MemSql GEOGRAPHY_DISTANCE, GEOGRAPHY_CONTAINS, GEOGRAPHY_WITHIN_DISTANCE не работает и возвращает ноль - PullRequest
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MemSql GEOGRAPHY_DISTANCE, GEOGRAPHY_CONTAINS, GEOGRAPHY_WITHIN_DISTANCE не работает и возвращает ноль

0 голосов
/ 07 февраля 2019

Он не возвращает никакой цифры, Он возвращает ноль. 

SELECT round(GEOGRAPHY_DISTANCE("GEOGRAPHY_POINT(-97.741890, 30.219940)", "POLYGON ((-97.11090087890626 33.08693925905123,-96.52862548828126 33.063924198120645,-96.56158447265626 32.80343616698929,-97.06970214843751 32.778037985363675,-97.11090087890626 33.08693925905123))"),0) FROM DUAL;

SELECT GEOGRAPHY_WITHIN_DISTANCE("GEOGRAPHY_POINT(96.843820, 32.926290)","POLYGON ((-97.11090087890626 33.08693925905123,-96.52862548828126 33.063924198120645,-96.56158447265626 32.80343616698929,-97.06970214843751 32.778037985363675,-97.11090087890626 33.08693925905123))",1000) from dual;

Может кто-нибудь, пожалуйста, помогите заставить эту геопространственную функцию memsql работать

1 Ответ

0 голосов
/ 11 февраля 2019

Расширяя ответ Damien_The_Unbeliever выше, синтаксис GEOGRAPHY_POINT не должен быть внутри строки.Вы можете определить точку в строке в синтаксисе WKT POINT(long lat) или использовать синтаксис GEOGRAPHY_POINT (но не в строке).

Итак, для вашего первого запроса, который не работал: 

memsql> SELECT round(GEOGRAPHY_DISTANCE("GEOGRAPHY_POINT(-97.741890, 30.219940)", "POLYGON ((-97.11090087890626 33.08693925905123,-96.52862548828126 33.063924198120645,-96.56158447265626 32.80343616698929,-97.06970214843751 32.778037985363675,-97.11090087890626 33.08693925905123))"),0) FROM DUAL;
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| round(GEOGRAPHY_DISTANCE("GEOGRAPHY_POINT(-97.741890, 30.219940)", "POLYGON ((-97.11090087890626 33.08693925905123,-96.52862548828126 33.063924198120645,-96.56158447265626 32.80343616698929,-97.06970214843751 32.778037985363675,-97.11090087890626 33.086939 |
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
|                                                                                                                                                                                                                                                             NULL |
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set, 1 warning (0.39 sec)

memsql> show warnings;
+---------+------+----------------------------------------------------+
| Level   | Code | Message                                            |
+---------+------+----------------------------------------------------+
| Warning | 1862 | You have an error in your WKT syntax at position 0 |
+---------+------+----------------------------------------------------+
1 row in set (0.00 sec)

Вы можете правильно написать его как один из этих двух: 

memsql> SELECT round(GEOGRAPHY_DISTANCE("POINT(-97.741890 30.219940)", "POLYGON ((-97.11090087890626 33.08693925905123,-96.52862548828126 33.063924198120645,-96.56158447265626 32.80343616698929,-97.06970214843751 32.778037985363675,-97.11090087890626 33.08693925905123))"),0) FROM DUAL;
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| round(GEOGRAPHY_DISTANCE("POINT(-97.741890 30.219940)", "POLYGON ((-97.11090087890626 33.08693925905123,-96.52862548828126 33.063924198120645,-96.56158447265626 32.80343616698929,-97.06970214843751 32.778037985363675,-97.11090087890626 33.08693925905123))" |
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
|                                                                                                                                                                                                                                                           291334 |
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.31 sec)

memsql> SELECT round(GEOGRAPHY_DISTANCE(GEOGRAPHY_POINT(-97.741890, 30.219940), "POLYGON ((-97.11090087890626 33.08693925905123,-96.52862548828126 33.063924198120645,-96.56158447265626 32.80343616698929,-97.06970214843751 32.778037985363675,-97.11090087890626 33.08693925905123))"),0) FROM DUAL;
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| round(GEOGRAPHY_DISTANCE(GEOGRAPHY_POINT(-97.741890, 30.219940), "POLYGON ((-97.11090087890626 33.08693925905123,-96.52862548828126 33.063924198120645,-96.56158447265626 32.80343616698929,-97.06970214843751 32.778037985363675,-97.11090087890626 33.08693925 |
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
|                                                                                                                                                                                                                                                           291334 |
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.54 sec)
...