org.apache.flink.connector.jdbc.dialect.mysql

类 MySqlDialect

java.lang.Object

org.apache.flink.connector.jdbc.dialect.AbstractDialect

org.apache.flink.connector.jdbc.dialect.mysql.MySqlDialect

所有已实现的接口:

Serializable, JdbcDialect

@Internal
public class MySqlDialect
extends AbstractDialect

JDBC dialect for MySQL.

另请参阅:

序列化表格

嵌套类概要

从类继承的嵌套类/接口 org.apache.flink.connector.jdbc.dialect.AbstractDialect

AbstractDialect.Range

构造器概要

构造器

构造器和说明
MySqlDialect()

方法概要

限定符和类型	方法和说明
String	appendDefaultUrlProperties(String url) Appends default JDBC properties to url for current dialect.
Optional<AbstractDialect.Range>	decimalPrecisionRange()
Optional<String>	defaultDriverName()
String	dialectName() Get the name of jdbc dialect.
String	getLimitClause(long limit) Get limit clause to limit the number of emitted row from the jdbc source.
JdbcRowConverter	getRowConverter(org.apache.flink.table.types.logical.RowType rowType) Get converter that convert jdbc object and Flink internal object each other.
Optional<String>	getUpsertStatement(String tableName, String[] fieldNames, String[] uniqueKeyFields) Mysql upsert query use DUPLICATE KEY UPDATE.
String	quoteIdentifier(String identifier) Quotes the identifier.
Set<org.apache.flink.table.types.logical.LogicalTypeRoot>	supportedTypes() Defines the set of supported types for the dialect.
Optional<AbstractDialect.Range>	timestampPrecisionRange()

从类继承的方法 org.apache.flink.connector.jdbc.dialect.AbstractDialect

getDeleteStatement, getInsertIntoStatement, getRowExistsStatement, getSelectFromStatement, getUpdateStatement, validate

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

MySqlDialect

public MySqlDialect()

方法详细资料

getRowConverter

public JdbcRowConverter getRowConverter(org.apache.flink.table.types.logical.RowType rowType)

从接口复制的说明: JdbcDialect

Get converter that convert jdbc object and Flink internal object each other.

参数:

rowType - the given row type

返回:

a row converter for the database

getLimitClause

public String getLimitClause(long limit)

从接口复制的说明: JdbcDialect

Get limit clause to limit the number of emitted row from the jdbc source.

参数:

limit - number of row to emit. The value of the parameter should be non-negative.

返回:

the limit clause.

defaultDriverName

public Optional<String> defaultDriverName()

返回:

the default driver class name, if user has not configured the driver class name, then this one will be used.

quoteIdentifier

public String quoteIdentifier(String identifier)

从接口复制的说明: JdbcDialect

Quotes the identifier.

Used to put quotes around the identifier if the column name is a reserved keyword or contains characters requiring quotes (e.g., space).

返回:

the quoted identifier.

getUpsertStatement

public Optional<String> getUpsertStatement(String tableName,
                                           String[] fieldNames,
                                           String[] uniqueKeyFields)

Mysql upsert query use DUPLICATE KEY UPDATE.

NOTE: It requires Mysql's primary key to be consistent with pkFields.

We don't use REPLACE INTO, if there are other fields, we can keep their previous values.

返回:

The upsert statement if supported, otherwise None.

dialectName

public String dialectName()

从接口复制的说明: JdbcDialect

Get the name of jdbc dialect.

返回:

the dialect name.

decimalPrecisionRange

public Optional<AbstractDialect.Range> decimalPrecisionRange()

覆盖:

decimalPrecisionRange 在类中 AbstractDialect

返回:

The inclusive range [min,max] of supported precisions for DecimalType columns. None if decimal type is not supported.

timestampPrecisionRange

public Optional<AbstractDialect.Range> timestampPrecisionRange()

覆盖:

timestampPrecisionRange 在类中 AbstractDialect

返回:

The inclusive range [min,max] of supported precisions for TimestampType columns. None if timestamp type is not supported.

supportedTypes

public Set<org.apache.flink.table.types.logical.LogicalTypeRoot> supportedTypes()

从类复制的说明: AbstractDialect

Defines the set of supported types for the dialect. If the dialect supports DECIMAL or TIMESTAMP types, be sure to override AbstractDialect.decimalPrecisionRange() and AbstractDialect.timestampPrecisionRange() respectively.

指定者:

supportedTypes 在类中 AbstractDialect

返回:

a set of logical type roots.

appendDefaultUrlProperties

public String appendDefaultUrlProperties(String url)

从接口复制的说明: JdbcDialect

Appends default JDBC properties to url for current dialect. Some database dialects will set default JDBC properties for performance or optimization consideration, such as MySQL dialect uses 'rewriteBatchedStatements=true' to enable execute multiple MySQL statements in batch mode.

返回:

A JDBC url that has appended the default properties.