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annotate src/postgres.sml @ 2186:d87d72b6e299

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Remove spurious failure about reopening database connection
author Adam Chlipala <adam@chlipala.net>
date Sat, 31 Oct 2015 19:21:05 -0400
parents 00cf8214c2e3
children 251dd276f45f
rev   line source
adam@2177 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@1958 71 val q = "SELECT COUNT(*) FROM information_schema." ^ table ^ " WHERE 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
adam@2103 343 p_list_sepi newline (fn i => fn (s, _) =>
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),
adam@2103 348 string "\", 0, NULL);",
adamc@866 349 newline,
adamc@866 350 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adamc@866 351 newline,
adamc@866 352 box [string "char msg[1024];",
adamc@866 353 newline,
adamc@866 354 string "strncpy(msg, PQerrorMessage(conn), 1024);",
adamc@866 355 newline,
adamc@866 356 string "msg[1023] = 0;",
adamc@866 357 newline,
adamc@866 358 string "PQclear(res);",
adamc@866 359 newline,
adamc@866 360 string "PQfinish(conn);",
adamc@866 361 newline,
adamc@866 362 string "uw_error(ctx, FATAL, \"Unable to create prepared statement:\\n",
adam@1656 363 string (Prim.toCString s),
adamc@866 364 string "\\n%s\", msg);",
adamc@866 365 newline],
adamc@866 366 string "}",
adamc@866 367 newline,
adamc@866 368 string "PQclear(res);",
adamc@866 369 newline])
adamc@866 370 ss,
adamc@866 371
adamc@866 372 string "}",
adamc@866 373 newline,
adamc@866 374 newline]
adamc@866 375 else
adamc@870 376 box [string "static void uw_db_validate(uw_context ctx) { }",
adamc@870 377 newline,
adamc@870 378 string "static void uw_db_prepare(uw_context ctx) { }"],
adamc@870 379
adamc@1094 380 string "static void uw_client_init(void) {",
adamc@1094 381 newline,
adamc@1094 382 box [string "uw_sqlfmtInt = \"%lld::int8%n\";",
adamc@1094 383 newline,
adam@1920 384 string "uw_sqlfmtFloat = \"%.16g::float8%n\";",
adamc@1094 385 newline,
adamc@1094 386 string "uw_Estrings = 1;",
adamc@1094 387 newline,
adam@1834 388 string "uw_sql_type_annotations = 1;",
adam@1834 389 newline,
adamc@1094 390 string "uw_sqlsuffixString = \"::text\";",
adamc@1094 391 newline,
adamc@1094 392 string "uw_sqlsuffixChar = \"::char\";",
adamc@1094 393 newline,
adamc@1094 394 string "uw_sqlsuffixBlob = \"::bytea\";",
adamc@1094 395 newline,
adamc@1094 396 string "uw_sqlfmtUint4 = \"%u::int4%n\";",
adamc@1094 397 newline],
adamc@1094 398 string "}",
adamc@866 399 newline,
adamc@866 400 newline,
adamc@866 401
adamc@1094 402 string "static void uw_db_close(uw_context ctx) {",
adamc@1094 403 newline,
adamc@1094 404 string "PQfinish(uw_get_db(ctx));",
adamc@1094 405 newline,
adamc@1094 406 string "}",
adamc@1094 407 newline,
adamc@1094 408 newline,
adamc@1094 409
adam@1936 410 string "static int uw_db_begin(uw_context ctx, int could_write) {",
adamc@1094 411 newline,
adamc@1094 412 string "PGconn *conn = uw_get_db(ctx);",
adamc@1094 413 newline,
adam@1936 414 string "PGresult *res = PQexec(conn, could_write ? \"BEGIN ISOLATION LEVEL SERIALIZABLE\" : \"BEGIN ISOLATION LEVEL SERIALIZABLE, READ ONLY\");",
adamc@1094 415 newline,
adamc@1094 416 newline,
adamc@1094 417 string "if (res == NULL) return 1;",
adamc@1094 418 newline,
adamc@1094 419 newline,
adamc@1094 420 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adamc@1094 421 box [string "PQclear(res);",
adamc@1094 422 newline,
adamc@1094 423 string "return 1;",
adamc@1094 424 newline],
adamc@1094 425 string "}",
adamc@1094 426 newline,
adamc@1144 427 string "PQclear(res);",
adamc@1144 428 newline,
adamc@1094 429 string "return 0;",
adamc@1094 430 newline,
adamc@1094 431 string "}",
adamc@1094 432 newline,
adamc@1094 433 newline,
adamc@1094 434
adamc@1094 435 string "static int uw_db_commit(uw_context ctx) {",
adamc@1094 436 newline,
adamc@1094 437 string "PGconn *conn = uw_get_db(ctx);",
adamc@1094 438 newline,
adamc@1094 439 string "PGresult *res = PQexec(conn, \"COMMIT\");",
adamc@1094 440 newline,
adamc@1094 441 newline,
adamc@1094 442 string "if (res == NULL) return 1;",
adamc@1094 443 newline,
adamc@1094 444 newline,
adamc@1094 445 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adam@1938 446 box [string "if (!strcmp(PQresultErrorField(res, PG_DIAG_SQLSTATE), \"40001\")) {",
adam@1938 447 box [newline,
adam@1938 448 string "PQclear(res);",
adam@1938 449 newline,
adam@1938 450 string "return -1;",
adam@1938 451 newline],
adam@1938 452 string "}",
adam@1938 453 newline,
adam@1938 454 string "if (!strcmp(PQresultErrorField(res, PG_DIAG_SQLSTATE), \"40P01\")) {",
adam@1938 455 box [newline,
adam@1938 456 string "PQclear(res);",
adam@1938 457 newline,
adam@1938 458 string "return -1;",
adam@1938 459 newline],
adam@1938 460 string "}",
adam@1938 461 newline,
adam@1938 462 string "PQclear(res);",
adamc@1094 463 newline,
adamc@1094 464 string "return 1;",
adamc@1094 465 newline],
adamc@1094 466 string "}",
adamc@1094 467 newline,
adamc@1144 468 string "PQclear(res);",
adamc@1144 469 newline,
adamc@1094 470 string "return 0;",
adamc@1094 471 newline,
adamc@1094 472 string "}",
adamc@1094 473 newline,
adamc@1094 474 newline,
adamc@1094 475
adamc@1094 476 string "static int uw_db_rollback(uw_context ctx) {",
adamc@1094 477 newline,
adamc@1094 478 string "PGconn *conn = uw_get_db(ctx);",
adamc@1094 479 newline,
adamc@1094 480 string "PGresult *res = PQexec(conn, \"ROLLBACK\");",
adamc@1094 481 newline,
adamc@1094 482 newline,
adamc@1094 483 string "if (res == NULL) return 1;",
adamc@1094 484 newline,
adamc@1094 485 newline,
adamc@1094 486 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adamc@1094 487 box [string "PQclear(res);",
adamc@1094 488 newline,
adamc@1094 489 string "return 1;",
adamc@1094 490 newline],
adamc@1094 491 string "}",
adamc@1094 492 newline,
adamc@1144 493 string "PQclear(res);",
adamc@1144 494 newline,
adamc@1094 495 string "return 0;",
adamc@1094 496 newline,
adamc@1094 497 string "}",
adamc@1094 498
adamc@1094 499 newline,
adamc@1094 500 newline,
adamc@1094 501
adamc@1094 502 string "static void uw_db_init(uw_context ctx) {",
adamc@866 503 newline,
as@1564 504 string "char *env_db_str = getenv(\"URWEB_PQ_CON\");",
as@1564 505 newline,
as@1564 506 string "PGconn *conn = PQconnectdb(env_db_str == NULL ? \"",
adam@1656 507 string (Prim.toCString dbstring),
as@1564 508 string "\" : env_db_str);",
adamc@866 509 newline,
adamc@866 510 string "if (conn == NULL) uw_error(ctx, FATAL, ",
adamc@866 511 string "\"libpq can't allocate a connection.\");",
adamc@866 512 newline,
adamc@866 513 string "if (PQstatus(conn) != CONNECTION_OK) {",
adamc@866 514 newline,
adamc@866 515 box [string "char msg[1024];",
adamc@866 516 newline,
adamc@866 517 string "strncpy(msg, PQerrorMessage(conn), 1024);",
adamc@866 518 newline,
adamc@866 519 string "msg[1023] = 0;",
adamc@866 520 newline,
adamc@866 521 string "PQfinish(conn);",
adamc@866 522 newline,
adam@2177 523 string "uw_error(ctx, BOUNDED_RETRY, ",
adamc@866 524 string "\"Connection to Postgres server failed: %s\", msg);"],
adamc@866 525 newline,
adamc@866 526 string "}",
adamc@866 527 newline,
adamc@866 528 string "uw_set_db(ctx, conn);",
adamc@866 529 newline,
adamc@866 530 string "uw_db_validate(ctx);",
adamc@866 531 newline,
adamc@866 532 string "uw_db_prepare(ctx);",
adamc@866 533 newline,
adamc@866 534 string "}"]
adamc@866 535
adamc@880 536 fun p_getcol {loc, wontLeakStrings, col = i, typ = t} =
adamc@867 537 let
adamc@867 538 fun p_unsql t e eLen =
adamc@867 539 case t of
adamc@867 540 Int => box [string "uw_Basis_stringToInt_error(ctx, ", e, string ")"]
adamc@867 541 | Float => box [string "uw_Basis_stringToFloat_error(ctx, ", e, string ")"]
adamc@867 542 | String =>
adamc@867 543 if wontLeakStrings then
adamc@867 544 e
adamc@867 545 else
adamc@867 546 box [string "uw_strdup(ctx, ", e, string ")"]
adamc@1011 547 | Char => box [e, string "[0]"]
adamc@867 548 | Bool => box [string "uw_Basis_stringToBool_error(ctx, ", e, string ")"]
adamc@939 549 | Time => box [string "uw_Basis_unsqlTime(ctx, ", e, string ")"]
adamc@867 550 | Blob => box [string "uw_Basis_stringToBlob_error(ctx, ",
adamc@867 551 e,
adamc@867 552 string ", ",
adamc@867 553 eLen,
adamc@867 554 string ")"]
adamc@867 555 | Channel => box [string "uw_Basis_stringToChannel_error(ctx, ", e, string ")"]
adamc@867 556 | Client => box [string "uw_Basis_stringToClient_error(ctx, ", e, string ")"]
adamc@867 557
adamc@867 558 | Nullable _ => raise Fail "Postgres: Recursive Nullable"
adamc@867 559
adamc@867 560 fun getter t =
adamc@867 561 case t of
adamc@867 562 Nullable t =>
adamc@867 563 box [string "(PQgetisnull(res, i, ",
adamc@867 564 string (Int.toString i),
adamc@867 565 string ") ? NULL : ",
adamc@867 566 case t of
adamc@867 567 String => getter t
adamc@867 568 | _ => box [string "({",
adamc@867 569 newline,
adamc@874 570 string (p_sql_ctype t),
adamc@867 571 space,
adamc@867 572 string "*tmp = uw_malloc(ctx, sizeof(",
adamc@874 573 string (p_sql_ctype t),
adamc@867 574 string "));",
adamc@867 575 newline,
adamc@867 576 string "*tmp = ",
adamc@867 577 getter t,
adamc@867 578 string ";",
adamc@867 579 newline,
adamc@867 580 string "tmp;",
adamc@867 581 newline,
adamc@867 582 string "})"],
adamc@867 583 string ")"]
adamc@867 584 | _ =>
adamc@867 585 box [string "(PQgetisnull(res, i, ",
adamc@867 586 string (Int.toString i),
adamc@867 587 string ") ? ",
adamc@867 588 box [string "({",
adamc@874 589 string (p_sql_ctype t),
adamc@867 590 space,
adamc@867 591 string "tmp;",
adamc@867 592 newline,
adamc@880 593 string "uw_error(ctx, FATAL, \"",
adamc@880 594 string (ErrorMsg.spanToString loc),
adamc@880 595 string ": Unexpectedly NULL field #",
adamc@867 596 string (Int.toString i),
adamc@867 597 string "\");",
adamc@867 598 newline,
adamc@867 599 string "tmp;",
adamc@867 600 newline,
adamc@867 601 string "})"],
adamc@867 602 string " : ",
adamc@867 603 p_unsql t
adamc@867 604 (box [string "PQgetvalue(res, i, ",
adamc@867 605 string (Int.toString i),
adamc@867 606 string ")"])
adamc@867 607 (box [string "PQgetlength(res, i, ",
adamc@867 608 string (Int.toString i),
adamc@867 609 string ")"]),
adamc@867 610 string ")"]
adamc@867 611 in
adamc@867 612 getter t
adamc@867 613 end
adamc@867 614
adam@2177 615 fun queryCommon {loc, query, cols, doCols} =
adamc@867 616 box [string "int n, i;",
adamc@867 617 newline,
adamc@867 618 newline,
adamc@867 619
adam@2176 620 string "if (res == NULL) {",
adam@2176 621 box [newline,
adam@2177 622 string "uw_try_reconnecting_and_restarting(ctx);",
adam@2176 623 newline,
adam@2177 624 string "uw_error(ctx, FATAL, \"Can't allocate query result; database server may be down.\");",
adam@2176 625 newline],
adam@2176 626 string "}",
adamc@867 627 newline,
adamc@867 628 newline,
adamc@867 629
adamc@867 630 string "if (PQresultStatus(res) != PGRES_TUPLES_OK) {",
adamc@867 631 newline,
adam@1918 632 box [string "if (!strcmp(PQresultErrorField(res, PG_DIAG_SQLSTATE), \"40001\")) {",
adam@1918 633 box [newline,
adam@1918 634 string "PQclear(res);",
adam@1918 635 newline,
adam@1918 636 string "uw_error(ctx, UNLIMITED_RETRY, \"Serialization failure\");",
adam@1918 637 newline],
adam@1918 638 string "}",
adam@1918 639 newline,
adam@1918 640 string "if (!strcmp(PQresultErrorField(res, PG_DIAG_SQLSTATE), \"40P01\")) {",
adam@1918 641 box [newline,
adam@1918 642 string "PQclear(res);",
adam@1918 643 newline,
adam@1918 644 string "uw_error(ctx, UNLIMITED_RETRY, \"Deadlock detected\");",
adam@1918 645 newline],
adam@1918 646 string "}",
adam@1918 647 newline,
adam@1918 648 string "PQclear(res);",
adamc@867 649 newline,
adamc@867 650 string "uw_error(ctx, FATAL, \"",
adamc@867 651 string (ErrorMsg.spanToString loc),
adamc@867 652 string ": Query failed:\\n%s\\n%s\", ",
adamc@867 653 query,
adamc@867 654 string ", PQerrorMessage(conn));",
adamc@867 655 newline],
adamc@867 656 string "}",
adamc@867 657 newline,
adamc@867 658 newline,
adamc@867 659
adamc@867 660 string "if (PQnfields(res) != ",
adamc@873 661 string (Int.toString (length cols)),
adamc@867 662 string ") {",
adamc@867 663 newline,
adamc@867 664 box [string "int nf = PQnfields(res);",
adamc@867 665 newline,
adamc@867 666 string "PQclear(res);",
adamc@867 667 newline,
adamc@867 668 string "uw_error(ctx, FATAL, \"",
adamc@867 669 string (ErrorMsg.spanToString loc),
adamc@867 670 string ": Query returned %d columns instead of ",
adamc@873 671 string (Int.toString (length cols)),
adamc@867 672 string ":\\n%s\\n%s\", nf, ",
adamc@867 673 query,
adamc@867 674 string ", PQerrorMessage(conn));",
adamc@867 675 newline],
adamc@867 676 string "}",
adamc@867 677 newline,
adamc@867 678 newline,
adamc@867 679
adamc@867 680 string "uw_end_region(ctx);",
adamc@867 681 newline,
adamc@867 682 string "uw_push_cleanup(ctx, (void (*)(void *))PQclear, res);",
adamc@867 683 newline,
adamc@867 684 string "n = PQntuples(res);",
adamc@867 685 newline,
adamc@867 686 string "for (i = 0; i < n; ++i) {",
adamc@867 687 newline,
adamc@867 688 doCols p_getcol,
adamc@867 689 string "}",
adamc@867 690 newline,
adamc@867 691 newline,
adamc@867 692 string "uw_pop_cleanup(ctx);",
adam@1682 693 newline]
adamc@867 694
adamc@873 695 fun query {loc, cols, doCols} =
adam@2177 696 box [string "PGconn *conn = uw_get_db(ctx);",
adam@2177 697 newline,
adam@2177 698 string "PGresult *res = PQexecParams(conn, query, 0, NULL, NULL, NULL, NULL, 0);",
adam@2177 699 newline,
adam@2177 700 newline,
adam@2177 701 queryCommon {loc = loc, cols = cols, doCols = doCols, query = string "query"}]
adamc@867 702
adamc@867 703 fun p_ensql t e =
adamc@867 704 case t of
adamc@867 705 Int => box [string "uw_Basis_attrifyInt(ctx, ", e, string ")"]
adamc@867 706 | Float => box [string "uw_Basis_attrifyFloat(ctx, ", e, string ")"]
adamc@867 707 | String => e
adamc@1011 708 | Char => box [string "uw_Basis_attrifyChar(ctx, ", e, string ")"]
adamc@867 709 | Bool => box [string "(", e, string " ? \"TRUE\" : \"FALSE\")"]
adam@1364 710 | Time => box [string "uw_Basis_ensqlTime(ctx, ", e, string ")"]
adamc@867 711 | Blob => box [e, string ".data"]
adamc@867 712 | Channel => box [string "uw_Basis_attrifyChannel(ctx, ", e, string ")"]
adamc@867 713 | Client => box [string "uw_Basis_attrifyClient(ctx, ", e, string ")"]
adamc@867 714 | Nullable String => e
adamc@867 715 | Nullable t => box [string "(",
adamc@867 716 e,
adamc@867 717 string " == NULL ? NULL : ",
adamc@867 718 p_ensql t (box [string "(*", e, string ")"]),
adamc@867 719 string ")"]
adamc@867 720
adam@1431 721 fun makeParams inputs =
adam@1431 722 box [string "static const int paramFormats[] = { ",
adamc@867 723 p_list_sep (box [string ",", space])
adamc@867 724 (fn t => if isBlob t then string "1" else string "0") inputs,
adamc@867 725 string " };",
adamc@867 726 newline,
adam@1431 727 if List.exists isBlob inputs then
adam@1650 728 box [string "int *paramLengths = uw_malloc(ctx, ",
adam@1431 729 string (Int.toString (length inputs)),
adam@1431 730 string " * sizeof(int));",
adam@1431 731 newline,
adam@1431 732 p_list_sepi (box [])
adam@1431 733 (fn i => fn t =>
adam@1431 734 box [string "paramLengths[",
adam@1431 735 string (Int.toString i),
adam@1431 736 string "] = ",
adam@1431 737 case t of
adam@1431 738 Blob => string ("arg" ^ Int.toString (i + 1) ^ ".size")
adam@1431 739 | Nullable Blob => string ("arg" ^ Int.toString (i + 1)
adam@1431 740 ^ "?arg" ^ Int.toString (i + 1) ^ "->size:0")
adam@1431 741 | _ => string "0",
adam@1431 742 string ";",
adam@1431 743 newline]) inputs,
adam@1431 744 newline]
adam@1431 745 else
adam@1431 746 box [string "const int *paramLengths = paramFormats;",
adam@1431 747 newline],
adam@1431 748
adam@1431 749 string "const char **paramValues = uw_malloc(ctx, ",
adam@1431 750 string (Int.toString (length inputs)),
adam@1431 751 string " * sizeof(char*));",
adamc@867 752 newline,
adam@1431 753 p_list_sepi (box [])
adam@1431 754 (fn i => fn t => box [string "paramValues[",
adam@1431 755 string (Int.toString i),
adam@1431 756 string "] = ",
adam@1431 757 p_ensql t (box [string "arg",
adam@1431 758 string (Int.toString (i + 1))]),
adam@1431 759 string ";",
adam@1431 760 newline])
adamc@867 761 inputs,
adam@1431 762 newline]
adam@1431 763
adam@1431 764 fun queryPrepared {loc, id, query, inputs, cols, doCols, nested = _} =
adam@2177 765 box [string "PGconn *conn = uw_get_db(ctx);",
adam@2177 766 newline,
adam@1431 767
adam@2177 768 makeParams inputs,
adam@2177 769
adam@2177 770 newline,
adam@2177 771 string "PGresult *res = ",
adam@2177 772 if #persistent (Settings.currentProtocol ()) then
adam@2177 773 box [string "PQexecPrepared(conn, \"uw",
adam@2177 774 string (Int.toString id),
adam@2177 775 string "\", ",
adam@2177 776 string (Int.toString (length inputs)),
adam@2177 777 string ", paramValues, paramLengths, paramFormats, 0);"]
adam@2177 778 else
adam@2177 779 box [string "PQexecParams(conn, \"",
adam@2177 780 string (Prim.toCString query),
adam@2177 781 string "\", ",
adam@2177 782 string (Int.toString (length inputs)),
adam@2177 783 string ", NULL, paramValues, paramLengths, paramFormats, 0);"],
adam@2177 784 newline,
adam@2177 785 newline,
adam@2177 786 queryCommon {loc = loc, cols = cols, doCols = doCols, query = box [string "\"",
adam@2177 787 string (Prim.toCString query),
adam@2177 788 string "\""]}]
adam@2177 789
adam@2177 790 fun dmlCommon {loc, dml, mode} =
adam@2176 791 box [string "if (res == NULL) {",
adam@2176 792 box [newline,
adam@2177 793 string "uw_try_reconnecting_and_restarting(ctx);",
adam@2176 794 newline,
adam@2177 795 string "uw_error(ctx, FATAL, \"Can't allocate DML result; database server may be down.\");",
adam@2176 796 newline],
adam@2176 797 string "}",
adamc@868 798 newline,
adamc@868 799 newline,
adamc@868 800
adamc@868 801 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adamc@868 802 newline,
adamc@868 803 box [string "if (!strcmp(PQresultErrorField(res, PG_DIAG_SQLSTATE), \"40001\")) {",
adamc@868 804 box [newline,
adamc@868 805 string "PQclear(res);",
adamc@868 806 newline,
adamc@868 807 string "uw_error(ctx, UNLIMITED_RETRY, \"Serialization failure\");",
adamc@868 808 newline],
adamc@868 809 string "}",
adamc@868 810 newline,
adam@1550 811 string "if (!strcmp(PQresultErrorField(res, PG_DIAG_SQLSTATE), \"40P01\")) {",
adam@1550 812 box [newline,
adam@1550 813 string "PQclear(res);",
adam@1550 814 newline,
adam@1550 815 string "uw_error(ctx, UNLIMITED_RETRY, \"Deadlock detected\");",
adam@1550 816 newline],
adam@1550 817 string "}",
adam@1550 818 newline,
adam@1293 819 case mode of
adam@1918 820 Settings.Error => box [string "PQclear(res);",
adam@1293 821 newline,
adam@1293 822 string "uw_error(ctx, FATAL, \"",
adam@1293 823 string (ErrorMsg.spanToString loc),
adam@1918 824 string ": DML failed:\\n%s\\n%s\", ",
adam@1293 825 dml,
adam@1918 826 string ", PQerrorMessage(conn));"]
adam@1295 827 | Settings.None => box [string "uw_set_error_message(ctx, PQerrorMessage(conn));",
adam@1295 828 newline,
adam@1295 829 newline,
adam@1295 830
adam@1295 831 string "res = PQexec(conn, \"ROLLBACK TO s\");",
adam@1295 832 newline,
adam@2176 833 string "if (res == NULL) {",
adam@2176 834 box [newline,
adam@2177 835 string "uw_try_reconnecting_and_restarting(ctx);",
adam@2177 836 newline,
adam@2177 837 string "uw_error(ctx, FATAL, \"Can't allocate DML ROLLBACK result; database server may be down.\");",
adam@2176 838 newline],
adam@2176 839 string "}",
adam@1295 840 newline,
adam@1295 841 newline,
adam@1295 842
adam@1295 843 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adam@1295 844 newline,
adam@1295 845 box [string "PQclear(res);",
adam@1295 846 newline,
adam@1295 847 string "uw_error(ctx, FATAL, \"",
adam@1295 848 string (ErrorMsg.spanToString loc),
adam@1295 849 string ": ROLLBACK TO failed:\\n%s\\n%s\", ",
adam@1295 850 dml,
adam@1295 851 string ", PQerrorMessage(conn));",
adam@1295 852 newline,
adam@1295 853 string "}"],
adam@1295 854 newline,
adam@1295 855
adam@1295 856 string "PQclear(res);",
adam@1295 857 newline],
adamc@868 858 newline],
adamc@868 859 string "}",
adamc@868 860
adam@1295 861 case mode of
adam@1295 862 Error => box [newline,
adam@1295 863 newline,
adam@1295 864 string "PQclear(res);",
adam@1295 865 newline]
adam@1295 866 | None => box[string " else {",
adam@1295 867 newline,
adam@1295 868 box [string "PQclear(res);",
adam@1295 869 newline,
adam@1295 870 string "res = PQexec(conn, \"RELEASE s\");",
adam@1295 871 newline,
adam@2177 872 string "if (res == NULL) {",
adam@2177 873 box [newline,
adam@2177 874 string "uw_try_reconnecting_and_restarting(ctx);",
adam@2177 875 newline,
adam@2177 876 string "uw_error(ctx, FATAL, \"Can't allocate DML RELEASE result; database server may be down.\");",
adam@2177 877 newline],
adam@2177 878 string "}",
adam@1295 879 newline,
adam@1295 880 newline,
adam@1295 881
adam@1295 882 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adam@1295 883 newline,
adam@1295 884 box [string "PQclear(res);",
adam@1295 885 newline,
adam@1295 886 string "uw_error(ctx, FATAL, \"",
adam@1295 887 string (ErrorMsg.spanToString loc),
adam@1295 888 string ": RELEASE failed:\\n%s\\n%s\", ",
adam@1295 889 dml,
adam@1295 890 string ", PQerrorMessage(conn));",
adam@1295 891 newline],
adam@1295 892 string "}",
adam@1295 893 newline,
adam@1295 894 string "PQclear(res);",
adam@1295 895 newline],
adam@1295 896 string "}",
adam@1295 897 newline]]
adam@1295 898
adam@1295 899 fun makeSavepoint mode =
adam@1295 900 case mode of
adam@1295 901 Error => box []
adam@1295 902 | None => box [string "res = PQexec(conn, \"SAVEPOINT s\");",
adam@1295 903 newline,
adam@2177 904 string "if (res == NULL) {",
adam@2177 905 box [newline,
adam@2177 906 string "uw_try_reconnecting_and_restarting(ctx);",
adam@2177 907 newline,
adam@2177 908 string "uw_error(ctx, FATAL, \"Can't allocate DML SAVEPOINT result; database server may be down.\");",
adam@2177 909 newline],
adam@2177 910 string "}",
adam@1295 911 newline,
adam@1295 912 newline,
adam@1295 913 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adam@1295 914 box [newline,
adam@1295 915 string "PQclear(res);",
adam@1295 916 newline,
adam@1295 917 string "uw_error(ctx, FATAL, \"Error creating SAVEPOINT\");",
adam@1295 918 newline],
adam@1295 919 string "}",
adam@1295 920 newline,
adam@1295 921 string "PQclear(res);",
adam@1295 922 newline,
adam@1295 923 newline]
adamc@868 924
adam@1293 925 fun dml (loc, mode) =
adam@2177 926 box [string "PGconn *conn = uw_get_db(ctx);",
adam@2177 927 newline,
adam@2177 928 string "PGresult *res;",
adam@2177 929 newline,
adam@1295 930
adam@2177 931 makeSavepoint mode,
adam@1295 932
adam@2177 933 string "res = PQexecParams(conn, dml, 0, NULL, NULL, NULL, NULL, 0);",
adam@2177 934 newline,
adam@2177 935 newline,
adam@2177 936 dmlCommon {loc = loc, dml = string "dml", mode = mode}]
adamc@868 937
adam@1293 938 fun dmlPrepared {loc, id, dml, inputs, mode} =
adam@2177 939 box [string "PGconn *conn = uw_get_db(ctx);",
adam@2177 940 newline,
adam@1431 941
adam@2177 942 makeParams inputs,
adam@1431 943
adam@2177 944 newline,
adam@2177 945 string "PGresult *res;",
adam@2177 946 newline,
adam@2177 947 newline,
adam@1295 948
adam@2177 949 makeSavepoint mode,
adam@1295 950
adam@2177 951 string "res = ",
adam@2177 952 if #persistent (Settings.currentProtocol ()) then
adam@2177 953 box [string "PQexecPrepared(conn, \"uw",
adam@2177 954 string (Int.toString id),
adam@2177 955 string "\", ",
adam@2177 956 string (Int.toString (length inputs)),
adam@2177 957 string ", paramValues, paramLengths, paramFormats, 0);"]
adam@2177 958 else
adam@2177 959 box [string "PQexecParams(conn, \"",
adam@2177 960 string (Prim.toCString dml),
adam@2177 961 string "\", ",
adam@2177 962 string (Int.toString (length inputs)),
adam@2177 963 string ", NULL, paramValues, paramLengths, paramFormats, 0);"],
adam@2177 964 newline,
adam@2177 965 newline,
adam@2177 966 dmlCommon {loc = loc, dml = box [string "\"",
adam@2177 967 string (Prim.toCString dml),
adam@2177 968 string "\""], mode = mode}]
adamc@868 969
adam@2177 970 fun nextvalCommon {loc, query} =
adam@2176 971 box [string "if (res == NULL) {",
adam@2176 972 box [newline,
adam@2177 973 string "uw_try_reconnecting_and_restarting(ctx);",
adam@2176 974 newline,
adam@2177 975 string "uw_error(ctx, FATAL, \"Can't allocate NEXTVAL result; database server may be down.\");",
adam@2176 976 newline],
adam@2176 977 string "}",
adamc@869 978 newline,
adamc@869 979 newline,
adamc@869 980
adamc@869 981 string "if (PQresultStatus(res) != PGRES_TUPLES_OK) {",
adamc@869 982 newline,
adamc@869 983 box [string "PQclear(res);",
adamc@869 984 newline,
adamc@869 985 string "uw_error(ctx, FATAL, \"",
adamc@869 986 string (ErrorMsg.spanToString loc),
adamc@869 987 string ": Query failed:\\n%s\\n%s\", ",
adamc@869 988 query,
adamc@869 989 string ", PQerrorMessage(conn));",
adamc@869 990 newline],
adamc@869 991 string "}",
adamc@869 992 newline,
adamc@869 993 newline,
adamc@869 994
adamc@869 995 string "n = PQntuples(res);",
adamc@869 996 newline,
adamc@869 997 string "if (n != 1) {",
adamc@869 998 newline,
adamc@869 999 box [string "PQclear(res);",
adamc@869 1000 newline,
adamc@869 1001 string "uw_error(ctx, FATAL, \"",
adamc@869 1002 string (ErrorMsg.spanToString loc),
adamc@869 1003 string ": Wrong number of result rows:\\n%s\\n%s\", ",
adamc@869 1004 query,
adamc@869 1005 string ", PQerrorMessage(conn));",
adamc@869 1006 newline],
adamc@869 1007 string "}",
adamc@869 1008 newline,
adamc@869 1009 newline,
adamc@869 1010
adamc@869 1011 string "n = uw_Basis_stringToInt_error(ctx, PQgetvalue(res, 0, 0));",
adamc@869 1012 newline,
adamc@869 1013 string "PQclear(res);",
adamc@869 1014 newline]
adamc@869 1015
adamc@878 1016 open Cjr
adamc@878 1017
adamc@878 1018 fun nextval {loc, seqE, seqName} =
adamc@878 1019 let
adamc@878 1020 val query = case seqName of
adamc@878 1021 SOME s =>
adamc@879 1022 string ("\"SELECT NEXTVAL('" ^ s ^ "')\"")
adamc@878 1023 | _ => box [string "uw_Basis_strcat(ctx, \"SELECT NEXTVAL('\", uw_Basis_strcat(ctx, ",
adamc@878 1024 seqE,
adamc@878 1025 string ", \"')\"))"]
adamc@878 1026 in
adamc@878 1027 box [string "char *query = ",
adamc@878 1028 query,
adamc@878 1029 string ";",
adamc@878 1030 newline,
adamc@878 1031 string "PGconn *conn = uw_get_db(ctx);",
adamc@878 1032 newline,
adam@2177 1033 string "PGresult *res = PQexecParams(conn, query, 0, NULL, NULL, NULL, NULL, 0);",
adamc@878 1034 newline,
adamc@878 1035 newline,
adam@2177 1036 nextvalCommon {loc = loc, query = string "query"}]
adamc@878 1037 end
adamc@869 1038
adamc@869 1039 fun nextvalPrepared {loc, id, query} =
adam@2177 1040 box [string "PGconn *conn = uw_get_db(ctx);",
adam@2177 1041 newline,
adam@2177 1042 newline,
adam@2177 1043 string "PGresult *res = ",
adam@2177 1044 if #persistent (Settings.currentProtocol ()) then
adam@2177 1045 box [string "PQexecPrepared(conn, \"uw",
adam@2177 1046 string (Int.toString id),
adam@2177 1047 string "\", 0, NULL, NULL, NULL, 0);"]
adam@2177 1048 else
adam@2177 1049 box [string "PQexecParams(conn, \"",
adam@2177 1050 string (Prim.toCString query),
adam@2177 1051 string "\", 0, NULL, NULL, NULL, NULL, 0);"],
adam@2177 1052 newline,
adam@2177 1053 newline,
adam@2177 1054 nextvalCommon {loc = loc, query = box [string "\"",
adam@2177 1055 string (Prim.toCString query),
adam@2177 1056 string "\""]}]
adamc@869 1057
adam@2177 1058 fun setvalCommon {loc, query} =
adam@2176 1059 box [string "if (res == NULL) {",
adam@2176 1060 box [newline,
adam@2177 1061 string "uw_try_reconnecting_and_restarting(ctx);",
adam@2176 1062 newline,
adam@2177 1063 string "uw_error(ctx, FATAL, \"Can't allocate SETVAL result; database server may be down.\");",
adam@2176 1064 newline],
adam@2176 1065 string "}",
adamc@1073 1066 newline,
adamc@1073 1067 newline,
adamc@1073 1068
adamc@1073 1069 string "if (PQresultStatus(res) != PGRES_TUPLES_OK) {",
adamc@1073 1070 newline,
adamc@1073 1071 box [string "PQclear(res);",
adamc@1073 1072 newline,
adamc@1073 1073 string "uw_error(ctx, FATAL, \"",
adamc@1073 1074 string (ErrorMsg.spanToString loc),
adamc@1073 1075 string ": Query failed:\\n%s\\n%s\", ",
adamc@1073 1076 query,
adamc@1073 1077 string ", PQerrorMessage(conn));",
adamc@1073 1078 newline],
adamc@1073 1079 string "}",
adamc@1073 1080 newline,
adamc@1073 1081 newline,
adamc@1073 1082
adamc@1073 1083 string "PQclear(res);",
adamc@1073 1084 newline]
adamc@1073 1085
adamc@1073 1086 fun setval {loc, seqE, count} =
adamc@1073 1087 let
adamc@1073 1088 val query = box [string "uw_Basis_strcat(ctx, \"SELECT SETVAL('\", uw_Basis_strcat(ctx, ",
adamc@1073 1089 seqE,
adamc@1073 1090 string ", uw_Basis_strcat(ctx, \"', \", uw_Basis_strcat(ctx, uw_Basis_sqlifyInt(ctx, ",
adamc@1073 1091 count,
adamc@1073 1092 string "), \")\"))))"]
adamc@1073 1093 in
adamc@1073 1094 box [string "char *query = ",
adamc@1073 1095 query,
adamc@1073 1096 string ";",
adamc@1073 1097 newline,
adamc@1073 1098 string "PGconn *conn = uw_get_db(ctx);",
adamc@1073 1099 newline,
adam@2177 1100 string "PGresult *res = PQexecParams(conn, query, 0, NULL, NULL, NULL, NULL, 0);",
adamc@1073 1101 newline,
adamc@1073 1102 newline,
adam@2177 1103 setvalCommon {loc = loc, query = string "query"}]
adamc@1073 1104 end
adamc@1073 1105
adamc@874 1106 fun sqlifyString s = "E'" ^ String.translate (fn #"'" => "\\'"
adamc@874 1107 | #"\\" => "\\\\"
adamc@874 1108 | ch =>
adamc@874 1109 if Char.isPrint ch then
adamc@874 1110 str ch
adamc@874 1111 else
adamc@874 1112 "\\" ^ StringCvt.padLeft #"0" 3
adamc@874 1113 (Int.fmt StringCvt.OCT (ord ch)))
adam@1656 1114 (Prim.toCString s) ^ "'::text"
adamc@874 1115
adamc@874 1116 fun p_cast (s, t) = s ^ "::" ^ p_sql_type t
adamc@874 1117
adamc@874 1118 fun p_blank (n, t) = p_cast ("$" ^ Int.toString n, t)
adamc@874 1119
adamc@866 1120 val () = addDbms {name = "postgres",
adam@1682 1121 randomFunction = "RANDOM",
adam@1464 1122 header = Config.pgheader,
adamc@866 1123 link = "-lpq",
adamc@873 1124 p_sql_type = p_sql_type,
adamc@867 1125 init = init,
adamc@867 1126 query = query,
adamc@868 1127 queryPrepared = queryPrepared,
adamc@868 1128 dml = dml,
adamc@869 1129 dmlPrepared = dmlPrepared,
adamc@869 1130 nextval = nextval,
adamc@874 1131 nextvalPrepared = nextvalPrepared,
adamc@1073 1132 setval = setval,
adamc@874 1133 sqlifyString = sqlifyString,
adamc@874 1134 p_cast = p_cast,
adamc@874 1135 p_blank = p_blank,
adamc@877 1136 supportsDeleteAs = true,
adamc@886 1137 supportsUpdateAs = true,
adamc@877 1138 createSequence = fn s => "CREATE SEQUENCE " ^ s,
adamc@878 1139 textKeysNeedLengths = false,
adamc@879 1140 supportsNextval = true,
adamc@882 1141 supportsNestedPrepared = true,
adamc@890 1142 sqlPrefix = "",
adamc@1014 1143 supportsOctetLength = true,
adamc@1014 1144 trueString = "TRUE",
adamc@1196 1145 falseString = "FALSE",
adamc@1196 1146 onlyUnion = false,
adam@1777 1147 nestedRelops = true,
adam@1777 1148 windowFunctions = true}
adamc@874 1149
adamc@866 1150 val () = setDbms "postgres"
adamc@866 1151
adamc@866 1152 end