Retro Eye care Haitian Deep Dark Default

ALTER SQL_PARSER RULE

Description

The ALTER SQL_PARSER RULE syntax is used to alter sql parser rule configuration.

Syntax

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

Supplement

  • SQL_COMMENT_PARSE_ENABLE: whether to parse the SQL comment

  • PARSE_TREE_CACHE: local cache configuration of syntax tree

  • SQL_STATEMENT_CACHE: local cache of SQL statement

Example

  • Alter sql parser rule
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)；

Reserved word

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