Question

我在postgres中创建了一个函数，它在循环中有一个查询，迭代n次。我想知道每次迭代的执行时间。（这里给出的是一个类似的功能）

＆＃39; \定时＆＃39;将给出函数调用执行时间，但不完全是循环迭代时间。

create function somefunction()
return something
---
Declare
--
--
BEGIN
for somevalue in something
loop 
insert into table_name
select name,id from sales where name = "John"; --want to know the execution time of this statement
end loop;
return 
END
$$ language plpgsql volatile;

我也尝试在循环中插入语句之前放置EXPLAIN ANALYZE（如下所示）

loop
EXPLAIN ANALYZE insert into table_name
select name,id from sales where name = "John";
end loop;

给出此错误 - 错误：查询没有结果数据的目的地

Answer 1

您可能希望将Sub main() Dim cell As Range Dim validateSht As Worksheet: Set validateSht = Worksheets("validated_status") With Worksheets("To update") With .Range("H1:H" & .Cells(.Rows.Count, "A").End(xlUp).Row) .AdvancedFilter Action:=xlFilterCopy, CopyToRange:=Worksheets("validated_status").Range("A1"), Unique:=True validateSht.Range("B1").value = "validated_status" For Each cell In validateSht.Range("A2", validateSht.Cells(validateSht.Rows.Count, "A").End(xlUp)) Select Case True Case Application.WorksheetFunction.CountIfs(.Cells, cell.value, .Offset(, 1), "pending") > 0 cell.Offset(, 1).value = "pending" Case Application.WorksheetFunction.CountIfs(.Cells, cell.value, .Offset(, 1), "cancelled") > 0 cell.Offset(, 1).value = "rejected" Case Application.WorksheetFunction.CountIfs(.Cells, cell.value, .Offset(, 1), "complete") > 0 cell.Offset(, 1).value = "approved" End Select Next End With End With End Sub的结果存储到记录或字符变量变量中，以便稍后使用该变量查看结果。

这样的事情：

EXPLAIN ANALYZE

然后，您现在可以使用该变量通过使用EXPLAIN ANALYZE insert into table_name select name,id from sales where name = "John" INTO result;或将其插入新表或任何您喜欢的内容来查看执行时间

postgresql循环中的计时

1 个答案: