diff options
| -rw-r--r-- | contrib/pg_stat_statements/pg_stat_statements.c | 21 |
1 files changed, 2 insertions, 19 deletions
diff --git a/contrib/pg_stat_statements/pg_stat_statements.c b/contrib/pg_stat_statements/pg_stat_statements.c index fee2aaacbe2..da6c242631a 100644 --- a/contrib/pg_stat_statements/pg_stat_statements.c +++ b/contrib/pg_stat_statements/pg_stat_statements.c @@ -57,6 +57,7 @@ */ #include "postgres.h" +#include <math.h> #include <sys/stat.h> #include <unistd.h> @@ -326,7 +327,6 @@ static char *generate_normalized_query(pgssJumbleState *jstate, const char *quer int *query_len_p, int encoding); static void fill_in_constant_lengths(pgssJumbleState *jstate, const char *query); static int comp_location(const void *a, const void *b); -static inline double sqrtd(const double x); /* @@ -1583,7 +1583,7 @@ pg_stat_statements_internal(FunctionCallInfo fcinfo, */ if (tmp.calls > 1) values[i++] = - Float8GetDatum(sqrtd(tmp.sum_var_time / tmp.calls)); + Float8GetDatum(sqrt(tmp.sum_var_time / tmp.calls)); else values[i++] = Float8GetDatum(0.0); } @@ -2968,20 +2968,3 @@ comp_location(const void *a, const void *b) else return 0; } - -/* - * fast sqrt algorithm: reference from Fast inverse square root algorithms. - */ -static inline double -sqrtd(const double x) -{ - double x_half = 0.5 * x; - long long int tmp = 0x5FE6EB50C7B537AAl - ( *(long long int*)&x >> 1); - double x_result = * (double*)&tmp; - - x_result *= (1.5 - (x_half * x_result * x_result)); - /* If retry this calculation, it becomes higher precision at sqrt */ - x_result *= (1.5 - (x_half * x_result * x_result)); - - return x_result * x; -} |