What is is the vertical pipe's function in this PostgreSQL statement?
I copied this statement a while back and when looking back over the script--I saw this statement:
SET equal_area_radius = |/area/pi();
I couldn't find in the docs (probably wasn't using the correct vocabulary) where it described this character and its function.
The statement works and it definitely changes the value:
wrk=# select ( |/125.555/pi() );
?column?
------------------
6.32181918120139
(1 row)
wrk=#
wrk=# select ( 125.555/pi() );
?column?
------------------
39.9653977598058
(1 row)
wrk=#
postgresql
asked 4 hours ago
Jay CumminsJay Cummins
17027
add a comment |
I copied this statement a while back and when looking back over the script--I saw this statement:
SET equal_area_radius = |/area/pi();
I couldn't find in the docs (probably wasn't using the correct vocabulary) where it described this character and its function.
The statement works and it definitely changes the value:
wrk=# select ( |/125.555/pi() );
?column?
------------------
6.32181918120139
(1 row)
wrk=#
wrk=# select ( 125.555/pi() );
?column?
------------------
39.9653977598058
(1 row)
wrk=#
postgresql
asked 4 hours ago
Jay CumminsJay Cummins
17027
add a comment |
I copied this statement a while back and when looking back over the script--I saw this statement:
SET equal_area_radius = |/area/pi();
I couldn't find in the docs (probably wasn't using the correct vocabulary) where it described this character and its function.
The statement works and it definitely changes the value:
wrk=# select ( |/125.555/pi() );
?column?
------------------
6.32181918120139
(1 row)
wrk=#
wrk=# select ( 125.555/pi() );
?column?
------------------
39.9653977598058
(1 row)
wrk=#
postgresql
asked 4 hours ago
Jay CumminsJay Cummins
17027
I copied this statement a while back and when looking back over the script--I saw this statement:
SET equal_area_radius = |/area/pi();
I couldn't find in the docs (probably wasn't using the correct vocabulary) where it described this character and its function.
The statement works and it definitely changes the value:
wrk=# select ( |/125.555/pi() );
?column?
------------------
6.32181918120139
(1 row)
wrk=#
wrk=# select ( 125.555/pi() );
?column?
------------------
39.9653977598058
(1 row)
wrk=#
postgresql
postgresql
asked 4 hours ago
Jay CumminsJay Cummins
17027
asked 4 hours ago
Jay CumminsJay Cummins
17027
asked 4 hours ago
Jay CumminsJay Cummins
17027
asked 4 hours ago
Jay CumminsJay Cummins
17027
asked 4 hours ago
Jay CumminsJay Cummins
17027
17027
add a comment |
add a comment |
1 Answer
1
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oldest
votes
The |/ operator calculates the square root
postgres> select |/16, sqrt(16);
?column? | sqrt
----------+------
4 | 4
(1 row)
So |/125.555/pi() is equivalent to sqrt(125.555/pi())
answered 4 hours ago
a_horse_with_no_namea_horse_with_no_name
38.7k775112
Sure enough--looked at the site where I copied the statement from and they had this: i.imgur.com/5twDykK.png I should have worked that one out. Thanks!
– Jay Cummins
4 hours ago
1
@a_horse funny that the|/operator has lower precedence than/an*.
– yper-crazyhat-cubeᵀᴹ
3 hours ago
add a comment |
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1 Answer
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The |/ operator calculates the square root
postgres> select |/16, sqrt(16);
?column? | sqrt
----------+------
4 | 4
(1 row)
So |/125.555/pi() is equivalent to sqrt(125.555/pi())
answered 4 hours ago
a_horse_with_no_namea_horse_with_no_name
38.7k775112
Sure enough--looked at the site where I copied the statement from and they had this: i.imgur.com/5twDykK.png I should have worked that one out. Thanks!
– Jay Cummins
4 hours ago
1
@a_horse funny that the|/operator has lower precedence than/an*.
– yper-crazyhat-cubeᵀᴹ
3 hours ago
add a comment |
The |/ operator calculates the square root
postgres> select |/16, sqrt(16);
?column? | sqrt
----------+------
4 | 4
(1 row)
So |/125.555/pi() is equivalent to sqrt(125.555/pi())
answered 4 hours ago
a_horse_with_no_namea_horse_with_no_name
38.7k775112
Sure enough--looked at the site where I copied the statement from and they had this: i.imgur.com/5twDykK.png I should have worked that one out. Thanks!
– Jay Cummins
4 hours ago
1
@a_horse funny that the|/operator has lower precedence than/an*.
– yper-crazyhat-cubeᵀᴹ
3 hours ago
add a comment |
The |/ operator calculates the square root
postgres> select |/16, sqrt(16);
?column? | sqrt
----------+------
4 | 4
(1 row)
So |/125.555/pi() is equivalent to sqrt(125.555/pi())
answered 4 hours ago
a_horse_with_no_namea_horse_with_no_name
38.7k775112
The |/ operator calculates the square root
postgres> select |/16, sqrt(16);
?column? | sqrt
----------+------
4 | 4
(1 row)
So |/125.555/pi() is equivalent to sqrt(125.555/pi())
answered 4 hours ago
a_horse_with_no_namea_horse_with_no_name
38.7k775112
answered 4 hours ago
a_horse_with_no_namea_horse_with_no_name
38.7k775112
answered 4 hours ago
a_horse_with_no_namea_horse_with_no_name
38.7k775112
answered 4 hours ago
a_horse_with_no_namea_horse_with_no_name
38.7k775112
38.7k775112
Sure enough--looked at the site where I copied the statement from and they had this: i.imgur.com/5twDykK.png I should have worked that one out. Thanks!
– Jay Cummins
4 hours ago
1
@a_horse funny that the|/operator has lower precedence than/an*.
– yper-crazyhat-cubeᵀᴹ
3 hours ago
add a comment |
Sure enough--looked at the site where I copied the statement from and they had this: i.imgur.com/5twDykK.png I should have worked that one out. Thanks!
– Jay Cummins
4 hours ago
1
@a_horse funny that the|/operator has lower precedence than/an*.
– yper-crazyhat-cubeᵀᴹ
3 hours ago
Sure enough--looked at the site where I copied the statement from and they had this: i.imgur.com/5twDykK.png I should have worked that one out. Thanks!
– Jay Cummins
4 hours ago
Sure enough--looked at the site where I copied the statement from and they had this: i.imgur.com/5twDykK.png I should have worked that one out. Thanks!
– Jay Cummins
4 hours ago
1
1
@a_horse funny that the
|/ operator has lower precedence than / an *.– yper-crazyhat-cubeᵀᴹ
3 hours ago
@a_horse funny that the
|/ operator has lower precedence than / an *.– yper-crazyhat-cubeᵀᴹ
3 hours ago
add a comment |
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