1 ! Copyright (C) 2008 Doug Coleman.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: arrays assocs classes continuations destructors kernel math
4 namespaces sequences classes.tuple words strings
5 tools.walker accessors combinators ;
14 : new-db ( class -- obj )
16 H{ } clone >>insert-statements
17 H{ } clone >>update-statements
18 H{ } clone >>delete-statements ; inline
20 GENERIC: make-db* ( object db -- db )
22 : make-db ( object class -- db ) new-db make-db* ;
24 GENERIC: db-open ( db -- db )
25 HOOK: db-close db ( handle -- )
27 : dispose-statements ( assoc -- ) values dispose-each ;
29 : db-dispose ( db -- )
32 [ insert-statements>> dispose-statements ]
33 [ update-statements>> dispose-statements ]
34 [ delete-statements>> dispose-statements ]
39 TUPLE: result-set sql in-params out-params handle n max ;
41 GENERIC: query-results ( query -- result-set )
42 GENERIC: #rows ( result-set -- n )
43 GENERIC: #columns ( result-set -- n )
44 GENERIC# row-column 1 ( result-set column -- obj )
45 GENERIC# row-column-typed 1 ( result-set column -- sql )
46 GENERIC: advance-row ( result-set -- )
47 GENERIC: more-rows? ( result-set -- ? )
49 : init-result-set ( result-set -- )
53 : new-result-set ( query handle class -- result-set )
56 >r [ sql>> ] [ in-params>> ] [ out-params>> ] tri r>
61 TUPLE: statement handle sql in-params out-params bind-params bound? type retries ;
62 TUPLE: simple-statement < statement ;
63 TUPLE: prepared-statement < statement ;
65 : new-statement ( sql in out class -- statement )
71 HOOK: <simple-statement> db ( string in out -- statement )
72 HOOK: <prepared-statement> db ( string in out -- statement )
73 GENERIC: prepare-statement ( statement -- )
74 GENERIC: bind-statement* ( statement -- )
75 GENERIC: low-level-bind ( statement -- )
76 GENERIC: bind-tuple ( tuple statement -- )
78 GENERIC: execute-statement* ( statement type -- )
80 M: object execute-statement* ( statement type -- )
81 drop query-results dispose ;
83 : execute-statement ( statement -- )
85 [ execute-statement ] each
87 dup type>> execute-statement*
90 : bind-statement ( obj statement -- )
92 [ bind-statement* ] keep
95 : sql-row ( result-set -- seq )
96 dup #columns [ row-column ] with map ;
98 : sql-row-typed ( result-set -- seq )
99 dup #columns [ row-column-typed ] with map ;
101 : query-each ( statement quot: ( statement -- ) -- )
103 [ call ] 2keep over advance-row query-each
106 ] if ; inline recursive
108 : query-map ( statement quot -- seq )
109 accumulator [ query-each ] dip { } like ; inline
111 : with-db ( seq class quot -- )
112 [ make-db db-open db ] dip
113 [ db get swap [ drop ] prepose with-disposal ] curry with-variable ;
116 : default-query ( query -- result-set )
117 query-results [ [ sql-row ] query-map ] with-disposal ;
119 : sql-query ( sql -- rows )
120 f f <simple-statement> [ default-query ] with-disposal ;
122 : sql-command ( sql -- )
124 f f <simple-statement> [ execute-statement ] with-disposal
131 SYMBOL: in-transaction
132 HOOK: begin-transaction db ( -- )
133 HOOK: commit-transaction db ( -- )
134 HOOK: rollback-transaction db ( -- )
136 M: db begin-transaction ( -- ) "BEGIN" sql-command ;
137 M: db commit-transaction ( -- ) "COMMIT" sql-command ;
138 M: db rollback-transaction ( -- ) "ROLLBACK" sql-command ;
140 : in-transaction? ( -- ? ) in-transaction get ;
142 : with-transaction ( quot -- )
145 [ ] [ rollback-transaction ] cleanup commit-transaction