1 ! Copyright (C) 2008 Doug Coleman.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors kernel math namespaces sequences random strings
4 math.parser math.intervals combinators math.bitwise nmake db
5 db.tuples db.types db.sql classes words shuffle arrays ;
8 GENERIC: where ( specs obj -- )
10 : maybe-make-retryable ( statement -- statement )
11 dup in-params>> [ generator-bind? ] contains?
12 [ make-retryable ] when ;
14 : query-make ( class quot -- )
16 [ 0 sql-counter rot with-variable ] curry { "" { } { } } nmake
17 <simple-statement> maybe-make-retryable ; inline
19 M: db begin-transaction ( -- ) "BEGIN" sql-command ;
20 M: db commit-transaction ( -- ) "COMMIT" sql-command ;
21 M: db rollback-transaction ( -- ) "ROLLBACK" sql-command ;
23 : where-primary-key% ( specs -- )
25 find-primary-key dup column-name>> 0% " = " 0% bind% ;
27 M: db <update-tuple-statement> ( class -- statement )
32 [ ", " 0% ] [ dup column-name>> 0% " = " 0% bind% ] interleave
36 M: random-id-generator eval-generator ( singleton -- obj )
38 system-random-generator get [
39 63 [ 2^ random ] keep 1 - set-bit
42 : interval-comparison ( ? str -- str )
43 "from" = " >" " <" ? swap [ "= " append ] when ;
45 : (infinite-interval?) ( interval -- ?1 ?2 )
46 [ from>> ] [ to>> ] bi
47 [ first fp-infinity? ] bi@ ;
49 : double-infinite-interval? ( obj -- ? )
50 dup interval? [ (infinite-interval?) and ] [ drop f ] if ;
52 : infinite-interval? ( obj -- ? )
53 dup interval? [ (infinite-interval?) or ] [ drop f ] if ;
55 : where-interval ( spec obj from/to -- )
56 over first fp-infinity? [
60 >r first2 r> interval-comparison 0%
64 : in-parens ( quot -- )
65 "(" 0% call ")" 0% ; inline
67 M: interval where ( spec obj -- )
69 [ from>> "from" where-interval ] [
70 nip infinite-interval? [ " and " 0% ] unless
71 ] [ to>> "to" where-interval ] 2tri
74 M: sequence where ( spec obj -- )
76 [ " or " 0% ] [ dupd where ] interleave drop
79 : object-where ( spec obj -- )
80 over column-name>> 0% " = " 0% bind# ;
82 M: object where ( spec obj -- ) object-where ;
84 M: integer where ( spec obj -- ) object-where ;
86 M: string where ( spec obj -- ) object-where ;
88 : filter-slots ( tuple specs -- specs' )
90 slot-name>> swap get-slot-named
91 dup double-infinite-interval? [ drop f ] when
94 : where-clause ( tuple specs -- )
101 2dup slot-name>> swap get-slot-named where
105 M: db <delete-tuples-statement> ( tuple table -- sql )
111 M: db <select-by-slots-statement> ( tuple class -- statement )
115 [ dup column-name>> 0% 2, ] interleave
121 : do-group ( tuple groups -- )
123 ", " join " group by " prepend append
124 ] curry change-sql drop ;
126 : do-order ( tuple order -- )
128 ", " join " order by " prepend append
129 ] curry change-sql drop ;
131 : do-offset ( tuple n -- )
133 number>string " offset " prepend append
134 ] curry change-sql drop ;
136 : do-limit ( tuple n -- )
138 number>string " limit " prepend append
139 ] curry change-sql drop ;
141 : make-query ( tuple query -- tuple' )
144 [ group>> [ drop ] [ do-group ] if-empty ]
145 [ order>> [ drop ] [ do-order ] if-empty ]
146 [ limit>> [ do-limit ] [ drop ] if* ]
147 [ offset>> [ do-offset ] [ drop ] if* ]
150 M: db <query> ( tuple class query -- tuple )
151 [ <select-by-slots-statement> ] dip make-query ;
153 ! select ID, NAME, SCORE from EXAM limit 1 offset 3
155 : select-tuples* ( tuple -- statement )
159 dup class db-columns [ ", " 0, ]
160 [ dup column-name>> 0, 2, ] interleave
163 ] { { } { } { } } nmake
164 >r >r parse-sql 4drop r> r>
165 <simple-statement> maybe-make-retryable do-select ;
167 M: db <count-statement> ( tuple class groups -- statement )
170 [ [ "select count(*) from " 0% 0% where-clause ] query-make ]
173 : create-index ( index-name table-name columns -- )
175 >r >r "create index " % % r> " on " % % r> "(" %
177 ] "" make sql-command ;
179 : drop-index ( index-name -- )
180 [ "drop index " % % ] "" make sql-command ;