Changed DB to store node positions as Ordinals.

sql/connection.h

Index: sql/connection.h
diff --git a/sql/connection.h b/sql/connection.h
index 65020a04ebb86e0842f1048d119e2d88185b4fbf..c673e2b084cd41e913b361f9136a5a36844e2b78 100644
--- a/sql/connection.h
+++ b/sql/connection.h
@@ -24,6 +24,16 @@ namespace sql {
 
 class Statement;
 
+// Possible return values from ColumnType in a statement. These should match
+// the values in sqlite3.h.
+enum ColType {
+  COLUMN_TYPE_INTEGER = 1,
+  COLUMN_TYPE_FLOAT = 2,
+  COLUMN_TYPE_TEXT = 3,
+  COLUMN_TYPE_BLOB = 4,
+  COLUMN_TYPE_NULL = 5,
+};
+
 // Uniquely identifies a statement. There are two modes of operation:
 //
 // - In the most common mode, you will use the source file and line number to
@@ -289,6 +299,9 @@ class SQL_EXPORT Connection {
   // Returns true if a column with the given name exists in the given table.
   bool DoesColumnExist(const char* table_name, const char* column_name) const;
 
+  // Returns the type/affinity of the given column in the given table.
+  ColType GetColumnType(char* table_name, int column_index) const;
+
   // Returns sqlite's internal ID for the last inserted row. Valid only
   // immediately after an insert.
   int64 GetLastInsertRowId() const;