程序包 ohos.data.resultset

接口 SharedResultSet

所有超级接口:

ResultSet

所有已知实现类:

AbsSharedResultSet

public interface SharedResultSet
extends ResultSet

Provides methods for accessing a database result set obtained by querying the database across processes.

This class extends the ResultSet class. Some methods in this class are implemented by the abstract class AbsSharedResultSet.

从以下版本开始:

3

另请参阅:

AbsSharedResultSet

SystemCapability

SystemCapability.Data#DATA_APPDATAMGR

嵌套类概要

从接口继承的嵌套类/接口 ohos.data.resultset.ResultSet

ResultSet.ColumnType

方法概要

限定符和类型	方法	说明
void	fillBlock(int startRowIndex, SharedBlock block)	Adds the data of a SharedResultSet to a SharedBlock.
SharedBlock	getBlock()	Obtains a block from the SharedResultSet.
boolean	onGo(int oldRowIndex, int newRowIndex)	Called when the position of the result set changes.

从接口继承的方法 ohos.data.resultset.ResultSet

close, getAffectedByUris, getAllColumnNames, getBlob, getColumnCount, getColumnIndexForName, getColumnNameForIndex, getColumnTypeForIndex, getDouble, getExtensions, getFloat, getInt, getLong, getRowCount, getRowIndex, getShort, getString, goTo, goToFirstRow, goToLastRow, goToNextRow, goToPreviousRow, goToRow, isAtFirstRow, isAtLastRow, isClosed, isColumnNull, isEnded, isStarted, registerObserver, setAffectedByUris, setExtensions, unregisterObserver

方法详细资料

getBlock

SharedBlock getBlock()

Obtains a block from the SharedResultSet.

The block contains some data of the SharedResultSet.

返回:

Returns the block if it is found; returns null otherwise.

从以下版本开始:

3

fillBlock

void fillBlock(int startRowIndex,
               SharedBlock block)

Adds the data of a SharedResultSet to a SharedBlock.

This method is used to add the data of a SharedResultSet (starting from the startRowIndex position) to a SharedBlock until all data of the SharedResultSet is added to the SharedBlock or the SharedBlock space is insufficient.

参数:

startRowIndex - Indicates the index in the SharedResultSet. The index starts from 0, indicating the first row.

block - Indicates the block whose data is to be added to the SharedResultSet.

从以下版本开始:

3

onGo

boolean onGo(int oldRowIndex,
             int newRowIndex)

Called when the position of the result set changes.

When the result set is moved to a new position, this method is called to notify the child class of the move result. If false is returned, the result set will be moved to the beforeFirst position.

参数:

oldRowIndex - Indicates the original position of the result set.

newRowIndex - Indicates the new position of the result set.

返回:

Returns true if the result set is moved successfully; returns false otherwise.

从以下版本开始:

3