Logical operators

Timestream for LiveAnalytics supports the following logical operators.

Operator	Description	Example
AND	True if both values are true	a AND b
OR	True if either value is true	a OR b
NOT	True if the value is false	NOT a

• The result of an AND comparison may be NULL if one or both sides of the expression are NULL.

• If at least one side of an AND operator is FALSE the expression evaluates to FALSE.

• The result of an OR comparison may be NULL if one or both sides of the expression are NULL.

• If at least one side of an OR operator is TRUE the expression evaluates to TRUE.

• The logical complement of NULL is NULL.

The following truth table demonstrates the handling of NULL in AND and OR:

A	B	A and b	A or b
null	null	null	null
false	null	false	null
null	false	false	null
true	null	null	true
null	true	null	true
false	false	false	false
true	false	false	true
false	true	false	true
true	true	true	true

The following truth table demonstrates the handling of NULL in NOT:

A	Not a
null	null
true	false
false	true