[Draft for testing, not for review.] Implementing Spanner UUID type in data migrations

[VardhanThigle]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 93.25843% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 55.51%. Comparing base (f66b280) to head (a16d47d).
⚠️ Report is 49 commits behind head on main.

Files with missing lines	Patch %	Lines
...ogle/cloud/teleport/v2/writer/DeadLetterQueue.java	71.42%	0 Missing and 2 partials ⚠️
...rt/v2/templates/dbutils/dml/MySQLDMLGenerator.java	50.00%	0 Missing and 2 partials ⚠️
.../templates/dbutils/dml/PostgreSQLDMLGenerator.java	50.00%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #3847      +/-   ##
============================================
+ Coverage     54.96%   55.51%   +0.55%     
+ Complexity     6925     6516     -409     
============================================
  Files          1096     1102       +6     
  Lines         67353    67525     +172     
  Branches       7558     7580      +22     
============================================
+ Hits          37021    37488     +467     
+ Misses        27857    27594     -263     
+ Partials       2475     2443      -32     

Components	Coverage Δ
spanner-templates	76.12% <93.25%> (+1.31%)	⬆️
spanner-import-export	68.65% <ø> (+0.12%)	⬆️
spanner-live-forward-migration	90.35% <100.00%> (+2.96%)	⬆️
spanner-live-reverse-replication	83.02% <95.12%> (+4.22%)	⬆️
spanner-bulk-migration	92.67% <97.53%> (+1.70%)	⬆️
gcs-spanner-dv	89.24% <100.00%> (+3.49%)	⬆️

Files with missing lines	Coverage Δ
...m/google/cloud/teleport/v2/spanner/ddl/Column.java	91.52% <100.00%> (+31.76%)	⬆️
.../v2/spanner/migrations/avro/AvroToValueMapper.java	95.34% <100.00%> (+1.17%)	⬆️
...er/migrations/avro/GenericRecordTypeConvertor.java	96.35% <100.00%> (+0.08%)	⬆️
...ations/convertors/ChangeEventSpannerConvertor.java	85.93% <100.00%> (+0.69%)	⬆️
...igrations/convertors/ChangeEventTypeConvertor.java	88.81% <100.00%> (+0.75%)	⬆️
...om/google/cloud/teleport/v2/spanner/type/Type.java	99.47% <100.00%> (+13.28%)	⬆️
...ogle/cloud/teleport/v2/writer/DeadLetterQueue.java	92.50% <71.42%> (-0.25%)	⬇️
...rt/v2/templates/dbutils/dml/MySQLDMLGenerator.java	89.26% <50.00%> (+0.14%)	⬆️
.../templates/dbutils/dml/PostgreSQLDMLGenerator.java	88.23% <50.00%> (+0.15%)	⬆️

... and 30 files with indirect coverage changes

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