SCHEMABINDING: You need to use schema qualified names for everything

A simple definition: Schema binding is a mode of ensuring that the objects referenced within a function or view, do not changes their definition in any way tat would crack the binded objects.

With SCHEMABINDING the obstacle is that you need to use schema qualified names for everything. You will get lots of error messages like this

Lets stimulate the same error with the below sample. Here we are creating table without any qualified schema

create table test1

(col1 int,

col2 varchar(10),

col3 varchar(10))

go

Since our table is ready lets try to create a view and refer the above table in it.

 create view vw_test1

with schemabinding

as

select col1,col2 from test1

Msg 4512, Level 16, State 3, Procedure vw_test1, Line 10

Cannot schema bind view 'vw_test1' because name 'test1' is invalid for schema binding. Names must be in two-part format and an object cannot reference itself.

Here we can see our code fall in error, since we have not specified any schema for our view. Lets add a schema and bind our above view to the newly created schema.

create view dbo.vw_test1

with schemabinding

as

select col1,col2 from test1

Msg 4512, Level 16, State 3, Procedure vw_test1, Line 10

Cannot schema bind view 'dbo.vw_test1' because name 'test1' is invalid for schema binding. Names must be in two-part format and an object cannot reference itself.

So you need everything i.e every object to be schema bounded.

Lets drop the table and recreate it with full qualified name

drop table test1

Command(s) completed successfully.

create schema test

Command(s) completed successfully.

create table test.test1

(col1 int,

col2 varchar(10),

col3 varchar(10))

go

Command(s) completed successfully.

Lets now create view with fully qualified name

create view dbo.vw_test1

with schemabinding

as

select col1,col2 from test.test1

Command(s) completed successfully.

col1        col2       col3

----------- ---------- ----------

(0 row(s) affected)

Conclusion: You need to create every object under full qualified name i.e. defined with schema while using SCHEMABINDING option.

Leave everything and do your coding; that’s the way to happiness. Just for SQL lovers :)

Post Reference: Vikram Aristocratic Elfin Share