| From: | PG Doc comments form <noreply(at)postgresql(dot)org> |
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| To: | pgsql-docs(at)lists(dot)postgresql(dot)org |
| Cc: | pramodsavant2001(at)gmail(dot)com |
| Subject: | Mathematical Functions and Operators |
| Date: | 2024-09-08 04:43:01 |
| Message-ID: | 172577058189.711.5933453138059481244@wrigleys.postgresql.org |
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The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/16/functions-math.html
Description:
Typically, exponentiation (which is represented here by ^) is a
right-associative operation. This means that the expression 2 ^ 3 ^ 3 should
be interpreted as
2 ^ (3 ^ 3) rather than (2 ^ 3) ^ 3.
Correct Interpretation (right-associative):
2 ^ 3 ^ 3 is interpreted as 2 ^ (3 ^ 3), which equals 2 ^ 27 = 134217728.
However, the example provided assumes left-associative behavior:
Incorrect Interpretation (left-associative):
2 ^ 3 ^ 3 is incorrectly interpreted as (2 ^ 3) ^ 3 = 512.
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