AWS Timestream "Not equal" 比较引发错误

Question

我有一个查询，我想在其中获取“已完成”字段不等于 0 的所有数据，但它会引发错误。我不明白为什么他们 documentation 支持这些比较。

$result = $query_client->query([
    'MaxRows' => 1,
    'QueryString' => 'SELECT field1, field2, completed, date 
FROM "db"."table"
WHERE completed != 0  // Tried as "0" as well, doesnt work
ORDER BY date DESC',
]);

错误：

com.amazonaws.timestream.v20181101.query#ValidationException, '<>' cannot be applied to varchar, integer"

Answer 1

修复如下：

   $result = $query_client->query([
     'MaxRows' => 1,
     'QueryString' => 'SELECT field1, field2, completed, date 
      FROM \"db\".\"table\"
      WHERE completed =  '" . 0 . "'
      ORDER BY date DESC',
   ]);