Depending on the function that is used, some rows might receive the same value as other rows. Ranking functions are nondeterministic. Rowset functions Rowset functions Return an object that can be used like table references in a SQL statement. Scalar functions Operate on a single value and ...
See Scalar UDF Inlining. Table variable deferred compilation Improves plan quality and overall performance for queries that reference table variables. During optimization and initial compilation, this feature propagates cardinality estimates that are based on actual table variable row counts. This accurate ...
Scalar UDF Inlining Automatically transforms scalar UDFs into relational expressions and embeds them in the calling SQL query. This transformation improves the performance of workloads that take advantage of scalar UDFs. See Scalar UDF Inlining. Table variable deferred compilation Improves plan quality and...
scalar(query) If you are used to the old query object it can take some time to become familiar with the new way to issue queries, but I personally find the separation between creating and executing queries a great improvement. Once again keep in mind that the legacy queries can still be ...
Scalar UDF Inlining Automatically transforms scalar UDFs into relational expressions and embeds them in the calling SQL query. This transformation improves the performance of workloads that take advantage of scalar UDFs. See Scalar UDF Inlining. Table variable deferred compilation Improves plan quality and...
NDB attempts to identify and evaluate a non-dependent scalar subquery before trying to retrieve any rows from the table to which it is attached. When it can do so, the value obtained is used as part of a pushed condition, instead of using the subquery which provided the value. Beginning...
Scalar UDF Inlining Automatically transforms scalar UDFs into relational expressions and embeds them in the calling SQL query. This transformation improves the performance of workloads that take advantage of scalar UDFs. See Scalar UDF Inlining. Table variable deferred compilation Improves plan quality and...
Function withResult to provide custom stream parser (e.g. SQL("Select name from Books").withResult(customTailrecParser(_, List.empty[String]))). Supports array (java.sql.Array) from column (e.g. SQL("SELECT str_arr FROM tbl").as(scalar[Array[String]].*)) or as parameter (e.g. ...
Scalar UDF InliningAutomatically transforms scalar UDFs into relational expressions and embeds them in the calling SQL query. This transformation improves the performance of workloads that take advantage of scalar UDFs. SeeScalar UDF Inlining. Table variable deferred compilationImproves plan quality and over...
are both used to combine data from different tables into a single result. ... Subqueries can be used to return either a scalar (single) value or a row set; whereas, joins are used to return rows. A common use for a subquery may be to calculate a summary value for use in a query....