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 fry ;
14 : new-db ( class -- obj )
16 H{ } clone >>insert-statements
17 H{ } clone >>update-statements
18 H{ } clone >>delete-statements ; inline
20 GENERIC: db-open ( db -- db )
21 HOOK: db-close db ( handle -- )
23 : dispose-statements ( assoc -- ) values dispose-each ;
25 M: db dispose ( db -- )
27 [ dispose-statements H{ } clone ] change-insert-statements
28 [ dispose-statements H{ } clone ] change-update-statements
29 [ dispose-statements H{ } clone ] change-delete-statements
30 [ db-close f ] change-handle
34 TUPLE: result-set sql in-params out-params handle n max ;
36 GENERIC: query-results ( query -- result-set )
37 GENERIC: #rows ( result-set -- n )
38 GENERIC: #columns ( result-set -- n )
39 GENERIC# row-column 1 ( result-set column -- obj )
40 GENERIC# row-column-typed 1 ( result-set column -- sql )
41 GENERIC: advance-row ( result-set -- )
42 GENERIC: more-rows? ( result-set -- ? )
44 : init-result-set ( result-set -- )
48 : new-result-set ( query handle class -- result-set )
51 >r [ sql>> ] [ in-params>> ] [ out-params>> ] tri r>
56 TUPLE: statement handle sql in-params out-params bind-params bound? type retries ;
57 TUPLE: simple-statement < statement ;
58 TUPLE: prepared-statement < statement ;
60 : new-statement ( sql in out class -- statement )
66 HOOK: <simple-statement> db ( string in out -- statement )
67 HOOK: <prepared-statement> db ( string in out -- statement )
68 GENERIC: prepare-statement ( statement -- )
69 GENERIC: bind-statement* ( statement -- )
70 GENERIC: low-level-bind ( statement -- )
71 GENERIC: bind-tuple ( tuple statement -- )
73 GENERIC: execute-statement* ( statement type -- )
75 M: object execute-statement* ( statement type -- )
76 drop query-results dispose ;
78 : execute-one-statement ( statement -- )
79 dup type>> execute-statement* ;
81 : execute-statement ( statement -- )
83 [ execute-one-statement ] each
88 : bind-statement ( obj statement -- )
90 [ bind-statement* ] keep
93 : sql-row ( result-set -- seq )
94 dup #columns [ row-column ] with map ;
96 : sql-row-typed ( result-set -- seq )
97 dup #columns [ row-column-typed ] with map ;
99 : query-each ( statement quot: ( statement -- ) -- )
101 [ call ] 2keep over advance-row query-each
104 ] if ; inline recursive
106 : query-map ( statement quot -- seq )
107 accumulator [ query-each ] dip { } like ; inline
109 : with-db ( db quot -- )
111 '[ db get [ drop @ ] with-disposal ] with-variable ; inline
113 ! Words for working with raw SQL statements
114 : default-query ( query -- result-set )
115 query-results [ [ sql-row ] query-map ] with-disposal ;
117 : sql-query ( sql -- rows )
118 f f <simple-statement> [ default-query ] with-disposal ;
120 : (sql-command) ( string -- )
121 f f <simple-statement> [ execute-statement ] with-disposal ;
123 : sql-command ( sql -- )
124 dup string? [ (sql-command) ] [ [ (sql-command) ] each ] if ;
127 SYMBOL: in-transaction
129 HOOK: begin-transaction db ( -- )
130 HOOK: commit-transaction db ( -- )
131 HOOK: rollback-transaction db ( -- )
133 M: db begin-transaction ( -- ) "BEGIN" sql-command ;
134 M: db commit-transaction ( -- ) "COMMIT" sql-command ;
135 M: db rollback-transaction ( -- ) "ROLLBACK" sql-command ;
137 : in-transaction? ( -- ? ) in-transaction get ;
139 : with-transaction ( quot -- )
142 [ ] [ rollback-transaction ] cleanup commit-transaction