| // +---+ // create a user defined function tEnv.executeSql("CREATE FUNCTION f1 AS ..."); // show user defined functions tEnv.executeSql("SHOW USER FUNCTIONS").print(); // +---+ // | function name | // +---+ // | f1 | // | ... | // +---+ // show modules...
function name | // +---+ // | mod | // | sha256 | // | ... | // +---+ // create a user defined function tEnv.executeSql("CREATE FUNCTION f1 AS ..."); // show user defined functions tEnv.executeSql("SHOW USER FUNCTIONS").print(); // +---+ // | function name ...
|1| SIMPLE |testa| const |PRIMARY,idx_name| PRIMARY |4| const |1| NULL |+---+---+---+---+---+---+---+---+---+---+1rowinset# 下面虽然name有索引,但是查询的列cusno没有索引,这时mysql计划possible_keys有索引,但实际key未走索引,若果cusno换成有索引的列,参照下面。mysql> expl...
I understand that you are seeking an explanation of the user defined function “sigadd” that you have provided. The function “sigadd” takes four input arguments ‘x1’, ‘n1’, ‘x2’, ‘n2’. The arguments ‘x1’ and ‘n1’ represent the first sequence and its range of indi...
unique_subqueryis just an index lookup function that replaces the subquery completely forbetter efficiency. --子查询中的返回结果字段组合是主键或者唯一约束; 2.2.9 index_subquery This join typeis similar to unique_subquery. It replaces IN subqueries, but it works fornonunique indexes in subqueries...
DFEApply – Executes the function specified by functor in the arguments section, on the value stored in the specified variable DFEAlgoWriteProperty – Explain operator for the property-writing portion of mutate algorithm invocations. DFEBFSAlgo – Explain operator for invocations of the Breadth First...
Typedef declaration do not define new types ; they introduce a synonym for existing type,they don't affect the over loading mechanism. cppfunctionquestionsandoverloadingdeclarationdefinition 2nd Jun 2017, 1:06 PM Jatin Srivastava + 6 This is quite simple actually. Type def is used by variable...
For more information, see Function release notes. Aggregate Aggregate is used to aggregate data. It can be an aggregate function or a combination of multiple aggregate functions. In SQL statements, aggregate operators are classified into the following types: GroupAggregate: Data has been pre-...
\n"+"where rn = 1";/*** 算子 {@link org.apache.flink.streaming.api.operators.KeyedProcessOperator}* -- {@link org.apache.flink.table.runtime.operators.deduplicate.ProcTimeDeduplicateKeepFirstRowFunction}*/for(String innerSql:sql.split(";")){TableResult tableResult=flinkEnv.streamTEnv()....
The following is a sample output of this function: Tablespace Context: --- Name: USERSPACE1 Overhead: 7.500000 Transfer Rate: 0.060000 Prefetch Size: 32 Extent Size: 32 Type: Database managed Partition Group Name: NULLP Buffer Pool Identifier: 0 Base Table Statistics: --- Name: T1 Schema:...