Merge fails with different timestamps and 'where' clause

[mastor]

Thank you for fixing the #602 so quickly!

However, using the same dataset as #602, I added the "where" clause in the query and it still returns an empty list.

select * from test_merge_1 where time > '1980-01-01' and time < '1980-01-04'

Result:

[
  {
    "name": "test_merge_1",
    "columns": [
      "time",
      "sequence_number",
      "value"
    ],
    "points": [
      [
        315532800000,
        20001,
        "a value"
      ],
      [
        315532800000,
        10001,
        "a value"
      ]
    ]
  }
]

And the merged query:

select * from test_merge_1 merge test_merge_2 where time > '1980-01-01' and time < '1980-01-04'

Returns:

[]