Slow nested function
Please let me know what information you seek to improve the question, rather than just downvoting.
I have a function that looks like this:
DELIMITER $$
DROP FUNCTION IF EXISTS f_splitadjprice;
CREATE FUNCTION f_splitadjprice (id CHAR(8), startdate DATE)
RETURNS FLOAT
BEGIN
DECLARE splitfactor FLOAT;
DECLARE splitadjprice FLOAT;
SELECT f_splitfactor(id, startdate) INTO splitfactor;
SELECT (f.p_price FROM fp_v2_fp_basic_prices as f WHERE f.fsym_id = id AND
f.p_date = startdate) * splitfactor INTO splitadjprice;
RETURN splitadjprice;
END$$
DELIMITER ;
The function for splitfactor is:
DELIMITER $$
DROP FUNCTION IF EXISTS f_splitfactor;
CREATE FUNCTION f_splitfactor (id CHAR(8), startdate DATE)
RETURNS FLOAT
BEGIN
DECLARE splitfactor FLOAT;
SELECT IFNULL(EXP(SUM(LOG(f.p_split_factor))),1) INTO splitfactor
FROM fp_v2_fp_basic_splits AS f
WHERE f.fsym_id = id AND f.p_split_date > startdate AND f.p_split_date <
NOW();
RETURN splitfactor;
END$$
DELIMiTER ;
The function f_splitadjprice runs extremely slow. About 14 seconds PR row. I have tried to run the individual pieces of the function by themselves. That is, the function call f_splitfactor and SELECT (f.p_price FROM fp_v2_fp_basic_prices as f WHERE f.fsym_id = id AND
f.p_date = startdate). When running these two by themselves outside of the function they take 0,001 seconds to run. So the whole problem is that as soon as I want to do in combination through the nested function it takes 100.000 times longer?
mysql
asked Nov 15 '18 at 9:00
ChrisChris
1039
add a comment |
Please let me know what information you seek to improve the question, rather than just downvoting.
I have a function that looks like this:
DELIMITER $$
DROP FUNCTION IF EXISTS f_splitadjprice;
CREATE FUNCTION f_splitadjprice (id CHAR(8), startdate DATE)
RETURNS FLOAT
BEGIN
DECLARE splitfactor FLOAT;
DECLARE splitadjprice FLOAT;
SELECT f_splitfactor(id, startdate) INTO splitfactor;
SELECT (f.p_price FROM fp_v2_fp_basic_prices as f WHERE f.fsym_id = id AND
f.p_date = startdate) * splitfactor INTO splitadjprice;
RETURN splitadjprice;
END$$
DELIMITER ;
The function for splitfactor is:
DELIMITER $$
DROP FUNCTION IF EXISTS f_splitfactor;
CREATE FUNCTION f_splitfactor (id CHAR(8), startdate DATE)
RETURNS FLOAT
BEGIN
DECLARE splitfactor FLOAT;
SELECT IFNULL(EXP(SUM(LOG(f.p_split_factor))),1) INTO splitfactor
FROM fp_v2_fp_basic_splits AS f
WHERE f.fsym_id = id AND f.p_split_date > startdate AND f.p_split_date <
NOW();
RETURN splitfactor;
END$$
DELIMiTER ;
The function f_splitadjprice runs extremely slow. About 14 seconds PR row. I have tried to run the individual pieces of the function by themselves. That is, the function call f_splitfactor and SELECT (f.p_price FROM fp_v2_fp_basic_prices as f WHERE f.fsym_id = id AND
f.p_date = startdate). When running these two by themselves outside of the function they take 0,001 seconds to run. So the whole problem is that as soon as I want to do in combination through the nested function it takes 100.000 times longer?
mysql
asked Nov 15 '18 at 9:00
ChrisChris
1039
Can you add the code for f_splitfactor please.
– P.Salmon
Nov 15 '18 at 9:10
@P.Salmon Sure mate :)
– Chris
Nov 15 '18 at 9:11
@P.Salmon Can you help me?
– Chris
Nov 15 '18 at 11:55
@Chris Please read meta.stackoverflow.com/questions/333952/… on how to ask SQL related questions. Also provide the result ofEXPLAIN <select statement>statements which give you a hint on how the query is being executed.
– Progman
Nov 15 '18 at 13:39
add a comment |
Please let me know what information you seek to improve the question, rather than just downvoting.
I have a function that looks like this:
DELIMITER $$
DROP FUNCTION IF EXISTS f_splitadjprice;
CREATE FUNCTION f_splitadjprice (id CHAR(8), startdate DATE)
RETURNS FLOAT
BEGIN
DECLARE splitfactor FLOAT;
DECLARE splitadjprice FLOAT;
SELECT f_splitfactor(id, startdate) INTO splitfactor;
SELECT (f.p_price FROM fp_v2_fp_basic_prices as f WHERE f.fsym_id = id AND
f.p_date = startdate) * splitfactor INTO splitadjprice;
RETURN splitadjprice;
END$$
DELIMITER ;
The function for splitfactor is:
DELIMITER $$
DROP FUNCTION IF EXISTS f_splitfactor;
CREATE FUNCTION f_splitfactor (id CHAR(8), startdate DATE)
RETURNS FLOAT
BEGIN
DECLARE splitfactor FLOAT;
SELECT IFNULL(EXP(SUM(LOG(f.p_split_factor))),1) INTO splitfactor
FROM fp_v2_fp_basic_splits AS f
WHERE f.fsym_id = id AND f.p_split_date > startdate AND f.p_split_date <
NOW();
RETURN splitfactor;
END$$
DELIMiTER ;
The function f_splitadjprice runs extremely slow. About 14 seconds PR row. I have tried to run the individual pieces of the function by themselves. That is, the function call f_splitfactor and SELECT (f.p_price FROM fp_v2_fp_basic_prices as f WHERE f.fsym_id = id AND
f.p_date = startdate). When running these two by themselves outside of the function they take 0,001 seconds to run. So the whole problem is that as soon as I want to do in combination through the nested function it takes 100.000 times longer?
mysql
asked Nov 15 '18 at 9:00
ChrisChris
1039
Please let me know what information you seek to improve the question, rather than just downvoting.
I have a function that looks like this:
DELIMITER $$
DROP FUNCTION IF EXISTS f_splitadjprice;
CREATE FUNCTION f_splitadjprice (id CHAR(8), startdate DATE)
RETURNS FLOAT
BEGIN
DECLARE splitfactor FLOAT;
DECLARE splitadjprice FLOAT;
SELECT f_splitfactor(id, startdate) INTO splitfactor;
SELECT (f.p_price FROM fp_v2_fp_basic_prices as f WHERE f.fsym_id = id AND
f.p_date = startdate) * splitfactor INTO splitadjprice;
RETURN splitadjprice;
END$$
DELIMITER ;
The function for splitfactor is:
DELIMITER $$
DROP FUNCTION IF EXISTS f_splitfactor;
CREATE FUNCTION f_splitfactor (id CHAR(8), startdate DATE)
RETURNS FLOAT
BEGIN
DECLARE splitfactor FLOAT;
SELECT IFNULL(EXP(SUM(LOG(f.p_split_factor))),1) INTO splitfactor
FROM fp_v2_fp_basic_splits AS f
WHERE f.fsym_id = id AND f.p_split_date > startdate AND f.p_split_date <
NOW();
RETURN splitfactor;
END$$
DELIMiTER ;
The function f_splitadjprice runs extremely slow. About 14 seconds PR row. I have tried to run the individual pieces of the function by themselves. That is, the function call f_splitfactor and SELECT (f.p_price FROM fp_v2_fp_basic_prices as f WHERE f.fsym_id = id AND
f.p_date = startdate). When running these two by themselves outside of the function they take 0,001 seconds to run. So the whole problem is that as soon as I want to do in combination through the nested function it takes 100.000 times longer?
mysql
mysql
asked Nov 15 '18 at 9:00
ChrisChris
1039
asked Nov 15 '18 at 9:00
ChrisChris
1039
edited Nov 15 '18 at 12:26
Chris
asked Nov 15 '18 at 9:00
ChrisChris
1039
asked Nov 15 '18 at 9:00
ChrisChris
1039
asked Nov 15 '18 at 9:00
ChrisChris
1039
1039
Can you add the code for f_splitfactor please.
– P.Salmon
Nov 15 '18 at 9:10
@P.Salmon Sure mate :)
– Chris
Nov 15 '18 at 9:11
@P.Salmon Can you help me?
– Chris
Nov 15 '18 at 11:55
@Chris Please read meta.stackoverflow.com/questions/333952/… on how to ask SQL related questions. Also provide the result ofEXPLAIN <select statement>statements which give you a hint on how the query is being executed.
– Progman
Nov 15 '18 at 13:39
add a comment |
Can you add the code for f_splitfactor please.
– P.Salmon
Nov 15 '18 at 9:10
@P.Salmon Sure mate :)
– Chris
Nov 15 '18 at 9:11
@P.Salmon Can you help me?
– Chris
Nov 15 '18 at 11:55
@Chris Please read meta.stackoverflow.com/questions/333952/… on how to ask SQL related questions. Also provide the result ofEXPLAIN <select statement>statements which give you a hint on how the query is being executed.
– Progman
Nov 15 '18 at 13:39
Can you add the code for f_splitfactor please.
– P.Salmon
Nov 15 '18 at 9:10
Can you add the code for f_splitfactor please.
– P.Salmon
Nov 15 '18 at 9:10
@P.Salmon Sure mate :)
– Chris
Nov 15 '18 at 9:11
@P.Salmon Sure mate :)
– Chris
Nov 15 '18 at 9:11
@P.Salmon Can you help me?
– Chris
Nov 15 '18 at 11:55
@P.Salmon Can you help me?
– Chris
Nov 15 '18 at 11:55
@Chris Please read meta.stackoverflow.com/questions/333952/… on how to ask SQL related questions. Also provide the result of
EXPLAIN <select statement> statements which give you a hint on how the query is being executed.– Progman
Nov 15 '18 at 13:39
@Chris Please read meta.stackoverflow.com/questions/333952/… on how to ask SQL related questions. Also provide the result of
EXPLAIN <select statement> statements which give you a hint on how the query is being executed.– Progman
Nov 15 '18 at 13:39
add a comment |
1 Answer
1
active
oldest
votes
The solution is to not call tables within functions. In general that seems to be bad practice and it is nevertheless extremely slow. One should instead try to get rid of the function and perform the function directly in the query.
answered Nov 15 '18 at 16:22
ChrisChris
1039
add a comment |
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1 Answer
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1 Answer
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active
oldest
votes
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oldest
votes
active
oldest
votes
The solution is to not call tables within functions. In general that seems to be bad practice and it is nevertheless extremely slow. One should instead try to get rid of the function and perform the function directly in the query.
answered Nov 15 '18 at 16:22
ChrisChris
1039
add a comment |
The solution is to not call tables within functions. In general that seems to be bad practice and it is nevertheless extremely slow. One should instead try to get rid of the function and perform the function directly in the query.
answered Nov 15 '18 at 16:22
ChrisChris
1039
add a comment |
The solution is to not call tables within functions. In general that seems to be bad practice and it is nevertheless extremely slow. One should instead try to get rid of the function and perform the function directly in the query.
answered Nov 15 '18 at 16:22
ChrisChris
1039
The solution is to not call tables within functions. In general that seems to be bad practice and it is nevertheless extremely slow. One should instead try to get rid of the function and perform the function directly in the query.
answered Nov 15 '18 at 16:22
ChrisChris
1039
answered Nov 15 '18 at 16:22
ChrisChris
1039
answered Nov 15 '18 at 16:22
ChrisChris
1039
answered Nov 15 '18 at 16:22
ChrisChris
1039
1039
add a comment |
add a comment |
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Can you add the code for f_splitfactor please.
– P.Salmon
Nov 15 '18 at 9:10
@P.Salmon Sure mate :)
– Chris
Nov 15 '18 at 9:11
@P.Salmon Can you help me?
– Chris
Nov 15 '18 at 11:55
@Chris Please read meta.stackoverflow.com/questions/333952/… on how to ask SQL related questions. Also provide the result of
EXPLAIN <select statement>statements which give you a hint on how the query is being executed.– Progman
Nov 15 '18 at 13:39