RFR: 8369432: Add Support for JDBC 4.5 MR [v6]

[Johannes Döbler]

On Wed, 15 Oct 2025 20:04:45 GMT, Lance Andersen <lancea at openjdk.org> wrote:

>> This PR adds support for the upcoming JDBC 4.5 MR which provides the following  updates to the JDBC specification:
>> 
>> - Deprecate SQLPermission for removal
>> - Enhance the Blob/Clob/Array/SQLXML/NClob interfaces to extend/support AutoClosable
>> - Add the SQL types DECFLOAT, JSON to Types.Java and JDBCType.java
>> - Add the quoted identifier methods that **were added previously to the Statement interface in JDK 9** to the Connection interface
>>   - It is the exact same verbiage & default methods used when these methods were added to the Statement interface
>> - Clarify the Timestamp::hashCode method which incorrectly indicates that nanos are not used when calculating the hash
>> 
>> Tiers 1-3 have been run
>
> Lance Andersen has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Move fields from package-private to private

src/java.sql/share/classes/java/sql/Statement.java line 1408:

> 1406:      */
> 1407:      default String enquoteLiteral(String val) throws SQLException {
> 1408:          return SQLUtils.enquoteLiteral(val);

Suggestion: `return getConnection().enquoteLiteral(val);` to allow JDBC driver implementors have a single site to override behavior

src/java.sql/share/classes/java/sql/Statement.java line 1627:

> 1625:     */
> 1626:     default String enquoteNCharLiteral(String val) throws SQLException {
> 1627:         return SQLUtils.enquoteNCharLiteral(val);

Suggestion: `return getConnection().enquoteNCharLiteral(val);` to allow JDBC driver implementors have a single site to override behavior

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PR Review Comment: https://git.openjdk.org/jdk/pull/27693#discussion_r2433814167
PR Review Comment: https://git.openjdk.org/jdk/pull/27693#discussion_r2433815844