In order to make your issue reports as actionable as possible, please provide the following information, depending on the issue type.

Bug report

For bug reports, provide this information, please:

What Debezium connector do you use and what version?

<Your answer>

What is the connector configuration?

<Your answer>

What is the captured database version and mode of depoyment?

(E.g. on-premises, with a specific cloud provider, etc.)

<Your answer>

What behaviour do you expect?

We have a table with a column configured as following

`created_at` bigint(20) NOT NULL DEFAULT unix_timestamp()

We expect that Debezium would handle this case and work normally.

What behaviour do you see?

Debezium fails to ingest the table with following error 

org.apache.kafka.connect.errors.ConnectException: no viable alternative at input 'CREATE TABLE `table_a` (\
  `quote_id` varchar(32) NOT NULL,\
  `created_at` bigint(20) NOT NULL DEFAULT unix_timestamp'

Looking into the code (https://github.com/debezium/debezium/blob/main/debezium-ddl-parser/src/main/antlr4/io/debezium/ddl/parser/mysql/generated/MySqlParser.g4#L2258-L2275) , we think this "DEFAULT unix_timestamp()" is just simply not supported case.

Do you see the same behaviour using the latest relesead Debezium version?

(Ideally, also verify with latest Alpha/Beta/CR version)

<Your answer>

Do you have the connector logs, ideally from start till finish?

(You might be asked later to provide DEBUG/TRACE level log)

<Your answer>

How to reproduce the issue using our tutorial deployment?

<Your answer>

Feature request or enhancement

For feature requests or enhancements, provide this information, please:

We'd like to request that Antlr grammar is updated to support "DEFAULT unix_timestamp"

https://github.com/debezium/debezium/blob/main/debezium-ddl-parser/src/main/antlr4/io/debezium/ddl/parser/mysql/generated/MySqlParser.g4#L2258-L2275 

Which use case/requirement will be addressed by the proposed feature?

Debezium can support this schema which is a valid one.

`created_at` bigint(20) NOT NULL DEFAULT unix_timestamp()

Implementation ideas (optional)

<Your answer>