Fix bug 3303

[tristaZero]

Fixes #3303 .

[coveralls]

Pull Request Test Coverage Report for Build 685

• 3 of 3 (100.0%) changed or added relevant lines in 1 file are covered.
• 118 unchanged lines in 22 files lost coverage.
• Overall coverage increased (+0.002%) to 67.861%

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Files with Coverage Reduction	New Missed Lines	%
sharding-jdbc/sharding-jdbc-core/src/main/java/org/apache/shardingsphere/shardingjdbc/jdbc/core/statement/EncryptPreparedStatement.java	1	42.5%
sharding-jdbc/sharding-jdbc-core/src/main/java/org/apache/shardingsphere/shardingjdbc/jdbc/core/statement/MasterSlaveStatement.java	1	10.2%
sharding-jdbc/sharding-jdbc-core/src/main/java/org/apache/shardingsphere/shardingjdbc/jdbc/core/statement/ShardingStatement.java	1	40.32%
sharding-proxy/sharding-proxy-transport/sharding-proxy-transport-postgresql/src/main/java/org/apache/shardingsphere/shardingproxy/transport/postgresql/packet/command/query/binary/bind/protocol/PostgreSQLStringBinaryProtocolValue.java	1	0.0%
sharding-ui/sharding-ui-backend/src/main/java/org/apache/shardingsphere/ui/security/UserAuthenticationService.java	1	0.0%
sharding-ui/sharding-ui-backend/src/main/java/org/apache/shardingsphere/ui/util/ConfigurationYamlConverter.java	1	0.0%
sharding-proxy/sharding-proxy-backend/src/main/java/org/apache/shardingsphere/shardingproxy/backend/communication/jdbc/wrapper/StatementExecutorWrapper.java	2	2.38%
sharding-proxy/sharding-proxy-frontend/sharding-proxy-frontend-core/src/main/java/org/apache/shardingsphere/shardingproxy/frontend/command/CommandExecutorTask.java	2	0.0%
sharding-jdbc/sharding-jdbc-core/src/main/java/org/apache/shardingsphere/shardingjdbc/jdbc/core/statement/MasterSlavePreparedStatement.java	3	6.49%
sharding-proxy/sharding-proxy-frontend/sharding-proxy-frontend-mysql/src/main/java/org/apache/shardingsphere/shardingproxy/frontend/mysql/command/query/text/query/MySQLComQueryPacketExecutor.java	3	0.0%

Totals
Change from base Build 484:	0.002%
Covered Lines:	11305
Relevant Lines:	16659

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💛 - Coveralls