synbase: query: add "is nil" and "is not nil" expressions.

Change-Id: Idb02b8a471a20f207d577822c43c14f5788c7722
6 files changed
tree: d789c5b9ff0445ebf3db1e5c3f8ccea3fdafc32e
  1. v23/
  2. x/
  3. .gitignore
  4. AUTHORS
  5. CONTRIBUTORS
  6. LICENSE
  7. PATENTS
  8. VERSION