New database scheme, storing key name inside tables for improving searching

[mojodb.git] / dbutils.py

diff --git a/dbutils.py b/dbutils.py
new file mode 100644 (file)
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+++ b/dbutils.py
@@ -0,0 +1,53 @@
+# -*- coding: utf-8 -*-
+##############################################################################
+#
+#    mojo, a Python library for implementing document based databases
+#    Copyright (C) 2013-2014 by Javier Sancho Fernandez <jsf at jsancho dot org>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation, either version 3 of the License, or
+#    (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+##############################################################################
+
+class SQLGeneric(object):
+    def sql(self):
+        return ""
+
+
+class Query(SQLGeneric):
+    def __init__(self, fields, tables, constraints):
+        self.fields = fields
+        self.tables = tables
+        self.constraints = constraints
+
+
+class Field(SQLGeneric):
+    def __init__(self, table, field_name):
+        self.table = table
+        self.field_name = field_name
+
+
+class Table(SQLGeneric):
+    def __init__(self, db_name, table_name):
+        self.db_name = db_name
+        self.table_name = table_name
+
+
+class Constraint(SQLGeneric):
+    def __init__(self, operator, *args):
+        self.operator = operator
+        self.args = args
+
+class Literal(SQLGeneric):
+    def __init__(self, value):
+        self.value = value