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Fixed #33553 -- Used built-in math functions in SQLite 3.35+. 

In SQLite 3.35+ some math functions are available built-in as long as
they are not disabled at compile time. We can introspect this and use
these built-in functions in preference to our slower implementations.
This commit is contained in:
Nick Pope 2022-01-28 19:01:55 +00:00 committed by Mariusz Felisiak
parent 9652a118ce
commit d436554861
1 changed files with 21 additions and 18 deletions
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39
django/db/backends/sqlite3/_functions.py
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@ -60,25 +60,10 @@ def register(connection):
create_deterministic_function("django_timestamp_diff", 2, _sqlite_timestamp_diff)
create_deterministic_function("django_format_dtdelta", 3, _sqlite_format_dtdelta)
create_deterministic_function("regexp", 2, _sqlite_regexp)
create_deterministic_function("ACOS", 1, _sqlite_acos)
create_deterministic_function("ASIN", 1, _sqlite_asin)
create_deterministic_function("ATAN", 1, _sqlite_atan)
create_deterministic_function("ATAN2", 2, _sqlite_atan2)
create_deterministic_function("BITXOR", 2, _sqlite_bitxor)
create_deterministic_function("CEILING", 1, _sqlite_ceiling)
create_deterministic_function("COS", 1, _sqlite_cos)
create_deterministic_function("COT", 1, _sqlite_cot)
create_deterministic_function("DEGREES", 1, _sqlite_degrees)
create_deterministic_function("EXP", 1, _sqlite_exp)
create_deterministic_function("FLOOR", 1, _sqlite_floor)
create_deterministic_function("LN", 1, _sqlite_ln)
create_deterministic_function("LOG", 2, _sqlite_log)
create_deterministic_function("LPAD", 3, _sqlite_lpad)
create_deterministic_function("MD5", 1, _sqlite_md5)
create_deterministic_function("MOD", 2, _sqlite_mod)
create_deterministic_function("PI", 0, _sqlite_pi)
create_deterministic_function("POWER", 2, _sqlite_power)
create_deterministic_function("RADIANS", 1, _sqlite_radians)
create_deterministic_function("REPEAT", 2, _sqlite_repeat)
create_deterministic_function("REVERSE", 1, _sqlite_reverse)
create_deterministic_function("RPAD", 3, _sqlite_rpad)
@ -88,9 +73,6 @@ def register(connection):
create_deterministic_function("SHA384", 1, _sqlite_sha384)
create_deterministic_function("SHA512", 1, _sqlite_sha512)
create_deterministic_function("SIGN", 1, _sqlite_sign)
create_deterministic_function("SIN", 1, _sqlite_sin)
create_deterministic_function("SQRT", 1, _sqlite_sqrt)
create_deterministic_function("TAN", 1, _sqlite_tan)
# Don't use the built-in RANDOM() function because it returns a value
# in the range [-1 * 2^63, 2^63 - 1] instead of [0, 1).
connection.create_function("RAND", 0, random.random)
@ -98,6 +80,27 @@ def register(connection):
connection.create_aggregate("STDDEV_SAMP", 1, StdDevSamp)
connection.create_aggregate("VAR_POP", 1, VarPop)
connection.create_aggregate("VAR_SAMP", 1, VarSamp)
# Some math functions are enabled by default in SQLite 3.35+.
sql = "select sqlite_compileoption_used('ENABLE_MATH_FUNCTIONS')"
if not connection.execute(sql).fetchone()[0]:
create_deterministic_function("ACOS", 1, _sqlite_acos)
create_deterministic_function("ASIN", 1, _sqlite_asin)
create_deterministic_function("ATAN", 1, _sqlite_atan)
create_deterministic_function("ATAN2", 2, _sqlite_atan2)
create_deterministic_function("CEILING", 1, _sqlite_ceiling)
create_deterministic_function("COS", 1, _sqlite_cos)
create_deterministic_function("DEGREES", 1, _sqlite_degrees)
create_deterministic_function("EXP", 1, _sqlite_exp)
create_deterministic_function("FLOOR", 1, _sqlite_floor)
create_deterministic_function("LN", 1, _sqlite_ln)
create_deterministic_function("LOG", 2, _sqlite_log)
create_deterministic_function("MOD", 2, _sqlite_mod)
create_deterministic_function("PI", 0, _sqlite_pi)
create_deterministic_function("POWER", 2, _sqlite_power)
create_deterministic_function("RADIANS", 1, _sqlite_radians)
create_deterministic_function("SIN", 1, _sqlite_sin)
create_deterministic_function("SQRT", 1, _sqlite_sqrt)
create_deterministic_function("TAN", 1, _sqlite_tan)
def _sqlite_datetime_parse(dt, tzname=None, conn_tzname=None):