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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

AlterSqlParserRule ::=
  'ALTER' 'SQL_PARSER' 'RULE' 'SQL_COMMENT_PARSE_ENABLE' '=' sqlCommentParseEnable ',' 'PARSE_TREE_CACHE' parseTreeCacheDefination ',' 'SQL_STATEMENT_CACHE' sqlStatementCacheDefination

sqlCommentParseEnable ::=
  boolean

parseTreeCacheDefination ::=
  '(' 'INITIAL_CAPACITY' '=' initialCapacity ',' 'MAXIMUM_SIZE' '=' maximumSize ',' 'CONCURRENCY_LEVEL' '=' concurrencyLevel ')'

sqlStatementCacheDefination ::=
  '(' '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