* Alias 改写,对应于 Interpreter 链路下的 QueryNormalizer;QueryAnalyzer 查询语义进行分析和校验,将 AST 抽象成出结构化的数据结构,为下一步构建 plan 提供数据。在该模块中标准 SQL 和 Clickhouse SQL 进行... 它比较适合于带有上下文依赖的优化规则,例如 PredicatePushDown,需要把 Predicate 一层层的往下推。* **基于 pattern-match 的改写框架:**这种适合简单、通用的改写规则,例如对于两个连续的 Filter 做合并的动...
统一使用相同的上下文executionContext作为执行方法的入参。 对于流程中的request和response,我们可以放入executionContext中,让每个执行节点都可以通过上下文操作response。````// Delegation -type Delegation interface { Execute(ctx context.Context, executionContext ExecutionContextInterface) apperror.AppError TryExecute(ctx context.Context, executionContext ExecutionContextInterface) apperr...
SeaTunnel 是 Apache 软件基金会下的一个高性能开源大数据集成工具,为数据集成场景提供灵活易用、易扩展并支持千亿级数据集成的解决方案。- Seaunnel 为实时(CDC)和批量数据提供高性能数据同步能力,[支持十种以上数据源](https://seatunnel.apache.org/docs/2.3.1/Connector-v2-release-state),已经在B站、腾讯云、字节等数百家公司使用。 - 可以选择 SeaTunnel Zeta 引擎上运行,也可以在 Apache Flink 或 Spark 引擎上运行。...
使用过滤器上下文(Filter)替代查询上下文(Query)。** * `Filter`不会进行打分操作,而`Must`会。* `Filter`查询可以被缓存,从而提高查询性能。正例:```// 创建BoolQueryBuilder BoolQueryBuilder boolQu... boolQuery.filter(QueryBuilders.termQuery(EsNewApplyDocumentFields.IS_DEL, 0)); TermsAggregationBuilder termsAggregationBuilder = AggregationBuilders.terms("spuIdAgg").field("spuId").order(Bucket...
使用过滤器上下文(Filter)替代查询上下文(Query)。** * `Filter`不会进行打分操作,而`Must`会。* `Filter`查询可以被缓存,从而提高查询性能。正例:```// 创建BoolQueryBuilder BoolQueryBuilder boolQu... boolQuery.filter(QueryBuilders.termQuery(EsNewApplyDocumentFields.IS_DEL, 0)); TermsAggregationBuilder termsAggregationBuilder = AggregationBuilders.terms("spuIdAgg").field("spuId").order(Bucket...
INTO 64 BUCKETS AST StatementShows the execution plan of a statement. Dumps the query AST.Syntax sql AST queryOutput Column Description explain The parsedASTof the statement Example sql AST SEL... the asterisk is expanded to a list of all table columns (excluding the MATERIALIZED and ALIAS columns). Set StatementSet a list of settings for the current session.Syntax sql SET [settingExprList]...
you can rely on the order of execution. This applies to cases when SELECT comes from a subquery that uses ORDER BY. When a SELECT query has the GROUP BY clause or at least one aggregate function, B... medianThe median* functions are the aliases for the corresponding quantile* functions. They calculate median of a numeric data sample. Functions: median — Alias for quantile. medianDeterministic —...
鉴权失败 BIM_SERVER_NOT_FRIEND 56 不是好友 BIM_SERVER_DUPLICATE_APPLY 57 重复发起好友申请 BIM_SERVER_NOT_APPLYING 58 不是申请中,无法修改好友状态 BIM_SERVER_UPDATE_FREQUENT 59 更新有并发问题 BIM_SERV... ALIAS_TOO_LONG 68 好友备注过长 BIM_SERVER_ALIAS_ILLEGAL 69 好友备注被风控拦截 BIM_SERVER_TRIAL_VERSION_DAU_COUNT_MORE_THAN_LIMIT 72 试用版 DAU 超过个数限制,参看计费规则。 BIM_PARAMETER_ERROR 10001 参...
会话不存在 BIM_SERVER_APP_NOT_NORMAL(51,"app not normal") app 已经被停用或者删除 BIM_SERVER_MASS_MANAGER_MORE_THAN_LIMIT(52,"live_manager_more_than_limit") 直播群管理员超过限制 BIM_SERVER_MEMBER_BL... 不允许将自己添加到黑名单 BIM_SERVER_ALIAS_TOO_LONG(68, "alias too long") 好友备注过长 BIM_SERVER_ALIAS_ILLEGAL(69, "alias illegal") 好友备注被风控拦截 BIM_SERVER_TRIAL_VERSION_DAU_COUNT_MORE_THAN_L...
it is applied to both startdate and enddate. If not specified, timezones of startdate and enddate are used. If they are not the same, the result is unspecified. String. Example sql SELECT dateDiff(... execution. The same as ‘toDate(now())’. Syntax sql today()Returned value Date. Example sql SELECT today()weekAlias to ToWeek yearAlias to toYear yearweekReturns year and week for a date. The year ...
慢日志记录查询结果的上下文,需要加载更多慢日志记录时使用。 说明 调用 DescribeSlowLogs 接口后,您可以根据返回参数 ListOver 的值来确定是否还有未加载的慢日志记录: 若 ListOver 的值为 false,表示还有符合查... "ExecutionStartTime": "2022-07-26T12:37:38Z", "HostAddress": "172.22.***.***:47502", "InstanceId": "redis-redis-cn02sg5o56sbs****", "Node...