org.apache.flink.connector.jdbc.split

类 JdbcNumericBetweenParametersProvider

java.lang.Object

org.apache.flink.connector.jdbc.split.JdbcNumericBetweenParametersProvider

所有已实现的接口:

JdbcParameterValuesProvider

@Experimental
public class JdbcNumericBetweenParametersProvider
extends Object
implements JdbcParameterValuesProvider

This query parameters generator is an helper class to parameterize from/to queries on a numeric column. The generated array of from/to values will be equally sized to fetchSize (apart from the last one), ranging from minVal up to maxVal.

For example, if there's a table BOOKS with a numeric PK id, using a query like:

 SELECT * FROM BOOKS WHERE id BETWEEN ? AND ?
 

You can take advantage of this class to automatically generate the parameters of the BETWEEN clause, based on the passed constructor parameters.

构造器概要

构造器

构造器和说明
JdbcNumericBetweenParametersProvider(long minVal, long maxVal) NumericBetweenParametersProviderJdbc constructor.
JdbcNumericBetweenParametersProvider(long fetchSize, long minVal, long maxVal) NumericBetweenParametersProviderJdbc constructor.

方法概要

限定符和类型	方法和说明
Serializable[][]	getParameterValues() Returns the necessary parameters array to use for query in parallel a table.
JdbcNumericBetweenParametersProvider	ofBatchNum(int batchNum)
JdbcNumericBetweenParametersProvider	ofBatchSize(long batchSize)

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

JdbcNumericBetweenParametersProvider

public JdbcNumericBetweenParametersProvider(long minVal,
                                            long maxVal)

NumericBetweenParametersProviderJdbc constructor.

参数:

minVal - the lower bound of the produced "from" values

maxVal - the upper bound of the produced "to" values

JdbcNumericBetweenParametersProvider

public JdbcNumericBetweenParametersProvider(long fetchSize,
                                            long minVal,
                                            long maxVal)

NumericBetweenParametersProviderJdbc constructor.

参数:

fetchSize - the max distance between the produced from/to pairs

minVal - the lower bound of the produced "from" values

maxVal - the upper bound of the produced "to" values

方法详细资料

ofBatchSize

public JdbcNumericBetweenParametersProvider ofBatchSize(long batchSize)

ofBatchNum

public JdbcNumericBetweenParametersProvider ofBatchNum(int batchNum)

getParameterValues

public Serializable[][] getParameterValues()

从接口复制的说明: JdbcParameterValuesProvider

Returns the necessary parameters array to use for query in parallel a table.

指定者:

getParameterValues 在接口中 JdbcParameterValuesProvider