diff --git a/frappe/desk/moduleview.py b/frappe/desk/moduleview.py
index e55ee8f706..4c73ec1ba1 100644
--- a/frappe/desk/moduleview.py
+++ b/frappe/desk/moduleview.py
@@ -214,7 +214,7 @@ def get_last_modified(doctype):
 def get_report_list(module, is_standard="No"):
 	"""Returns list on new style reports for modules."""
 	reports =  frappe.get_list("Report", fields=["name", "ref_doctype", "report_type"], filters=
-		{"is_standard": is_standard, "disabled": ("in", ("0", "NULL", "")), "module": module},
+		{"is_standard": is_standard, "disabled": 0, "module": module},
 		order_by="name")
 
 	out = []
diff --git a/frappe/model/db_query.py b/frappe/model/db_query.py
index 452e613434..c3d720436a 100644
--- a/frappe/model/db_query.py
+++ b/frappe/model/db_query.py
@@ -67,6 +67,7 @@ class DatabaseQuery(object):
 		self.ignore_ifnull = ignore_ifnull
 		self.flags.ignore_permissions = ignore_permissions
 		self.user = user or frappe.session.user
+		self.debug = True
 
 		if query:
 			result = self.run_custom_query(query)
@@ -260,19 +261,24 @@ class DatabaseQuery(object):
 		column_name = '{tname}.{fname}'.format(tname=tname,
 			fname=f.fieldname)
 
+		can_be_null = True
+
 		# prepare in condition
 		if f.operator in ('in', 'not in'):
 			values = f.value
 			if not isinstance(values, (list, tuple)):
 				values = values.split(",")
 
-			fallback = ''
+			fallback = "''"
 			value = (frappe.db.escape(v.strip(), percent=False) for v in values)
 			value = '("{0}")'.format('", "'.join(value))
 		else:
 			df = frappe.get_meta(f.doctype).get("fields", {"fieldname": f.fieldname})
 			df = df[0] if df else None
 
+			if df and df.fieldtype=="Check":
+				can_be_null = False
+
 			if df and df.fieldtype=="Date":
 				value = getdate(f.value).strftime("%Y-%m-%d")
 				fallback = "'0000-00-00'"
@@ -303,12 +309,12 @@ class DatabaseQuery(object):
 				value = '"{0}"'.format(frappe.db.escape(value, percent=False))
 
 			if f.fieldname in ("creation", "modified"):
-				column_name = "date_format({tname}.{fname},'%Y-%m-%d')".format(tname=tname,
+				column_name = "date_format({tname}.{fname}, '%Y-%m-%d')".format(tname=tname,
 					fname=f.fieldname)
 
-		if self.ignore_ifnull:
+		if self.ignore_ifnull or not can_be_null:
 			condition = '{column_name} {operator} {value}'.format(
-				column_name=column_name, fallback=fallback, operator=f.operator,
+				column_name=column_name, operator=f.operator,
 				value=value)
 		else:
 			condition = 'ifnull({column_name}, {fallback}) {operator} {value}'.format(