org.apache.seatunnel.connectors.seatunnel.jdbc.internal.dialect.mysql

类 MysqlDialect

java.lang.Object

org.apache.seatunnel.connectors.seatunnel.jdbc.internal.dialect.mysql.MysqlDialect

所有已实现的接口:

Serializable, JdbcDialect

public class MysqlDialect
extends Object
implements JdbcDialect

另请参阅:

序列化表格

字段概要

字段

限定符和类型	字段和说明
String	fieldIde

从接口继承的字段 org.apache.seatunnel.connectors.seatunnel.jdbc.internal.dialect.JdbcDialect

log

构造器概要

构造器

构造器和说明
MysqlDialect()
MysqlDialect(String fieldIde)

方法概要

限定符和类型	方法和说明
Long	approximateRowCntStatement(Connection connection, JdbcSourceTable table) Approximate total number of entries in the lookup table.
PreparedStatement	creatPreparedStatement(Connection connection, String queryTemplate, int fetchSize) Different dialects optimize their PreparedStatement
Map<String,String>	defaultParameter()
String	dialectName() Get the name of jdbc dialect.
String	extractTableName(TablePath tablePath)
JdbcDialectTypeMapper	getJdbcDialectTypeMapper() get jdbc meta-information type to seatunnel data type mapper.
JdbcRowConverter	getRowConverter() Get converter that convert jdbc object to seatunnel internal object.
Optional<String>	getUpsertStatement(String database, String tableName, String[] fieldNames, String[] uniqueKeyFields) Constructs the dialects upsert statement if supported; such as MySQL's DUPLICATE KEY UPDATE, or PostgreSQL's {@code ON CONFLICT...
TablePath	parse(String tablePath)
String	quoteDatabaseIdentifier(String identifier) Quotes the identifier for database name or field name
String	quoteIdentifier(String identifier) Quotes the identifier for table name or field name
Object[]	sampleDataFromColumn(Connection connection, JdbcSourceTable table, String columnName, int samplingRate, int fetchSize) Performs a sampling operation on the specified column of a table in a JDBC-connected database.

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.seatunnel.connectors.seatunnel.jdbc.internal.dialect.JdbcDialect

connectionUrlParse, getDeleteStatement, getFieldIde, getInsertIntoStatement, getJdbcConnectionProvider, getResultSetMetaData, getRowExistsStatement, getUpdateStatement, hashModForField, queryNextChunkMax, tableIdentifier, tableIdentifier

字段详细资料

fieldIde

public String fieldIde

构造器详细资料

MysqlDialect

public MysqlDialect()

MysqlDialect

public MysqlDialect(String fieldIde)

方法详细资料

dialectName

public String dialectName()

从接口复制的说明: JdbcDialect

Get the name of jdbc dialect.

指定者:

dialectName 在接口中 JdbcDialect

返回:

the dialect name.

getRowConverter

public JdbcRowConverter getRowConverter()

从接口复制的说明: JdbcDialect

Get converter that convert jdbc object to seatunnel internal object.

指定者:

getRowConverter 在接口中 JdbcDialect

返回:

a row converter for the database

getJdbcDialectTypeMapper

public JdbcDialectTypeMapper getJdbcDialectTypeMapper()

从接口复制的说明: JdbcDialect

get jdbc meta-information type to seatunnel data type mapper.

指定者:

getJdbcDialectTypeMapper 在接口中 JdbcDialect

返回:

a type mapper for the database

quoteIdentifier

public String quoteIdentifier(String identifier)

从接口复制的说明: JdbcDialect

Quotes the identifier for table name or field name

指定者:

quoteIdentifier 在接口中 JdbcDialect

quoteDatabaseIdentifier

public String quoteDatabaseIdentifier(String identifier)

从接口复制的说明: JdbcDialect

Quotes the identifier for database name or field name

指定者:

quoteDatabaseIdentifier 在接口中 JdbcDialect

getUpsertStatement

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

从接口复制的说明: JdbcDialect

Constructs the dialects upsert statement if supported; such as MySQL's DUPLICATE KEY UPDATE, or PostgreSQL's ON CONFLICT... DO UPDATE SET...

If supported, the returned string will be used as a PreparedStatement. Fields in the statement must be in the same order as the fieldNames parameter.

If the dialect does not support native upsert statements, the writer will fallback to SELECT ROW Exists + UPDATE/INSERT which may have poor performance.

指定者:

getUpsertStatement 在接口中 JdbcDialect

返回:

the dialects UPSERT statement or Optional.empty().

creatPreparedStatement

public PreparedStatement creatPreparedStatement(Connection connection,
                                                String queryTemplate,
                                                int fetchSize)
                                         throws SQLException

从接口复制的说明: JdbcDialect

Different dialects optimize their PreparedStatement

指定者:

creatPreparedStatement 在接口中 JdbcDialect

返回:

The logic about optimize PreparedStatement

抛出:

SQLException

extractTableName

public String extractTableName(TablePath tablePath)

指定者:

extractTableName 在接口中 JdbcDialect

defaultParameter

public Map<String,String> defaultParameter()

指定者:

defaultParameter 在接口中 JdbcDialect

parse

public TablePath parse(String tablePath)

指定者:

parse 在接口中 JdbcDialect

sampleDataFromColumn

public Object[] sampleDataFromColumn(Connection connection,
                                     JdbcSourceTable table,
                                     String columnName,
                                     int samplingRate,
                                     int fetchSize)
                              throws SQLException

从接口复制的说明: JdbcDialect

Performs a sampling operation on the specified column of a table in a JDBC-connected database.

指定者:

sampleDataFromColumn 在接口中 JdbcDialect

参数:

connection - The JDBC connection object used to connect to the database.

table - The table in which the column resides.

columnName - The name of the column to be sampled.

samplingRate - samplingRate The inverse of the fraction of the data to be sampled from the column. For example, a value of 1000 would mean 1/1000 of the data will be sampled.

返回:

Returns a List of sampled data from the specified column.

抛出:

SQLException - If an SQL error occurs during the sampling operation.

approximateRowCntStatement

public Long approximateRowCntStatement(Connection connection,
                                       JdbcSourceTable table)
                                throws SQLException

从接口复制的说明: JdbcDialect

Approximate total number of entries in the lookup table.

指定者:

approximateRowCntStatement 在接口中 JdbcDialect

参数:

connection - The JDBC connection object used to connect to the database.

table - table info.

返回:

approximate row count statement.

抛出:

SQLException