Minor refactorings

Add support of TIMESTAMP WITH TIME ZONE to addition and subtraction operators

Prefer explicitly defined primary key

Change MVSecondaryIndex uniqueness check

Allow creation of delegate index in ALTER TABLE

Push upper bound check from MVStoreCursor down to underlying map cursor
Propagate database compatibility mode down to Value comparison operation

Modified test script to avoid coincidental success ('HElLo' < 'Hello')

Add support of PERCENT in FETCH and TOP clauses

Mode append fo MVPlainTempResult

Optimize WITH TIES in some queries and specify data types for KEY_COLUMN_USAGE

Bugfix - using default locale encoding issue in conversion between varchar and varbinary value, and checking javac output text issue in SourceCompiler

Do not add rows before OFFSET to result if possible

Treat NEXTVAL as an auto-generated key