Fix Navicat connect Sharding-Proxy no primary key error.

[dongzl]

Fixes #3005

Changes proposed in this pull request:

• ColumnMetaData class add notNull & autoIncrement field, to return column detail flags.
• QueryHeader class add signed, primaryKey, nullable, autoIncrement field.
• add MySQLColumnFieldDetailFlag class, is a enum class for table column all flag type.

This PR only solve this problem in sharding scenario.
If no Sharding, only Master-Slave, this error will still occur, because Master-Slave scenario, the TableMeta will not be pre loaded.

[coveralls]

Pull Request Test Coverage Report for Build 760

• 30 of 74 (40.54%) changed or added relevant lines in 14 files are covered.
• 9 unchanged lines in 4 files lost coverage.
• Overall coverage decreased (-0.0006%) to 68.423%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
sharding-core/sharding-core-common/src/main/java/org/apache/shardingsphere/core/metadata/column/EncryptColumnMetaData.java	0	1	0.0%
sharding-core/sharding-core-common/src/main/java/org/apache/shardingsphere/core/metadata/column/ShardingGeneratedKeyColumnMetaData.java	0	1	0.0%
sharding-proxy/sharding-proxy-backend/src/main/java/org/apache/shardingsphere/shardingproxy/backend/text/sctl/explain/ShardingCTLExplainBackendHandler.java	0	2	0.0%
sharding-core/sharding-core-execute/src/main/java/org/apache/shardingsphere/core/execute/metadata/TableMetaDataLoader.java	0	6	0.0%
sharding-proxy/sharding-proxy-backend/src/main/java/org/apache/shardingsphere/shardingproxy/backend/response/query/QueryHeader.java	12	18	66.67%
sharding-proxy/sharding-proxy-frontend/sharding-proxy-frontend-mysql/src/main/java/org/apache/shardingsphere/shardingproxy/frontend/mysql/command/query/text/query/MySQLComQueryPacketExecutor.java	0	11	0.0%
sharding-proxy/sharding-proxy-transport/sharding-proxy-transport-mysql/src/main/java/org/apache/shardingsphere/shardingproxy/transport/mysql/packet/command/query/MySQLColumnFieldDetailFlag.java	0	17	0.0%

Files with Coverage Reduction	New Missed Lines	%
sharding-core/sharding-core-common/src/main/java/org/apache/shardingsphere/core/metadata/column/ShardingGeneratedKeyColumnMetaData.java	1	0.0%
sharding-proxy/sharding-proxy-backend/src/main/java/org/apache/shardingsphere/shardingproxy/backend/text/sctl/explain/ShardingCTLExplainBackendHandler.java	1	0.0%
sharding-spring/sharding-jdbc-orchestration-spring/sharding-jdbc-orchestration-spring-boot-starter/src/main/java/org/apache/shardingsphere/shardingjdbc/orchestration/spring/boot/OrchestrationSpringBootConfiguration.java	3	93.02%
sharding-spring/sharding-jdbc-spring/sharding-jdbc-spring-boot-starter/src/main/java/org/apache/shardingsphere/shardingjdbc/spring/boot/SpringBootConfiguration.java	4	85.71%

Totals
Change from base Build 510:	-0.0006%
Covered Lines:	11467
Relevant Lines:	16759

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💛 - Coveralls

[tuohai666]

Please check why the Coverage decreased.

[dongzl]

I have added test case about the modified class files. But Coverage still decreased.

The org.apache.shardingsphere.shardingjdbc.spring.boot.SpringBootConfiguration case this problem, but I don't modified this file.

and how to increase the coverage?

[tuohai666]

I have added test case about the modified class files. But Coverage still decreased.

The org.apache.shardingsphere.shardingjdbc.spring.boot.SpringBootConfiguration case this problem, but I don't modified this file.

and how to increase the coverage?

I think we can ignore that file.