* Rename PhysicalSchemaMetaData to ShardingSphereSchema

* Fix checkstyle

* Add PhysicalTableMetaData.addressingDataSources

* Refactor AllSQLRouteExecutor

* Refactor ShardingDDLStatementValidator

* Refactor ShardingDDLStatementValidator

* Refactor SingleTableRoutingEngine

* Refactor MetaDataRefreshStrategy

* Remove ShardingSphereSchema.tableAddressingMetaData

* Remove useless ReplicaQueryTableAddressingMetaDataDecorator

* Switch class name of ShardingSphereMetaData and ShardingSphereSchema

* Adjust seq of ShardingSphereMetaData's constructor

* Remove LogicSchemaMetaData.unconfiguredSchemaMetaDataMap

* Remove LogicSchemaMetaData

* Rename LogicSchemaMetaDataLoader

* Add metadata.schema package

* Fix spi

* Rename SchemaMetaDataLoader

* Rename SchemaMetaDataNotifier

* support create and drop view refresh meta data

* support function and procedure all databases route

* Rename metadata.model.physical package

* Rename JDBCSchemaHandler

* rename PhysicalXXXMetaData

* Rename database.model

* Rename package name from metadata.schema to metadata.rule

* Rename package name from metadata.database to metadata.schema

* Add package name metadata.model

* Fix spi

* Fix spi

* Fix spi

* Move LogicSQL to binder module

* Move all metadata related to infra-common module

* Use SQLStatement for MetaDataRefreshStrategy

* Use SQLStatement for MetaDataRefreshStrategyFactory

* Move shardingsphere-infra-binder to infra module and rename

* Move shardingsphere-infra-binder to infra module and rename

* rename package name

* refactor change YamlRuleSchemaMetaData same with  RuleSchemaMetaData

* change for cr

* add test of default constructor

* Refactor RuleSchemaMetaData.unconfiguredSchemaMetaDataMap to Map<String,Collection<String>>,  due to unconfigured table only need table name

* fix checkstyle

* fix checkstyle issue

* fix test

* Rename shardingsphere-underlying to shardingsphere-infra

* Rename shardingsphere-infra's subprojects

* Rename shardingsphere-infra's subprojects

* rename package from org.apache.shardingsphere.underlying.common to org.apache.shardingsphere.infra

* rename package from org.apache.shardingsphere.underlying.executor to org.apache.shardingsphere.infra.executor

* rename package from org.apache.shardingsphere.underlying.merge to org.apache.shardingsphere.infra.merge

* rename package from org.apache.shardingsphere.underlying.route to org.apache.shardingsphere.infra.route

* rename package from org.apache.shardingsphere.underlying.rewrite to org.apache.shardingsphere.infra.rewrite

* fix example

* Add single data source API for OrchestrationShardingDataSourceFactory

* Add single data source API for OrchestrationShardingDataSourceFactory

* Add dataSourceMap for MetaDataRefreshStrategy

* Fix bug: cannot refresh unconfigured table meta data

* sharding-jdbc and sharding-proxy use same metaData refresh strategy.

* let an empty line.

* add final to class if not extend.

* remove SingleDataSourceRuntimeContext

* remove MultipleDataSourcesRuntimeContext

* move package

* refactor AbstractRuntimeContext's constructor

* Add RuleSchemaMetaData

* Load unconfigured schema meta data

* add SPI for TableMetaDataDecorator

* add spi package

* rename TableMetaDataDecorator to RuleTableMetaDataDecorator

* refactor RuleTableMetaDataDecorator

* refactor RuleTableMetaDataDecorator

* refactor TableMetaData

* remove useless exception

* add ShardingTableMetadataLoader

* add RuleSchemaMetaDataLoader

* remove ShardingMetaDataLoader

* move metadata decorator and loader to schema package

* rename RuleMetaDataLoader to RuleTableMetaDataLoader

* add SPI for RuleTableMetaDataLoader

* add package org.apache.shardingsphere.shardingjdbc.jdbc.refreh.impl

* rename SQLStatementMetaDataRefreshStrategyFactory to MetaDataRefreshStrategyFactory

* refactor MetaDataRefreshStrategyFactory

* refactor MetaDataRefreshStrategy's generic

* refactor MetaDataRefreshStrategy's generic

* refactor MetaDataRefreshStrategy's generic

* refactor MetaDataRefreshStrategyFactory

* refactor CreateIndexStatementMetaDataRefreshStrategy

* refactor DropIndexStatementMetaDataRefreshStrategy

* refactor DropTableStatementMetaDataRefreshStrategy

* remove AbstractTableStatementMetaData

* fix test case

* ues strategy pattern modify refresh ShardingMetaData.

* add apache License 2.0 .

* add java doc .

* ues strategy pattern modify refresh ShardingMetaData.

* code review.