lang.String` | `getString(int columnIndex)` Retrieves the value of the indicated column in the current row as a String.
`java.lang.String` | `getString(java.lang.String columnLabel)` Retrieves the value of the indicated column in the current row as a String.
`java.sql.Time` | `getTime(int columnIndex)` Retrieves the value of the indicated column in the current row as a Time object.
`java.sql.Time` | `getTime(int columnIndex, java.util.Calendar cal)` Retrieves the value of the indicated column in the current row as a Time object.
`java.sql.Time` | `getTime(java.lang.String columnLabel)` Retrieves the value of the indicated column in the current row as a Time object.
`java.sql.Time` | `getTime(java.lang.String columnLabel, java.util.Calendar cal)` Retrieves the value of the indicated column in the current row as a Time object.
`java.sql.Timestamp` | `getTimestamp(int columnIndex)` Retrieves the value of the indicated column in the current row as a Timestamp object.
`java.sql.Timestamp` | `getTimestamp(int columnIndex, java.util.Calendar cal)` Retrieves the value of the indicated column in the current row as a Timestamp object.
`java.sql.Timestamp` | `getTimestamp(java.lang.String columnLabel)` Retrieves the value of the indicated column in the current row as a Timestamp object.
`java.sql.Timestamp` | `getTimestamp(java.lang.String columnLabel, java.util.Calendar cal)` Retrieves the value of the indicated column in the current row as a Timestamp object.
`boolean` | `isAfterLast()` Retrieves whether the cursor is after the last row of this RowSet.
`boolean` | `isBeforeFirst()` Retrieves whether the cursor is after the first row of this RowSet.
`boolean` | `isFirst()` Retrieves whether the cursor is on the first row of this RowSet.
`boolean` | `isLast()` Retrieves whether the cursor is on the last row of this RowSet.
`boolean` | `last()` Moves the cursor to the last row of this RowSet.
`boolean` | `next()` Moves the cursor to the next row.
`boolean` | `previous()` Moves the cursor to the previous row.
`boolean` | `relative(int rows)` Moves the cursor a relative number f rows, either positive or negative.
`boolean` | `wasNull()` Reports whether the last column read had a value of SQL `NULL`.

Method Detail

### getMetaData

    SqlRowSetMetaData getMetaData()

  Retrieves the meta data (number, types and properties for the columns) of this row set.

  Returns:
    a corresponding SqlRowSetMetaData instance
  See Also:
    `ResultSet.getMetaData()`

### findColumn

    int findColumn(java.lang.String columnLabel)
                   throws InvalidResultSetAccessException

  Maps the given column label to its column index.

  Parameters:
    `columnLabel` - the name of the column
  Returns:
    the column index for the given column label
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.findColumn(String)`

### getBigDecimal

    java.math.BigDecimal getBigDecimal(int columnIndex)
                                       throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as an BigDecimal object.

  Parameters:
    `columnIndex` - the column index
  Returns:
    an BigDecimal object representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getBigDecimal(int)`

### getBigDecimal

    java.math.BigDecimal getBigDecimal(java.lang.String columnLabel)
                                       throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as an BigDecimal object.

  Parameters:
    `columnLabel` - the column label
  Returns:
    an BigDecimal object representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getBigDecimal(java.lang.String)`

### getBoolean

    boolean getBoolean(int columnIndex)
                       throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a boolean.

  Parameters:
    `columnIndex` - the column index
  Returns:
    a boolean representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getBoolean(int)`

### getBoolean

    boolean getBoolean(java.lang.String columnLabel)
                       throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a boolean.

  Parameters:
    `columnLabel` - the column label
  Returns:
    a boolean representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getBoolean(java.lang.String)`

### getByte

    byte getByte(int columnIndex)
                 throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a byte.

  Parameters:
    `columnIndex` - the column index
  Returns:
    a byte representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getByte(int)`

### getByte

    byte getByte(java.lang.String columnLabel)
                 throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a byte.

  Parameters:
    `columnLabel` - the column label
  Returns:
    a byte representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getByte(java.lang.String)`

### getDate

    java.sql.Date getDate(int columnIndex,
                          java.util.Calendar cal)
                          throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a Date object.

  Parameters:
    `columnIndex` - the column index
    `cal` - the Calendar to use in constructing the Date
  Returns:
    a Date object representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getDate(int, java.util.Calendar)`

### getDate

    java.sql.Date getDate(int columnIndex)
                          throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a Date object.

  Parameters:
    `columnIndex` - the column index
  Returns:
    a Date object representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getDate(int)`

### getDate

    java.sql.Date getDate(java.lang.String columnLabel,
                          java.util.Calendar cal)
                          throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a Date object.

  Parameters:
    `columnLabel` - the column label
    `cal` - the Calendar to use in constructing the Date
  Returns:
    a Date object representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getDate(java.lang.String, java.util.Calendar)`

### getDate

    java.sql.Date getDate(java.lang.String columnLabel)
                          throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a Date object.

  Parameters:
    `columnLabel` - the column label
  Returns:
    a Date object representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getDate(java.lang.String)`

### getDouble

    double getDouble(int columnIndex)
                     throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a Double object.

  Parameters:
    `columnIndex` - the column index
  Returns:
    a Double object representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getDouble(int)`

### getDouble

    double getDouble(java.lang.String columnLabel)
                     throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a Double object.

  Parameters:
    `columnLabel` - the column label
  Returns:
    a Double object representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getDouble(java.lang.String)`

### getFloat

    float getFloat(int columnIndex)
                   throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a float.

  Parameters:
    `columnIndex` - the column index
  Returns:
    a float representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getFloat(int)`

### getFloat

    float getFloat(java.lang.String columnLabel)
                   throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a float.

  Parameters:
    `columnLabel` - the column label
  Returns:
    a float representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getFloat(java.lang.String)`

### getInt

    int getInt(int columnIndex)
               throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as an int.

  Parameters:
    `columnIndex` - the column index
  Returns:
    an int representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getInt(int)`

### getInt

    int getInt(java.lang.String columnLabel)
               throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as an int.

  Parameters:
    `columnLabel` - the column label
  Returns:
    an int representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getInt(java.lang.String)`

### getLong

    long getLong(int columnIndex)
                 throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a long.

  Parameters:
    `columnIndex` - the column index
  Returns:
    a long representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getLong(int)`

### getLong

    long getLong(java.lang.String columnLabel)
                 throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a long.

  Parameters:
    `columnLabel` - the column label
  Returns:
    a long representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getLong(java.lang.String)`

### getObject

    java.lang.Object getObject(int columnIndex,
                               java.util.Map<java.lang.String,java.lang.Class<?>> map)
                               throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as an Object.

  Parameters:
    `columnIndex` - the column index
    `map` - a Map object containing the mapping from SQL types to Java types
  Returns:
    a Object representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getObject(int, java.util.Map)`

### getObject

    java.lang.Object getObject(int columnIndex)
                               throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as an Object.

  Parameters:
    `columnIndex` - the column index
  Returns:
    a Object representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getObject(int)`

### getObject

    java.lang.Object getObject(java.lang.String columnLabel,
                               java.util.Map<java.lang.String,java.lang.Class<?>> map)
                               throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as an Object.

  Parameters:
    `columnLabel` - the column label
    `map` - a Map object containing the mapping from SQL types to Java types
  Returns:
    a Object representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getObject(java.lang.String, java.util.Map)`

### getObject

    java.lang.Object getObject(java.lang.String columnLabel)
                               throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as an Object.

  Parameters:
    `columnLabel` - the column label
  Returns:
    a Object representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getObject(java.lang.String)`

### getShort

    short getShort(int columnIndex)
                   throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a short.

  Parameters:
    `columnIndex` - the column index
  Returns:
    a short representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getShort(int)`

### getShort

    short getShort(java.lang.String columnLabel)
                   throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a short.

  Parameters:
    `columnLabel` - the column label
  Returns:
    a short representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getShort(java.lang.String)`

### getString

    java.lang.String getString(int columnIndex)
                               throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a String.

  Parameters:
    `columnIndex` - the column index
  Returns:
    a String representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getString(int)`

### getString

    java.lang.String getString(java.lang.String columnLabel)
                               throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a String.

  Parameters:
    `columnLabel` - the column label
  Returns:
    a String representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getString(java.lang.String)`

### getTime

    java.sql.Time getTime(int columnIndex,
                          java.util.Calendar cal)
                          throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a Time object.

  Parameters:
    `columnIndex` - the column index
    `cal` - the Calendar to use in constructing the Date
  Returns:
    a Time object representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getTime(int, java.util.Calendar)`

### getTime

    java.sql.Time getTime(int columnIndex)
                          throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a Time object.

  Parameters:
    `columnIndex` - the column index
  Returns:
    a Time object representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getTime(int)`

### getTime

    java.sql.Time getTime(java.lang.String columnLabel,
                          java.util.Calendar cal)
                          throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a Time object.

  Parameters:
    `columnLabel` - the column label
    `cal` - the Calendar to use in constructing the Date
  Returns:
    a Time object representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getTime(java.lang.String, java.util.Calendar)`

### getTime

    java.sql.Time getTime(java.lang.String columnLabel)
                          throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a Time object.

  Parameters:
    `columnLabel` - the column label
  Returns:
    a Time object representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getTime(java.lang.String)`

### getTimestamp

    java.sql.Timestamp getTimestamp(int columnIndex,
                                    java.util.Calendar cal)
                                    throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a Timestamp object.

  Parameters:
    `columnIndex` - the column index
    `cal` - the Calendar to use in constructing the Date
  Returns:
    a Timestamp object representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getTimestamp(int, java.util.Calendar)`

### getTimestamp

    java.sql.Timestamp getTimestamp(int columnIndex)
                                    throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a Timestamp object.

  Parameters:
    `columnIndex` - the column index
  Returns:
    a Timestamp object representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getTimestamp(int)`

### getTimestamp

    java.sql.Timestamp getTimestamp(java.lang.String columnLabel,
                                    java.util.Calendar cal)
                                    throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a Timestamp object.

  Parameters:
    `columnLabel` - the column label
    `cal` - the Calendar to use in constructing the Date
  Returns:
    a Timestamp object representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getTimestamp(java.lang.String, java.util.Calendar)`

### getTimestamp

    java.sql.Timestamp getTimestamp(java.lang.String columnLabel)
                                    throws InvalidResultSetAccessException

  Retrieves the value of the indicated column in the current row as a Timestamp object.

  Parameters:
    `columnLabel` - the column label
  Returns:
    a Timestamp object representing the column value
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getTimestamp(java.lang.String)`

### absolute

    boolean absolute(int row)
                     throws InvalidResultSetAccessException

  Moves the cursor to the given row number in the RowSet, just after the last row.

  Parameters:
    `row` - the number of the row where the cursor should move
  Returns:
    true if the cursor is on the RowSet, false otherwise
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.absolute(int)`

### afterLast

    void afterLast()
                   throws InvalidResultSetAccessException

  Moves the cursor to the end of this RowSet.

  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.afterLast()`

### beforeFirst

    void beforeFirst()
                     throws InvalidResultSetAccessException

  Moves the cursor to the front of this RowSet, just before the first row.

  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.beforeFirst()`

### first

    boolean first()
                  throws InvalidResultSetAccessException

  Moves the cursor to the first row of this RowSet.

  Returns:
    true if the cursor is on a valid row, false otherwise
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.first()`

### getRow

    int getRow()
               throws InvalidResultSetAccessException

  Retrieves the current row number.

  Returns:
    the current row number
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.getRow()`

### isAfterLast

    boolean isAfterLast()
                        throws InvalidResultSetAccessException

  Retrieves whether the cursor is after the last row of this RowSet.

  Returns:
    true if the cursor is after the last row, false otherwise
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.isAfterLast()`

### isBeforeFirst

    boolean isBeforeFirst()
                          throws InvalidResultSetAccessException

  Retrieves whether the cursor is after the first row of this RowSet.

  Returns:
    true if the cursor is after the first row, false otherwise
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.isBeforeFirst()`

### isFirst

    boolean isFirst()
                    throws InvalidResultSetAccessException

  Retrieves whether the cursor is on the first row of this RowSet.

  Returns:
    true if the cursor is after the first row, false otherwise
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.isFirst()`

### isLast

    boolean isLast()
                   throws InvalidResultSetAccessException

  Retrieves whether the cursor is on the last row of this RowSet.

  Returns:
    true if the cursor is after the last row, false otherwise
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.isLast()`

### last

    boolean last()
                 throws InvalidResultSetAccessException

  Moves the cursor to the last row of this RowSet.

  Returns:
    true if the cursor is on a valid row, false otherwise
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.last()`

### next

    boolean next()
                 throws InvalidResultSetAccessException

  Moves the cursor to the next row.

  Returns:
    true if the new row is valid, false if there are no more rows
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.next()`

### previous

    boolean previous()
                     throws InvalidResultSetAccessException

  Moves the cursor to the previous row.

  Returns:
    true if the new row is valid, false if it is off the RowSet
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.previous()`

### relative

    boolean relative(int rows)
                     throws InvalidResultSetAccessException

  Moves the cursor a relative number f rows, either positive or negative.

  Returns:
    true if the cursor is on a row, false otherwise
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.relative(int)`

### wasNull

    boolean wasNull()
                    throws InvalidResultSetAccessException

  Reports whether the last column read had a value of SQL `NULL`. Note that you must first call one of the getter methods and then call the `wasNull` method.

  Returns:
    true if the most recent coumn retrieved was SQL `NULL`, false otherwise
  Throws:
    `InvalidResultSetAccessException`
  See Also:
    `ResultSet.wasNull()`

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