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adam@6
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1 fun sqexps [env] [fields] (fl : folder fields) (inj : $(map sql_injectable fields)) (r : $fields) =
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adam@6
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2 @map2 [sql_injectable] [id] [sql_exp env [] []]
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adam@6
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3 (fn [t] => @sql_inject)
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adam@6
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4 fl inj r
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adam@6
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5
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adam@15
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6 fun selector [tn :: Name] [fs] [ofs] [fs ~ ofs] (fl : folder fs) (m : $(map sql_injectable fs)) (r : $fs)
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adam@15
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7 : sql_exp [tn = ofs ++ fs] [] [] bool =
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adam@6
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8 @foldR2 [sql_injectable] [id]
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adam@6
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9 [fn key => rest :: {Type} -> [rest ~ key] => sql_exp [tn = key ++ rest] [] [] bool]
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adam@6
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10 (fn [nm :: Name] [t :: Type] [key :: {Type}] [[nm] ~ key]
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adam@6
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11 (inj : sql_injectable t) (v : t)
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adam@6
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12 (exp : rest :: {Type} -> [rest ~ key] => sql_exp [tn = key ++ rest] [] [] bool)
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adam@6
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13 [rest :: {Type}] [rest ~ [nm = t] ++ key] =>
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adam@14
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14 (WHERE {{tn}}.{nm} = {@sql_inject inj v} AND {exp [[nm = t] ++ rest]}))
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adam@6
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15 (fn [rest :: {Type}] [rest ~ []] => (WHERE TRUE))
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adam@6
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16 fl m r [_] !
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adam@13
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17
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adam@13
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18 fun joiner [tn1 :: Name] [tn2 :: Name] [fs] [ofs1] [ofs2] [[tn1] ~ [tn2]] [fs ~ ofs1] [fs ~ ofs2]
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adam@15
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19 (fl : folder fs) : sql_exp [tn1 = ofs1 ++ fs, tn2 = ofs2 ++ fs] [] [] bool =
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adam@13
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20 @fold
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adam@13
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21 [fn key => rest1 :: {Type} -> rest2 :: {Type} -> [rest1 ~ key] => [rest2 ~ key] => sql_exp [tn1 = key ++ rest1, tn2 = key ++ rest2] [] [] bool]
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adam@13
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22 (fn [nm :: Name] [t :: Type] [key :: {Type}] [[nm] ~ key]
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adam@13
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23 (exp : rest1 :: {Type} -> rest2 :: {Type} -> [rest1 ~ key] => [rest2 ~ key]
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adam@13
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24 => sql_exp [tn1 = key ++ rest1, tn2 = key ++ rest2] [] [] bool)
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adam@13
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25 [rest1 :: {Type}] [rest2 :: {Type}] [rest1 ~ [nm = t] ++ key] [rest2 ~ [nm = t] ++ key] =>
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adam@14
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26 (WHERE {{tn1}}.{nm} = {{tn2}}.{nm} AND {exp [[nm = t] ++ rest1] [[nm = t] ++ rest2]}))
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adam@13
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27 (fn [rest1 :: {Type}] [rest2 :: {Type}] [rest1 ~ []] [rest2 ~ []] => (WHERE TRUE))
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adam@13
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28 fl [_] [_] ! !
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adam@15
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29
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adam@15
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30 fun insertIfMissing [keyCols ::: {Type}] [otherCols ::: {Type}] [otherKeys ::: {{Unit}}]
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adam@15
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31 [keyCols ~ otherCols] [[Pkey] ~ otherKeys]
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adam@15
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32 (t : sql_table (keyCols ++ otherCols) ([Pkey = map (fn _ => ()) keyCols] ++ otherKeys))
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adam@15
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33 (vs : $(keyCols ++ otherCols))
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adam@15
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34 (kfl : folder keyCols) (kinj : $(map sql_injectable keyCols))
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adam@15
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35 (ofl : folder otherCols) (oinj : $(map sql_injectable otherCols))
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adam@15
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36 : transaction bool =
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adam@15
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37 alreadyThere <- oneRowE1 (SELECT COUNT( * ) > 0
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adam@15
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38 FROM t
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adam@15
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39 WHERE {@selector [#T] ! kfl kinj (vs --- _)});
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adam@15
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40 if alreadyThere then
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adam@15
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41 return False
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adam@15
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42 else
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adam@15
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43 dml (insert t (@sqexps kfl kinj (vs --- _)
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adam@15
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44 ++ @sqexps ofl oinj (vs --- _)));
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adam@15
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45 return True
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adam@15
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46
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adam@15
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47 fun deleteByKey [keyCols ::: {Type}] [otherCols ::: {Type}] [otherKeys ::: {{Unit}}]
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adam@15
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48 [keyCols ~ otherCols] [[Pkey] ~ otherKeys]
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adam@15
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49 (t : sql_table (keyCols ++ otherCols) ([Pkey = map (fn _ => ()) keyCols] ++ otherKeys))
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adam@15
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50 (vs : $keyCols) (kfl : folder keyCols) (kinj : $(map sql_injectable keyCols)) =
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adam@15
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51 dml (delete t (@selector [#T] ! kfl kinj vs))
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