ALTER SQL_PARSER RULE

描述

ALTER SQL_PARSER RULE 语法用于修改解析引擎规则配置

语法

语法 铁路图

AlterSqlParserRule ::=
  'ALTER' 'SQL_PARSER' 'RULE' 'SQL_COMMENT_PARSE_ENABLE' '=' sqlCommentParseEnable ',' 'PARSE_TREE_CACHE' parseTreeCacheDefinition ',' 'SQL_STATEMENT_CACHE' sqlStatementCacheDefinition
sqlCommentParseEnable ::=
  boolean
parseTreeCacheDefinition ::=
  '(' 'INITIAL_CAPACITY' '=' initialCapacity ',' 'MAXIMUM_SIZE' '=' maximumSize ',' 'CONCURRENCY_LEVEL' '=' concurrencyLevel ')'
sqlStatementCacheDefinition ::=
  '(' 'INITIAL_CAPACITY' '=' initialCapacity ',' 'MAXIMUM_SIZE' '=' maximumSize ',' 'CONCURRENCY_LEVEL' '=' concurrencyLevel ')'
initialCapacity ::=
  int
maximumSize ::=
  int
concurrencyLevel ::=
  int

补充说明

• SQL_COMMENT_PARSE_ENABLE：是否解析 SQL 注释

• PARSE_TREE_CACHE：语法树本地缓存配置

• SQL_STATEMENT_CACHE：SQL 语句本地缓存配置项

示例

• 修改解析引擎规则配置

ALTER SQL_PARSER RULE 
  SQL_COMMENT_PARSE_ENABLE=false, 
  PARSE_TREE_CACHE(INITIAL_CAPACITY=10, MAXIMUM_SIZE=11, CONCURRENCY_LEVEL=1), 
  SQL_STATEMENT_CACHE(INITIAL_CAPACITY=11, MAXIMUM_SIZE=11, CONCURRENCY_LEVEL=100);

保留字

ALTER、SQL_PARSER、RULE、SQL_COMMENT_PARSE_ENABLE、PARSE_TREE_CACHE、INITIAL_CAPACITY、MAXIMUM_SIZE、CONCURRENCY_LEVEL、SQL_STATEMENT_CACHE

相关链接

• 保留字