Update AbstractPostgresCompatibleDialect.java

[xushsh163]

When there is a conflict between a field name and a keyword in a PostgreSQL table, it is necessary to use quotation marks

[MartijnVisser]

@xushsh163 Thanks for the PR, can you please make sure that a test is added for this scenario. Ideally with a test we would be able to identify that this is indeed not working without your change

[xushsh163]

@MartijnVisser
In postgresql 13.10
CREATE TABLE TEST( "LEFT" CHAR(20) );
In Flink 1.16.0 SQL-Client
CREATE TABLE test ( LEFT` STRING
) WITH (
'connector' = 'jdbc',
'url' = 'jdbc:postgresql://xxxxx:5432/reporting',
'table-name' = 'test',
'username' = 'xxx',
'password' = 'xxx'
);

select * from test limit 10;`

Error:
[ERROR] Could not execute SQL statement. Reason:
org.postgresql.util.PSQLException: ERROR: syntax error at or near "FROM"
Position: 13

[MartijnVisser]

In postgresql 13.10

Yes, but I would like to see that added as a test in this PR, so it can be automatically included and validated in the future as well.

[xushsh163]

@MartijnVisser Sorry, I am not a professional open-source maintainer, so it is difficult for me to write a standardized test case that meets your project's specifications. Perhaps you can treat this PR as an issue and fix it by your team. Then I will close this PR.