I have the exact same problem. I upgraded to last version (Luna) and in a new worksapce. The problem remains. Did you resolve this? I don't know if this matters but: This eclipse is working on a VM with cloudera. This VM is on windows. I can veiw the content of the tables, but not execute SQL statments. The oracle DB is instal·led on windows. And I haver another eclipse in windows that does execute SQL statements (froam Toad plugin).
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