1 ! Copyright (C) 2008 Doug Coleman.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors arrays byte-arrays classes classes.tuple
4 combinators continuations db db.errors db.tuples
5 db.tuples.private db.types destructors kernel make math
6 math.bitwise math.intervals math.parser namespaces nmake random
10 GENERIC: where ( specs obj -- )
13 : make-retryable ( obj -- obj' )
15 [ make-retryable ] map
21 : maybe-make-retryable ( statement -- statement )
22 dup in-params>> [ generator-bind? ] any?
23 [ make-retryable ] when ;
25 : regenerate-params ( statement -- statement )
27 [ bind-params>> ] [ in-params>> ] bi
30 generator-singleton>> eval-generator >>value
34 ] 2map >>bind-params ;
36 M: retryable execute-statement*
37 drop [ retries>> <iota> ] [
40 [ query-results dispose t ]
42 [ regenerate-params bind-statement* f ] cleanup
44 ] bi attempt-all drop ;
46 : sql-props ( class -- columns table )
47 [ db-columns ] [ db-table-name ] bi ;
49 : query-make ( ..a class quot: ( ..a columns table -- ..b ) -- ..b statements )
50 ! query, input, outputs, secondary queries
52 '[ 0 sql-counter [ dup "table-name" set @ ] with-variable ]
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-connection <update-tuple-statement>
70 [ ", " 0% ] [ dup column-name>> 0% " = " 0% bind% ] interleave
74 M: random-id-generator eval-generator
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
107 [ from>> "from" where-interval ] [
108 nip infinite-interval? [ " and " 0% ] unless
109 ] [ to>> "to" where-interval ] 2tri
114 [ " or " 0% ] [ dupd where ] interleave drop
118 over column-name>> 0% " = " 0% bind# ;
121 drop column-name>> 0% " is NULL" 0% ;
123 : object-where ( spec obj -- )
124 over column-name>> 0% " = " 0% bind# ;
126 M: object where object-where ;
128 M: integer where object-where ;
130 M: string where object-where ;
132 : filter-slots ( tuple specs -- specs' )
134 slot-name>> swap get-slot-named
135 dup double-infinite-interval? [ drop f ] when
138 : many-where ( tuple seq -- )
142 2dup slot-name>> swap get-slot-named where
145 : where-clause ( tuple specs -- )
146 dupd filter-slots [ drop ] [ many-where ] if-empty ;
148 M: db-connection <delete-tuples-statement>
154 ERROR: all-slots-ignored class ;
156 M: db-connection <select-by-slots-statement>
159 [ dupd filter-ignores ] dip
160 over empty? [ all-slots-ignored ] when
163 [ dup column-name>> 0% 2, ] interleave
168 : do-group ( tuple groups -- )
169 dup string? [ 1array ] when
170 [ ", " join " group by " glue ] curry change-sql drop ;
172 : do-order ( tuple order -- )
173 dup string? [ 1array ] when
174 [ ", " join " order by " glue ] curry change-sql drop ;
176 : do-offset ( tuple n -- )
177 [ number>string " offset " glue ] curry change-sql drop ;
179 : do-limit ( tuple n -- )
180 [ number>string " limit " glue ] curry change-sql drop ;
182 : make-query* ( tuple query -- tuple' )
185 [ group>> [ drop ] [ do-group ] if-empty ]
186 [ order>> [ drop ] [ do-order ] if-empty ]
187 [ limit>> [ do-limit ] [ drop ] if* ]
188 [ offset>> [ do-offset ] [ drop ] if* ]
191 M: db-connection query>statement
192 [ tuple>> dup class-of ] keep
193 [ <select-by-slots-statement> ] dip make-query* ;
195 ! select ID, NAME, SCORE from EXAM limit 1 offset 3
197 M: db-connection <count-statement>
198 [ tuple>> dup class-of ] keep
199 [ [ "select count(*) from " 0% 0% where-clause ] query-make ]
202 : create-index ( index-name table-name columns -- )
204 [ [ "create index " % % ] dip " on " % % ] dip "(" %
206 ] "" make sql-command ;
208 : ensure-index ( index-name table-name columns -- )
209 '[ _ _ _ create-index ] ignore-index-exists ;
211 : drop-index ( index-name -- )
212 [ "drop index " % % ] "" make sql-command ;
214 : create-database ( string -- )
215 "create database " ";" surround sql-command ;
217 : ensure-database ( string -- )
218 '[ _ create-database ] ignore-database-exists ;