Multiple query execution plans for query with named parameters

[nicolaepopa]

I am using named parameters to build my queries:

`queryString := 'insert into sch.MyTable(Field1,Field2,Field3) values(@field1,@field2,@field3)'

_, err := sn.DbConn.Exec(queryString,
sql.Named("Field1", myStruct.Field1),
sql.Named("Field2", myStruct.Field2),
sql.Named("Field3", myStruct.Field3)
)`
All fields are strings
Running this multiple times with different sizes of strings result in multiple query plans:

`(@field1 nvarchar(4),@field2 nvarchar(16),@field3 nvarchar(16))

INSERT INTO sch.MyTable (Field1,Field2,Field3)

VALUES (@field1, @field2,@field3);`

The size of the nvarchar field declaration varies depending on the size of the input string and SQL creates a plan for each variation.
Is there something that I can do that would result in a single query plan for this query?

[nicolaepopa]

I have used Glenn Berry's query 13 to identify this issue
https://www.dropbox.com/scl/fi/phyj6sp3cwi6eeglquytq/Azure-SQL-Database-Diagnostic-Information-Queries.sql?rlkey=0rvijqbqr6g91vk0hzax393n7&e=1&dl=0

[shueybubbles]

AFAIK making this work requires moving away from the Go types to a parameter type that's driver-specific which contains the length/size specification. See microsoft#200