diff options
author | Adam Chlipala <adamc@hcoop.net> | 2008-09-07 09:28:13 -0400 |
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committer | Adam Chlipala <adamc@hcoop.net> | 2008-09-07 09:28:13 -0400 |
commit | 1777fbbddce252990fc5055e4e5462123938483c (patch) | |
tree | d38bcc3f03b117015ed1691f79c921acf1651bfa /src/prepare.sml | |
parent | 711796ea5b4bf5d36b644eafa1b198ed3e4e1798 (diff) |
Ran a prepared statement with one string parameter
Diffstat (limited to 'src/prepare.sml')
-rw-r--r-- | src/prepare.sml | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/src/prepare.sml b/src/prepare.sml new file mode 100644 index 00000000..67f6e0b6 --- /dev/null +++ b/src/prepare.sml @@ -0,0 +1,180 @@ +(* Copyright (c) 2008, Adam Chlipala + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * - Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * - Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * - The names of contributors may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + *) + +structure Prepare :> PREPARE = struct + +open Cjr + +fun prepString (e, ss, n) = + case #1 e of + EPrim (Prim.String s) => + SOME (s :: ss, n) + | EFfiApp ("Basis", "strcat", [e1, e2]) => + (case prepString (e1, ss, n) of + NONE => NONE + | SOME (ss, n) => prepString (e2, ss, n)) + | EFfiApp ("Basis", "sqlifyInt", [e]) => + SOME ("$" ^ Int.toString (n + 1) ^ "::int8" :: ss, n + 1) + | EFfiApp ("Basis", "sqlifyFloat", [e]) => + SOME ("$" ^ Int.toString (n + 1) ^ "::float8" :: ss, n + 1) + | EFfiApp ("Basis", "sqlifyString", [e]) => + SOME ("$" ^ Int.toString (n + 1) ^ "::text" :: ss, n + 1) + | EFfiApp ("Basis", "sqlifyBool", [e]) => + SOME ("$" ^ Int.toString (n + 1) ^ "::bool" :: ss, n + 1) + + | _ => NONE + +fun prepExp (e as (_, loc), sns) = + case #1 e of + EPrim _ => (e, sns) + | ERel _ => (e, sns) + | ENamed _ => (e, sns) + | ECon (_, _, NONE) => (e, sns) + | ECon (dk, pc, SOME e) => + let + val (e, sns) = prepExp (e, sns) + in + ((ECon (dk, pc, SOME e), loc), sns) + end + | EFfi _ => (e, sns) + | EFfiApp (m, x, es) => + let + val (es, sns) = ListUtil.foldlMap prepExp sns es + in + ((EFfiApp (m, x, es), loc), sns) + end + | EApp (e1, e2) => + let + val (e1, sns) = prepExp (e1, sns) + val (e2, sns) = prepExp (e2, sns) + in + ((EApp (e1, e2), loc), sns) + end + + | ERecord (rn, xes) => + let + val (xes, sns) = ListUtil.foldlMap (fn ((x, e), sns) => + let + val (e, sns) = prepExp (e, sns) + in + ((x, e), sns) + end) sns xes + in + ((ERecord (rn, xes), loc), sns) + end + | EField (e, s) => + let + val (e, sns) = prepExp (e, sns) + in + ((EField (e, s), loc), sns) + end + + | ECase (e, pes, ts) => + let + val (e, sns) = prepExp (e, sns) + val (pes, sns) = ListUtil.foldlMap (fn ((p, e), sns) => + let + val (e, sns) = prepExp (e, sns) + in + ((p, e), sns) + end) sns pes + in + ((ECase (e, pes, ts), loc), sns) + end + + | EWrite e => + let + val (e, sns) = prepExp (e, sns) + in + ((EWrite e, loc), sns) + end + | ESeq (e1, e2) => + let + val (e1, sns) = prepExp (e1, sns) + val (e2, sns) = prepExp (e2, sns) + in + ((ESeq (e1, e2), loc), sns) + end + | ELet (x, t, e1, e2) => + let + val (e1, sns) = prepExp (e1, sns) + val (e2, sns) = prepExp (e2, sns) + in + ((ELet (x, t, e1, e2), loc), sns) + end + + | EQuery {exps, tables, rnum, state, query, body, initial, ...} => + (case prepString (query, [], 0) of + NONE => (e, sns) + | SOME (ss, n) => + ((EQuery {exps = exps, tables = tables, rnum = rnum, + state = state, query = query, body = body, + initial = initial, prepared = SOME (#2 sns)}, loc), + ((String.concat (rev ss), n) :: #1 sns, #2 sns + 1))) + +fun prepDecl (d as (_, loc), sns) = + case #1 d of + DStruct _ => (d, sns) + | DDatatype _ => (d, sns) + | DDatatypeForward _ => (d, sns) + | DVal (x, n, t, e) => + let + val (e, sns) = prepExp (e, sns) + in + ((DVal (x, n, t, e), loc), sns) + end + | DFun (x, n, xts, t, e) => + let + val (e, sns) = prepExp (e, sns) + in + ((DFun (x, n, xts, t, e), loc), sns) + end + | DFunRec fs => + let + val (fs, sns) = ListUtil.foldlMap (fn ((x, n, xts, t, e), sns) => + let + val (e, sns) = prepExp (e, sns) + in + ((x, n, xts, t, e), sns) + end) sns fs + in + ((DFunRec fs, loc), sns) + end + + | DTable _ => (d, sns) + | DDatabase _ => (d, sns) + | DPreparedStatements _ => (d, sns) + +fun prepare (ds, ps) = + let + val (ds, (sns, _)) = ListUtil.foldlMap prepDecl ([], 0) ds + in + ((DPreparedStatements (rev sns), ErrorMsg.dummySpan) :: ds, ps) + end + +end + |