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| Note | ||
|---|---|---|
| ||
When hive.cache.expr.evaluation is set to true (which is the default) a UDF can give incorrect results if it is nested in another UDF or a Hive function. This bug affects releases 0.12.0, 0.13.0, and 0.13.1. Release 0.14.0 fixed the bug (HIVE-7314). The problem relates to the UDF's implementation of the getDisplayString method, as discussed in the Hive user mailing list. |
Built-in Operators
Operators precedences
Example | Operators | Description |
|---|---|---|
| A[B] , A.identifier | bracket_op([]), dot(.) | element selector, dot |
-A | unary(+), unary(-), unary(~) | unary prefix operators |
| A IS (NOT) NULL | IS NULL,IS NOT NULL | unary suffix |
A ^ B | bitwise xor(^) | bitwise xor |
| A * B | star(*), divide(/), mod(%), div(DIV) | multiplicative operators |
| A + B | plus(+), minus(-) | additive operators |
| A || B | string concatenate(||) | string concatenate |
| A & B | bitwise and(&) | bitwise and |
| A | B | bitwise or(|) | bitwise or |
Relational Operators
The following operators compare the passed operands and generate a TRUE or FALSE value depending on whether the comparison between the operands holds.
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