Important
The SingleStore 9.1 release candidate (RC) is available now. It will be promoted to general availability (GA) soon and at that time it will be renamed to SingleStore 10.
In the interim, SingleStore 9.1 RC can be used to preview, evaluate, and provide feedback on the new and upcoming features in SingleStore 10, while SingleStore 9.0 is recommended for production workloads.
IS_
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The IS_ function returns a TINYINT 1 for nullable BSON input values, and returns a TINYINT 0 for other values.
By default, empty values, BSON NULL, and BSON Undefined are interpreted as nullable.
Syntax
IS_BSON_NULL(<value>)Argument
<value>: A valid BSON value or an expression that evaluates to a valid BSON value.
Return Type
SingleStore TINYINT type.
Remarks
The following table specifies the value returned by IS_ function for each input value:
|
Input Value |
Output Value |
|---|---|
|
|
1 |
|
BSON |
1 |
|
BSON |
1 |
|
Any other value |
0 |
Examples
Here are a few examples that demonstrate the behavior of IS_ function:
SELECT IS_BSON_NULL(NULL) AS Result;
+--------+
| Result |
+--------+
| 1 |
+--------+SELECT IS_BSON_NULL('null':>BSON) AS Result;
+--------+
| Result |
+--------+
| 1 |
+--------+SELECT IS_BSON_NULL('{"$undefined":true}':>BSON) AS Result;
+--------+
| Result |
+--------+
| 1 |
+--------+SELECT IS_BSON_NULL('"random string"') AS Result;
+--------+
| Result |
+--------+
| 0 |
+--------+SELECT IS_BSON_NULL(1234) AS Result;
+--------+
| Result |
+--------+
| 0 |
+--------+Last modified: