[FLINK-24882] Make SQL format identifier NOT case-sensitive.

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Not A Problem
• Affects Version/s: 1.13.2
• Component/s: Table SQL / Client
• Assignee: Unassigned
• Reporter: Moses
• Created: 12/Nov/21 03:26
• Updated: 15/Nov/21 04:22
• Resolved: 15/Nov/21 04:22

Description

If I use upper-case format identifier like below:

CREATE TABLE t_table_1 (a INT) WITH (..., 'format' = 'JSON', ...)

Then I got `Could not find factory ...` exception.

[ERROR] Could not execute SQL statement. Reason:
org.apache.flink.table.api.ValidationException: Could not find any factory for identifier 'JSON' that implements 'org.apache.flink.table.factories.DeserializationFormatFactory' in the classpath.

Available factory identifiers are:

avro
canal-json
csv
debezium-json
json
maxwell-json
raw

And this can be fix with comparing them ignoring case.