fix (parse): queries with multiple columns need to properly handle

right-side logic expressions when they are complete expressions (having
both a left and right side).

mql_test.go

@@ -67,6 +67,15 @@ func TestParse(t *testing.T) {
 				Args:      []any{"alice", "[email protected]", "1", 21, 1.5},
 			},
 		},
+		{
+			name:  "success-multi-columned",
+			query: "(name=`alice`) and (email=`[email protected]`) and (member_number = 1)",
+			model: &testModel{},
+			want: &mql.WhereClause{
+				Condition: "(name=? and (email=? and member_number=?))",
+				Args:      []any{"alice", "[email protected]", "1"},
+			},
+		},
 		{
 			name:  "null-string",
 			query: "name=\"null\"",

parser.go

@@ -63,6 +63,14 @@ TkLoop:
 				return nil, fmt.Errorf("%s: %w before right side expression in: %q", op, ErrMissingLogicalOp, p.raw)
 			// finally, assign the right expr
 			case logicExpr.rightExpr == nil:
+				if e.rightExpr != nil {
+					// if e.rightExpr isn't nil, then we've got a complete
+					// expr (left + op + right) and we need to assign this to
+					// our rightExpr
+					logicExpr.rightExpr = e
+					break TkLoop
+				}
+				// otherwise, we need to assign the left side of e to our
 				logicExpr.rightExpr = e.leftExpr
 				break TkLoop
 			}