emphasis on data list. • Hint based shadow algorithm Routing to shadow database by recognizing comments from SQL. Suitable for stress test driven by the identification of upstream system passage. 3 file as needed. Parameters rules: - !SQL_PARSER sqlCommentParseEnabled: # Whether to parse SQL comments sqlStatementCache: # SQL statement local cache initialCapacity: # Initial capacity of local cache Attributes: name DataType Description sqlCommentParseEnabled (?) boolean Whether to parse SQL comments parseTreeCache (?) CacheOption Parse syntax tree local cache configuration sqlStatementCache (

emphasis on data list. • Hint based shadow algorithm Routing to shadow database by recognizing comments from SQL. Suitable for stress test driven by the identification of upstream system passage. 3 file as needed. Parameters rules: - !SQL_PARSER sqlCommentParseEnabled: # Whether to parse SQL comments sqlStatementCache: # SQL statement local cache initialCapacity: # Initial capacity of local cache Attributes: name DataType Description sqlCommentParseEnabled (?) boolean Whether to parse SQL comments parseTreeCache (?) CacheOption Parse syntax tree local cache configuration sqlStatementCache (

emphasis on data list. • Hint based shadow algorithm Routing to shadow database by recognizing comments from SQL. Suitable for stress test driven by the identification of upstream system passage. 8 configuration file as needed. Parameters sqlParser: sqlCommentParseEnabled: # Whether to parse SQL comments sqlStatementCache: # SQL statement local cache initialCapacity: # Initial capacity of local cache Attributes: name DataType Description sqlCommentParseEnabled (?) boolean Whether to parse SQL comments parseTreeCache (?) CacheOption Parse syntax tree local cache configuration sqlStatementCache (

Attributes： name DataType Description sqlCommentParseEnabled (?) boolean Whether to parse SQL comments parseTreeCache (?) CacheOption Parse syntax tree local cache configuration sqlStatementCache ( Configuration Item Explanation rules: - !SQL_PARSER sqlCommentParseEnabled: # Whether to parse SQL comments sqlStatementCache: # SQL statement local cache initialCapacity: # Initial capacity of local cache Explanation spring.shardingsphere.rules.sql-parser.sql-comment-parse-enabled= # Whether to parse SQL comments spring.shardingsphere.rules.sql-parser.sql-statement-cache.initial-capacity= # Initial capacity

emphasis on data list. • Hint based shadow algorithm Routing to shadow database by recognizing comments from SQL. Suitable for stress test driven by the identification of upstream system passage. 8 Use specification The SQL Hint syntax of ShardingSphere needs to be written in SQL in the form of comments. The SQL Hint syntax format only supports /* */ temporarily, and the Hint content needs to start MySQL client to connect, you need to add the -c option to retain comments, and the client defaults to --skip-comments to filter comments. 9.3. Common Configuration 457 Apache ShardingSphere document

Attributes： name DataType Description sqlCommentParseEnabled (?) boolean Whether to parse SQL comments parseTreeCache (?) CacheOption Parse syntax tree local cache configuration sqlStatementCache ( Configuration Item Explanation rules: - !SQL_PARSER sqlCommentParseEnabled: # Whether to parse SQL comments sqlStatementCache: # SQL statement local cache initialCapacity: # Initial capacity of local cache Explanation spring.shardingsphere.rules.sql-parser.sql-comment-parse-enabled= # Whether to parse SQL comments spring.shardingsphere.rules.sql-parser.sql-statement-cache.initial-capacity= # 5.1. ShardingSphere-JDBC

column="post_subject"/>

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sqlCommentParseEnabled 设置 为 true，开启 SQL 注释解析功能。此外，如果使用 MySQL 客户端连接，需要添加 -c 选项保留注释，客 户端默认是 --skip-comments 过滤注释。 参数解释 ShardingSphere SQL Hint 中可以定义如下的属性，为了兼容低版本 SQL Hint 语法，也可以使用别名中 定义的属性： SQL Hint

sqlCommentParseEnabled 设置 为 true，开启 SQL 注释解析功能。此外，如果使用 MySQL 客户端连接，需要添加 -c 选项保留注释，客 户端默认是 --skip-comments 过滤注释。 9.3. 通用配置 383 Apache ShardingSphere document 参数解释 ShardingSphere SQL Hint 中可以定义如下的属性，为了兼容低版本

{value}, {key} = {value} */ SELECT * FROM t_order; 如果使用 MySQL 客户端连接，需要添加 -c 选项保留注释，客户端默认是 --skip-comments 过滤注释。 参数解释 ShardingSphere SQL Hint 中可以定义如下的属性，为了兼容低版本 SQL Hint 语法，也可以使用别名中 定义的属性： SQL Hint