|
| 1 | +config { hasOutput: true } |
| 2 | +/* |
| 3 | + * Copyright 2024 Google LLC |
| 4 | + * |
| 5 | + * Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | + * you may not use this file except in compliance with the License. |
| 7 | + * You may obtain a copy of the License at |
| 8 | + * |
| 9 | + * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | + * |
| 11 | + * Unless required by applicable law or agreed to in writing, software |
| 12 | + * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | + * See the License for the specific language governing permissions and |
| 15 | + * limitations under the License. |
| 16 | + */ |
| 17 | + |
| 18 | +CREATE OR REPLACE FUNCTION ${self()}(d DATETIME, format STRING) |
| 19 | + RETURNS DATETIME |
| 20 | + OPTIONS ( |
| 21 | + description="Emulates the behavior of Oracle's ROUND function for dates" |
| 22 | + ) |
| 23 | + AS ( |
| 24 | + CASE |
| 25 | + WHEN format = "YEAR" OR format = "SYYYY" OR format = "YYYY" OR format = "SYEAR" OR format = "YYY" OR format = "YY" OR format = "Y" THEN |
| 26 | + DATETIME_TRUNC(DATETIME_ADD(d, INTERVAL 6 MONTH), YEAR) |
| 27 | + WHEN format = "IYYY" OR format = "IYY" OR format = "IY" OR format = "I" THEN |
| 28 | + DATETIME_TRUNC(DATETIME_ADD(d, INTERVAL 6 MONTH), YEAR) |
| 29 | + WHEN format = "Q" THEN |
| 30 | + DATETIME_TRUNC(DATETIME_ADD(d, INTERVAL 3 MONTH), QUARTER) |
| 31 | + WHEN format = "MON" OR format = "MM" OR format = "RM" OR format = "MONTH" THEN |
| 32 | + IF(EXTRACT(DAY FROM d) >= 16, DATETIME_ADD(DATETIME_TRUNC(d, MONTH), INTERVAL 1 MONTH), DATETIME_TRUNC(d, MONTH)) |
| 33 | + WHEN format = "WW" THEN |
| 34 | + ( |
| 35 | + WITH t AS ( |
| 36 | + SELECT |
| 37 | + DATE_DIFF(d, DATE_TRUNC(d, YEAR), HOUR) AS h, |
| 38 | + CAST(24 * 7 AS int64) AS hw |
| 39 | + ) |
| 40 | + SELECT |
| 41 | + DATETIME_TRUNC(DATETIME_ADD(DATE_TRUNC(d, YEAR), INTERVAL CAST((DIV(h, hw) + IF (MOD(h, hw) < hw / 2, 0, 1)) * hw AS int64) hour), DAY) |
| 42 | + FROM t |
| 43 | + ) |
| 44 | + WHEN format = "IW" THEN |
| 45 | + ( |
| 46 | + WITH t AS ( |
| 47 | + SELECT |
| 48 | + DATE_DIFF(d, DATE_TRUNC(d, ISOYEAR), HOUR) AS h, |
| 49 | + CAST(24 * 7 AS int64) AS hw |
| 50 | + ) |
| 51 | + SELECT |
| 52 | + DATETIME_TRUNC(DATETIME_ADD(DATE_TRUNC(d, ISOYEAR), INTERVAL CAST((DIV(h, hw) + IF(MOD(h, hw) < hw / 2, 0, 1)) * hw AS int64) hour), DAY) |
| 53 | + FROM t |
| 54 | + ) |
| 55 | + WHEN format = "W" THEN |
| 56 | + ( |
| 57 | + WITH t AS ( |
| 58 | + SELECT |
| 59 | + DATE_DIFF(d, DATE_TRUNC(d, MONTH), HOUR) AS h, |
| 60 | + CAST(24 * 7 AS int64) AS hw |
| 61 | + ) |
| 62 | + SELECT |
| 63 | + DATETIME_TRUNC(DATETIME_ADD(DATE_TRUNC(d, MONTH), INTERVAL CAST((DIV(h, hw) + IF (MOD(h, hw) < hw / 2, 0, 1)) * hw AS int64) hour), DAY) |
| 64 | + FROM t |
| 65 | + ) |
| 66 | + WHEN format = "DDD" OR format = "DD" OR format = "J" THEN |
| 67 | + DATETIME_TRUNC(DATETIME_ADD(d, INTERVAL 12 HOUR), DAY) |
| 68 | + WHEN format = "DY" OR format = "D" OR format = "DAY" THEN |
| 69 | + DATETIME_TRUNC(DATETIME_ADD(d, INTERVAL 84 HOUR), WEEK) |
| 70 | + WHEN format = "HH24" OR format = "HH12" OR format = "HH" THEN |
| 71 | + DATETIME_TRUNC(DATETIME_ADD(d, INTERVAL 30 MINUTE), HOUR) |
| 72 | + WHEN format = "MI" THEN |
| 73 | + DATETIME_TRUNC(DATETIME_ADD(d, INTERVAL 30 SECOND), MINUTE) |
| 74 | + ELSE NULL |
| 75 | + END |
| 76 | + ); |
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