[#11513] fix(catalog-mysql): Fix MySQL catalog incompatible with MariaDB due to case-sensitive CURRENT_TIMESTAMP check

[a19920714liou]

Fix #11513

What changes were proposed in this pull request?

Changed the CURRENT_TIMESTAMP comparison in MysqlColumnDefaultValueConverter from case-sensitive startsWith to case-insensitive StringUtils.startsWithIgnoreCase.

Why are the changes needed?

MariaDB returns default values with different casing (e.g., current_timestamp in lowercase) compared to MySQL (e.g., CURRENT_TIMESTAMP in uppercase). The existing String.startsWith() check is case-sensitive, which causes it to fail when connecting to a MariaDB database via the MySQL catalog, resulting in incorrect default value parsing.

Does this PR introduce any user-facing change?

No user-facing API changes. This fix ensures MariaDB users can correctly use the MySQL catalog with proper default value handling.

How was this patch tested?

Manually tested by connecting the MySQL catalog to a MariaDB instance and verifying that columns with CURRENT_TIMESTAMP as default value are correctly parsed.

[roryqi]

If this is a fix, we should have an issue. Could u create an issue first?

[a19920714liou]

If this is a fix, we should have an issue. Could u create an issue first?

No, I just encountered this issue and made the necessary changes before submitting it directly

[a19920714liou]

If this is a fix, we should have an issue. Could u create an issue first?

Do I need to add an issue？

[roryqi]

If this is a fix, we should have an issue. Could u create an issue first?

Do I need to add an issue？

yes.

[a19920714liou]

If this is a fix, we should have an issue. Could u create an issue first?

Do I need to add an issue？

yes.

#11513

[github-actions]

Code Coverage Report

Overall Project	67.04% -0.01%	🟢
Files changed	37.14%	🔴

Module	Coverage
aliyun	1.72%	🔴
api	46.8%	🟢
authorization-common	85.96%	🟢
aws	3.66%	🔴
azure	2.47%	🔴
catalog-common	10.42%	🔴
catalog-fileset	80.35%	🟢
catalog-glue	67.41%	🟢
catalog-hive	79.35%	🟢
catalog-jdbc-clickhouse	80.02%	🟢
catalog-jdbc-common	45.31%	🟢
catalog-jdbc-doris	80.28%	🟢
catalog-jdbc-hologres	54.03%	🟢
catalog-jdbc-mysql	79.23% -2.76%	🟢
catalog-jdbc-oceanbase	78.38%	🟢
catalog-jdbc-postgresql	82.29%	🟢
catalog-jdbc-starrocks	78.51%	🟢
catalog-kafka	77.01%	🟢
catalog-lakehouse-generic	58.53%	🟢
catalog-lakehouse-hudi	79.1%	🟢
catalog-lakehouse-iceberg	85.94%	🟢
catalog-lakehouse-paimon	79.29%	🟢
catalog-model	77.72%	🟢
cli	44.51%	🟢
client-java	77.91%	🟢
common	50.17%	🟢
core	82.51%	🟢
filesystem-hadoop3	76.97%	🟢
flink	0.0%	🔴
flink-common	46.3%	🟢
flink-runtime	0.0%	🔴
gcp	14.12%	🔴
hadoop-common	10.39%	🔴
hive-metastore-common	53.9%	🟢
iceberg-common	57.41%	🟢
iceberg-rest-server	73.8%	🟢
idp-basic	86.07%	🟢
integration-test-common	0.0%	🔴
jobs	66.17%	🟢
lance-common	20.81%	🔴
lance-rest-server	60.54%	🟢
lineage	53.02%	🟢
optimizer	82.87%	🟢
optimizer-api	21.95%	🔴
server	85.73%	🟢
server-common	73.28%	🟢
spark	28.57%	🔴
spark-common	41.01%	🟢
trino-connector	39.97%	🔴

Files

Module	File	Coverage
catalog-jdbc-mysql	MysqlColumnDefaultValueConverter.java	37.14%	🔴

[yuqi1129]

LGTM

[yuqi1129]

@a19920714liou
Thanks for your contribution, and welcome to join the Gravitno community!!!