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annotate src/postgres.sml @ 872:9654bce27cff

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author Adam Chlipala <adamc@hcoop.net>
date Tue, 30 Jun 2009 16:17:32 -0400
parents 3ae6b655ced0
children 41971801b62d
rev   line source
adamc@866 1 (* Copyright (c) 2008-2009, Adam Chlipala
adamc@866 2 * All rights reserved.
adamc@866 3 *
adamc@866 4 * Redistribution and use in source and binary forms, with or without
adamc@866 5 * modification, are permitted provided that the following conditions are met:
adamc@866 6 *
adamc@866 7 * - Redistributions of source code must retain the above copyright notice,
adamc@866 8 * this list of conditions and the following disclaimer.
adamc@866 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@866 10 * this list of conditions and the following disclaimer in the documentation
adamc@866 11 * and/or other materials provided with the distribution.
adamc@866 12 * - The names of contributors may not be used to endorse or promote products
adamc@866 13 * derived from this software without specific prior written permission.
adamc@866 14 *
adamc@866 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@866 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@866 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@866 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@866 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@866 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@866 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@866 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@866 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@866 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@866 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@866 26 *)
adamc@866 27
adamc@866 28 structure Postgres :> POSTGRES = struct
adamc@866 29
adamc@866 30 open Settings
adamc@866 31 open Print.PD
adamc@866 32 open Print
adamc@866 33
adamc@870 34 val ident = String.translate (fn #"'" => "PRIME"
adamc@870 35 | ch => str ch)
adamc@870 36
adamc@870 37 fun p_sql_type_base t =
adamc@870 38 case t of
adamc@871 39 Int => "bigint"
adamc@871 40 | Float => "double precision"
adamc@870 41 | String => "text"
adamc@871 42 | Bool => "boolean"
adamc@871 43 | Time => "timestamp without time zone"
adamc@870 44 | Blob => "bytea"
adamc@871 45 | Channel => "bigint"
adamc@871 46 | Client => "integer"
adamc@870 47 | Nullable t => p_sql_type_base t
adamc@870 48
adamc@872 49 fun checkRel (table, checkNullable) (s, xts) =
adamc@871 50 let
adamc@871 51 val sl = CharVector.map Char.toLower s
adamc@871 52
adamc@872 53 val q = "SELECT COUNT(*) FROM information_schema." ^ table ^ " WHERE table_name = '"
adamc@871 54 ^ sl ^ "'"
adamc@871 55
adamc@871 56 val q' = String.concat ["SELECT COUNT(*) FROM information_schema.columns WHERE table_name = '",
adamc@871 57 sl,
adamc@871 58 "' AND (",
adamc@871 59 String.concatWith " OR "
adamc@871 60 (map (fn (x, t) =>
adamc@871 61 String.concat ["(column_name = 'uw_",
adamc@871 62 CharVector.map
adamc@871 63 Char.toLower (ident x),
adamc@871 64 "' AND data_type = '",
adamc@871 65 p_sql_type_base t,
adamc@872 66 "'",
adamc@872 67 if checkNullable then
adamc@872 68 (" AND is_nullable = '"
adamc@872 69 ^ (if isNotNull t then
adamc@872 70 "NO"
adamc@872 71 else
adamc@872 72 "YES")
adamc@872 73 ^ "'")
adamc@871 74 else
adamc@872 75 "",
adamc@872 76 ")"]) xts),
adamc@871 77 ")"]
adamc@871 78
adamc@871 79 val q'' = String.concat ["SELECT COUNT(*) FROM information_schema.columns WHERE table_name = '",
adamc@871 80 sl,
adamc@871 81 "' AND column_name LIKE 'uw_%'"]
adamc@871 82 in
adamc@871 83 box [string "res = PQexec(conn, \"",
adamc@871 84 string q,
adamc@871 85 string "\");",
adamc@871 86 newline,
adamc@871 87 newline,
adamc@871 88 string "if (res == NULL) {",
adamc@871 89 newline,
adamc@871 90 box [string "PQfinish(conn);",
adamc@871 91 newline,
adamc@871 92 string "uw_error(ctx, FATAL, \"Out of memory allocating query result.\");",
adamc@871 93 newline],
adamc@871 94 string "}",
adamc@871 95 newline,
adamc@871 96 newline,
adamc@871 97 string "if (PQresultStatus(res) != PGRES_TUPLES_OK) {",
adamc@871 98 newline,
adamc@871 99 box [string "char msg[1024];",
adamc@871 100 newline,
adamc@871 101 string "strncpy(msg, PQerrorMessage(conn), 1024);",
adamc@871 102 newline,
adamc@871 103 string "msg[1023] = 0;",
adamc@871 104 newline,
adamc@871 105 string "PQclear(res);",
adamc@871 106 newline,
adamc@871 107 string "PQfinish(conn);",
adamc@871 108 newline,
adamc@871 109 string "uw_error(ctx, FATAL, \"Query failed:\\n",
adamc@871 110 string q,
adamc@871 111 string "\\n%s\", msg);",
adamc@871 112 newline],
adamc@871 113 string "}",
adamc@871 114 newline,
adamc@871 115 newline,
adamc@871 116 string "if (strcmp(PQgetvalue(res, 0, 0), \"1\")) {",
adamc@871 117 newline,
adamc@871 118 box [string "PQclear(res);",
adamc@871 119 newline,
adamc@871 120 string "PQfinish(conn);",
adamc@871 121 newline,
adamc@871 122 string "uw_error(ctx, FATAL, \"Table '",
adamc@871 123 string s,
adamc@871 124 string "' does not exist.\");",
adamc@871 125 newline],
adamc@871 126 string "}",
adamc@871 127 newline,
adamc@871 128 newline,
adamc@871 129 string "PQclear(res);",
adamc@871 130 newline,
adamc@871 131
adamc@871 132 string "res = PQexec(conn, \"",
adamc@871 133 string q',
adamc@871 134 string "\");",
adamc@871 135 newline,
adamc@871 136 newline,
adamc@871 137 string "if (res == NULL) {",
adamc@871 138 newline,
adamc@871 139 box [string "PQfinish(conn);",
adamc@871 140 newline,
adamc@871 141 string "uw_error(ctx, FATAL, \"Out of memory allocating query result.\");",
adamc@871 142 newline],
adamc@871 143 string "}",
adamc@871 144 newline,
adamc@871 145 newline,
adamc@871 146 string "if (PQresultStatus(res) != PGRES_TUPLES_OK) {",
adamc@871 147 newline,
adamc@871 148 box [string "char msg[1024];",
adamc@871 149 newline,
adamc@871 150 string "strncpy(msg, PQerrorMessage(conn), 1024);",
adamc@871 151 newline,
adamc@871 152 string "msg[1023] = 0;",
adamc@871 153 newline,
adamc@871 154 string "PQclear(res);",
adamc@871 155 newline,
adamc@871 156 string "PQfinish(conn);",
adamc@871 157 newline,
adamc@871 158 string "uw_error(ctx, FATAL, \"Query failed:\\n",
adamc@871 159 string q',
adamc@871 160 string "\\n%s\", msg);",
adamc@871 161 newline],
adamc@871 162 string "}",
adamc@871 163 newline,
adamc@871 164 newline,
adamc@871 165 string "if (strcmp(PQgetvalue(res, 0, 0), \"",
adamc@871 166 string (Int.toString (length xts)),
adamc@871 167 string "\")) {",
adamc@871 168 newline,
adamc@871 169 box [string "PQclear(res);",
adamc@871 170 newline,
adamc@871 171 string "PQfinish(conn);",
adamc@871 172 newline,
adamc@871 173 string "uw_error(ctx, FATAL, \"Table '",
adamc@871 174 string s,
adamc@871 175 string "' has the wrong column types.\");",
adamc@871 176 newline],
adamc@871 177 string "}",
adamc@871 178 newline,
adamc@871 179 newline,
adamc@871 180 string "PQclear(res);",
adamc@871 181 newline,
adamc@871 182 newline,
adamc@871 183
adamc@871 184 string "res = PQexec(conn, \"",
adamc@871 185 string q'',
adamc@871 186 string "\");",
adamc@871 187 newline,
adamc@871 188 newline,
adamc@871 189 string "if (res == NULL) {",
adamc@871 190 newline,
adamc@871 191 box [string "PQfinish(conn);",
adamc@871 192 newline,
adamc@871 193 string "uw_error(ctx, FATAL, \"Out of memory allocating query result.\");",
adamc@871 194 newline],
adamc@871 195 string "}",
adamc@871 196 newline,
adamc@871 197 newline,
adamc@871 198 string "if (PQresultStatus(res) != PGRES_TUPLES_OK) {",
adamc@871 199 newline,
adamc@871 200 box [string "char msg[1024];",
adamc@871 201 newline,
adamc@871 202 string "strncpy(msg, PQerrorMessage(conn), 1024);",
adamc@871 203 newline,
adamc@871 204 string "msg[1023] = 0;",
adamc@871 205 newline,
adamc@871 206 string "PQclear(res);",
adamc@871 207 newline,
adamc@871 208 string "PQfinish(conn);",
adamc@871 209 newline,
adamc@871 210 string "uw_error(ctx, FATAL, \"Query failed:\\n",
adamc@871 211 string q'',
adamc@871 212 string "\\n%s\", msg);",
adamc@871 213 newline],
adamc@871 214 string "}",
adamc@871 215 newline,
adamc@871 216 newline,
adamc@871 217 string "if (strcmp(PQgetvalue(res, 0, 0), \"",
adamc@871 218 string (Int.toString (length xts)),
adamc@871 219 string "\")) {",
adamc@871 220 newline,
adamc@871 221 box [string "PQclear(res);",
adamc@871 222 newline,
adamc@871 223 string "PQfinish(conn);",
adamc@871 224 newline,
adamc@871 225 string "uw_error(ctx, FATAL, \"Table '",
adamc@871 226 string s,
adamc@871 227 string "' has extra columns.\");",
adamc@871 228 newline],
adamc@871 229 string "}",
adamc@871 230 newline,
adamc@871 231 newline,
adamc@871 232 string "PQclear(res);",
adamc@871 233 newline]
adamc@871 234 end
adamc@871 235
adamc@872 236 fun init {dbstring, prepared = ss, tables, views, sequences} =
adamc@866 237 box [if #persistent (currentProtocol ()) then
adamc@870 238 box [string "static void uw_db_validate(uw_context ctx) {",
adamc@870 239 newline,
adamc@870 240 string "PGconn *conn = uw_get_db(ctx);",
adamc@870 241 newline,
adamc@870 242 string "PGresult *res;",
adamc@870 243 newline,
adamc@870 244 newline,
adamc@872 245 p_list_sep newline (checkRel ("tables", true)) tables,
adamc@872 246 p_list_sep newline (checkRel ("views", false)) views,
adamc@870 247
adamc@870 248 p_list_sep newline
adamc@870 249 (fn s =>
adamc@870 250 let
adamc@870 251 val sl = CharVector.map Char.toLower s
adamc@870 252
adamc@870 253 val q = "SELECT COUNT(*) FROM pg_class WHERE relname = '"
adamc@870 254 ^ sl ^ "' AND relkind = 'S'"
adamc@870 255 in
adamc@870 256 box [string "res = PQexec(conn, \"",
adamc@870 257 string q,
adamc@870 258 string "\");",
adamc@870 259 newline,
adamc@870 260 newline,
adamc@870 261 string "if (res == NULL) {",
adamc@870 262 newline,
adamc@870 263 box [string "PQfinish(conn);",
adamc@870 264 newline,
adamc@870 265 string "uw_error(ctx, FATAL, \"Out of memory allocating query result.\");",
adamc@870 266 newline],
adamc@870 267 string "}",
adamc@870 268 newline,
adamc@870 269 newline,
adamc@870 270 string "if (PQresultStatus(res) != PGRES_TUPLES_OK) {",
adamc@870 271 newline,
adamc@870 272 box [string "char msg[1024];",
adamc@870 273 newline,
adamc@870 274 string "strncpy(msg, PQerrorMessage(conn), 1024);",
adamc@870 275 newline,
adamc@870 276 string "msg[1023] = 0;",
adamc@870 277 newline,
adamc@870 278 string "PQclear(res);",
adamc@870 279 newline,
adamc@870 280 string "PQfinish(conn);",
adamc@870 281 newline,
adamc@870 282 string "uw_error(ctx, FATAL, \"Query failed:\\n",
adamc@870 283 string q,
adamc@870 284 string "\\n%s\", msg);",
adamc@870 285 newline],
adamc@870 286 string "}",
adamc@870 287 newline,
adamc@870 288 newline,
adamc@870 289 string "if (strcmp(PQgetvalue(res, 0, 0), \"1\")) {",
adamc@870 290 newline,
adamc@870 291 box [string "PQclear(res);",
adamc@870 292 newline,
adamc@870 293 string "PQfinish(conn);",
adamc@870 294 newline,
adamc@870 295 string "uw_error(ctx, FATAL, \"Sequence '",
adamc@870 296 string s,
adamc@870 297 string "' does not exist.\");",
adamc@870 298 newline],
adamc@870 299 string "}",
adamc@870 300 newline,
adamc@870 301 newline,
adamc@870 302 string "PQclear(res);",
adamc@870 303 newline]
adamc@870 304 end) sequences,
adamc@870 305
adamc@870 306 string "}",
adamc@870 307
adamc@870 308 string "static void uw_db_prepare(uw_context ctx) {",
adamc@866 309 newline,
adamc@866 310 string "PGconn *conn = uw_get_db(ctx);",
adamc@866 311 newline,
adamc@866 312 string "PGresult *res;",
adamc@866 313 newline,
adamc@866 314 newline,
adamc@866 315
adamc@866 316 p_list_sepi newline (fn i => fn (s, n) =>
adamc@866 317 box [string "res = PQprepare(conn, \"uw",
adamc@866 318 string (Int.toString i),
adamc@866 319 string "\", \"",
adamc@866 320 string (String.toString s),
adamc@866 321 string "\", ",
adamc@866 322 string (Int.toString n),
adamc@866 323 string ", NULL);",
adamc@866 324 newline,
adamc@866 325 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adamc@866 326 newline,
adamc@866 327 box [string "char msg[1024];",
adamc@866 328 newline,
adamc@866 329 string "strncpy(msg, PQerrorMessage(conn), 1024);",
adamc@866 330 newline,
adamc@866 331 string "msg[1023] = 0;",
adamc@866 332 newline,
adamc@866 333 string "PQclear(res);",
adamc@866 334 newline,
adamc@866 335 string "PQfinish(conn);",
adamc@866 336 newline,
adamc@866 337 string "uw_error(ctx, FATAL, \"Unable to create prepared statement:\\n",
adamc@866 338 string (String.toString s),
adamc@866 339 string "\\n%s\", msg);",
adamc@866 340 newline],
adamc@866 341 string "}",
adamc@866 342 newline,
adamc@866 343 string "PQclear(res);",
adamc@866 344 newline])
adamc@866 345 ss,
adamc@866 346
adamc@866 347 string "}",
adamc@866 348 newline,
adamc@866 349 newline,
adamc@866 350
adamc@866 351 string "void uw_db_close(uw_context ctx) {",
adamc@866 352 newline,
adamc@866 353 string "PQfinish(uw_get_db(ctx));",
adamc@866 354 newline,
adamc@866 355 string "}",
adamc@866 356 newline,
adamc@866 357 newline,
adamc@866 358
adamc@866 359 string "int uw_db_begin(uw_context ctx) {",
adamc@866 360 newline,
adamc@866 361 string "PGconn *conn = uw_get_db(ctx);",
adamc@866 362 newline,
adamc@866 363 string "PGresult *res = PQexec(conn, \"BEGIN ISOLATION LEVEL SERIALIZABLE\");",
adamc@866 364 newline,
adamc@866 365 newline,
adamc@866 366 string "if (res == NULL) return 1;",
adamc@866 367 newline,
adamc@866 368 newline,
adamc@866 369 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adamc@866 370 box [string "PQclear(res);",
adamc@866 371 newline,
adamc@866 372 string "return 1;",
adamc@866 373 newline],
adamc@866 374 string "}",
adamc@866 375 newline,
adamc@866 376 string "return 0;",
adamc@866 377 newline,
adamc@866 378 string "}",
adamc@866 379 newline,
adamc@866 380 newline,
adamc@866 381
adamc@866 382 string "int uw_db_commit(uw_context ctx) {",
adamc@866 383 newline,
adamc@866 384 string "PGconn *conn = uw_get_db(ctx);",
adamc@866 385 newline,
adamc@866 386 string "PGresult *res = PQexec(conn, \"COMMIT\");",
adamc@866 387 newline,
adamc@866 388 newline,
adamc@866 389 string "if (res == NULL) return 1;",
adamc@866 390 newline,
adamc@866 391 newline,
adamc@866 392 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adamc@866 393 box [string "PQclear(res);",
adamc@866 394 newline,
adamc@866 395 string "return 1;",
adamc@866 396 newline],
adamc@866 397 string "}",
adamc@866 398 newline,
adamc@866 399 string "return 0;",
adamc@866 400 newline,
adamc@866 401 string "}",
adamc@866 402 newline,
adamc@866 403 newline,
adamc@866 404
adamc@866 405 string "int uw_db_rollback(uw_context ctx) {",
adamc@866 406 newline,
adamc@866 407 string "PGconn *conn = uw_get_db(ctx);",
adamc@866 408 newline,
adamc@866 409 string "PGresult *res = PQexec(conn, \"ROLLBACK\");",
adamc@866 410 newline,
adamc@866 411 newline,
adamc@866 412 string "if (res == NULL) return 1;",
adamc@866 413 newline,
adamc@866 414 newline,
adamc@866 415 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adamc@866 416 box [string "PQclear(res);",
adamc@866 417 newline,
adamc@866 418 string "return 1;",
adamc@866 419 newline],
adamc@866 420 string "}",
adamc@866 421 newline,
adamc@866 422 string "return 0;",
adamc@866 423 newline,
adamc@866 424 string "}",
adamc@866 425 newline,
adamc@866 426 newline]
adamc@866 427 else
adamc@870 428 box [string "static void uw_db_validate(uw_context ctx) { }",
adamc@870 429 newline,
adamc@870 430 string "static void uw_db_prepare(uw_context ctx) { }"],
adamc@870 431
adamc@866 432 newline,
adamc@866 433 newline,
adamc@866 434
adamc@866 435 string "void uw_db_init(uw_context ctx) {",
adamc@866 436 newline,
adamc@866 437 string "PGconn *conn = PQconnectdb(\"",
adamc@866 438 string (String.toString dbstring),
adamc@866 439 string "\");",
adamc@866 440 newline,
adamc@866 441 string "if (conn == NULL) uw_error(ctx, FATAL, ",
adamc@866 442 string "\"libpq can't allocate a connection.\");",
adamc@866 443 newline,
adamc@866 444 string "if (PQstatus(conn) != CONNECTION_OK) {",
adamc@866 445 newline,
adamc@866 446 box [string "char msg[1024];",
adamc@866 447 newline,
adamc@866 448 string "strncpy(msg, PQerrorMessage(conn), 1024);",
adamc@866 449 newline,
adamc@866 450 string "msg[1023] = 0;",
adamc@866 451 newline,
adamc@866 452 string "PQfinish(conn);",
adamc@866 453 newline,
adamc@866 454 string "uw_error(ctx, BOUNDED_RETRY, ",
adamc@866 455 string "\"Connection to Postgres server failed: %s\", msg);"],
adamc@866 456 newline,
adamc@866 457 string "}",
adamc@866 458 newline,
adamc@866 459 string "uw_set_db(ctx, conn);",
adamc@866 460 newline,
adamc@866 461 string "uw_db_validate(ctx);",
adamc@866 462 newline,
adamc@866 463 string "uw_db_prepare(ctx);",
adamc@866 464 newline,
adamc@866 465 string "}"]
adamc@866 466
adamc@867 467 fun p_getcol {wontLeakStrings, col = i, typ = t} =
adamc@867 468 let
adamc@867 469 fun p_unsql t e eLen =
adamc@867 470 case t of
adamc@867 471 Int => box [string "uw_Basis_stringToInt_error(ctx, ", e, string ")"]
adamc@867 472 | Float => box [string "uw_Basis_stringToFloat_error(ctx, ", e, string ")"]
adamc@867 473 | String =>
adamc@867 474 if wontLeakStrings then
adamc@867 475 e
adamc@867 476 else
adamc@867 477 box [string "uw_strdup(ctx, ", e, string ")"]
adamc@867 478 | Bool => box [string "uw_Basis_stringToBool_error(ctx, ", e, string ")"]
adamc@867 479 | Time => box [string "uw_Basis_stringToTime_error(ctx, ", e, string ")"]
adamc@867 480 | Blob => box [string "uw_Basis_stringToBlob_error(ctx, ",
adamc@867 481 e,
adamc@867 482 string ", ",
adamc@867 483 eLen,
adamc@867 484 string ")"]
adamc@867 485 | Channel => box [string "uw_Basis_stringToChannel_error(ctx, ", e, string ")"]
adamc@867 486 | Client => box [string "uw_Basis_stringToClient_error(ctx, ", e, string ")"]
adamc@867 487
adamc@867 488 | Nullable _ => raise Fail "Postgres: Recursive Nullable"
adamc@867 489
adamc@867 490 fun getter t =
adamc@867 491 case t of
adamc@867 492 Nullable t =>
adamc@867 493 box [string "(PQgetisnull(res, i, ",
adamc@867 494 string (Int.toString i),
adamc@867 495 string ") ? NULL : ",
adamc@867 496 case t of
adamc@867 497 String => getter t
adamc@867 498 | _ => box [string "({",
adamc@867 499 newline,
adamc@870 500 string (p_sql_type t),
adamc@867 501 space,
adamc@867 502 string "*tmp = uw_malloc(ctx, sizeof(",
adamc@870 503 string (p_sql_type t),
adamc@867 504 string "));",
adamc@867 505 newline,
adamc@867 506 string "*tmp = ",
adamc@867 507 getter t,
adamc@867 508 string ";",
adamc@867 509 newline,
adamc@867 510 string "tmp;",
adamc@867 511 newline,
adamc@867 512 string "})"],
adamc@867 513 string ")"]
adamc@867 514 | _ =>
adamc@867 515 box [string "(PQgetisnull(res, i, ",
adamc@867 516 string (Int.toString i),
adamc@867 517 string ") ? ",
adamc@867 518 box [string "({",
adamc@870 519 string (p_sql_type t),
adamc@867 520 space,
adamc@867 521 string "tmp;",
adamc@867 522 newline,
adamc@867 523 string "uw_error(ctx, FATAL, \"Unexpectedly NULL field #",
adamc@867 524 string (Int.toString i),
adamc@867 525 string "\");",
adamc@867 526 newline,
adamc@867 527 string "tmp;",
adamc@867 528 newline,
adamc@867 529 string "})"],
adamc@867 530 string " : ",
adamc@867 531 p_unsql t
adamc@867 532 (box [string "PQgetvalue(res, i, ",
adamc@867 533 string (Int.toString i),
adamc@867 534 string ")"])
adamc@867 535 (box [string "PQgetlength(res, i, ",
adamc@867 536 string (Int.toString i),
adamc@867 537 string ")"]),
adamc@867 538 string ")"]
adamc@867 539 in
adamc@867 540 getter t
adamc@867 541 end
adamc@867 542
adamc@867 543 fun queryCommon {loc, query, numCols, doCols} =
adamc@867 544 box [string "int n, i;",
adamc@867 545 newline,
adamc@867 546 newline,
adamc@867 547
adamc@867 548 string "if (res == NULL) uw_error(ctx, FATAL, \"Out of memory allocating query result.\");",
adamc@867 549 newline,
adamc@867 550 newline,
adamc@867 551
adamc@867 552 string "if (PQresultStatus(res) != PGRES_TUPLES_OK) {",
adamc@867 553 newline,
adamc@867 554 box [string "PQclear(res);",
adamc@867 555 newline,
adamc@867 556 string "uw_error(ctx, FATAL, \"",
adamc@867 557 string (ErrorMsg.spanToString loc),
adamc@867 558 string ": Query failed:\\n%s\\n%s\", ",
adamc@867 559 query,
adamc@867 560 string ", PQerrorMessage(conn));",
adamc@867 561 newline],
adamc@867 562 string "}",
adamc@867 563 newline,
adamc@867 564 newline,
adamc@867 565
adamc@867 566 string "if (PQnfields(res) != ",
adamc@867 567 string (Int.toString numCols),
adamc@867 568 string ") {",
adamc@867 569 newline,
adamc@867 570 box [string "int nf = PQnfields(res);",
adamc@867 571 newline,
adamc@867 572 string "PQclear(res);",
adamc@867 573 newline,
adamc@867 574 string "uw_error(ctx, FATAL, \"",
adamc@867 575 string (ErrorMsg.spanToString loc),
adamc@867 576 string ": Query returned %d columns instead of ",
adamc@867 577 string (Int.toString numCols),
adamc@867 578 string ":\\n%s\\n%s\", nf, ",
adamc@867 579 query,
adamc@867 580 string ", PQerrorMessage(conn));",
adamc@867 581 newline],
adamc@867 582 string "}",
adamc@867 583 newline,
adamc@867 584 newline,
adamc@867 585
adamc@867 586 string "uw_end_region(ctx);",
adamc@867 587 newline,
adamc@867 588 string "uw_push_cleanup(ctx, (void (*)(void *))PQclear, res);",
adamc@867 589 newline,
adamc@867 590 string "n = PQntuples(res);",
adamc@867 591 newline,
adamc@867 592 string "for (i = 0; i < n; ++i) {",
adamc@867 593 newline,
adamc@867 594 doCols p_getcol,
adamc@867 595 string "}",
adamc@867 596 newline,
adamc@867 597 newline,
adamc@867 598 string "uw_pop_cleanup(ctx);",
adamc@867 599 newline]
adamc@867 600
adamc@867 601 fun query {loc, numCols, doCols} =
adamc@867 602 box [string "PGconn *conn = uw_get_db(ctx);",
adamc@867 603 newline,
adamc@867 604 string "PGresult *res = PQexecParams(conn, query, 0, NULL, NULL, NULL, NULL, 0);",
adamc@867 605 newline,
adamc@867 606 newline,
adamc@867 607 queryCommon {loc = loc, numCols = numCols, doCols = doCols, query = string "query"}]
adamc@867 608
adamc@867 609 fun p_ensql t e =
adamc@867 610 case t of
adamc@867 611 Int => box [string "uw_Basis_attrifyInt(ctx, ", e, string ")"]
adamc@867 612 | Float => box [string "uw_Basis_attrifyFloat(ctx, ", e, string ")"]
adamc@867 613 | String => e
adamc@867 614 | Bool => box [string "(", e, string " ? \"TRUE\" : \"FALSE\")"]
adamc@867 615 | Time => box [string "uw_Basis_attrifyTime(ctx, ", e, string ")"]
adamc@867 616 | Blob => box [e, string ".data"]
adamc@867 617 | Channel => box [string "uw_Basis_attrifyChannel(ctx, ", e, string ")"]
adamc@867 618 | Client => box [string "uw_Basis_attrifyClient(ctx, ", e, string ")"]
adamc@867 619 | Nullable String => e
adamc@867 620 | Nullable t => box [string "(",
adamc@867 621 e,
adamc@867 622 string " == NULL ? NULL : ",
adamc@867 623 p_ensql t (box [string "(*", e, string ")"]),
adamc@867 624 string ")"]
adamc@867 625
adamc@867 626 fun queryPrepared {loc, id, query, inputs, numCols, doCols} =
adamc@867 627 box [string "PGconn *conn = uw_get_db(ctx);",
adamc@867 628 newline,
adamc@867 629 string "const int paramFormats[] = { ",
adamc@867 630 p_list_sep (box [string ",", space])
adamc@867 631 (fn t => if isBlob t then string "1" else string "0") inputs,
adamc@867 632 string " };",
adamc@867 633 newline,
adamc@867 634 string "const int paramLengths[] = { ",
adamc@867 635 p_list_sepi (box [string ",", space])
adamc@867 636 (fn i => fn Blob => string ("arg" ^ Int.toString (i + 1) ^ ".size")
adamc@867 637 | Nullable Blob => string ("arg" ^ Int.toString (i + 1)
adamc@867 638 ^ "?arg" ^ Int.toString (i + 1) ^ "->size:0")
adamc@867 639 | _ => string "0") inputs,
adamc@867 640 string " };",
adamc@867 641 newline,
adamc@867 642 string "const char *paramValues[] = { ",
adamc@867 643 p_list_sepi (box [string ",", space])
adamc@867 644 (fn i => fn t => p_ensql t (box [string "arg",
adamc@867 645 string (Int.toString (i + 1))]))
adamc@867 646 inputs,
adamc@867 647 string " };",
adamc@867 648 newline,
adamc@867 649 newline,
adamc@867 650 string "PGresult *res = ",
adamc@867 651 if #persistent (Settings.currentProtocol ()) then
adamc@867 652 box [string "PQexecPrepared(conn, \"uw",
adamc@867 653 string (Int.toString id),
adamc@867 654 string "\", ",
adamc@867 655 string (Int.toString (length inputs)),
adamc@867 656 string ", paramValues, paramLengths, paramFormats, 0);"]
adamc@867 657 else
adamc@867 658 box [string "PQexecParams(conn, \"",
adamc@867 659 string (String.toString query),
adamc@867 660 string "\", ",
adamc@867 661 string (Int.toString (length inputs)),
adamc@867 662 string ", NULL, paramValues, paramLengths, paramFormats, 0);"],
adamc@867 663 newline,
adamc@867 664 newline,
adamc@867 665 queryCommon {loc = loc, numCols = numCols, doCols = doCols, query = box [string "\"",
adamc@867 666 string (String.toString query),
adamc@867 667 string "\""]}]
adamc@867 668
adamc@868 669 fun dmlCommon {loc, dml} =
adamc@868 670 box [string "if (res == NULL) uw_error(ctx, FATAL, \"Out of memory allocating DML result.\");",
adamc@868 671 newline,
adamc@868 672 newline,
adamc@868 673
adamc@868 674 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adamc@868 675 newline,
adamc@868 676 box [string "if (!strcmp(PQresultErrorField(res, PG_DIAG_SQLSTATE), \"40001\")) {",
adamc@868 677 box [newline,
adamc@868 678 string "PQclear(res);",
adamc@868 679 newline,
adamc@868 680 string "uw_error(ctx, UNLIMITED_RETRY, \"Serialization failure\");",
adamc@868 681 newline],
adamc@868 682 string "}",
adamc@868 683 newline,
adamc@868 684 string "PQclear(res);",
adamc@868 685 newline,
adamc@868 686 string "uw_error(ctx, FATAL, \"",
adamc@868 687 string (ErrorMsg.spanToString loc),
adamc@868 688 string ": DML failed:\\n%s\\n%s\", ",
adamc@868 689 dml,
adamc@868 690 string ", PQerrorMessage(conn));",
adamc@868 691 newline],
adamc@868 692 string "}",
adamc@868 693 newline,
adamc@868 694 newline,
adamc@868 695
adamc@868 696 string "PQclear(res);",
adamc@868 697 newline]
adamc@868 698
adamc@868 699 fun dml loc =
adamc@868 700 box [string "PGconn *conn = uw_get_db(ctx);",
adamc@868 701 newline,
adamc@868 702 string "PGresult *res = PQexecParams(conn, dml, 0, NULL, NULL, NULL, NULL, 0);",
adamc@868 703 newline,
adamc@868 704 newline,
adamc@868 705 dmlCommon {loc = loc, dml = string "dml"}]
adamc@868 706
adamc@868 707 fun dmlPrepared {loc, id, dml, inputs} =
adamc@868 708 box [string "PGconn *conn = uw_get_db(ctx);",
adamc@868 709 newline,
adamc@868 710 string "const int paramFormats[] = { ",
adamc@868 711 p_list_sep (box [string ",", space])
adamc@868 712 (fn t => if isBlob t then string "1" else string "0") inputs,
adamc@868 713 string " };",
adamc@868 714 newline,
adamc@868 715 string "const int paramLengths[] = { ",
adamc@868 716 p_list_sepi (box [string ",", space])
adamc@868 717 (fn i => fn Blob => string ("arg" ^ Int.toString (i + 1) ^ ".size")
adamc@868 718 | Nullable Blob => string ("arg" ^ Int.toString (i + 1)
adamc@868 719 ^ "?arg" ^ Int.toString (i + 1) ^ "->size:0")
adamc@868 720 | _ => string "0") inputs,
adamc@868 721 string " };",
adamc@868 722 newline,
adamc@868 723 string "const char *paramValues[] = { ",
adamc@868 724 p_list_sepi (box [string ",", space])
adamc@868 725 (fn i => fn t => p_ensql t (box [string "arg",
adamc@868 726 string (Int.toString (i + 1))]))
adamc@868 727 inputs,
adamc@868 728 string " };",
adamc@868 729 newline,
adamc@868 730 newline,
adamc@868 731 string "PGresult *res = ",
adamc@868 732 if #persistent (Settings.currentProtocol ()) then
adamc@868 733 box [string "PQexecPrepared(conn, \"uw",
adamc@868 734 string (Int.toString id),
adamc@868 735 string "\", ",
adamc@868 736 string (Int.toString (length inputs)),
adamc@868 737 string ", paramValues, paramLengths, paramFormats, 0);"]
adamc@868 738 else
adamc@868 739 box [string "PQexecParams(conn, \"",
adamc@868 740 string (String.toString dml),
adamc@868 741 string "\", ",
adamc@868 742 string (Int.toString (length inputs)),
adamc@868 743 string ", NULL, paramValues, paramLengths, paramFormats, 0);"],
adamc@868 744 newline,
adamc@868 745 newline,
adamc@868 746 dmlCommon {loc = loc, dml = box [string "\"",
adamc@868 747 string (String.toString dml),
adamc@868 748 string "\""]}]
adamc@868 749
adamc@869 750 fun nextvalCommon {loc, query} =
adamc@869 751 box [string "if (res == NULL) uw_error(ctx, FATAL, \"Out of memory allocating nextval result.\");",
adamc@869 752 newline,
adamc@869 753 newline,
adamc@869 754
adamc@869 755 string "if (PQresultStatus(res) != PGRES_TUPLES_OK) {",
adamc@869 756 newline,
adamc@869 757 box [string "PQclear(res);",
adamc@869 758 newline,
adamc@869 759 string "uw_error(ctx, FATAL, \"",
adamc@869 760 string (ErrorMsg.spanToString loc),
adamc@869 761 string ": Query failed:\\n%s\\n%s\", ",
adamc@869 762 query,
adamc@869 763 string ", PQerrorMessage(conn));",
adamc@869 764 newline],
adamc@869 765 string "}",
adamc@869 766 newline,
adamc@869 767 newline,
adamc@869 768
adamc@869 769 string "uw_end_region(ctx);",
adamc@869 770 newline,
adamc@869 771 string "n = PQntuples(res);",
adamc@869 772 newline,
adamc@869 773 string "if (n != 1) {",
adamc@869 774 newline,
adamc@869 775 box [string "PQclear(res);",
adamc@869 776 newline,
adamc@869 777 string "uw_error(ctx, FATAL, \"",
adamc@869 778 string (ErrorMsg.spanToString loc),
adamc@869 779 string ": Wrong number of result rows:\\n%s\\n%s\", ",
adamc@869 780 query,
adamc@869 781 string ", PQerrorMessage(conn));",
adamc@869 782 newline],
adamc@869 783 string "}",
adamc@869 784 newline,
adamc@869 785 newline,
adamc@869 786
adamc@869 787 string "n = uw_Basis_stringToInt_error(ctx, PQgetvalue(res, 0, 0));",
adamc@869 788 newline,
adamc@869 789 string "PQclear(res);",
adamc@869 790 newline]
adamc@869 791
adamc@869 792 fun nextval loc =
adamc@869 793 box [string "PGconn *conn = uw_get_db(ctx);",
adamc@869 794 newline,
adamc@869 795 string "PGresult *res = PQexecParams(conn, query, 0, NULL, NULL, NULL, NULL, 0);",
adamc@869 796 newline,
adamc@869 797 newline,
adamc@869 798 nextvalCommon {loc = loc, query = string "query"}]
adamc@869 799
adamc@869 800 fun nextvalPrepared {loc, id, query} =
adamc@869 801 box [string "PGconn *conn = uw_get_db(ctx);",
adamc@869 802 newline,
adamc@869 803 newline,
adamc@869 804 string "PGresult *res = ",
adamc@869 805 if #persistent (Settings.currentProtocol ()) then
adamc@869 806 box [string "PQexecPrepared(conn, \"uw",
adamc@869 807 string (Int.toString id),
adamc@869 808 string "\", 0, NULL, NULL, NULL, 0);"]
adamc@869 809 else
adamc@869 810 box [string "PQexecParams(conn, \"",
adamc@869 811 string (String.toString query),
adamc@869 812 string "\", 0, NULL, NULL, NULL, NULL, 0);"],
adamc@869 813 newline,
adamc@869 814 newline,
adamc@869 815 nextvalCommon {loc = loc, query = box [string "\"",
adamc@869 816 string (String.toString query),
adamc@869 817 string "\""]}]
adamc@869 818
adamc@866 819 val () = addDbms {name = "postgres",
adamc@866 820 header = "postgresql/libpq-fe.h",
adamc@866 821 link = "-lpq",
adamc@866 822 global_init = box [string "void uw_client_init() { }",
adamc@866 823 newline],
adamc@867 824 init = init,
adamc@867 825 query = query,
adamc@868 826 queryPrepared = queryPrepared,
adamc@868 827 dml = dml,
adamc@869 828 dmlPrepared = dmlPrepared,
adamc@869 829 nextval = nextval,
adamc@869 830 nextvalPrepared = nextvalPrepared}
adamc@866 831 val () = setDbms "postgres"
adamc@866 832
adamc@866 833 end