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MySQL: catch deadlocks during queries
author Adam Chlipala <adam@chlipala.net>
date Sun, 05 Jan 2014 20:20:09 -0500
parents 0992323fa264
children 4ef0c6605b3a
rev   line source
adam@1295 1 (* Copyright (c) 2008-2010, 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
adam@1682 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@873 37 fun p_sql_type t =
adamc@873 38 case t of
adamc@873 39 Int => "int8"
adamc@873 40 | Float => "float8"
adamc@873 41 | String => "text"
adamc@1011 42 | Char => "char"
adamc@873 43 | Bool => "bool"
adamc@873 44 | Time => "timestamp"
adamc@873 45 | Blob => "bytea"
adamc@873 46 | Channel => "int8"
adamc@873 47 | Client => "int4"
adamc@873 48 | Nullable t => p_sql_type t
adamc@873 49
adamc@870 50 fun p_sql_type_base t =
adamc@870 51 case t of
adamc@871 52 Int => "bigint"
adamc@871 53 | Float => "double precision"
adamc@870 54 | String => "text"
adamc@1011 55 | Char => "character"
adamc@871 56 | Bool => "boolean"
adamc@871 57 | Time => "timestamp without time zone"
adamc@870 58 | Blob => "bytea"
adamc@871 59 | Channel => "bigint"
adamc@871 60 | Client => "integer"
adamc@870 61 | Nullable t => p_sql_type_base t
adamc@870 62
adamc@872 63 fun checkRel (table, checkNullable) (s, xts) =
adamc@871 64 let
adamc@871 65 val sl = CharVector.map Char.toLower s
adam@1953 66 val sl = if size sl > 1 andalso String.sub (sl, 0) = #"\"" then
adam@1953 67 String.substring (sl, 1, size sl - 2)
adam@1953 68 else
adam@1953 69 sl
adamc@871 70
adam@1953 71 val q = "SELECT COUNT(*) FROM information_schema." ^ table ^ " WHERE LOWER(table_name) = '"
adamc@871 72 ^ sl ^ "'"
adamc@871 73
adamc@871 74 val q' = String.concat ["SELECT COUNT(*) FROM information_schema.columns WHERE table_name = '",
adamc@871 75 sl,
adamc@871 76 "' AND (",
adam@1600 77 case String.concatWith " OR "
adam@1600 78 (map (fn (x, t) =>
adam@1953 79 String.concat ["(LOWER(column_name) = '",
adam@1953 80 Settings.mangleSqlCatalog
adam@1953 81 (CharVector.map
adam@1953 82 Char.toLower (ident x)),
adam@1600 83 (case p_sql_type_base t of
adam@1600 84 "bigint" =>
adam@1953 85 "' AND data_type IN ('bigint', 'numeric', 'integer')"
adam@1953 86 | "text" =>
adam@1953 87 "' AND data_type IN ('text', 'character varying')"
adam@1600 88 | t =>
adam@1600 89 String.concat ["' AND data_type = '",
adam@1600 90 t,
adam@1600 91 "'"]),
adam@1600 92 if checkNullable then
adam@1600 93 (" AND is_nullable = '"
adam@1600 94 ^ (if isNotNull t then
adam@1600 95 "NO"
adam@1600 96 else
adam@1600 97 "YES")
adam@1600 98 ^ "'")
adam@1600 99 else
adam@1600 100 "",
adam@1600 101 ")"]) xts) of
adam@1600 102 "" => "FALSE"
adam@1600 103 | s => s,
adamc@871 104 ")"]
adamc@871 105
adamc@871 106 val q'' = String.concat ["SELECT COUNT(*) FROM information_schema.columns WHERE table_name = '",
adamc@871 107 sl,
adam@1953 108 "' AND LOWER(column_name) LIKE '", Settings.mangleSqlCatalog "%'"]
adamc@871 109 in
adamc@871 110 box [string "res = PQexec(conn, \"",
adamc@871 111 string q,
adamc@871 112 string "\");",
adamc@871 113 newline,
adamc@871 114 newline,
adamc@871 115 string "if (res == NULL) {",
adamc@871 116 newline,
adamc@871 117 box [string "PQfinish(conn);",
adamc@871 118 newline,
adamc@871 119 string "uw_error(ctx, FATAL, \"Out of memory allocating query result.\");",
adamc@871 120 newline],
adamc@871 121 string "}",
adamc@871 122 newline,
adamc@871 123 newline,
adamc@871 124 string "if (PQresultStatus(res) != PGRES_TUPLES_OK) {",
adamc@871 125 newline,
adamc@871 126 box [string "char msg[1024];",
adamc@871 127 newline,
adamc@871 128 string "strncpy(msg, PQerrorMessage(conn), 1024);",
adamc@871 129 newline,
adamc@871 130 string "msg[1023] = 0;",
adamc@871 131 newline,
adamc@871 132 string "PQclear(res);",
adamc@871 133 newline,
adamc@871 134 string "PQfinish(conn);",
adamc@871 135 newline,
adamc@871 136 string "uw_error(ctx, FATAL, \"Query failed:\\n",
adamc@871 137 string q,
adamc@871 138 string "\\n%s\", msg);",
adamc@871 139 newline],
adamc@871 140 string "}",
adamc@871 141 newline,
adamc@871 142 newline,
adamc@871 143 string "if (strcmp(PQgetvalue(res, 0, 0), \"1\")) {",
adamc@871 144 newline,
adamc@871 145 box [string "PQclear(res);",
adamc@871 146 newline,
adamc@871 147 string "PQfinish(conn);",
adamc@871 148 newline,
adamc@871 149 string "uw_error(ctx, FATAL, \"Table '",
adam@1953 150 string sl,
adamc@871 151 string "' does not exist.\");",
adamc@871 152 newline],
adamc@871 153 string "}",
adamc@871 154 newline,
adamc@871 155 newline,
adamc@871 156 string "PQclear(res);",
adamc@871 157 newline,
adamc@871 158
adamc@871 159 string "res = PQexec(conn, \"",
adamc@871 160 string q',
adamc@871 161 string "\");",
adamc@871 162 newline,
adamc@871 163 newline,
adamc@871 164 string "if (res == NULL) {",
adamc@871 165 newline,
adamc@871 166 box [string "PQfinish(conn);",
adamc@871 167 newline,
adamc@871 168 string "uw_error(ctx, FATAL, \"Out of memory allocating query result.\");",
adamc@871 169 newline],
adamc@871 170 string "}",
adamc@871 171 newline,
adamc@871 172 newline,
adamc@871 173 string "if (PQresultStatus(res) != PGRES_TUPLES_OK) {",
adamc@871 174 newline,
adamc@871 175 box [string "char msg[1024];",
adamc@871 176 newline,
adamc@871 177 string "strncpy(msg, PQerrorMessage(conn), 1024);",
adamc@871 178 newline,
adamc@871 179 string "msg[1023] = 0;",
adamc@871 180 newline,
adamc@871 181 string "PQclear(res);",
adamc@871 182 newline,
adamc@871 183 string "PQfinish(conn);",
adamc@871 184 newline,
adamc@871 185 string "uw_error(ctx, FATAL, \"Query failed:\\n",
adamc@871 186 string q',
adamc@871 187 string "\\n%s\", msg);",
adamc@871 188 newline],
adamc@871 189 string "}",
adamc@871 190 newline,
adamc@871 191 newline,
adamc@871 192 string "if (strcmp(PQgetvalue(res, 0, 0), \"",
adamc@871 193 string (Int.toString (length xts)),
adamc@871 194 string "\")) {",
adamc@871 195 newline,
adamc@871 196 box [string "PQclear(res);",
adamc@871 197 newline,
adamc@871 198 string "PQfinish(conn);",
adamc@871 199 newline,
adamc@871 200 string "uw_error(ctx, FATAL, \"Table '",
adam@1953 201 string sl,
adamc@871 202 string "' has the wrong column types.\");",
adamc@871 203 newline],
adamc@871 204 string "}",
adamc@871 205 newline,
adamc@871 206 newline,
adamc@871 207 string "PQclear(res);",
adamc@871 208 newline,
adamc@871 209 newline,
adamc@871 210
adamc@871 211 string "res = PQexec(conn, \"",
adamc@871 212 string q'',
adamc@871 213 string "\");",
adamc@871 214 newline,
adamc@871 215 newline,
adamc@871 216 string "if (res == NULL) {",
adamc@871 217 newline,
adamc@871 218 box [string "PQfinish(conn);",
adamc@871 219 newline,
adamc@871 220 string "uw_error(ctx, FATAL, \"Out of memory allocating query result.\");",
adamc@871 221 newline],
adamc@871 222 string "}",
adamc@871 223 newline,
adamc@871 224 newline,
adamc@871 225 string "if (PQresultStatus(res) != PGRES_TUPLES_OK) {",
adamc@871 226 newline,
adamc@871 227 box [string "char msg[1024];",
adamc@871 228 newline,
adamc@871 229 string "strncpy(msg, PQerrorMessage(conn), 1024);",
adamc@871 230 newline,
adamc@871 231 string "msg[1023] = 0;",
adamc@871 232 newline,
adamc@871 233 string "PQclear(res);",
adamc@871 234 newline,
adamc@871 235 string "PQfinish(conn);",
adamc@871 236 newline,
adamc@871 237 string "uw_error(ctx, FATAL, \"Query failed:\\n",
adamc@871 238 string q'',
adamc@871 239 string "\\n%s\", msg);",
adamc@871 240 newline],
adamc@871 241 string "}",
adamc@871 242 newline,
adamc@871 243 newline,
adamc@871 244 string "if (strcmp(PQgetvalue(res, 0, 0), \"",
adamc@871 245 string (Int.toString (length xts)),
adamc@871 246 string "\")) {",
adamc@871 247 newline,
adamc@871 248 box [string "PQclear(res);",
adamc@871 249 newline,
adamc@871 250 string "PQfinish(conn);",
adamc@871 251 newline,
adamc@871 252 string "uw_error(ctx, FATAL, \"Table '",
adam@1953 253 string sl,
adamc@871 254 string "' has extra columns.\");",
adamc@871 255 newline],
adamc@871 256 string "}",
adamc@871 257 newline,
adamc@871 258 newline,
adamc@871 259 string "PQclear(res);",
adamc@871 260 newline]
adamc@871 261 end
adamc@871 262
adamc@872 263 fun init {dbstring, prepared = ss, tables, views, sequences} =
adamc@866 264 box [if #persistent (currentProtocol ()) then
adamc@1094 265 box [string "static void uw_db_validate(uw_context ctx) {",
adamc@870 266 newline,
adamc@870 267 string "PGconn *conn = uw_get_db(ctx);",
adamc@870 268 newline,
adamc@870 269 string "PGresult *res;",
adamc@870 270 newline,
adamc@870 271 newline,
adamc@872 272 p_list_sep newline (checkRel ("tables", true)) tables,
adamc@872 273 p_list_sep newline (checkRel ("views", false)) views,
adamc@870 274
adamc@870 275 p_list_sep newline
adamc@870 276 (fn s =>
adamc@870 277 let
adamc@870 278 val sl = CharVector.map Char.toLower s
adamc@870 279
adamc@870 280 val q = "SELECT COUNT(*) FROM pg_class WHERE relname = '"
adamc@870 281 ^ sl ^ "' AND relkind = 'S'"
adamc@870 282 in
adamc@870 283 box [string "res = PQexec(conn, \"",
adamc@870 284 string q,
adamc@870 285 string "\");",
adamc@870 286 newline,
adamc@870 287 newline,
adamc@870 288 string "if (res == NULL) {",
adamc@870 289 newline,
adamc@870 290 box [string "PQfinish(conn);",
adamc@870 291 newline,
adamc@870 292 string "uw_error(ctx, FATAL, \"Out of memory allocating query result.\");",
adamc@870 293 newline],
adamc@870 294 string "}",
adamc@870 295 newline,
adamc@870 296 newline,
adamc@870 297 string "if (PQresultStatus(res) != PGRES_TUPLES_OK) {",
adamc@870 298 newline,
adamc@870 299 box [string "char msg[1024];",
adamc@870 300 newline,
adamc@870 301 string "strncpy(msg, PQerrorMessage(conn), 1024);",
adamc@870 302 newline,
adamc@870 303 string "msg[1023] = 0;",
adamc@870 304 newline,
adamc@870 305 string "PQclear(res);",
adamc@870 306 newline,
adamc@870 307 string "PQfinish(conn);",
adamc@870 308 newline,
adamc@870 309 string "uw_error(ctx, FATAL, \"Query failed:\\n",
adamc@870 310 string q,
adamc@870 311 string "\\n%s\", msg);",
adamc@870 312 newline],
adamc@870 313 string "}",
adamc@870 314 newline,
adamc@870 315 newline,
adamc@870 316 string "if (strcmp(PQgetvalue(res, 0, 0), \"1\")) {",
adamc@870 317 newline,
adamc@870 318 box [string "PQclear(res);",
adamc@870 319 newline,
adamc@870 320 string "PQfinish(conn);",
adamc@870 321 newline,
adamc@870 322 string "uw_error(ctx, FATAL, \"Sequence '",
adamc@870 323 string s,
adamc@870 324 string "' does not exist.\");",
adamc@870 325 newline],
adamc@870 326 string "}",
adamc@870 327 newline,
adamc@870 328 newline,
adamc@870 329 string "PQclear(res);",
adamc@870 330 newline]
adamc@870 331 end) sequences,
adamc@870 332
adamc@870 333 string "}",
adamc@870 334
adamc@870 335 string "static void uw_db_prepare(uw_context ctx) {",
adamc@866 336 newline,
adamc@866 337 string "PGconn *conn = uw_get_db(ctx);",
adamc@866 338 newline,
adamc@866 339 string "PGresult *res;",
adamc@866 340 newline,
adamc@866 341 newline,
adamc@866 342
adamc@866 343 p_list_sepi newline (fn i => fn (s, n) =>
adamc@866 344 box [string "res = PQprepare(conn, \"uw",
adamc@866 345 string (Int.toString i),
adamc@866 346 string "\", \"",
adam@1656 347 string (Prim.toCString s),
adamc@866 348 string "\", ",
adamc@866 349 string (Int.toString n),
adamc@866 350 string ", NULL);",
adamc@866 351 newline,
adamc@866 352 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adamc@866 353 newline,
adamc@866 354 box [string "char msg[1024];",
adamc@866 355 newline,
adamc@866 356 string "strncpy(msg, PQerrorMessage(conn), 1024);",
adamc@866 357 newline,
adamc@866 358 string "msg[1023] = 0;",
adamc@866 359 newline,
adamc@866 360 string "PQclear(res);",
adamc@866 361 newline,
adamc@866 362 string "PQfinish(conn);",
adamc@866 363 newline,
adamc@866 364 string "uw_error(ctx, FATAL, \"Unable to create prepared statement:\\n",
adam@1656 365 string (Prim.toCString s),
adamc@866 366 string "\\n%s\", msg);",
adamc@866 367 newline],
adamc@866 368 string "}",
adamc@866 369 newline,
adamc@866 370 string "PQclear(res);",
adamc@866 371 newline])
adamc@866 372 ss,
adamc@866 373
adamc@866 374 string "}",
adamc@866 375 newline,
adamc@866 376 newline]
adamc@866 377 else
adamc@870 378 box [string "static void uw_db_validate(uw_context ctx) { }",
adamc@870 379 newline,
adamc@870 380 string "static void uw_db_prepare(uw_context ctx) { }"],
adamc@870 381
adamc@1094 382 string "static void uw_client_init(void) {",
adamc@1094 383 newline,
adamc@1094 384 box [string "uw_sqlfmtInt = \"%lld::int8%n\";",
adamc@1094 385 newline,
adam@1920 386 string "uw_sqlfmtFloat = \"%.16g::float8%n\";",
adamc@1094 387 newline,
adamc@1094 388 string "uw_Estrings = 1;",
adamc@1094 389 newline,
adam@1834 390 string "uw_sql_type_annotations = 1;",
adam@1834 391 newline,
adamc@1094 392 string "uw_sqlsuffixString = \"::text\";",
adamc@1094 393 newline,
adamc@1094 394 string "uw_sqlsuffixChar = \"::char\";",
adamc@1094 395 newline,
adamc@1094 396 string "uw_sqlsuffixBlob = \"::bytea\";",
adamc@1094 397 newline,
adamc@1094 398 string "uw_sqlfmtUint4 = \"%u::int4%n\";",
adamc@1094 399 newline],
adamc@1094 400 string "}",
adamc@866 401 newline,
adamc@866 402 newline,
adamc@866 403
adamc@1094 404 string "static void uw_db_close(uw_context ctx) {",
adamc@1094 405 newline,
adamc@1094 406 string "PQfinish(uw_get_db(ctx));",
adamc@1094 407 newline,
adamc@1094 408 string "}",
adamc@1094 409 newline,
adamc@1094 410 newline,
adamc@1094 411
adam@1936 412 string "static int uw_db_begin(uw_context ctx, int could_write) {",
adamc@1094 413 newline,
adamc@1094 414 string "PGconn *conn = uw_get_db(ctx);",
adamc@1094 415 newline,
adam@1936 416 string "PGresult *res = PQexec(conn, could_write ? \"BEGIN ISOLATION LEVEL SERIALIZABLE\" : \"BEGIN ISOLATION LEVEL SERIALIZABLE, READ ONLY\");",
adamc@1094 417 newline,
adamc@1094 418 newline,
adamc@1094 419 string "if (res == NULL) return 1;",
adamc@1094 420 newline,
adamc@1094 421 newline,
adamc@1094 422 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adamc@1094 423 box [string "PQclear(res);",
adamc@1094 424 newline,
adamc@1094 425 string "return 1;",
adamc@1094 426 newline],
adamc@1094 427 string "}",
adamc@1094 428 newline,
adamc@1144 429 string "PQclear(res);",
adamc@1144 430 newline,
adamc@1094 431 string "return 0;",
adamc@1094 432 newline,
adamc@1094 433 string "}",
adamc@1094 434 newline,
adamc@1094 435 newline,
adamc@1094 436
adamc@1094 437 string "static int uw_db_commit(uw_context ctx) {",
adamc@1094 438 newline,
adamc@1094 439 string "PGconn *conn = uw_get_db(ctx);",
adamc@1094 440 newline,
adamc@1094 441 string "PGresult *res = PQexec(conn, \"COMMIT\");",
adamc@1094 442 newline,
adamc@1094 443 newline,
adamc@1094 444 string "if (res == NULL) return 1;",
adamc@1094 445 newline,
adamc@1094 446 newline,
adamc@1094 447 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adam@1938 448 box [string "if (!strcmp(PQresultErrorField(res, PG_DIAG_SQLSTATE), \"40001\")) {",
adam@1938 449 box [newline,
adam@1938 450 string "PQclear(res);",
adam@1938 451 newline,
adam@1938 452 string "return -1;",
adam@1938 453 newline],
adam@1938 454 string "}",
adam@1938 455 newline,
adam@1938 456 string "if (!strcmp(PQresultErrorField(res, PG_DIAG_SQLSTATE), \"40P01\")) {",
adam@1938 457 box [newline,
adam@1938 458 string "PQclear(res);",
adam@1938 459 newline,
adam@1938 460 string "return -1;",
adam@1938 461 newline],
adam@1938 462 string "}",
adam@1938 463 newline,
adam@1938 464 string "PQclear(res);",
adamc@1094 465 newline,
adamc@1094 466 string "return 1;",
adamc@1094 467 newline],
adamc@1094 468 string "}",
adamc@1094 469 newline,
adamc@1144 470 string "PQclear(res);",
adamc@1144 471 newline,
adamc@1094 472 string "return 0;",
adamc@1094 473 newline,
adamc@1094 474 string "}",
adamc@1094 475 newline,
adamc@1094 476 newline,
adamc@1094 477
adamc@1094 478 string "static int uw_db_rollback(uw_context ctx) {",
adamc@1094 479 newline,
adamc@1094 480 string "PGconn *conn = uw_get_db(ctx);",
adamc@1094 481 newline,
adamc@1094 482 string "PGresult *res = PQexec(conn, \"ROLLBACK\");",
adamc@1094 483 newline,
adamc@1094 484 newline,
adamc@1094 485 string "if (res == NULL) return 1;",
adamc@1094 486 newline,
adamc@1094 487 newline,
adamc@1094 488 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adamc@1094 489 box [string "PQclear(res);",
adamc@1094 490 newline,
adamc@1094 491 string "return 1;",
adamc@1094 492 newline],
adamc@1094 493 string "}",
adamc@1094 494 newline,
adamc@1144 495 string "PQclear(res);",
adamc@1144 496 newline,
adamc@1094 497 string "return 0;",
adamc@1094 498 newline,
adamc@1094 499 string "}",
adamc@1094 500
adamc@1094 501 newline,
adamc@1094 502 newline,
adamc@1094 503
adamc@1094 504 string "static void uw_db_init(uw_context ctx) {",
adamc@866 505 newline,
as@1564 506 string "char *env_db_str = getenv(\"URWEB_PQ_CON\");",
as@1564 507 newline,
as@1564 508 string "PGconn *conn = PQconnectdb(env_db_str == NULL ? \"",
adam@1656 509 string (Prim.toCString dbstring),
as@1564 510 string "\" : env_db_str);",
adamc@866 511 newline,
adamc@866 512 string "if (conn == NULL) uw_error(ctx, FATAL, ",
adamc@866 513 string "\"libpq can't allocate a connection.\");",
adamc@866 514 newline,
adamc@866 515 string "if (PQstatus(conn) != CONNECTION_OK) {",
adamc@866 516 newline,
adamc@866 517 box [string "char msg[1024];",
adamc@866 518 newline,
adamc@866 519 string "strncpy(msg, PQerrorMessage(conn), 1024);",
adamc@866 520 newline,
adamc@866 521 string "msg[1023] = 0;",
adamc@866 522 newline,
adamc@866 523 string "PQfinish(conn);",
adamc@866 524 newline,
adamc@866 525 string "uw_error(ctx, BOUNDED_RETRY, ",
adamc@866 526 string "\"Connection to Postgres server failed: %s\", msg);"],
adamc@866 527 newline,
adamc@866 528 string "}",
adamc@866 529 newline,
adamc@866 530 string "uw_set_db(ctx, conn);",
adamc@866 531 newline,
adamc@866 532 string "uw_db_validate(ctx);",
adamc@866 533 newline,
adamc@866 534 string "uw_db_prepare(ctx);",
adamc@866 535 newline,
adamc@866 536 string "}"]
adamc@866 537
adamc@880 538 fun p_getcol {loc, wontLeakStrings, col = i, typ = t} =
adamc@867 539 let
adamc@867 540 fun p_unsql t e eLen =
adamc@867 541 case t of
adamc@867 542 Int => box [string "uw_Basis_stringToInt_error(ctx, ", e, string ")"]
adamc@867 543 | Float => box [string "uw_Basis_stringToFloat_error(ctx, ", e, string ")"]
adamc@867 544 | String =>
adamc@867 545 if wontLeakStrings then
adamc@867 546 e
adamc@867 547 else
adamc@867 548 box [string "uw_strdup(ctx, ", e, string ")"]
adamc@1011 549 | Char => box [e, string "[0]"]
adamc@867 550 | Bool => box [string "uw_Basis_stringToBool_error(ctx, ", e, string ")"]
adamc@939 551 | Time => box [string "uw_Basis_unsqlTime(ctx, ", e, string ")"]
adamc@867 552 | Blob => box [string "uw_Basis_stringToBlob_error(ctx, ",
adamc@867 553 e,
adamc@867 554 string ", ",
adamc@867 555 eLen,
adamc@867 556 string ")"]
adamc@867 557 | Channel => box [string "uw_Basis_stringToChannel_error(ctx, ", e, string ")"]
adamc@867 558 | Client => box [string "uw_Basis_stringToClient_error(ctx, ", e, string ")"]
adamc@867 559
adamc@867 560 | Nullable _ => raise Fail "Postgres: Recursive Nullable"
adamc@867 561
adamc@867 562 fun getter t =
adamc@867 563 case t of
adamc@867 564 Nullable t =>
adamc@867 565 box [string "(PQgetisnull(res, i, ",
adamc@867 566 string (Int.toString i),
adamc@867 567 string ") ? NULL : ",
adamc@867 568 case t of
adamc@867 569 String => getter t
adamc@867 570 | _ => box [string "({",
adamc@867 571 newline,
adamc@874 572 string (p_sql_ctype t),
adamc@867 573 space,
adamc@867 574 string "*tmp = uw_malloc(ctx, sizeof(",
adamc@874 575 string (p_sql_ctype t),
adamc@867 576 string "));",
adamc@867 577 newline,
adamc@867 578 string "*tmp = ",
adamc@867 579 getter t,
adamc@867 580 string ";",
adamc@867 581 newline,
adamc@867 582 string "tmp;",
adamc@867 583 newline,
adamc@867 584 string "})"],
adamc@867 585 string ")"]
adamc@867 586 | _ =>
adamc@867 587 box [string "(PQgetisnull(res, i, ",
adamc@867 588 string (Int.toString i),
adamc@867 589 string ") ? ",
adamc@867 590 box [string "({",
adamc@874 591 string (p_sql_ctype t),
adamc@867 592 space,
adamc@867 593 string "tmp;",
adamc@867 594 newline,
adamc@880 595 string "uw_error(ctx, FATAL, \"",
adamc@880 596 string (ErrorMsg.spanToString loc),
adamc@880 597 string ": Unexpectedly NULL field #",
adamc@867 598 string (Int.toString i),
adamc@867 599 string "\");",
adamc@867 600 newline,
adamc@867 601 string "tmp;",
adamc@867 602 newline,
adamc@867 603 string "})"],
adamc@867 604 string " : ",
adamc@867 605 p_unsql t
adamc@867 606 (box [string "PQgetvalue(res, i, ",
adamc@867 607 string (Int.toString i),
adamc@867 608 string ")"])
adamc@867 609 (box [string "PQgetlength(res, i, ",
adamc@867 610 string (Int.toString i),
adamc@867 611 string ")"]),
adamc@867 612 string ")"]
adamc@867 613 in
adamc@867 614 getter t
adamc@867 615 end
adamc@867 616
adamc@873 617 fun queryCommon {loc, query, cols, doCols} =
adamc@867 618 box [string "int n, i;",
adamc@867 619 newline,
adamc@867 620 newline,
adamc@867 621
adamc@867 622 string "if (res == NULL) uw_error(ctx, FATAL, \"Out of memory allocating query result.\");",
adamc@867 623 newline,
adamc@867 624 newline,
adamc@867 625
adamc@867 626 string "if (PQresultStatus(res) != PGRES_TUPLES_OK) {",
adamc@867 627 newline,
adam@1918 628 box [string "if (!strcmp(PQresultErrorField(res, PG_DIAG_SQLSTATE), \"40001\")) {",
adam@1918 629 box [newline,
adam@1918 630 string "PQclear(res);",
adam@1918 631 newline,
adam@1918 632 string "uw_error(ctx, UNLIMITED_RETRY, \"Serialization failure\");",
adam@1918 633 newline],
adam@1918 634 string "}",
adam@1918 635 newline,
adam@1918 636 string "if (!strcmp(PQresultErrorField(res, PG_DIAG_SQLSTATE), \"40P01\")) {",
adam@1918 637 box [newline,
adam@1918 638 string "PQclear(res);",
adam@1918 639 newline,
adam@1918 640 string "uw_error(ctx, UNLIMITED_RETRY, \"Deadlock detected\");",
adam@1918 641 newline],
adam@1918 642 string "}",
adam@1918 643 newline,
adam@1918 644 string "PQclear(res);",
adamc@867 645 newline,
adamc@867 646 string "uw_error(ctx, FATAL, \"",
adamc@867 647 string (ErrorMsg.spanToString loc),
adamc@867 648 string ": Query failed:\\n%s\\n%s\", ",
adamc@867 649 query,
adamc@867 650 string ", PQerrorMessage(conn));",
adamc@867 651 newline],
adamc@867 652 string "}",
adamc@867 653 newline,
adamc@867 654 newline,
adamc@867 655
adamc@867 656 string "if (PQnfields(res) != ",
adamc@873 657 string (Int.toString (length cols)),
adamc@867 658 string ") {",
adamc@867 659 newline,
adamc@867 660 box [string "int nf = PQnfields(res);",
adamc@867 661 newline,
adamc@867 662 string "PQclear(res);",
adamc@867 663 newline,
adamc@867 664 string "uw_error(ctx, FATAL, \"",
adamc@867 665 string (ErrorMsg.spanToString loc),
adamc@867 666 string ": Query returned %d columns instead of ",
adamc@873 667 string (Int.toString (length cols)),
adamc@867 668 string ":\\n%s\\n%s\", nf, ",
adamc@867 669 query,
adamc@867 670 string ", PQerrorMessage(conn));",
adamc@867 671 newline],
adamc@867 672 string "}",
adamc@867 673 newline,
adamc@867 674 newline,
adamc@867 675
adamc@867 676 string "uw_end_region(ctx);",
adamc@867 677 newline,
adamc@867 678 string "uw_push_cleanup(ctx, (void (*)(void *))PQclear, res);",
adamc@867 679 newline,
adamc@867 680 string "n = PQntuples(res);",
adamc@867 681 newline,
adamc@867 682 string "for (i = 0; i < n; ++i) {",
adamc@867 683 newline,
adamc@867 684 doCols p_getcol,
adamc@867 685 string "}",
adamc@867 686 newline,
adamc@867 687 newline,
adamc@867 688 string "uw_pop_cleanup(ctx);",
adam@1682 689 newline]
adamc@867 690
adamc@873 691 fun query {loc, cols, doCols} =
adamc@867 692 box [string "PGconn *conn = uw_get_db(ctx);",
adamc@867 693 newline,
adamc@867 694 string "PGresult *res = PQexecParams(conn, query, 0, NULL, NULL, NULL, NULL, 0);",
adamc@867 695 newline,
adamc@867 696 newline,
adamc@873 697 queryCommon {loc = loc, cols = cols, doCols = doCols, query = string "query"}]
adamc@867 698
adamc@867 699 fun p_ensql t e =
adamc@867 700 case t of
adamc@867 701 Int => box [string "uw_Basis_attrifyInt(ctx, ", e, string ")"]
adamc@867 702 | Float => box [string "uw_Basis_attrifyFloat(ctx, ", e, string ")"]
adamc@867 703 | String => e
adamc@1011 704 | Char => box [string "uw_Basis_attrifyChar(ctx, ", e, string ")"]
adamc@867 705 | Bool => box [string "(", e, string " ? \"TRUE\" : \"FALSE\")"]
adam@1364 706 | Time => box [string "uw_Basis_ensqlTime(ctx, ", e, string ")"]
adamc@867 707 | Blob => box [e, string ".data"]
adamc@867 708 | Channel => box [string "uw_Basis_attrifyChannel(ctx, ", e, string ")"]
adamc@867 709 | Client => box [string "uw_Basis_attrifyClient(ctx, ", e, string ")"]
adamc@867 710 | Nullable String => e
adamc@867 711 | Nullable t => box [string "(",
adamc@867 712 e,
adamc@867 713 string " == NULL ? NULL : ",
adamc@867 714 p_ensql t (box [string "(*", e, string ")"]),
adamc@867 715 string ")"]
adamc@867 716
adam@1431 717 fun makeParams inputs =
adam@1431 718 box [string "static const int paramFormats[] = { ",
adamc@867 719 p_list_sep (box [string ",", space])
adamc@867 720 (fn t => if isBlob t then string "1" else string "0") inputs,
adamc@867 721 string " };",
adamc@867 722 newline,
adam@1431 723 if List.exists isBlob inputs then
adam@1650 724 box [string "int *paramLengths = uw_malloc(ctx, ",
adam@1431 725 string (Int.toString (length inputs)),
adam@1431 726 string " * sizeof(int));",
adam@1431 727 newline,
adam@1431 728 p_list_sepi (box [])
adam@1431 729 (fn i => fn t =>
adam@1431 730 box [string "paramLengths[",
adam@1431 731 string (Int.toString i),
adam@1431 732 string "] = ",
adam@1431 733 case t of
adam@1431 734 Blob => string ("arg" ^ Int.toString (i + 1) ^ ".size")
adam@1431 735 | Nullable Blob => string ("arg" ^ Int.toString (i + 1)
adam@1431 736 ^ "?arg" ^ Int.toString (i + 1) ^ "->size:0")
adam@1431 737 | _ => string "0",
adam@1431 738 string ";",
adam@1431 739 newline]) inputs,
adam@1431 740 newline]
adam@1431 741 else
adam@1431 742 box [string "const int *paramLengths = paramFormats;",
adam@1431 743 newline],
adam@1431 744
adam@1431 745 string "const char **paramValues = uw_malloc(ctx, ",
adam@1431 746 string (Int.toString (length inputs)),
adam@1431 747 string " * sizeof(char*));",
adamc@867 748 newline,
adam@1431 749 p_list_sepi (box [])
adam@1431 750 (fn i => fn t => box [string "paramValues[",
adam@1431 751 string (Int.toString i),
adam@1431 752 string "] = ",
adam@1431 753 p_ensql t (box [string "arg",
adam@1431 754 string (Int.toString (i + 1))]),
adam@1431 755 string ";",
adam@1431 756 newline])
adamc@867 757 inputs,
adam@1431 758 newline]
adam@1431 759
adam@1431 760 fun queryPrepared {loc, id, query, inputs, cols, doCols, nested = _} =
adam@1431 761 box [string "PGconn *conn = uw_get_db(ctx);",
adamc@867 762 newline,
adam@1431 763
adam@1431 764 makeParams inputs,
adam@1431 765
adamc@867 766 newline,
adamc@867 767 string "PGresult *res = ",
adamc@867 768 if #persistent (Settings.currentProtocol ()) then
adamc@867 769 box [string "PQexecPrepared(conn, \"uw",
adamc@867 770 string (Int.toString id),
adamc@867 771 string "\", ",
adamc@867 772 string (Int.toString (length inputs)),
adamc@867 773 string ", paramValues, paramLengths, paramFormats, 0);"]
adamc@867 774 else
adamc@867 775 box [string "PQexecParams(conn, \"",
adam@1656 776 string (Prim.toCString query),
adamc@867 777 string "\", ",
adamc@867 778 string (Int.toString (length inputs)),
adamc@867 779 string ", NULL, paramValues, paramLengths, paramFormats, 0);"],
adamc@867 780 newline,
adamc@867 781 newline,
adamc@873 782 queryCommon {loc = loc, cols = cols, doCols = doCols, query = box [string "\"",
adam@1656 783 string (Prim.toCString query),
adamc@873 784 string "\""]}]
adamc@867 785
adam@1293 786 fun dmlCommon {loc, dml, mode} =
adamc@868 787 box [string "if (res == NULL) uw_error(ctx, FATAL, \"Out of memory allocating DML result.\");",
adamc@868 788 newline,
adamc@868 789 newline,
adamc@868 790
adamc@868 791 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adamc@868 792 newline,
adamc@868 793 box [string "if (!strcmp(PQresultErrorField(res, PG_DIAG_SQLSTATE), \"40001\")) {",
adamc@868 794 box [newline,
adamc@868 795 string "PQclear(res);",
adamc@868 796 newline,
adamc@868 797 string "uw_error(ctx, UNLIMITED_RETRY, \"Serialization failure\");",
adamc@868 798 newline],
adamc@868 799 string "}",
adamc@868 800 newline,
adam@1550 801 string "if (!strcmp(PQresultErrorField(res, PG_DIAG_SQLSTATE), \"40P01\")) {",
adam@1550 802 box [newline,
adam@1550 803 string "PQclear(res);",
adam@1550 804 newline,
adam@1550 805 string "uw_error(ctx, UNLIMITED_RETRY, \"Deadlock detected\");",
adam@1550 806 newline],
adam@1550 807 string "}",
adam@1550 808 newline,
adam@1293 809 case mode of
adam@1918 810 Settings.Error => box [string "PQclear(res);",
adam@1293 811 newline,
adam@1293 812 string "uw_error(ctx, FATAL, \"",
adam@1293 813 string (ErrorMsg.spanToString loc),
adam@1918 814 string ": DML failed:\\n%s\\n%s\", ",
adam@1293 815 dml,
adam@1918 816 string ", PQerrorMessage(conn));"]
adam@1295 817 | Settings.None => box [string "uw_set_error_message(ctx, PQerrorMessage(conn));",
adam@1295 818 newline,
adam@1295 819 newline,
adam@1295 820
adam@1295 821 string "res = PQexec(conn, \"ROLLBACK TO s\");",
adam@1295 822 newline,
adam@1295 823 string "if (res == NULL) uw_error(ctx, FATAL, \"Out of memory allocating DML result.\");",
adam@1295 824 newline,
adam@1295 825 newline,
adam@1295 826
adam@1295 827 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adam@1295 828 newline,
adam@1295 829 box [string "PQclear(res);",
adam@1295 830 newline,
adam@1295 831 string "uw_error(ctx, FATAL, \"",
adam@1295 832 string (ErrorMsg.spanToString loc),
adam@1295 833 string ": ROLLBACK TO failed:\\n%s\\n%s\", ",
adam@1295 834 dml,
adam@1295 835 string ", PQerrorMessage(conn));",
adam@1295 836 newline,
adam@1295 837 string "}"],
adam@1295 838 newline,
adam@1295 839
adam@1295 840 string "PQclear(res);",
adam@1295 841 newline],
adamc@868 842 newline],
adamc@868 843 string "}",
adamc@868 844
adam@1295 845 case mode of
adam@1295 846 Error => box [newline,
adam@1295 847 newline,
adam@1295 848 string "PQclear(res);",
adam@1295 849 newline]
adam@1295 850 | None => box[string " else {",
adam@1295 851 newline,
adam@1295 852 box [string "PQclear(res);",
adam@1295 853 newline,
adam@1295 854 string "res = PQexec(conn, \"RELEASE s\");",
adam@1295 855 newline,
adam@1295 856 string "if (res == NULL) uw_error(ctx, FATAL, \"Out of memory allocating DML result.\");",
adam@1295 857 newline,
adam@1295 858 newline,
adam@1295 859
adam@1295 860 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adam@1295 861 newline,
adam@1295 862 box [string "PQclear(res);",
adam@1295 863 newline,
adam@1295 864 string "uw_error(ctx, FATAL, \"",
adam@1295 865 string (ErrorMsg.spanToString loc),
adam@1295 866 string ": RELEASE failed:\\n%s\\n%s\", ",
adam@1295 867 dml,
adam@1295 868 string ", PQerrorMessage(conn));",
adam@1295 869 newline],
adam@1295 870 string "}",
adam@1295 871 newline,
adam@1295 872 string "PQclear(res);",
adam@1295 873 newline],
adam@1295 874 string "}",
adam@1295 875 newline]]
adam@1295 876
adam@1295 877 fun makeSavepoint mode =
adam@1295 878 case mode of
adam@1295 879 Error => box []
adam@1295 880 | None => box [string "res = PQexec(conn, \"SAVEPOINT s\");",
adam@1295 881 newline,
adam@1295 882 string "if (res == NULL) uw_error(ctx, FATAL, \"Out of memory allocating DML result.\");",
adam@1295 883 newline,
adam@1295 884 newline,
adam@1295 885 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adam@1295 886 box [newline,
adam@1295 887 string "PQclear(res);",
adam@1295 888 newline,
adam@1295 889 string "uw_error(ctx, FATAL, \"Error creating SAVEPOINT\");",
adam@1295 890 newline],
adam@1295 891 string "}",
adam@1295 892 newline,
adam@1295 893 string "PQclear(res);",
adam@1295 894 newline,
adam@1295 895 newline]
adamc@868 896
adam@1293 897 fun dml (loc, mode) =
adamc@868 898 box [string "PGconn *conn = uw_get_db(ctx);",
adamc@868 899 newline,
adam@1295 900 string "PGresult *res;",
adam@1295 901 newline,
adam@1295 902
adam@1295 903 makeSavepoint mode,
adam@1295 904
adam@1295 905 string "res = PQexecParams(conn, dml, 0, NULL, NULL, NULL, NULL, 0);",
adamc@868 906 newline,
adamc@868 907 newline,
adam@1293 908 dmlCommon {loc = loc, dml = string "dml", mode = mode}]
adamc@868 909
adam@1293 910 fun dmlPrepared {loc, id, dml, inputs, mode} =
adamc@868 911 box [string "PGconn *conn = uw_get_db(ctx);",
adamc@868 912 newline,
adam@1431 913
adam@1431 914 makeParams inputs,
adam@1431 915
adamc@868 916 newline,
adam@1295 917 string "PGresult *res;",
adam@1295 918 newline,
adam@1295 919 newline,
adam@1295 920
adam@1295 921 makeSavepoint mode,
adam@1295 922
adam@1295 923 string "res = ",
adamc@868 924 if #persistent (Settings.currentProtocol ()) then
adamc@868 925 box [string "PQexecPrepared(conn, \"uw",
adamc@868 926 string (Int.toString id),
adamc@868 927 string "\", ",
adamc@868 928 string (Int.toString (length inputs)),
adamc@868 929 string ", paramValues, paramLengths, paramFormats, 0);"]
adamc@868 930 else
adamc@868 931 box [string "PQexecParams(conn, \"",
adam@1656 932 string (Prim.toCString dml),
adamc@868 933 string "\", ",
adamc@868 934 string (Int.toString (length inputs)),
adamc@868 935 string ", NULL, paramValues, paramLengths, paramFormats, 0);"],
adamc@868 936 newline,
adamc@868 937 newline,
adamc@868 938 dmlCommon {loc = loc, dml = box [string "\"",
adam@1656 939 string (Prim.toCString dml),
adam@1293 940 string "\""], mode = mode}]
adamc@868 941
adamc@869 942 fun nextvalCommon {loc, query} =
adamc@869 943 box [string "if (res == NULL) uw_error(ctx, FATAL, \"Out of memory allocating nextval result.\");",
adamc@869 944 newline,
adamc@869 945 newline,
adamc@869 946
adamc@869 947 string "if (PQresultStatus(res) != PGRES_TUPLES_OK) {",
adamc@869 948 newline,
adamc@869 949 box [string "PQclear(res);",
adamc@869 950 newline,
adamc@869 951 string "uw_error(ctx, FATAL, \"",
adamc@869 952 string (ErrorMsg.spanToString loc),
adamc@869 953 string ": Query failed:\\n%s\\n%s\", ",
adamc@869 954 query,
adamc@869 955 string ", PQerrorMessage(conn));",
adamc@869 956 newline],
adamc@869 957 string "}",
adamc@869 958 newline,
adamc@869 959 newline,
adamc@869 960
adamc@869 961 string "n = PQntuples(res);",
adamc@869 962 newline,
adamc@869 963 string "if (n != 1) {",
adamc@869 964 newline,
adamc@869 965 box [string "PQclear(res);",
adamc@869 966 newline,
adamc@869 967 string "uw_error(ctx, FATAL, \"",
adamc@869 968 string (ErrorMsg.spanToString loc),
adamc@869 969 string ": Wrong number of result rows:\\n%s\\n%s\", ",
adamc@869 970 query,
adamc@869 971 string ", PQerrorMessage(conn));",
adamc@869 972 newline],
adamc@869 973 string "}",
adamc@869 974 newline,
adamc@869 975 newline,
adamc@869 976
adamc@869 977 string "n = uw_Basis_stringToInt_error(ctx, PQgetvalue(res, 0, 0));",
adamc@869 978 newline,
adamc@869 979 string "PQclear(res);",
adamc@869 980 newline]
adamc@869 981
adamc@878 982 open Cjr
adamc@878 983
adamc@878 984 fun nextval {loc, seqE, seqName} =
adamc@878 985 let
adamc@878 986 val query = case seqName of
adamc@878 987 SOME s =>
adamc@879 988 string ("\"SELECT NEXTVAL('" ^ s ^ "')\"")
adamc@878 989 | _ => box [string "uw_Basis_strcat(ctx, \"SELECT NEXTVAL('\", uw_Basis_strcat(ctx, ",
adamc@878 990 seqE,
adamc@878 991 string ", \"')\"))"]
adamc@878 992 in
adamc@878 993 box [string "char *query = ",
adamc@878 994 query,
adamc@878 995 string ";",
adamc@878 996 newline,
adamc@878 997 string "PGconn *conn = uw_get_db(ctx);",
adamc@878 998 newline,
adamc@878 999 string "PGresult *res = PQexecParams(conn, query, 0, NULL, NULL, NULL, NULL, 0);",
adamc@878 1000 newline,
adamc@878 1001 newline,
adamc@878 1002 nextvalCommon {loc = loc, query = string "query"}]
adamc@878 1003 end
adamc@869 1004
adamc@869 1005 fun nextvalPrepared {loc, id, query} =
adamc@869 1006 box [string "PGconn *conn = uw_get_db(ctx);",
adamc@869 1007 newline,
adamc@869 1008 newline,
adamc@869 1009 string "PGresult *res = ",
adamc@869 1010 if #persistent (Settings.currentProtocol ()) then
adamc@869 1011 box [string "PQexecPrepared(conn, \"uw",
adamc@869 1012 string (Int.toString id),
adamc@869 1013 string "\", 0, NULL, NULL, NULL, 0);"]
adamc@869 1014 else
adamc@869 1015 box [string "PQexecParams(conn, \"",
adam@1656 1016 string (Prim.toCString query),
adamc@869 1017 string "\", 0, NULL, NULL, NULL, NULL, 0);"],
adamc@869 1018 newline,
adamc@869 1019 newline,
adamc@869 1020 nextvalCommon {loc = loc, query = box [string "\"",
adam@1656 1021 string (Prim.toCString query),
adamc@869 1022 string "\""]}]
adamc@869 1023
adamc@1073 1024 fun setvalCommon {loc, query} =
adamc@1073 1025 box [string "if (res == NULL) uw_error(ctx, FATAL, \"Out of memory allocating setval result.\");",
adamc@1073 1026 newline,
adamc@1073 1027 newline,
adamc@1073 1028
adamc@1073 1029 string "if (PQresultStatus(res) != PGRES_TUPLES_OK) {",
adamc@1073 1030 newline,
adamc@1073 1031 box [string "PQclear(res);",
adamc@1073 1032 newline,
adamc@1073 1033 string "uw_error(ctx, FATAL, \"",
adamc@1073 1034 string (ErrorMsg.spanToString loc),
adamc@1073 1035 string ": Query failed:\\n%s\\n%s\", ",
adamc@1073 1036 query,
adamc@1073 1037 string ", PQerrorMessage(conn));",
adamc@1073 1038 newline],
adamc@1073 1039 string "}",
adamc@1073 1040 newline,
adamc@1073 1041 newline,
adamc@1073 1042
adamc@1073 1043 string "PQclear(res);",
adamc@1073 1044 newline]
adamc@1073 1045
adamc@1073 1046 fun setval {loc, seqE, count} =
adamc@1073 1047 let
adamc@1073 1048 val query = box [string "uw_Basis_strcat(ctx, \"SELECT SETVAL('\", uw_Basis_strcat(ctx, ",
adamc@1073 1049 seqE,
adamc@1073 1050 string ", uw_Basis_strcat(ctx, \"', \", uw_Basis_strcat(ctx, uw_Basis_sqlifyInt(ctx, ",
adamc@1073 1051 count,
adamc@1073 1052 string "), \")\"))))"]
adamc@1073 1053 in
adamc@1073 1054 box [string "char *query = ",
adamc@1073 1055 query,
adamc@1073 1056 string ";",
adamc@1073 1057 newline,
adamc@1073 1058 string "PGconn *conn = uw_get_db(ctx);",
adamc@1073 1059 newline,
adamc@1073 1060 string "PGresult *res = PQexecParams(conn, query, 0, NULL, NULL, NULL, NULL, 0);",
adamc@1073 1061 newline,
adamc@1073 1062 newline,
adamc@1073 1063 setvalCommon {loc = loc, query = string "query"}]
adamc@1073 1064 end
adamc@1073 1065
adamc@874 1066 fun sqlifyString s = "E'" ^ String.translate (fn #"'" => "\\'"
adamc@874 1067 | #"\\" => "\\\\"
adamc@874 1068 | ch =>
adamc@874 1069 if Char.isPrint ch then
adamc@874 1070 str ch
adamc@874 1071 else
adamc@874 1072 "\\" ^ StringCvt.padLeft #"0" 3
adamc@874 1073 (Int.fmt StringCvt.OCT (ord ch)))
adam@1656 1074 (Prim.toCString s) ^ "'::text"
adamc@874 1075
adamc@874 1076 fun p_cast (s, t) = s ^ "::" ^ p_sql_type t
adamc@874 1077
adamc@874 1078 fun p_blank (n, t) = p_cast ("$" ^ Int.toString n, t)
adamc@874 1079
adamc@866 1080 val () = addDbms {name = "postgres",
adam@1682 1081 randomFunction = "RANDOM",
adam@1464 1082 header = Config.pgheader,
adamc@866 1083 link = "-lpq",
adamc@873 1084 p_sql_type = p_sql_type,
adamc@867 1085 init = init,
adamc@867 1086 query = query,
adamc@868 1087 queryPrepared = queryPrepared,
adamc@868 1088 dml = dml,
adamc@869 1089 dmlPrepared = dmlPrepared,
adamc@869 1090 nextval = nextval,
adamc@874 1091 nextvalPrepared = nextvalPrepared,
adamc@1073 1092 setval = setval,
adamc@874 1093 sqlifyString = sqlifyString,
adamc@874 1094 p_cast = p_cast,
adamc@874 1095 p_blank = p_blank,
adamc@877 1096 supportsDeleteAs = true,
adamc@886 1097 supportsUpdateAs = true,
adamc@877 1098 createSequence = fn s => "CREATE SEQUENCE " ^ s,
adamc@878 1099 textKeysNeedLengths = false,
adamc@879 1100 supportsNextval = true,
adamc@882 1101 supportsNestedPrepared = true,
adamc@890 1102 sqlPrefix = "",
adamc@1014 1103 supportsOctetLength = true,
adamc@1014 1104 trueString = "TRUE",
adamc@1196 1105 falseString = "FALSE",
adamc@1196 1106 onlyUnion = false,
adam@1777 1107 nestedRelops = true,
adam@1777 1108 windowFunctions = true}
adamc@874 1109
adamc@866 1110 val () = setDbms "postgres"
adamc@866 1111
adamc@866 1112 end