Add query package with first set of conditions and tests

database/query/parser.go

@@ -0,0 +1,44 @@
+package query
+
+var (
+	operatorNames = map[string]uint8{
+		"==":         Equals,
+		">":          GreaterThan,
+		">=":         GreaterThanOrEqual,
+		"<":          LessThan,
+		"<=":         LessThanOrEqual,
+		"f==":        FloatEquals,
+		"f>":         FloatGreaterThan,
+		"f>=":        FloatGreaterThanOrEqual,
+		"f<":         FloatLessThan,
+		"f<=":        FloatLessThanOrEqual,
+		"sameas":     SameAs,
+		"s==":        SameAs,
+		"contains":   Contains,
+		"co":         Contains,
+		"startswith": StartsWith,
+		"sw":         StartsWith,
+		"endswith":   EndsWith,
+		"ew":         EndsWith,
+		"in":         In,
+		"matches":    Matches,
+		"re":         Matches,
+		"is":         Is,
+		"exists":     Exists,
+		"ex":         Exists,
+	}
+)
+
+func getOpName(operator uint8) string {
+	for opName, op := range operatorNames {
+		if op == operator {
+			return opName
+		}
+	}
+	return "[unknown]"
+}
+
+// ParseQuery parses a plaintext query.
+func ParseQuery(query string) (*Query, error) {
+	return nil, nil
+}