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 --
 -- Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
 --
 --
 -- INTERVAL
 -- https://github.com/postgres/postgres/blob/REL_12_STABLE/src/test/regress/sql/interval.sql
 
 -- [SPARK-28259] Date/Time Output Styles and Date Order Conventions
 -- SET DATESTYLE = 'ISO';
 -- [SPARK-29406] Interval output styles
 -- SET IntervalStyle to postgres;
 
 -- check acceptance of "time zone style"
 -- [SPARK-29369] Accept strings without `interval` prefix in casting to intervals
 -- [SPARK-29370] Interval strings without explicit unit markings
 -- SELECT INTERVAL '01:00' AS `One hour`;
 -- SELECT INTERVAL '+02:00' AS `Two hours`;
 -- SELECT INTERVAL '-08:00' AS `Eight hours`;
 -- SELECT INTERVAL '-1 +02:03' AS `22 hours ago...`;
 -- SELECT INTERVAL '-1 days +02:03' AS `22 hours ago...`;
 -- [SPARK-29371] Support interval field values with fractional parts
 -- SELECT INTERVAL '1.5 weeks' AS `Ten days twelve hours`;
 -- SELECT INTERVAL '1.5 months' AS `One month 15 days`;
 -- SELECT INTERVAL '10 years -11 month -12 days +13:14' AS `9 years...`;
 
 -- [SPARK-29382] Support writing `INTERVAL` type to datasource table
 -- CREATE TABLE INTERVAL_TBL (f1 interval);
 
 -- [SPARK-29383] Support the optional prefix `@` in interval strings
 -- INSERT INTO INTERVAL_TBL (f1) VALUES ('@ 1 minute');
 -- INSERT INTO INTERVAL_TBL (f1) VALUES ('@ 5 hour');
 -- INSERT INTO INTERVAL_TBL (f1) VALUES ('@ 10 day');
 -- INSERT INTO INTERVAL_TBL (f1) VALUES ('@ 34 year');
 -- INSERT INTO INTERVAL_TBL (f1) VALUES ('@ 3 months');
 -- [SPARK-29384] Support `ago` in interval strings
 -- INSERT INTO INTERVAL_TBL (f1) VALUES ('@ 14 seconds ago');
 -- INSERT INTO INTERVAL_TBL (f1) VALUES ('1 day 2 hours 3 minutes 4 seconds');
 -- INSERT INTO INTERVAL_TBL (f1) VALUES ('6 years');
 -- INSERT INTO INTERVAL_TBL (f1) VALUES ('5 months');
 -- INSERT INTO INTERVAL_TBL (f1) VALUES ('5 months 12 hours');
 
 -- badly formatted interval
 -- INSERT INTO INTERVAL_TBL (f1) VALUES ('badly formatted interval');
 -- INSERT INTO INTERVAL_TBL (f1) VALUES ('@ 30 eons ago');
 
 -- test interval operators
 
 -- SELECT '' AS ten, * FROM INTERVAL_TBL;
 -- [SPARK-29385] Make `INTERVAL` values comparable
 -- SELECT '' AS nine, * FROM INTERVAL_TBL
 --   WHERE INTERVAL_TBL.f1 <> interval '@ 10 days';
 
 -- SELECT '' AS three, * FROM INTERVAL_TBL
 --   WHERE INTERVAL_TBL.f1 <= interval '@ 5 hours';
 
 -- SELECT '' AS three, * FROM INTERVAL_TBL
 --   WHERE INTERVAL_TBL.f1 < interval '@ 1 day';
 
 -- SELECT '' AS one, * FROM INTERVAL_TBL
 --   WHERE INTERVAL_TBL.f1 = interval '@ 34 years';
 
 -- SELECT '' AS five, * FROM INTERVAL_TBL
 --   WHERE INTERVAL_TBL.f1 >= interval '@ 1 month';
 
 -- SELECT '' AS nine, * FROM INTERVAL_TBL
 --   WHERE INTERVAL_TBL.f1 > interval '@ 3 seconds ago';
 
 -- SELECT '' AS fortyfive, r1.*, r2.*
 --   FROM INTERVAL_TBL r1, INTERVAL_TBL r2
 --   WHERE r1.f1 > r2.f1
 --   ORDER BY r1.f1, r2.f1;
 
 -- Test intervals that are large enough to overflow 64 bits in comparisons
 -- [SPARK-29369] Accept strings without `interval` prefix in casting to intervals
 -- CREATE TEMP TABLE INTERVAL_TBL_OF (f1 interval);
 -- INSERT INTO INTERVAL_TBL_OF (f1) VALUES
 --  ('2147483647 days 2147483647 months'),
 --  ('2147483647 days -2147483648 months'),
 --  ('1 year'),
 --  ('-2147483648 days 2147483647 months'),
 --  ('-2147483648 days -2147483648 months');
 -- these should fail as out-of-range
 -- INSERT INTO INTERVAL_TBL_OF (f1) VALUES ('2147483648 days');
 -- INSERT INTO INTERVAL_TBL_OF (f1) VALUES ('-2147483649 days');
 -- INSERT INTO INTERVAL_TBL_OF (f1) VALUES ('2147483647 years');
 -- INSERT INTO INTERVAL_TBL_OF (f1) VALUES ('-2147483648 years');
 
 -- SELECT r1.*, r2.*
 --   FROM INTERVAL_TBL_OF r1, INTERVAL_TBL_OF r2
 --   WHERE r1.f1 > r2.f1
 --   ORDER BY r1.f1, r2.f1;
 
 -- CREATE INDEX ON INTERVAL_TBL_OF USING btree (f1);
 -- SET enable_seqscan TO false;
 -- EXPLAIN (COSTS OFF)
 -- SELECT f1 FROM INTERVAL_TBL_OF r1 ORDER BY f1;
 -- SELECT f1 FROM INTERVAL_TBL_OF r1 ORDER BY f1;
 -- RESET enable_seqscan;
 
 -- DROP TABLE INTERVAL_TBL_OF;
 
 -- Test multiplication and division with intervals.
 -- Floating point arithmetic rounding errors can lead to unexpected results,
 -- though the code attempts to do the right thing and round up to days and
 -- minutes to avoid results such as '3 days 24:00 hours' or '14:20:60'.
 -- Note that it is expected for some day components to be greater than 29 and
 -- some time components be greater than 23:59:59 due to how intervals are
 -- stored internally.
 -- [SPARK-29386] Copy data between a file and a table
 -- CREATE TABLE INTERVAL_MULDIV_TBL (span interval);
 -- COPY INTERVAL_MULDIV_TBL FROM STDIN;
 -- 41 mon 12 days 360:00
 -- -41 mon -12 days +360:00
 -- -12 days
 -- 9 mon -27 days 12:34:56
 -- -3 years 482 days 76:54:32.189
 -- 4 mon
 -- 14 mon
 -- 999 mon 999 days
 -- \.
 -- [SPARK-29387] Support `*` and `\` operators for intervals
 -- SELECT span * 0.3 AS product
 -- FROM INTERVAL_MULDIV_TBL;
 
 -- SELECT span * 8.2 AS product
 -- FROM INTERVAL_MULDIV_TBL;
 
 -- SELECT span / 10 AS quotient
 -- FROM INTERVAL_MULDIV_TBL;
 
 -- SELECT span / 100 AS quotient
 -- FROM INTERVAL_MULDIV_TBL;
 
 -- DROP TABLE INTERVAL_MULDIV_TBL;
 -- [SPARK-28259] Date/Time Output Styles and Date Order Conventions
 -- SET DATESTYLE = 'postgres';
 -- [SPARK-29406] Interval output styles
 -- SET IntervalStyle to postgres_verbose;
 
 -- SELECT '' AS ten, * FROM INTERVAL_TBL;
 
 -- test avg(interval), which is somewhat fragile since people have been
 -- known to change the allowed input syntax for type interval without
 -- updating pg_aggregate.agginitval
 
 -- select avg(f1) from interval_tbl;
 
 -- test long interval input
 -- [SPARK-29388] Construct intervals from the `millenniums`, `centuries` or `decades` units
 -- select '4 millenniums 5 centuries 4 decades 1 year 4 months 4 days 17 minutes 31 seconds'::interval;
 
 -- test long interval output
 -- Note: the actual maximum length of the interval output is longer,
 -- but we need the test to work for both integer and floating-point
 -- timestamps.
 -- [SPARK-29389] Support synonyms for interval units
 -- select '100000000y 10mon -1000000000d -100000h -10min -10.000001s ago'::interval;
 
 -- test justify_hours() and justify_days()
 -- [SPARK-29390] Add the justify_days(), justify_hours() and justify_interval() functions
 -- SELECT justify_hours(interval '6 months 3 days 52 hours 3 minutes 2 seconds') as `6 mons 5 days 4 hours 3 mins 2 seconds`;
 -- SELECT justify_days(interval '6 months 36 days 5 hours 4 minutes 3 seconds') as `7 mons 6 days 5 hours 4 mins 3 seconds`;
 
 -- test justify_interval()
 
 -- SELECT justify_interval(interval '1 month -1 hour') as `1 month -1 hour`;
 
 -- test fractional second input, and detection of duplicate units
 -- [SPARK-28259] Date/Time Output Styles and Date Order Conventions
 -- SET DATESTYLE = 'ISO';
 -- [SPARK-29406] Interval output styles
 -- SET IntervalStyle TO postgres;
 -- [SPARK-29369] Accept strings without `interval` prefix in casting to intervals
 -- SELECT '1 millisecond'::interval, '1 microsecond'::interval,
 --       '500 seconds 99 milliseconds 51 microseconds'::interval;
 -- SELECT '3 days 5 milliseconds'::interval;
 
 -- SELECT '1 second 2 seconds'::interval;              -- error
 -- SELECT '10 milliseconds 20 milliseconds'::interval; -- error
 -- SELECT '5.5 seconds 3 milliseconds'::interval;      -- error
 -- SELECT '1:20:05 5 microseconds'::interval;          -- error
 -- SELECT '1 day 1 day'::interval;                     -- error
 -- [SPARK-29391] Default year-month units
 -- SELECT interval '1-2';  -- SQL year-month literal
 SELECT interval '999' second;  -- oversize leading field is ok
 SELECT interval '999' minute;
 SELECT interval '999' hour;
 SELECT interval '999' day;
 SELECT interval '999' month;
 
 -- test SQL-spec syntaxes for restricted field sets
 SELECT interval '1' year;
 SELECT interval '2' month;
 SELECT interval '3' day;
 SELECT interval '4' hour;
 SELECT interval '5' minute;
 SELECT interval '6' second;
 -- [SPARK-29391] Default year-month units
 -- SELECT interval '1' year to month;
 SELECT interval '1-2' year to month;
 -- [SPARK-29391] Default year-month units
 -- SELECT interval '1 2' day to hour;
 SELECT interval '1 2:03' day to hour;
 SELECT interval '1 2:03:04' day to hour;
 -- SELECT interval '1 2' day to minute;
 SELECT interval '1 2:03' day to minute;
 SELECT interval '1 2:03:04' day to minute;
 -- SELECT interval '1 2' day to second;
 SELECT interval '1 2:03' day to second;
 SELECT interval '1 2:03:04' day to second;
 -- SELECT interval '1 2' hour to minute;
 SELECT interval '1 2:03' hour to minute;
 SELECT interval '1 2:03:04' hour to minute;
 -- SELECT interval '1 2' hour to second;
 SELECT interval '1 2:03' hour to second;
 SELECT interval '1 2:03:04' hour to second;
 -- SELECT interval '1 2' minute to second;
 SELECT interval '1 2:03' minute to second;
 SELECT interval '1 2:03:04' minute to second;
 -- [SPARK-29370] Interval strings without explicit unit markings
 -- SELECT interval '1 +2:03' minute to second;
 -- SELECT interval '1 +2:03:04' minute to second;
 -- SELECT interval '1 -2:03' minute to second;
 -- SELECT interval '1 -2:03:04' minute to second;
 -- SELECT interval '123 11' day to hour; -- ok
 -- SELECT interval '123 11' day; -- not ok
 -- SELECT interval '123 11'; -- not ok, too ambiguous
 -- SELECT interval '123 2:03 -2:04'; -- not ok, redundant hh:mm fields
 
 -- test syntaxes for restricted precision
 -- [SPARK-29395] Precision of the interval type
 -- SELECT interval(0) '1 day 01:23:45.6789';
 -- SELECT interval(2) '1 day 01:23:45.6789';
 -- SELECT interval '12:34.5678' minute to second(2);  -- per SQL spec
 -- SELECT interval '1.234' second;
 -- SELECT interval '1.234' second(2);
 -- SELECT interval '1 2.345' day to second(2);
 -- SELECT interval '1 2:03' day to second(2);
 -- SELECT interval '1 2:03.4567' day to second(2);
 -- SELECT interval '1 2:03:04.5678' day to second(2);
 -- SELECT interval '1 2.345' hour to second(2);
 -- SELECT interval '1 2:03.45678' hour to second(2);
 -- SELECT interval '1 2:03:04.5678' hour to second(2);
 -- SELECT interval '1 2.3456' minute to second(2);
 -- SELECT interval '1 2:03.5678' minute to second(2);
 -- SELECT interval '1 2:03:04.5678' minute to second(2);
 
 -- test casting to restricted precision (bug #14479)
 -- SELECT f1, f1::INTERVAL DAY TO MINUTE AS `minutes`,
 --  (f1 + INTERVAL '1 month')::INTERVAL MONTH::INTERVAL YEAR AS `years`
 --  FROM interval_tbl;
 
 -- test inputting and outputting SQL standard interval literals
 -- [SPARK-29406] Interval output styles
 -- SET IntervalStyle TO sql_standard;
 -- [SPARK-29407] Support syntax for zero interval
 -- SELECT  interval '0'                       AS zero,
 --        interval '1-2' year to month       AS `year-month`,
 --        interval '1 2:03:04' day to second AS `day-time`,
 -- [SPARK-29408] Support interval literal with negative sign `-`
 --        - interval '1-2'                   AS `negative year-month`,
 --        - interval '1 2:03:04'             AS `negative day-time`;
 
 -- test input of some not-quite-standard interval values in the sql style
 -- [SPARK-29406] Interval output styles
 -- SET IntervalStyle TO postgres;
 -- SELECT  interval '+1 -1:00:00',
 --         interval '-1 +1:00:00',
 --         interval '+1-2 -3 +4:05:06.789',
 --         interval '-1-2 +3 -4:05:06.789';
 
 -- test output of couple non-standard interval values in the sql style
 -- [SPARK-29406] Interval output styles
 -- SET IntervalStyle TO sql_standard;
 -- SELECT  interval '1 day -1 hours',
 --         interval '-1 days +1 hours',
 --         interval '1 years 2 months -3 days 4 hours 5 minutes 6.789 seconds',
 --         - interval '1 years 2 months -3 days 4 hours 5 minutes 6.789 seconds';
 
 -- test outputting iso8601 intervals
 -- [SPARK-29406] Interval output styles
 -- SET IntervalStyle to iso_8601;
 -- select  interval '0'                                AS zero,
 --         interval '1-2'                              AS `a year 2 months`,
 --         interval '1 2:03:04'                        AS `a bit over a day`,
 --         interval '2:03:04.45679'                    AS `a bit over 2 hours`,
 --         (interval '1-2' + interval '3 4:05:06.7')   AS `all fields`,
 --         (interval '1-2' - interval '3 4:05:06.7')   AS `mixed sign`,
 --         (- interval '1-2' + interval '3 4:05:06.7') AS negative;
 
 -- test inputting ISO 8601 4.4.2.1 "Format With Time Unit Designators"
 -- [SPARK-29406] Interval output styles
 -- SET IntervalStyle to sql_standard;
 -- [SPARK-29394] Support ISO 8601 format for intervals
 -- select  interval 'P0Y'                    AS zero,
 --         interval 'P1Y2M'                  AS `a year 2 months`,
 --         interval 'P1W'                    AS `a week`,
 --         interval 'P1DT2H3M4S'             AS `a bit over a day`,
 --         interval 'P1Y2M3DT4H5M6.7S'       AS `all fields`,
 --         interval 'P-1Y-2M-3DT-4H-5M-6.7S' AS negative,
 --         interval 'PT-0.1S'                AS `fractional second`;
 
 -- test inputting ISO 8601 4.4.2.2 "Alternative Format"
 -- [SPARK-29406] Interval output styles
 -- SET IntervalStyle to postgres;
 -- select  interval 'P00021015T103020'       AS `ISO8601 Basic Format`,
 --         interval 'P0002-10-15T10:30:20'   AS `ISO8601 Extended Format`;
 
 -- Make sure optional ISO8601 alternative format fields are optional.
 -- select  interval 'P0002'                  AS `year only`,
 --         interval 'P0002-10'               AS `year month`,
 --         interval 'P0002-10-15'            AS `year month day`,
 --         interval 'P0002T1S'               AS `year only plus time`,
 --         interval 'P0002-10T1S'            AS `year month plus time`,
 --         interval 'P0002-10-15T1S'         AS `year month day plus time`,
 --         interval 'PT10'                   AS `hour only`,
 --         interval 'PT10:30'                AS `hour minute`;
 
 -- test a couple rounding cases that changed since 8.3 w/ HAVE_INT64_TIMESTAMP.
 -- [SPARK-29406] Interval output styles
 -- SET IntervalStyle to postgres_verbose;
 -- select interval '-10 mons -3 days +03:55:06.70';
 -- select interval '1 year 2 mons 3 days 04:05:06.699999';
 -- select interval '0:0:0.7', interval '@ 0.70 secs', interval '0.7 seconds';
 
 -- check that '30 days' equals '1 month' according to the hash function
 -- [SPARK-29385] Make `INTERVAL` values comparable
 -- select '30 days'::interval = '1 month'::interval as t;
 -- select interval_hash('30 days'::interval) = interval_hash('1 month'::interval) as t;
 
 -- numeric constructor
 -- [SPARK-29393] Add the make_interval() function
 -- select make_interval(years := 2);
 -- select make_interval(years := 1, months := 6);
 -- select make_interval(years := 1, months := -1, weeks := 5, days := -7, hours := 25, mins := -180);
 
 -- select make_interval() = make_interval(years := 0, months := 0, weeks := 0, days := 0, mins := 0, secs := 0.0);
 -- select make_interval(hours := -2, mins := -10, secs := -25.3);
 
 -- select make_interval(years := 'inf'::float::int);
 -- select make_interval(months := 'NaN'::float::int);
 -- select make_interval(secs := 'inf');
 -- select make_interval(secs := 'NaN');
 -- select make_interval(secs := 7e12);

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