Add Function "LEN" #1196

Do not load the whole LOBs into memory for comparison operation

Fork Sync

DISTINCT does not work with ORDER BY in some queries

Fix MVTempResult implementations for results with invisible columns

Another fix for #1265 : preload DBException

Read nanoseconds of timestamps from old H2 versions properly and remove some dead code

Clean up interaction between LocalResult and ResultExternal

Allow parentheses around final action in WITH

Assorted changes in Parser