map SQL dates and times to DateTime

[fsw]

I have tested this just for my simple use case.
@zim32 I can add some more tests for column types in this PR if general approach in this change is OK.
This change is not backward compatible (typedAssoc will return different types)
fixes #12

[zim32]

Hi fsw. ThI think because this library is still not in stable semver we can just bump minor version and write changelog.

I will check your PR in a few days

[fsw]

Yes, I guess minor bump would be OK.

I am not sure what to do with sql TIME type, but I guess this one should be passed as String and not converted to DateTime. I will fix this and add some tests.

[zim32]

Yes, TIME should be just String

[fsw]

added some changes:

• map TIME to string
• map YEAR to int by default (It should fit into integer size)
• removed test.dart (guess it is unused)
• refactored tests so socket and TCP connection can be tested using same code base.
• added test for default types mapping behavior.

Few things I noticed while adding types mapping test:

• query that returns spatial type is throwing: "FormatException: Unexpected extension byte" I guess this is not yet implemented. I left it commented out and marked with TODO in test code.
• Types that would not fit into INT (Like BIT, DECIMAL etc) are mapped to String. I guess this is OK if it will be reliable but this creates weird behaviors (like MAX(col) returns int but SUM(col) returns String). Maybe we can consider mapping those types to BigInt?

[zim32]

I think if we convert year to INT now, users will expect that numbers will be converted to numbers or at least to BigInt. So yeah it is logical to convert them to BigInt.

[zim32]

I am merging this PR, but we need to implement BigInt mapping to be consistent.

[zim32]

You changed something in the tests, so now they are not working.

dart test test/mysql_client.dart

00:00 +0 -1: loading test/mysql_client.dart [E]                                                                                                                           
  Failed to load "test/mysql_client.dart":
  /tmp/dart_test.TYGLEF/test.dart:9:42: Error: Undefined name 'main'.
        internalBootstrapVmTest(() => test.main, sendPort);
                                           ^^^^
00:00 +0 -1: Some tests failed.  

[zim32]

Ah I see. You refactor and move it to separate files for TCP and Unix socket tests. Ok

[fsw]

@zim32 yes,

Maybe the file "test/mysql_client.dart" should be moved to "test/lib/mysql_client.dart" or something like this to make it more clear.

And yes the BigInt change can be separate PR.

thanks.