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Allow to_timestamp(float8) to convert float infinity to timestamp infinity.

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With the original SQL-function implementation, such cases failed because
we don't support infinite intervals.  Converting the function to C lets
us bypass the interval representation, which should be a bit faster as
well as more flexible.

Vitaly Burovoy, reviewed by Anastasia Lubennikova
This commit is contained in:
Tom Lane
2016-03-29 17:09:21 -04:00
parent 96f8373cad
commit e511d878f3
7 changed files with 149 additions and 26 deletions
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src/include/utils/timestamp.h
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@@ -124,6 +124,7 @@ extern Datum timestamp_cmp_timestamptz(PG_FUNCTION_ARGS);
extern Datum make_timestamp(PG_FUNCTION_ARGS);
extern Datum make_timestamptz(PG_FUNCTION_ARGS);
extern Datum make_timestamptz_at_timezone(PG_FUNCTION_ARGS);
extern Datum float8_timestamptz(PG_FUNCTION_ARGS);
extern Datum timestamptz_eq_timestamp(PG_FUNCTION_ARGS);
extern Datum timestamptz_ne_timestamp(PG_FUNCTION_ARGS);