[WIP] 811 modified-type coercions silently to zero

[ilidemi]

codex is working

[codecov]

❌ 4 Tests Failed:

Tests completed	Failed	Passed	Skipped
2335	4	2331	213

View the top 3 failed test(s) by shortest run time

github.com/PeerDB-io/peerdb/flow/e2e::TestPeerFlowE2ETestSuiteMySQL_CH

Stack Traces | 0.01s run time

=== RUN   TestPeerFlowE2ETestSuiteMySQL_CH
=== PAUSE TestPeerFlowE2ETestSuiteMySQL_CH
=== CONT  TestPeerFlowE2ETestSuiteMySQL_CH
--- FAIL: TestPeerFlowE2ETestSuiteMySQL_CH (0.01s)

github.com/PeerDB-io/peerdb/flow/e2e::TestPeerFlowE2ETestSuiteMySQL_CH_Cluster

Stack Traces | 0.01s run time

=== RUN   TestPeerFlowE2ETestSuiteMySQL_CH_Cluster
=== PAUSE TestPeerFlowE2ETestSuiteMySQL_CH_Cluster
=== CONT  TestPeerFlowE2ETestSuiteMySQL_CH_Cluster
--- FAIL: TestPeerFlowE2ETestSuiteMySQL_CH_Cluster (0.01s)

github.com/PeerDB-io/peerdb/flow/e2e::TestPeerFlowE2ETestSuiteMySQL_CH/Test_MySQL_NumToVarcharCoercionInvalidValue

Stack Traces | 184s run time

=== RUN   TestPeerFlowE2ETestSuiteMySQL_CH/Test_MySQL_NumToVarcharCoercionInvalidValue
=== PAUSE TestPeerFlowE2ETestSuiteMySQL_CH/Test_MySQL_NumToVarcharCoercionInvalidValue
=== CONT  TestPeerFlowE2ETestSuiteMySQL_CH/Test_MySQL_NumToVarcharCoercionInvalidValue
    clickhouse_mysql_test.go:1336: WaitFor waiting on initial 2026-06-19 05:54:18.542642653 +0000 UTC m=+669.995200237
2026/06/19 05:54:18 INFO fetched schema x-peerdb-additional-metadata={Operation:FLOW_OPERATION_UNKNOWN} table=e2e_test_mych_seu08quy.test_coercion_error
2026/06/19 05:54:18 INFO Received AWS credentials from peer for connector: clickhouse x-peerdb-additional-metadata={Operation:FLOW_OPERATION_UNKNOWN}
    clickhouse_mysql_test.go:1347: WaitFor waiting for coercion error message 2026-06-19 05:54:18.559669031 +0000 UTC m=+670.012226615
2026/06/19 05:54:18 INFO Received AWS credentials from peer for connector: clickhouse x-peerdb-additional-metadata={Operation:FLOW_OPERATION_UNKNOWN}
    clickhouse_mysql_test.go:1347: UNEXPECTED TIMEOUT waiting for coercion error message 2026-06-19 05:57:18.762888694 +0000 UTC m=+850.215446288
--- FAIL: TestPeerFlowE2ETestSuiteMySQL_CH/Test_MySQL_NumToVarcharCoercionInvalidValue (184.28s)

github.com/PeerDB-io/peerdb/flow/e2e::TestPeerFlowE2ETestSuiteMySQL_CH_Cluster/Test_MySQL_NumToVarcharCoercionInvalidValue

Stack Traces | 184s run time

=== RUN   TestPeerFlowE2ETestSuiteMySQL_CH_Cluster/Test_MySQL_NumToVarcharCoercionInvalidValue
=== PAUSE TestPeerFlowE2ETestSuiteMySQL_CH_Cluster/Test_MySQL_NumToVarcharCoercionInvalidValue
=== CONT  TestPeerFlowE2ETestSuiteMySQL_CH_Cluster/Test_MySQL_NumToVarcharCoercionInvalidValue
2026/06/19 05:54:37 INFO Received AWS credentials from peer for connector: ci x-peerdb-additional-metadata={Operation:FLOW_OPERATION_UNKNOWN}
2026/06/19 05:54:37 INFO fetched schema x-peerdb-additional-metadata={Operation:FLOW_OPERATION_UNKNOWN} table=e2e_test_mych_txbde8kn.test_composite_pkey_ordering
    clickhouse_mysql_test.go:1336: WaitFor waiting on initial 2026-06-19 05:54:41.860380373 +0000 UTC m=+693.312937968
2026/06/19 05:54:41 INFO fetched schema x-peerdb-additional-metadata={Operation:FLOW_OPERATION_UNKNOWN} table=e2e_test_mychcl_j5wnhspu.test_coercion_error
    clickhouse_mysql_test.go:1347: WaitFor waiting for coercion error message 2026-06-19 05:54:41.882197136 +0000 UTC m=+693.334754730
    clickhouse_mysql_test.go:1347: UNEXPECTED TIMEOUT waiting for coercion error message 2026-06-19 05:57:42.086900642 +0000 UTC m=+873.539458236
--- FAIL: TestPeerFlowE2ETestSuiteMySQL_CH_Cluster/Test_MySQL_NumToVarcharCoercionInvalidValue (184.34s)

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[github-actions]

❌ Test Failure

Analysis: The WIP PR's own new test Test_MySQL_NumToVarcharCoercionInvalidValue times out waiting for a coercion error message that the in-development feature never emits, failing deterministically in both standalone and cluster variants — a real feature bug, not flakiness.
Confidence: 0.85

⚠️ This appears to be a real bug - manual intervention needed

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