S0 doesn't seem to be universally used for SQL grammar problems: see MS SQL Server's RAISERROR. This was reported years back; not sure why the fix didn't actually appear in the codebase back then.

Issue: SPR-10902

Issue: SPR-10130

Issue: SPR-10339

Issue: SPR-10339

SQLErrorCodeSQLExceptionTranslator tries to find SQLException with actual error code, looping through the causes.

Issue: SPR-10260

This reverts commit 45fa5082, reversing
changes made to a312d900.

Issue: SPR-10130

Fix serialization warnings by applying @SuppressWarnings("serial")
when appropriate.

In certain cases and for unknown reasons, a correctly-placed
@SuppressWarnings("serial") annotation will fix the warning at the
javac level (i.e. the Gradle command-line), but will produce an
"unnecessary @SuppressWarnings" warning within Eclipse. In these
cases, a private static final serialVersionUID field has been added
with the default value of 1L.

Issue: SPR-10128

Issue: SPR-10127

  find . -type f -name "*.java" -or -name "*.aj" | \
    xargs perl -p -i -e "s/[ \t]*$//g" {} \;

Issue: SPR-10127

 - Support external Javadoc links using Gradle's javadoc.options.links

 - Fix all other Javadoc warnings, such as typos, references to
   non-existent (or no longer existent) types and members, etc,
   including changes related to the Quartz 2.0 upgrade (SPR-8275) and
   adding the HTTP PATCH method (SPR-7985).

 - Suppress all output for project-level `javadoc` tasks in order to
   hide false-negative warnings about cross-module @see and @link
   references (e.g. spring-core having a @see reference to spring-web).
   Use the `--info` (-i) flag to gradle at any time to see project-level
   javadoc warnings without running the entire `api` task. e.g.
   `gradle :spring-core:javadoc -i`

 - Favor root project level `api` task for detection of legitimate
   Javadoc warnings. There are now zero Javadoc warnings across the
   entirety of spring-framework. Goal: keep it that way.

 - Remove all @link and @see references to types and members that exist
   only in Servlet <= 2.5 and Hibernate <= 4.0, favoring 3.0+ and 4.0+
   respectively. This is necessary because only one version of each of
   these dependencies can be present on the global `api` javadoc task's
   classpath. To that end, the `api` task classpath has now been
   customized to ensure that the Servlet 3 API and Hibernate Core 4 jars
   have precedence.

 - SPR-8896 replaced our dependency on aspectjrt with a dependency on
   aspectjweaver, which is fine from a POM point of view, but causes
   a spurious warning to be emitted from the ant iajc task that it
   "cannot find aspectjrt on the classpath" - even though aspectjweaver
   is perfectly sufficient. In the name of keeping the console quiet, a
   new `rt` configuration has been added, and aspectjrt added as a
   dependency to it. In turn, configurations.rt.asPath is appended to
   the iajc classpath during both compileJava and compileTestJava for
   spring-aspects.

Issue: SPR-10078, SPR-8275, SPR-7985, SPR-8896

Issue: SPR-9962

SPR-7680 added QueryTimeoutException to Spring's DataAccessException
hierarchy, but did not integrate it into the
SQLExceptionSubclassTranslator; it was added mainly to accomodate users
defining their own custom exception translators.

However, it does make sense to translate any SQLTimeoutException to this
new QueryTimeoutException type, and this commit makes that change. It
does represent a slight backward-incompatibility, given that
QueryTimeoutException extends TransientDataAccessException, whereas
SQLExceptionSubclassTranslator previously returned the more specific
TransientDataAccessResourceException for any SQLTimeoutException.

It is expected that this incompatibily will be very low-impact, i.e. not
affecting many (if any) users. In any case, a major release (Spring 3.2)
is the right time to introduce such a change, and the migration path is
straightforward: any users depending on catching
TransientDataAccessResourceException in the case of query timeouts
should update those catch blocks to expect QueryTimeoutException
instead. Care should also be taken to ensure correctness of existing
catch blocks expecting TransientDataAccessException, as these blocks
will now catch QueryTimeoutException as well.

Issue: SPR-9376, SPR-7680

This renaming more intuitively expresses the relationship between
subprojects and the JAR artifacts they produce.

Tracking history across these renames is possible, but it requires
use of the --follow flag to `git log`, for example

    $ git log spring-aop/src/main/java/org/springframework/aop/Advisor.java

will show history up until the renaming event, where

    $ git log --follow spring-aop/src/main/java/org/springframework/aop/Advisor.java

will show history for all changes to the file, before and after the
renaming.

See http://chrisbeams.com/git-diff-across-renamed-directories