Important
Self-managed SingleStore will soon transition from version 9.1 RC to version 10. This new semantic versioning scheme will provide SingleStore with finer control over engine and feature releases that were not possible with the current versioning scheme.
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 prior to its general availability. Ahead of this transition, SingleStore 9.0 is recommended for production workloads, which can later be upgraded to SingleStore 10.
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: