refactored read-sql-value to centralize this logic and reduce

[clsql.git] / sql / generic-odbc.lisp

diff --git a/sql/generic-odbc.lisp b/sql/generic-odbc.lisp
index 4995c25ff420a51112e5c553fcc6cec3e43f1545..fd701a9ccd9aa8d35946f53e95365ecc871222f7 100644 (file)
--- a/sql/generic-odbc.lisp
+++ b/sql/generic-odbc.lisp
@@ -44,53 +44,22 @@
           (slot-value db 'list-all-table-columns-fn)
           (intern (symbol-name '#:list-all-table-columns) pkg))))
 
-;;; Object methods
-
-(defmethod read-sql-value (val (type (eql 'boolean))
-                           (database generic-odbc-database)
-                           (db-type (eql :postgresql)))
-  (if (string= "0" val) nil t))
-
-(defmethod read-sql-value (val (type (eql 'generalized-boolean))
-                           (database generic-odbc-database)
-                           (db-type (eql :postgresql)))
-  (if (string= "0" val) nil t))
-
-(defmethod read-sql-value (val (type (eql 'boolean)) database
-                           (db-type (eql :mssql)))
-  (declare (ignore database))
-  (etypecase val
-    (string (if (string= "0" val) nil t))
-    (integer (if (zerop val) nil t))))
-
-(defmethod read-sql-value (val (type (eql 'generalized-boolean)) database
-                           (db-type (eql :mssql)))
-  (declare (ignore database))
-  (etypecase val
-    (string (if (string= "0" val) nil t))
-    (integer (if (zerop val) nil t))))
-
 ;;; Type methods
 
-(defmethod database-get-type-specifier ((type (eql 'wall-time)) args database
-                                        (db-type (eql :mssql)))
-  (declare (ignore args database))
-  "DATETIME")
-
-(defmethod database-get-type-specifier ((type (eql 'date)) args database
+(defmethod database-get-type-specifier ((type symbol) args database
                                         (db-type (eql :mssql)))
-  (declare (ignore args database))
-  "SMALLDATETIME")
-
-(defmethod database-get-type-specifier ((type (eql 'boolean)) args database
-                                        (db-type (eql :mssql)))
-  (declare (ignore args database))
-  "BIT")
-
-(defmethod database-get-type-specifier ((type (eql 'generalized-boolean)) args database
-                                        (db-type (eql :mssql)))
-  (declare (ignore args database))
-  "BIT")
+  "Special database types for MSSQL backends"
+  (declare (ignore database db-type args))
+  (case type
+    (wall-time "DATETIME")
+    (date "SMALLDATETIME")
+    ((generalized-boolean boolean) "BIT")
+    ((longchar text) "ntext")
+    ((varchar string)
+     (if args
+         (format nil "NVARCHAR(~A)" (car args))
+         (format nil "NVARCHAR(~D)" *default-string-length*)))
+    (t (call-next-method))))
 
 ;;; Generation of SQL strings from lisp expressions
 
@@ -99,16 +68,6 @@
     (:mssql "1")
     (t "'Y'")))
 
-(defmethod database-output-sql-as-type ((type (eql 'boolean)) val database
-                                        (db-type (eql :mssql)))
-  (declare (ignore database))
-  (if val 1 0))
-
-(defmethod database-output-sql-as-type ((type (eql 'generalized-boolean)) val database
-                                        (db-type (eql :mssql)))
-  (declare (ignore database))
-  (if val 1 0))
-
 ;;; Database backend capabilities
 
 (defmethod db-type-use-fully-qualified-column-on-drop-index? ((db-type (eql :mssql)))