Introduced test query to check EXISTS clause
with dependent virtual table. Test fails but it used
to be successful in commit 16e9f67ad3841d511ce682fe4b97e13eb43ad150.
Will backtrack to find where the bug was introduced.
Also silenced Ruby's warnings about '}' used in Regexp without
escape;introduced it. Commented out using namespace directive
without actually being used; LLVM compiler complained.
Removed the superfluous 'using directive';
see previous commit.
Removed unnecessary using namespace directives.
Returning extended error code and message for
prep errors in user-space picoQL.
Three more test queries in VRP SQL array
testing embedded tables in 'exists' clauses.
Fixed bug concerning unsure join validation
when more than one cursors of the virtual
table are open and active_verify =1.
Introduced tests (pre_search) to intercept and correct
wrong guesses (active_owed =1).
User-space tests successful.