SA0188 : The NULL or NOT NULL constraint not explicitly specified in the table column definition |
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The topic describes the SA0188 analysis rule.
MessageThe NULL or NOT NULL constraint not explicitly specified in the table column definition
DescriptionThe checks CREATE TABLE and ALTER TABLE ADD COLUMN statements for table column definitions not having explicit NULL constraint specified.
If the NOT NULL option is not explicitly specified when creating a table, the NULL value will be applied to all columns.
How to fixIt is recommended to always set the availability of empty values in a column when creating a table, or declaring a temporary table, or a table variable.
ScopeThe rule has a Batch scope and is applied only on the SQL script.
ParametersRule has no parameters.
RemarksThe rule does not need Analysis Context or SQL Connection.
Effort To FixCategoriesDesign Rules, Code Smells
Additional InformationThere is no additional info for this rule.
Example Test SQL|
SQL
1CREATE TABLE Test.Greeting 2( 3GreetingId INT IDENTITY (1,1) PRIMARY KEY, 4Message nvarchar(255) NOT NULL, 5) 6 7ALTER TABLE Test.Greeting ADD Column2 INT, Column2 INT NULL 8 9ALTER TABLE dbo.doc_exa ADD column_b VARCHAR(20), column_c INT NULL ; 10 11ALTER TABLE MyTable ALTER COLUMN NullCOl NVARCHAR(20) NOT NULL; |
Analysis Results| Message | Line | Column | |
|---|---|---|---|
| 1 | SA0188 : The NULL or NOT NULL constraint not explicitly specified in the table column definition. | 3 | 0 |
| 2 | SA0188 : The NULL or NOT NULL constraint not explicitly specified in the table column definition. | 7 | 30 |
| 3 | SA0188 : The NULL or NOT NULL constraint not explicitly specified in the table column definition. | 9 | 28 |
See Also