fixed possible null pointer error

Change-Id: I58a5285f88e4f6181556c0a76ed3fa2cab36586f
hopefully fixes support for assigning a variable to an empty array

Change-Id: Ib45056451c55ba8eba1181547254797be18d9f51
now using BulkSQLLoader_Direct for mysql

Change-Id: Ice79d69a976522f172634f6742ad9079563b203c
Improved error messages for runtime exceptions

Change-Id: I72770b0d53ce5792db7cc6aa9bfb15e047b32d3c
Fixed ArrayIndexOutOfBoundsError.
Added sqlFilterColumns metadata.

Change-Id: I756c8ab5c5fdd2a7e1c1042ebbb0271e90568e5b
fixed bug where null values wouldn't be turned into ""

Change-Id: Ie4501ef1d5d6db0b6b222b87da179edcf12ea893
fixed case sensitivity bug

Change-Id: I160893b97250522bf35d7a320455e64932e457d3
Merge remote-tracking branch 'origin/master' into foo