Mercurial > urweb

annotate src/sqlite.sml @ 1329:9be9da2df74b

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Clarifying some C FFI details in manual
author Adam Chlipala <adam@chlipala.net>
date Sat, 11 Dec 2010 11:00:05 -0500
parents 929981850d9d
children 703c2c94afd5
rev   line source
adam@1295 1 (* Copyright (c) 2009-2010, Adam Chlipala
adamc@885 2 * All rights reserved.
adamc@885 3 *
adamc@885 4 * Redistribution and use in source and binary forms, with or without
adamc@885 5 * modification, are permitted provided that the following conditions are met:
adamc@885 6 *
adamc@885 7 * - Redistributions of source code must retain the above copyright notice,
adamc@885 8 * this list of conditions and the following disclaimer.
adamc@885 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@885 10 * this list of conditions and the following disclaimer in the documentation
adamc@885 11 * and/or other materials provided with the distribution.
adamc@885 12 * - The names of contributors may not be used to endorse or promote products
adamc@885 13 * derived from this software without specific prior written permission.
adamc@885 14 *
adamc@885 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@885 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@885 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@885 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@885 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@885 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@885 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@885 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@885 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@885 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@885 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@885 26 *)
adamc@885 27
adamc@885 28 structure SQLite :> SQLITE = struct
adamc@885 29
adamc@885 30 open Settings
adamc@885 31 open Print.PD
adamc@885 32 open Print
adamc@885 33
adamc@885 34 fun p_sql_type t =
adamc@885 35 case t of
adamc@885 36 Int => "integer"
adamc@885 37 | Float => "real"
adamc@885 38 | String => "text"
adamc@1014 39 | Char => "text"
adamc@885 40 | Bool => "integer"
adamc@887 41 | Time => "text"
adamc@885 42 | Blob => "blob"
adamc@885 43 | Channel => "integer"
adamc@885 44 | Client => "integer"
adamc@885 45 | Nullable t => p_sql_type t
adamc@885 46
adamc@885 47 val ident = String.translate (fn #"'" => "PRIME"
adamc@885 48 | ch => str ch)
adamc@885 49
adamc@885 50 fun checkRel (table, checkNullable) (s, xts) =
adamc@885 51 let
adamc@885 52 val q = "SELECT COUNT(*) FROM sqlite_master WHERE type = '" ^ table ^ "' AND name = '"
adamc@885 53 ^ s ^ "'"
adamc@885 54 in
adamc@885 55 box [string "if (sqlite3_prepare_v2(conn->conn, \"",
adamc@885 56 string q,
adamc@885 57 string "\", -1, &stmt, NULL) != SQLITE_OK) {",
adamc@885 58 newline,
adamc@885 59 box [string "sqlite3_close(conn->conn);",
adamc@885 60 newline,
adamc@1266 61 string "uw_error(ctx, FATAL, \"Query preparation failed:<br />",
adamc@885 62 string q,
adamc@885 63 string "\");",
adamc@885 64 newline],
adamc@885 65 string "}",
adamc@885 66 newline,
adamc@885 67 newline,
adamc@885 68
adamc@885 69 string "while ((res = sqlite3_step(stmt)) == SQLITE_BUSY)",
adamc@885 70 newline,
adamc@885 71 box [string "sleep(1);",
adamc@885 72 newline],
adamc@885 73 newline,
adamc@885 74 string "if (res == SQLITE_DONE) {",
adamc@885 75 newline,
adamc@885 76 box [string "sqlite3_finalize(stmt);",
adamc@885 77 newline,
adamc@885 78 string "sqlite3_close(conn->conn);",
adamc@885 79 newline,
adamc@1266 80 string "uw_error(ctx, FATAL, \"No row returned:<br />",
adamc@885 81 string q,
adamc@885 82 string "\");",
adamc@885 83 newline],
adamc@885 84 string "}",
adamc@885 85 newline,
adamc@885 86 newline,
adamc@885 87 string "if (res != SQLITE_ROW) {",
adamc@885 88 newline,
adamc@885 89 box [string "sqlite3_finalize(stmt);",
adamc@885 90 newline,
adamc@885 91 string "sqlite3_close(conn->conn);",
adamc@885 92 newline,
adamc@1266 93 string "uw_error(ctx, FATAL, \"Error getting row:<br />",
adamc@885 94 string q,
adamc@885 95 string "\");",
adamc@885 96 newline],
adamc@885 97 string "}",
adamc@885 98 newline,
adamc@885 99 newline,
adamc@885 100
adamc@885 101 string "if (sqlite3_column_count(stmt) != 1) {",
adamc@885 102 newline,
adamc@885 103 box [string "sqlite3_finalize(stmt);",
adamc@885 104 newline,
adamc@885 105 string "sqlite3_close(conn->conn);",
adamc@885 106 newline,
adamc@1266 107 string "uw_error(ctx, FATAL, \"Bad column count:<br />",
adamc@885 108 string q,
adamc@885 109 string "\");",
adamc@885 110 newline],
adamc@885 111 string "}",
adamc@885 112 newline,
adamc@885 113 newline,
adamc@885 114
adamc@885 115 string "if (sqlite3_column_int(stmt, 0) != 1) {",
adamc@885 116 newline,
adamc@885 117 box [string "sqlite3_finalize(stmt);",
adamc@885 118 newline,
adamc@885 119 string "sqlite3_close(conn->conn);",
adamc@885 120 newline,
adamc@885 121 string "uw_error(ctx, FATAL, \"Table '",
adamc@885 122 string s,
adamc@885 123 string "' does not exist.\");",
adamc@885 124 newline],
adamc@885 125 string "}",
adamc@885 126 newline,
adamc@885 127 newline,
adamc@885 128 string "sqlite3_finalize(stmt);",
adamc@885 129 newline]
adamc@885 130 end
adamc@885 131
adamc@885 132 fun init {dbstring, prepared = ss, tables, views, sequences} =
adamc@885 133 let
adamc@885 134 val db = ref dbstring
adamc@885 135 in
adamc@885 136 app (fn s =>
adamc@885 137 case String.fields (fn ch => ch = #"=") s of
adamc@885 138 [name, value] =>
adamc@885 139 (case name of
adamc@885 140 "dbname" => db := value
adamc@885 141 | _ => ())
adamc@885 142 | _ => ()) (String.tokens Char.isSpace dbstring);
adamc@885 143
adamc@885 144 box [string "typedef struct {",
adamc@885 145 newline,
adamc@885 146 box [string "sqlite3 *conn;",
adamc@885 147 newline,
adamc@885 148 p_list_sepi (box [])
adamc@885 149 (fn i => fn _ =>
adamc@885 150 box [string "sqlite3_stmt *p",
adamc@885 151 string (Int.toString i),
adamc@885 152 string ";",
adamc@885 153 newline])
adamc@885 154 ss],
adamc@885 155 string "} uw_conn;",
adamc@885 156 newline,
adamc@885 157 newline,
adamc@885 158
adamc@1094 159 string "static void uw_client_init(void) {",
adamc@885 160 newline,
adamc@885 161 box [string "uw_sqlfmtInt = \"%lld%n\";",
adamc@885 162 newline,
adamc@885 163 string "uw_sqlfmtFloat = \"%g%n\";",
adamc@885 164 newline,
adamc@885 165 string "uw_Estrings = 0;",
adamc@885 166 newline,
adamc@885 167 string "uw_sqlsuffixString = \"\";",
adamc@885 168 newline,
adamc@1011 169 string "uw_sqlsuffixChar = \"\";",
adamc@1011 170 newline,
adamc@885 171 string "uw_sqlsuffixBlob = \"\";",
adamc@885 172 newline,
adamc@885 173 string "uw_sqlfmtUint4 = \"%u%n\";",
adamc@885 174 newline],
adamc@885 175 string "}",
adamc@885 176 newline,
adamc@885 177 newline,
adamc@885 178
adamc@885 179 if #persistent (currentProtocol ()) then
adamc@885 180 box [string "static void uw_db_validate(uw_context ctx) {",
adamc@885 181 newline,
adamc@885 182 string "uw_conn *conn = uw_get_db(ctx);",
adamc@885 183 newline,
adamc@885 184 string "sqlite3_stmt *stmt;",
adamc@885 185 newline,
adamc@885 186 string "int res;",
adamc@885 187 newline,
adamc@885 188 newline,
adamc@885 189 p_list_sep newline (checkRel ("table", true)) tables,
adamc@885 190 p_list_sep newline (fn name => checkRel ("table", true)
adamc@885 191 (name, [("id", Settings.Client)])) sequences,
adamc@885 192 p_list_sep newline (checkRel ("view", false)) views,
adamc@885 193 string "}",
adamc@885 194 newline,
adamc@885 195 newline,
adamc@885 196
adamc@885 197 string "static void uw_db_prepare(uw_context ctx) {",
adamc@885 198 newline,
adamc@885 199 string "uw_conn *conn = uw_get_db(ctx);",
adamc@885 200 newline,
adamc@885 201 newline,
adamc@885 202
adamc@885 203 p_list_sepi newline (fn i => fn (s, n) =>
adamc@885 204 let
adamc@885 205 fun uhoh this s args =
adamc@885 206 box [p_list_sepi (box [])
adamc@885 207 (fn j => fn () =>
adamc@885 208 box [string
adamc@885 209 "sqlite3_finalize(conn->p",
adamc@885 210 string (Int.toString j),
adamc@885 211 string ");",
adamc@885 212 newline])
adamc@885 213 (List.tabulate (i, fn _ => ())),
adamc@885 214 box (if this then
adamc@885 215 [string
adamc@885 216 "sqlite3_finalize(conn->p",
adamc@885 217 string (Int.toString i),
adamc@885 218 string ");",
adamc@885 219 newline]
adamc@885 220 else
adamc@885 221 []),
adamc@885 222 string "sqlite3_close(conn->conn);",
adamc@885 223 newline,
adamc@885 224 string "uw_error(ctx, FATAL, \"",
adamc@885 225 string s,
adamc@885 226 string "\"",
adamc@885 227 p_list_sep (box []) (fn s => box [string ", ",
adamc@885 228 string s]) args,
adamc@885 229 string ");",
adamc@885 230 newline]
adamc@885 231 in
adamc@885 232 box [string "if (sqlite3_prepare_v2(conn->conn, \"",
adam@1285 233 string (String.toCString s),
adamc@885 234 string "\", -1, &conn->p",
adamc@885 235 string (Int.toString i),
adamc@885 236 string ", NULL) != SQLITE_OK) {",
adamc@885 237 newline,
adamc@886 238 box [string "char msg[1024];",
adamc@886 239 newline,
adamc@886 240 string "strncpy(msg, sqlite3_errmsg(conn->conn), 1024);",
adamc@886 241 newline,
adamc@886 242 string "msg[1023] = 0;",
adamc@886 243 newline,
adamc@886 244 uhoh false ("Error preparing statement: "
adam@1285 245 ^ String.toCString s ^ "<br />%s") ["msg"]],
adamc@885 246 string "}",
adamc@885 247 newline]
adamc@885 248 end)
adamc@885 249 ss,
adamc@885 250
adamc@885 251 string "}"]
adamc@885 252 else
adamc@885 253 box [string "static void uw_db_prepare(uw_context ctx) { }",
adamc@885 254 newline,
adamc@885 255 string "static void uw_db_validate(uw_context ctx) { }"],
adamc@885 256 newline,
adamc@885 257 newline,
adamc@885 258
adamc@1094 259 string "static void uw_db_init(uw_context ctx) {",
adamc@885 260 newline,
adamc@885 261 string "sqlite3 *sqlite;",
adamc@885 262 newline,
adamc@1115 263 string "sqlite3_stmt *stmt;",
adamc@1115 264 newline,
adamc@885 265 string "uw_conn *conn;",
adamc@885 266 newline,
adamc@885 267 newline,
adamc@885 268 string "if (sqlite3_open(\"",
adamc@885 269 string (!db),
adamc@885 270 string "\", &sqlite) != SQLITE_OK) uw_error(ctx, FATAL, ",
adamc@885 271 string "\"Can't open SQLite database.\");",
adamc@885 272 newline,
adamc@885 273 newline,
adamc@1115 274 string "if (uw_database_max < SIZE_MAX) {",
adamc@1115 275 newline,
adamc@1115 276 box [string "char buf[100];",
adamc@1115 277 newline,
adamc@1115 278 newline,
adamc@1115 279
adamc@1115 280 string "sprintf(buf, \"PRAGMA max_page_count = %llu\", (unsigned long long)(uw_database_max / 1024));",
adamc@1115 281 newline,
adamc@1115 282 newline,
adamc@1115 283
adamc@1115 284 string "if (sqlite3_prepare_v2(sqlite, buf, -1, &stmt, NULL) != SQLITE_OK) {",
adamc@1115 285 newline,
adamc@1115 286 box [string "sqlite3_close(sqlite);",
adamc@1115 287 newline,
adamc@1115 288 string "uw_error(ctx, FATAL, \"Can't prepare max_page_count query for SQLite database\");",
adamc@1115 289 newline],
adamc@1115 290 string "}",
adamc@1115 291 newline,
adamc@1115 292 newline,
adamc@1115 293
adamc@1115 294 string "if (sqlite3_step(stmt) != SQLITE_ROW) {",
adamc@1115 295 newline,
adamc@1115 296 box [string "sqlite3_finalize(stmt);",
adamc@1115 297 newline,
adamc@1115 298 string "sqlite3_close(sqlite);",
adamc@1115 299 newline,
adamc@1115 300 string "uw_error(ctx, FATAL, \"Can't set max_page_count parameter for SQLite database\");",
adamc@1115 301 newline],
adamc@1115 302 string "}",
adamc@1115 303 newline,
adamc@1115 304 newline,
adamc@1115 305
adamc@1115 306 string "sqlite3_finalize(stmt);",
adamc@1115 307 newline],
adamc@1115 308 string "}",
adamc@1115 309 newline,
adamc@1115 310 newline,
adamc@1115 311
adamc@885 312 string "conn = calloc(1, sizeof(uw_conn));",
adamc@885 313 newline,
adamc@885 314 string "conn->conn = sqlite;",
adamc@885 315 newline,
adamc@885 316 string "uw_set_db(ctx, conn);",
adamc@885 317 newline,
adamc@885 318 string "uw_db_validate(ctx);",
adamc@885 319 newline,
adamc@885 320 string "uw_db_prepare(ctx);",
adamc@885 321 newline,
adamc@885 322 string "}",
adamc@885 323 newline,
adamc@885 324 newline,
adamc@885 325
adamc@1094 326 string "static void uw_db_close(uw_context ctx) {",
adamc@885 327 newline,
adamc@885 328 string "uw_conn *conn = uw_get_db(ctx);",
adamc@885 329 newline,
adamc@885 330 p_list_sepi (box [])
adamc@885 331 (fn i => fn _ =>
adamc@885 332 box [string "if (conn->p",
adamc@885 333 string (Int.toString i),
adamc@885 334 string ") sqlite3_finalize(conn->p",
adamc@885 335 string (Int.toString i),
adamc@885 336 string ");",
adamc@885 337 newline])
adamc@885 338 ss,
adamc@885 339 string "sqlite3_close(conn->conn);",
adamc@885 340 newline,
adamc@885 341 string "}",
adamc@885 342 newline,
adamc@885 343 newline,
adamc@885 344
adamc@1094 345 string "static int uw_db_begin(uw_context ctx) {",
adamc@885 346 newline,
adamc@885 347 string "uw_conn *conn = uw_get_db(ctx);",
adamc@885 348 newline,
adamc@885 349 newline,
adamc@885 350 string "if (sqlite3_exec(conn->conn, \"BEGIN\", NULL, NULL, NULL) == SQLITE_OK)",
adamc@885 351 newline,
adamc@885 352 box [string "return 0;",
adamc@885 353 newline],
adamc@885 354 string "else {",
adamc@885 355 newline,
adamc@1266 356 box [string "fprintf(stderr, \"Begin error: %s<br />\", sqlite3_errmsg(conn->conn));",
adamc@885 357 newline,
adamc@885 358 string "return 1;",
adamc@885 359 newline],
adamc@885 360 string "}",
adamc@885 361 newline,
adamc@885 362 string "}",
adamc@885 363 newline,
adamc@1094 364 string "static int uw_db_commit(uw_context ctx) {",
adamc@885 365 newline,
adamc@885 366 string "uw_conn *conn = uw_get_db(ctx);",
adamc@885 367 newline,
adamc@885 368 string "if (sqlite3_exec(conn->conn, \"COMMIT\", NULL, NULL, NULL) == SQLITE_OK)",
adamc@885 369 newline,
adamc@885 370 box [string "return 0;",
adamc@885 371 newline],
adamc@885 372 string "else {",
adamc@885 373 newline,
adamc@1266 374 box [string "fprintf(stderr, \"Commit error: %s<br />\", sqlite3_errmsg(conn->conn));",
adamc@885 375 newline,
adamc@885 376 string "return 1;",
adamc@885 377 newline],
adamc@885 378 string "}",
adamc@885 379 newline,
adamc@885 380 string "}",
adamc@885 381 newline,
adamc@885 382 newline,
adamc@885 383
adamc@1094 384 string "static int uw_db_rollback(uw_context ctx) {",
adamc@885 385 newline,
adamc@885 386 string "uw_conn *conn = uw_get_db(ctx);",
adamc@885 387 newline,
adamc@885 388 string "if (sqlite3_exec(conn->conn, \"ROLLBACK\", NULL, NULL, NULL) == SQLITE_OK)",
adamc@885 389 newline,
adamc@885 390 box [string "return 0;",
adamc@885 391 newline],
adamc@885 392 string "else {",
adamc@885 393 newline,
adamc@1266 394 box [string "fprintf(stderr, \"Rollback error: %s<br />\", sqlite3_errmsg(conn->conn));",
adamc@885 395 newline,
adamc@885 396 string "return 1;",
adamc@885 397 newline],
adamc@885 398 string "}",
adamc@885 399 newline,
adamc@885 400 string "}",
adamc@885 401 newline,
adamc@885 402 newline]
adamc@885 403 end
adamc@885 404
adamc@885 405 fun p_getcol {loc, wontLeakStrings, col = i, typ = t} =
adamc@885 406 let
adamc@885 407 fun p_unsql t =
adamc@885 408 case t of
adamc@885 409 Int => box [string "sqlite3_column_int64(stmt, ", string (Int.toString i), string ")"]
adamc@885 410 | Float => box [string "sqlite3_column_double(stmt, ", string (Int.toString i), string ")"]
adamc@885 411 | String =>
adamc@885 412 if wontLeakStrings then
adamc@1014 413 box [string "(uw_Basis_string)sqlite3_column_text(stmt, ", string (Int.toString i), string ")"]
adamc@885 414 else
adamc@1014 415 box [string "uw_strdup(ctx, (uw_Basis_string)sqlite3_column_text(stmt, ", string (Int.toString i), string "))"]
adamc@1014 416 | Char => box [string "sqlite3_column_text(stmt, ", string (Int.toString i), string ")[0]"]
adamc@885 417 | Bool => box [string "(uw_Basis_bool)sqlite3_column_int(stmt, ", string (Int.toString i), string ")"]
adamc@1014 418 | Time => box [string "uw_Basis_stringToTime_error(ctx, (uw_Basis_string)sqlite3_column_text(stmt, ", string (Int.toString i), string "))"]
adamc@885 419 | Blob => box [string "({",
adamc@885 420 newline,
adamc@890 421 string "char *data = (char *)sqlite3_column_blob(stmt, ",
adamc@885 422 string (Int.toString i),
adamc@885 423 string ");",
adamc@885 424 newline,
adamc@890 425 string "int len = sqlite3_column_bytes(stmt, ",
adamc@885 426 string (Int.toString i),
adamc@890 427 string ");",
adamc@890 428 newline,
adamc@890 429 string "uw_Basis_blob b = {len, uw_memdup(ctx, data, len)};",
adamc@885 430 newline,
adamc@885 431 string "b;",
adamc@885 432 newline,
adamc@885 433 string "})"]
adamc@886 434 | Channel => box [string "({",
adamc@886 435 newline,
adamc@886 436 string "sqlite3_int64 n = sqlite3_column_int64(stmt, ",
adamc@886 437 string (Int.toString i),
adamc@886 438 string ");",
adamc@886 439 newline,
adamc@886 440 string "uw_Basis_channel ch = {n >> 32, n & 0xFFFFFFFF};",
adamc@886 441 newline,
adamc@886 442 string "ch;",
adamc@886 443 newline,
adamc@886 444 string "})"]
adamc@885 445 | Client => box [string "sqlite3_column_int(stmt, ", string (Int.toString i), string ")"]
adamc@885 446
adamc@885 447 | Nullable _ => raise Fail "Postgres: Recursive Nullable"
adamc@885 448
adamc@885 449 fun getter t =
adamc@885 450 case t of
adamc@885 451 Nullable t =>
adamc@885 452 box [string "(sqlite3_column_type(stmt, ",
adamc@885 453 string (Int.toString i),
adamc@885 454 string ") == SQLITE_NULL ? NULL : ",
adamc@885 455 case t of
adamc@885 456 String => getter t
adamc@885 457 | _ => box [string "({",
adamc@885 458 newline,
adamc@885 459 string (p_sql_ctype t),
adamc@885 460 space,
adamc@885 461 string "*tmp = uw_malloc(ctx, sizeof(",
adamc@885 462 string (p_sql_ctype t),
adamc@885 463 string "));",
adamc@885 464 newline,
adamc@885 465 string "*tmp = ",
adamc@885 466 getter t,
adamc@885 467 string ";",
adamc@885 468 newline,
adamc@885 469 string "tmp;",
adamc@885 470 newline,
adamc@885 471 string "})"],
adamc@885 472 string ")"]
adamc@885 473 | _ =>
adamc@885 474 box [string "(sqlite3_column_type(stmt, ",
adamc@885 475 string (Int.toString i),
adamc@885 476 string ") == SQLITE_NULL ? ",
adamc@885 477 box [string "({",
adamc@885 478 string (p_sql_ctype t),
adamc@885 479 space,
adamc@885 480 string "tmp;",
adamc@885 481 newline,
adamc@885 482 string "uw_error(ctx, FATAL, \"",
adamc@885 483 string (ErrorMsg.spanToString loc),
adamc@885 484 string ": Unexpectedly NULL field #",
adamc@885 485 string (Int.toString i),
adamc@885 486 string "\");",
adamc@885 487 newline,
adamc@885 488 string "tmp;",
adamc@885 489 newline,
adamc@885 490 string "})"],
adamc@885 491 string " : ",
adamc@885 492 p_unsql t,
adamc@885 493 string ")"]
adamc@885 494 in
adamc@885 495 getter t
adamc@885 496 end
adamc@885 497
adamc@885 498 fun queryCommon {loc, query, cols, doCols} =
adamc@885 499 box [string "int r;",
adamc@885 500 newline,
adamc@885 501
adamc@885 502 string "sqlite3_reset(stmt);",
adamc@885 503 newline,
adamc@885 504
adamc@885 505 string "uw_end_region(ctx);",
adamc@885 506 newline,
adamc@885 507 string "while ((r = sqlite3_step(stmt)) == SQLITE_ROW) {",
adamc@885 508 newline,
adamc@885 509 doCols p_getcol,
adamc@885 510 string "}",
adamc@885 511 newline,
adamc@885 512 newline,
adamc@885 513
adamc@885 514 string "if (r == SQLITE_BUSY) {",
adamc@885 515 box [string "sleep(1);",
adamc@885 516 newline,
adamc@885 517 string "uw_error(ctx, UNLIMITED_RETRY, \"Database is busy\");",
adamc@885 518 newline],
adamc@885 519 string "}",
adamc@885 520 newline,
adamc@885 521 newline,
adamc@885 522
adamc@885 523 string "if (r != SQLITE_DONE) uw_error(ctx, FATAL, \"",
adamc@885 524 string (ErrorMsg.spanToString loc),
adamc@1266 525 string ": query step failed: %s<br />%s\", ",
adamc@885 526 query,
adamc@885 527 string ", sqlite3_errmsg(conn->conn));",
adamc@885 528 newline,
adamc@885 529 newline]
adamc@885 530
adamc@885 531 fun query {loc, cols, doCols} =
adamc@885 532 box [string "uw_conn *conn = uw_get_db(ctx);",
adamc@885 533 newline,
adamc@886 534 string "sqlite3_stmt *stmt;",
adamc@885 535 newline,
adamc@885 536 newline,
adamc@1266 537 string "if (sqlite3_prepare_v2(conn->conn, query, -1, &stmt, NULL) != SQLITE_OK) uw_error(ctx, FATAL, \"Error preparing statement: %s<br />%s\", sqlite3_errmsg(conn->conn), query);",
adamc@885 538 newline,
adamc@885 539 newline,
adamc@885 540 string "uw_push_cleanup(ctx, (void (*)(void *))sqlite3_finalize, stmt);",
adamc@885 541 newline,
adamc@885 542 newline,
adamc@885 543
adamc@885 544 queryCommon {loc = loc, cols = cols, doCols = doCols, query = string "query"},
adamc@885 545
adamc@885 546 string "uw_pop_cleanup(ctx);",
adamc@885 547 newline]
adamc@885 548
adamc@1014 549 val p_pre_inputs =
adamc@1014 550 p_list_sepi (box [])
adamc@1014 551 (fn i => fn t =>
adamc@1014 552 case t of
adamc@1014 553 Char => box [string "char arg",
adamc@1014 554 string (Int.toString (i + 1)),
adamc@1014 555 string "s = {arg",
adamc@1014 556 string (Int.toString (i + 1)),
adamc@1014 557 string ", 0};",
adamc@1014 558 newline]
adamc@1014 559 | _ => box [])
adamc@1014 560
adamc@885 561 fun p_inputs loc =
adamc@885 562 p_list_sepi (box [])
adamc@885 563 (fn i => fn t =>
adamc@885 564 let
adamc@885 565 fun bind (t, arg) =
adamc@885 566 case t of
adamc@885 567 Int => box [string "sqlite3_bind_int64(stmt, ",
adamc@885 568 string (Int.toString (i + 1)),
adamc@885 569 string ", ",
adamc@885 570 arg,
adamc@885 571 string ")"]
adamc@885 572 | Float => box [string "sqlite3_bind_double(stmt, ",
adamc@885 573 string (Int.toString (i + 1)),
adamc@885 574 string ", ",
adamc@885 575 arg,
adamc@1014 576 string ")"]
adamc@885 577 | String => box [string "sqlite3_bind_text(stmt, ",
adamc@885 578 string (Int.toString (i + 1)),
adamc@885 579 string ", ",
adamc@885 580 arg,
adamc@885 581 string ", -1, SQLITE_TRANSIENT)"]
adamc@1014 582 | Char => box [string "sqlite3_bind_text(stmt, ",
adamc@1014 583 string (Int.toString (i + 1)),
adamc@1014 584 string ", ",
adamc@1014 585 arg,
adamc@1014 586 string "s, -1, SQLITE_TRANSIENT)"]
adamc@885 587 | Bool => box [string "sqlite3_bind_int(stmt, ",
adamc@885 588 string (Int.toString (i + 1)),
adamc@885 589 string ", ",
adamc@885 590 arg,
adamc@885 591 string ")"]
adamc@887 592 | Time => box [string "sqlite3_bind_text(stmt, ",
adamc@885 593 string (Int.toString (i + 1)),
adamc@887 594 string ", uw_Basis_attrifyTime(ctx, ",
adamc@885 595 arg,
adamc@887 596 string "), -1, SQLITE_TRANSIENT)"]
adamc@885 597 | Blob => box [string "sqlite3_bind_blob(stmt, ",
adamc@885 598 string (Int.toString (i + 1)),
adamc@885 599 string ", ",
adamc@885 600 arg,
adamc@885 601 string ".data, ",
adamc@885 602 arg,
adamc@890 603 string ".size, SQLITE_TRANSIENT)"]
adamc@886 604 | Channel => box [string "sqlite3_bind_int64(stmt, ",
adamc@885 605 string (Int.toString (i + 1)),
adamc@886 606 string ", ((sqlite3_int64)",
adamc@885 607 arg,
adamc@886 608 string ".cli << 32) | ",
adamc@886 609 arg,
adamc@886 610 string ".chn)"]
adamc@885 611 | Client => box [string "sqlite3_bind_int(stmt, ",
adamc@885 612 string (Int.toString (i + 1)),
adamc@885 613 string ", ",
adamc@885 614 arg,
adamc@885 615 string ")"]
adamc@885 616 | Nullable t => box [string "(",
adamc@885 617 arg,
adamc@885 618 string " == NULL ? sqlite3_bind_null(stmt, ",
adamc@885 619 string (Int.toString (i + 1)),
adamc@885 620 string ") : ",
adamc@885 621 bind (t, case t of
adamc@885 622 String => arg
adamc@885 623 | _ => box [string "(*", arg, string ")"]),
adamc@885 624 string ")"]
adamc@885 625 in
adamc@885 626 box [string "if (",
adamc@885 627 bind (t, box [string "arg", string (Int.toString (i + 1))]),
adamc@885 628 string " != SQLITE_OK) uw_error(ctx, FATAL, \"",
adamc@885 629 string (ErrorMsg.spanToString loc),
adamc@885 630 string ": Error binding parameter #",
adamc@885 631 string (Int.toString (i + 1)),
adamc@885 632 string ": %s\", sqlite3_errmsg(conn->conn));",
adamc@885 633 newline]
adamc@885 634 end)
adamc@885 635
adamc@885 636 fun queryPrepared {loc, id, query, inputs, cols, doCols, nested} =
adamc@885 637 box [string "uw_conn *conn = uw_get_db(ctx);",
adamc@885 638 newline,
adamc@1014 639 p_pre_inputs inputs,
adamc@885 640 if nested then
adamc@885 641 box [string "sqlite3_stmt *stmt;",
adamc@885 642 newline]
adamc@885 643 else
adamc@885 644 box [string "sqlite3_stmt *stmt = conn->p",
adamc@885 645 string (Int.toString id),
adamc@885 646 string ";",
adamc@885 647 newline,
adamc@885 648 newline,
adamc@885 649
adamc@885 650 string "if (stmt == NULL) {",
adamc@885 651 newline],
adamc@885 652
adamc@885 653 string "if (sqlite3_prepare_v2(conn->conn, \"",
adam@1285 654 string (String.toCString query),
adamc@885 655 string "\", -1, &stmt, NULL) != SQLITE_OK) uw_error(ctx, FATAL, \"Error preparing statement: ",
adam@1285 656 string (String.toCString query),
adamc@1266 657 string "<br />%s\", sqlite3_errmsg(conn->conn));",
adamc@885 658 newline,
adamc@885 659 if nested then
adamc@885 660 box [string "uw_push_cleanup(ctx, (void (*)(void *))sqlite3_finalize, stmt);",
adamc@885 661 newline]
adamc@885 662 else
adamc@885 663 box [string "conn->p",
adamc@885 664 string (Int.toString id),
adamc@885 665 string " = stmt;",
adamc@885 666 newline,
adamc@885 667 string "}",
adamc@885 668 newline,
adamc@885 669 newline,
adamc@885 670 string "uw_push_cleanup(ctx, (void (*)(void *))sqlite3_clear_bindings, stmt);",
adamc@885 671 newline,
adamc@885 672 string "uw_push_cleanup(ctx, (void (*)(void *))sqlite3_reset, stmt);",
adamc@885 673 newline],
adamc@885 674 newline,
adamc@885 675
adamc@885 676 p_inputs loc inputs,
adamc@885 677 newline,
adamc@885 678
adamc@885 679 queryCommon {loc = loc, cols = cols, doCols = doCols, query = box [string "\"",
adam@1285 680 string (String.toCString query),
adamc@885 681 string "\""]},
adamc@885 682
adamc@885 683 string "uw_pop_cleanup(ctx);",
adamc@885 684 newline,
adamc@885 685 if nested then
adamc@885 686 box []
adamc@885 687 else
adamc@885 688 box [string "uw_pop_cleanup(ctx);",
adamc@885 689 newline]]
adamc@885 690
adam@1293 691 fun dmlCommon {loc, dml, mode} =
adamc@885 692 box [string "int r;",
adamc@885 693 newline,
adamc@885 694
adamc@885 695 string "if ((r = sqlite3_step(stmt)) == SQLITE_BUSY) {",
adamc@885 696 box [string "sleep(1);",
adamc@885 697 newline,
adamc@885 698 string "uw_error(ctx, UNLIMITED_RETRY, \"Database is busy\");",
adamc@885 699 newline],
adamc@885 700 string "}",
adamc@885 701 newline,
adamc@885 702 newline,
adamc@885 703
adam@1293 704 string "if (r != SQLITE_DONE) ",
adam@1293 705 case mode of
adam@1293 706 Settings.Error => box [string "uw_error(ctx, FATAL, \"",
adam@1293 707 string (ErrorMsg.spanToString loc),
adam@1293 708 string ": DML step failed: %s<br />%s\", ",
adam@1293 709 dml,
adam@1293 710 string ", sqlite3_errmsg(conn->conn));"]
adam@1295 711 | Settings.None => string "uw_set_error_message(ctx, sqlite3_errmsg(conn->conn));",
adamc@885 712 newline]
adamc@885 713
adam@1293 714 fun dml (loc, mode) =
adamc@885 715 box [string "uw_conn *conn = uw_get_db(ctx);",
adamc@885 716 newline,
adamc@886 717 string "sqlite3_stmt *stmt;",
adamc@885 718 newline,
adamc@885 719 newline,
adamc@1266 720 string "if (sqlite3_prepare_v2(conn->conn, dml, -1, &stmt, NULL) != SQLITE_OK) uw_error(ctx, FATAL, \"Error preparing statement: %s<br />%s\", dml, sqlite3_errmsg(conn->conn));",
adamc@885 721 newline,
adamc@885 722 newline,
adamc@885 723 string "uw_push_cleanup(ctx, (void (*)(void *))sqlite3_finalize, stmt);",
adamc@885 724 newline,
adamc@885 725 newline,
adamc@885 726
adam@1293 727 dmlCommon {loc = loc, dml = string "dml", mode = mode},
adamc@885 728
adamc@885 729 string "uw_pop_cleanup(ctx);",
adamc@885 730 newline]
adamc@885 731
adam@1293 732 fun dmlPrepared {loc, id, dml, inputs, mode = mode} =
adamc@885 733 box [string "uw_conn *conn = uw_get_db(ctx);",
adamc@885 734 newline,
adamc@1014 735 p_pre_inputs inputs,
adamc@885 736 string "sqlite3_stmt *stmt = conn->p",
adamc@885 737 string (Int.toString id),
adamc@885 738 string ";",
adamc@885 739 newline,
adamc@885 740 newline,
adamc@885 741
adamc@885 742 string "if (stmt == NULL) {",
adamc@885 743 newline,
adamc@885 744 box [string "if (sqlite3_prepare_v2(conn->conn, \"",
adam@1285 745 string (String.toCString dml),
adamc@885 746 string "\", -1, &stmt, NULL) != SQLITE_OK) uw_error(ctx, FATAL, \"Error preparing statement: ",
adam@1285 747 string (String.toCString dml),
adamc@1266 748 string "<br />%s\", sqlite3_errmsg(conn->conn));",
adamc@885 749 newline,
adamc@885 750 string "conn->p",
adamc@885 751 string (Int.toString id),
adamc@885 752 string " = stmt;",
adamc@885 753 newline],
adamc@885 754 string "}",
adamc@885 755 newline,
adamc@885 756
adamc@885 757 string "uw_push_cleanup(ctx, (void (*)(void *))sqlite3_clear_bindings, stmt);",
adamc@885 758 newline,
adamc@885 759 string "uw_push_cleanup(ctx, (void (*)(void *))sqlite3_reset, stmt);",
adamc@885 760 newline,
adamc@885 761
adamc@885 762 p_inputs loc inputs,
adamc@885 763 newline,
adamc@885 764
adamc@885 765 dmlCommon {loc = loc, dml = box [string "\"",
adam@1285 766 string (String.toCString dml),
adam@1293 767 string "\""], mode = mode},
adamc@885 768
adamc@885 769 string "uw_pop_cleanup(ctx);",
adamc@885 770 newline,
adamc@885 771 string "uw_pop_cleanup(ctx);",
adamc@885 772 newline]
adamc@885 773
adamc@885 774 fun nextval {loc, seqE, seqName} =
adamc@885 775 box [string "uw_conn *conn = uw_get_db(ctx);",
adamc@885 776 newline,
adamc@885 777 string "char *insert = ",
adamc@885 778 case seqName of
adamc@886 779 SOME s => string ("\"INSERT INTO " ^ s ^ " VALUES (NULL)\"")
adamc@885 780 | NONE => box [string "uw_Basis_strcat(ctx, \"INSERT INTO \", uw_Basis_strcat(ctx, ",
adamc@885 781 seqE,
adamc@885 782 string ", \" VALUES ()\"))"],
adamc@885 783 string ";",
adamc@885 784 newline,
adamc@885 785 string "char *delete = ",
adamc@885 786 case seqName of
adamc@885 787 SOME s => string ("\"DELETE FROM " ^ s ^ "\"")
adamc@885 788 | NONE => box [string "uw_Basis_strcat(ctx, \"DELETE FROM \", ",
adamc@885 789 seqE,
adamc@885 790 string ")"],
adamc@885 791 string ";",
adamc@885 792 newline,
adamc@885 793 newline,
adamc@885 794
adamc@886 795 string "if (sqlite3_exec(conn->conn, insert, NULL, NULL, NULL) != SQLITE_OK) uw_error(ctx, FATAL, \"'nextval' INSERT failed: %s\", sqlite3_errmsg(conn->conn));",
adamc@885 796 newline,
adamc@885 797 string "n = sqlite3_last_insert_rowid(conn->conn);",
adamc@885 798 newline,
adamc@886 799 string "if (sqlite3_exec(conn->conn, delete, NULL, NULL, NULL) != SQLITE_OK) uw_error(ctx, FATAL, \"'nextval' DELETE failed: %s\", sqlite3_errmsg(conn->conn));",
adamc@885 800 newline]
adamc@885 801
adamc@885 802 fun nextvalPrepared _ = raise Fail "SQLite.nextvalPrepared called"
adamc@1073 803 fun setval _ = raise Fail "SQLite.setval called"
adamc@885 804
adamc@885 805 fun sqlifyString s = "'" ^ String.translate (fn #"'" => "''"
adam@1285 806 | #"\000" => ""
adam@1285 807 | ch => str ch)
adam@1285 808 s ^ "'"
adamc@885 809
adamc@885 810 fun p_cast (s, _) = s
adamc@885 811
adamc@885 812 fun p_blank _ = "?"
adamc@885 813
adamc@885 814 val () = addDbms {name = "sqlite",
adamc@885 815 header = "sqlite3.h",
adamc@885 816 link = "-lsqlite3",
adamc@885 817 init = init,
adamc@885 818 p_sql_type = p_sql_type,
adamc@885 819 query = query,
adamc@885 820 queryPrepared = queryPrepared,
adamc@885 821 dml = dml,
adamc@885 822 dmlPrepared = dmlPrepared,
adamc@885 823 nextval = nextval,
adamc@885 824 nextvalPrepared = nextvalPrepared,
adamc@1073 825 setval = setval,
adamc@885 826 sqlifyString = sqlifyString,
adamc@885 827 p_cast = p_cast,
adamc@885 828 p_blank = p_blank,
adamc@885 829 supportsDeleteAs = false,
adamc@886 830 supportsUpdateAs = false,
adamc@886 831 createSequence = fn s => "CREATE TABLE " ^ s ^ " (id INTEGER PRIMARY KEY AUTOINCREMENT)",
adamc@885 832 textKeysNeedLengths = false,
adamc@885 833 supportsNextval = false,
adamc@885 834 supportsNestedPrepared = false,
adamc@890 835 sqlPrefix = "",
adamc@1014 836 supportsOctetLength = false,
adamc@1014 837 trueString = "1",
adamc@1196 838 falseString = "0",
adamc@1196 839 onlyUnion = false,
adamc@1196 840 nestedRelops = false}
adamc@885 841
adamc@885 842 end