[<Name of Missing Index, sysname,>] in non clustered index [Execute SQL Task] Error: The value type (__ComObject) can only be converted to variables of type Object. [ODBC Driver Manager] Data source name not found and no default driver specified [ODBC SQL Server Driver] Invalid Para...
SQL>createindexnormal_empno_idxontest_normal(empno); 索引已创建。 SQL> analyzetabletest_normalcomputestatisticsfortableforallindexesfor allindexed columns; 表已分析。 SQL>selectsubstr(segment_name,1,30) segment_name, bytes/1024/1024 "SizeinMB" 2fromuser_segments 3wheresegment_namein('TEST_NORMAL'...
(1) bit in one and only one of the bit vectors. Now we search using the bitmap index. SELECT COUNT(*) FROM T WHERE C IS NULL; ... Do this by counting the 1 bits in the NULL bit vector. The good things that we can note from this example are that the index is small (a ...
如果没有这个Sort操作,SQL Server会同时开始处理outer input分支和inner input分支,这样是无法使用bitmap的。 我们可以在上面的示例上做一个验证。假如在#alert_asn_shipoverdue有一个clustered index(ORG,ITEM),那示例中的SQL语句执行时会是什么状况?在(ORG,ITEM)上创建clustered index后,执行计划变成下图所示(点击可...
--Hologres SQLCREATEFOREIGNTABLEIFNOTEXISTSpublic.foreign_table( field_valueTEXT, bucketINT8, bitmapBYTEA, dsTEXT, label_idTEXT)serverodps_serveroptions(project_name'${projectName}',table_name'foreign_table_${index}');BEGIN;CREATETABLEIFNOTEXISTSpublic.holo_table( ...
SETTINGS index_granularity = 128; -- 由于标签的行数不会太多,将索引粒度调整适量大小(默认8192) 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 创建base_user 表结构 create table if not exists circle_db.base_user ...
cluster clickhouse_cluster ( label_type String comment '标签id', label_value String comment '标签值', object_bitmap AggregateFunction(groupBitmap, UInt32) comment '标签值' ) engine = AggregatingMergeTree PARTITION BY label_type ORDER BY (label_type, label_value) SETTINGS index_granularity = ...
--Hologres SQL CREATE FOREIGN TABLE IF NOT EXISTS public.foreign_table( field_value TEXT, bucket INT8, bitmap BYTEA, ds TEXT, label_id TEXT ) server odps_server options(project_name '${projectName}', table_name 'foreign_table_${index}'); ...
(2);// would return the rank of 2, which is index 1rr.contains(1000);// will return truerr.contains(7);// will return falseRoaringBitmaprror=RoaringBitmap.or(rr,rr2);// new bitmaprr.or(rr2);//in-place computationbooleanequals=rror.equals(rr);// trueif(!equals)thrownewRuntime...
(), table_code String default -1, field_code String default -1 ) engine = AggregatingMergeTree() partition by (p_date, table_code, field_code) order by (row_key, field_value_string, field_value_long, field_value_double) SETTINGS index_granularity = 128; -- 由于标签的行数不会太多,将...