Skip to content

Source-MySQL: Update CDC conversion logic to handle null values for non-null columns by converting them to the default epoch value #67623

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
wants to merge 2 commits into
base: master
Choose a base branch
from
+83 −44
Open

Source-MySQL: Update CDC conversion logic to handle null values for non-null columns by converting them to the default epoch value #67623

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
3745776
Source-MySQL: Update CDC conversion logic to handle null values for n…
yardencarmeli Oct 10, 2025
df4e390
update changelog
yardencarmeli Oct 11, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 1 addition & 1 deletion airbyte-integrations/connectors/source-mysql/metadata.yaml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,7 @@ data:
connectorSubtype: database
connectorType: source
definitionId: 435bb9a5-7887-4809-aa58-28c27df0d7ad
dockerImageTag: 3.50.9
dockerImageTag: 3.50.10
dockerRepository: airbyte/source-mysql
documentationUrl: https://docs.airbyte.com/integrations/sources/mysql
githubIssueLabel: source-mysql
Expand Down
50 changes: 44 additions & 6 deletions ...l/src/main/kotlin/io/airbyte/integrations/source/mysql/MySqlSourceCdcTemporalConverter.kt
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -37,7 +37,12 @@ class MySqlSourceCdcTemporalConverter : RelationalColumnCustomConverter {
TimeHandler,
TimestampHandler
)

/**
* Handles zero-dates (e.g., '0000-00-00 00:00:00') which MySQL allows in NON-NULLABLE columns
* but are invalid dates that JDBC drivers return as NULL. We are now converting those NULL
* values to epoch (1970-01-01...) to match default value behavior and satisfy Debezium's
* non-nullable schema constraints.
*/
data object DatetimeMillisHandler : RelationalColumnCustomConverter.Handler {

override fun matches(column: RelationalColumn): Boolean =
Expand All @@ -48,7 +53,14 @@ class MySqlSourceCdcTemporalConverter : RelationalColumnCustomConverter {

override val partialConverters: List<PartialConverter> =
listOf(
NullFallThrough,
PartialConverter {
if (it == null) {
Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Is your input here a null?
In that case in the old connector we fixed this by setting another property

props.setProperty("value.converter.replace.null.with.default", "false")

This was a bug in debezium which goes into kafka.

But setting this property you should be able to return a NULL and then let debezium place the default value.
See in the old CDK: DebeziumPropertiesManager

val epoch = LocalDateTime.ofInstant(Instant.EPOCH, ZoneOffset.UTC)
Converted(epoch.format(LocalDateTimeCodec.formatter))
} else {
NoConversion
}
},
PartialConverter {
if (it is LocalDateTime) {
Converted(it.format(LocalDateTimeCodec.formatter))
Expand Down Expand Up @@ -80,7 +92,14 @@ class MySqlSourceCdcTemporalConverter : RelationalColumnCustomConverter {

override val partialConverters: List<PartialConverter> =
listOf(
NullFallThrough,
PartialConverter {
if (it == null) {
val epoch = LocalDateTime.ofInstant(Instant.EPOCH, ZoneOffset.UTC)
Converted(epoch.format(LocalDateTimeCodec.formatter))
} else {
NoConversion
}
},
PartialConverter {
if (it is LocalDateTime) {
Converted(it.format(LocalDateTimeCodec.formatter))
Expand Down Expand Up @@ -112,7 +131,14 @@ class MySqlSourceCdcTemporalConverter : RelationalColumnCustomConverter {

override val partialConverters: List<PartialConverter> =
listOf(
NullFallThrough,
PartialConverter {
if (it == null) {
val epoch = LocalDate.ofEpochDay(0)
Converted(epoch.format(LocalDateCodec.formatter))
} else {
NoConversion
}
},
PartialConverter {
if (it is LocalDate) {
Converted(it.format(LocalDateCodec.formatter))
Expand All @@ -131,7 +157,11 @@ class MySqlSourceCdcTemporalConverter : RelationalColumnCustomConverter {
}
)
}

/**
* TIME supports '00:00:00' and it is considered valid, see
* https://dev.mysql.com/doc/refman/8.0/en/time.html. If we get a null value from the server, it
* means the TIME is invalid/corrupt and in that case we should return null.
*/
data object TimeHandler : RelationalColumnCustomConverter.Handler {

override fun matches(column: RelationalColumn): Boolean =
Expand Down Expand Up @@ -164,14 +194,22 @@ class MySqlSourceCdcTemporalConverter : RelationalColumnCustomConverter {
}

data object TimestampHandler : RelationalColumnCustomConverter.Handler {

override fun matches(column: RelationalColumn): Boolean =
column.typeName().equals("TIMESTAMP", ignoreCase = true)

override fun outputSchemaBuilder(): SchemaBuilder = SchemaBuilder.string()

override val partialConverters: List<PartialConverter> =
listOf(
NullFallThrough,
PartialConverter {
if (it == null) {
val epoch = OffsetDateTime.ofInstant(Instant.EPOCH, ZoneOffset.UTC)
Converted(epoch.format(OffsetDateTimeCodec.formatter))
} else {
NoConversion
}
},
PartialConverter {
if (it is ZonedDateTime) {
val offsetDateTime: OffsetDateTime = it.toOffsetDateTime()
Expand Down
Loading
Loading