适用于线上内存监控框架KOOM源码分析 | 社区征文MonitorLog.i(TAG, "[meet condition] " + "overThresholdCount: $mOverThresholdCount" + ", heapRatio: $heapRatio" + ", usedMem: ${SizeUnit.BYTE.toMB(SystemInfo.javaHeap.used)}mb" + ", max: ${SizeUnit.BYTE.toMB(SystemInfo.javaHeap.max)}mb") } else { reset() } mLastHeapRatio = heapRatio return mOverThresholdCount >= monitorConf...
SQL StatementsPartition by columns and order by columns are not allowed to drop.Syntax sql ALTER TABLE [tableIdentifier] DROP COLUMN [IF EXISTS] column_name;IF EXISTS clause is specified, the query won’t return... Example sql Step 1: create a tableCREATE TABLE `example_table`( `order_by_column` String)ENGINE = `CnchMergeTree`ORDER BY (`order_by_column`) step 2: create a view based on the created tableCRE...
禁用关键词列表boolean, both, btree, by, bytecache, call, cascade, cascaded, case, cast, catalog_name, chain, change, changed, channel, char, character, charset, check, checksum, cipher, class_origin, client, close, coalesce, code, collate, collation, column, column_format, column_name, columns, comment, commit, committed, compact, completion, compressed, compression, concurrent, condition, connection, consis...
禁用关键词列表sum,cipher,class_origin,client,close,coalesce,code,collate,collation,column,column_format,column_name,columns,comment,commit,committed,compact,completion,compressed,compression,concurrent,condition,... nvarchar offset,on,one,only,open,optimize,optimizer_costs,option,optionally,options,or,order,out,outer,outfile,owner pack_keys,page,parse_gcol_expr,parser,partial,partition,partitioning,partitions,p...