1 ! Copyright (C) 2008 Doug Coleman.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors kernel math namespaces make sequences random
4 strings math.parser math.intervals combinators math.bitwise
5 nmake db db.tuples db.types classes words shuffle arrays
6 destructors continuations db.tuples.private prettyprint ;
9 GENERIC: where ( specs obj -- )
12 : make-retryable ( obj -- obj' )
14 [ make-retryable ] map
20 : maybe-make-retryable ( statement -- statement )
21 dup in-params>> [ generator-bind? ] contains?
22 [ make-retryable ] when ;
24 : regenerate-params ( statement -- statement )
26 [ bind-params>> ] [ in-params>> ] bi
29 generator-singleton>> eval-generator >>value
33 ] 2map >>bind-params ;
35 M: retryable execute-statement* ( statement type -- )
39 [ query-results dispose t ]
41 [ regenerate-params bind-statement* f ] cleanup
43 ] bi attempt-all drop ;
45 : sql-props ( class -- columns table )
46 [ db-columns ] [ db-table ] bi ;
48 : query-make ( class quot -- statements )
49 #! query, input, outputs, secondary queries
50 over unparse "table" set
52 [ 0 sql-counter rot with-variable ] curry
53 { "" { } { } { } } nmake
54 [ <simple-statement> maybe-make-retryable ] dip
55 [ [ 1array ] dip append ] unless-empty ; inline
57 : where-primary-key% ( specs -- )
62 dup column-name>> 0% " = " 0% bind%
65 M: db <update-tuple-statement> ( class -- statement )
70 [ ", " 0% ] [ dup column-name>> 0% " = " 0% bind% ] interleave
74 M: random-id-generator eval-generator ( singleton -- obj )
76 system-random-generator get [
77 63 [ random-bits ] keep 1- set-bit
80 : interval-comparison ( ? str -- str )
81 "from" = " >" " <" ? swap [ "= " append ] when ;
83 : (infinite-interval?) ( interval -- ?1 ?2 )
84 [ from>> ] [ to>> ] bi
85 [ first fp-infinity? ] bi@ ;
87 : double-infinite-interval? ( obj -- ? )
88 dup interval? [ (infinite-interval?) and ] [ drop f ] if ;
90 : infinite-interval? ( obj -- ? )
91 dup interval? [ (infinite-interval?) or ] [ drop f ] if ;
93 : where-interval ( spec obj from/to -- )
94 over first fp-infinity? [
98 [ first2 ] dip interval-comparison 0%
102 : in-parens ( quot -- )
103 "(" 0% call ")" 0% ; inline
105 M: interval where ( spec obj -- )
107 [ from>> "from" where-interval ] [
108 nip infinite-interval? [ " and " 0% ] unless
109 ] [ to>> "to" where-interval ] 2tri
112 M: sequence where ( spec obj -- )
114 [ " or " 0% ] [ dupd where ] interleave drop
117 M: NULL where ( spec obj -- )
118 drop column-name>> 0% " is NULL" 0% ;
120 : object-where ( spec obj -- )
121 over column-name>> 0% " = " 0% bind# ;
123 M: object where ( spec obj -- ) object-where ;
125 M: integer where ( spec obj -- ) object-where ;
127 M: string where ( spec obj -- ) object-where ;
129 : filter-slots ( tuple specs -- specs' )
131 slot-name>> swap get-slot-named
132 dup double-infinite-interval? [ drop f ] when
135 : many-where ( tuple seq -- )
139 2dup slot-name>> swap get-slot-named where
142 : where-clause ( tuple specs -- )
143 dupd filter-slots [ drop ] [ many-where ] if-empty ;
145 M: db <delete-tuples-statement> ( tuple table -- sql )
151 ERROR: all-slots-ignored class ;
153 M: db <select-by-slots-statement> ( tuple class -- statement )
156 [ dupd filter-ignores ] dip
157 over empty? [ all-slots-ignored ] when
160 [ dup column-name>> 0% 2, ] interleave
165 : do-group ( tuple groups -- )
166 dup string? [ 1array ] when
167 [ ", " join " group by " glue ] curry change-sql drop ;
169 : do-order ( tuple order -- )
170 dup string? [ 1array ] when
171 [ ", " join " order by " glue ] curry change-sql drop ;
173 : do-offset ( tuple n -- )
174 [ number>string " offset " glue ] curry change-sql drop ;
176 : do-limit ( tuple n -- )
177 [ number>string " limit " glue ] curry change-sql drop ;
179 : make-query* ( tuple query -- tuple' )
182 [ group>> [ drop ] [ do-group ] if-empty ]
183 [ order>> [ drop ] [ do-order ] if-empty ]
184 [ limit>> [ do-limit ] [ drop ] if* ]
185 [ offset>> [ do-offset ] [ drop ] if* ]
188 M: db query>statement ( query -- tuple )
189 [ tuple>> dup class ] keep
190 [ <select-by-slots-statement> ] dip make-query* ;
192 ! select ID, NAME, SCORE from EXAM limit 1 offset 3
194 M: db <count-statement> ( query -- statement )
195 [ tuple>> dup class ] keep
196 [ [ "select count(*) from " 0% 0% where-clause ] query-make ]
199 : create-index ( index-name table-name columns -- )
201 [ [ "create index " % % ] dip " on " % % ] dip "(" %
203 ] "" make sql-command ;
205 : drop-index ( index-name -- )
206 [ "drop index " % % ] "" make sql-command ;