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Module system tutorial
author Adam Chlipala <adam@chlipala.net>
date Sat, 16 Jul 2011 11:48:11 -0400
parents 969b90b1f2f9
children daf71c76707e
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
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@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
adamc@871 66
adamc@872 67 val q = "SELECT COUNT(*) FROM information_schema." ^ table ^ " WHERE table_name = '"
adamc@871 68 ^ sl ^ "'"
adamc@871 69
adamc@871 70 val q' = String.concat ["SELECT COUNT(*) FROM information_schema.columns WHERE table_name = '",
adamc@871 71 sl,
adamc@871 72 "' AND (",
adamc@871 73 String.concatWith " OR "
adamc@871 74 (map (fn (x, t) =>
adamc@871 75 String.concat ["(column_name = 'uw_",
adamc@871 76 CharVector.map
adamc@871 77 Char.toLower (ident x),
adam@1428 78 (case p_sql_type_base t of
adam@1428 79 "bigint" =>
adam@1428 80 "' AND data_type IN ('bigint', 'numeric')"
adam@1428 81 | t =>
adam@1428 82 String.concat ["' AND data_type = '",
adam@1428 83 t,
adam@1428 84 "'"]),
adamc@872 85 if checkNullable then
adamc@872 86 (" AND is_nullable = '"
adamc@872 87 ^ (if isNotNull t then
adamc@872 88 "NO"
adamc@872 89 else
adamc@872 90 "YES")
adamc@872 91 ^ "'")
adamc@871 92 else
adamc@872 93 "",
adamc@872 94 ")"]) xts),
adamc@871 95 ")"]
adamc@871 96
adamc@871 97 val q'' = String.concat ["SELECT COUNT(*) FROM information_schema.columns WHERE table_name = '",
adamc@871 98 sl,
adamc@871 99 "' AND column_name LIKE 'uw_%'"]
adamc@871 100 in
adamc@871 101 box [string "res = PQexec(conn, \"",
adamc@871 102 string q,
adamc@871 103 string "\");",
adamc@871 104 newline,
adamc@871 105 newline,
adamc@871 106 string "if (res == NULL) {",
adamc@871 107 newline,
adamc@871 108 box [string "PQfinish(conn);",
adamc@871 109 newline,
adamc@871 110 string "uw_error(ctx, FATAL, \"Out of memory allocating query result.\");",
adamc@871 111 newline],
adamc@871 112 string "}",
adamc@871 113 newline,
adamc@871 114 newline,
adamc@871 115 string "if (PQresultStatus(res) != PGRES_TUPLES_OK) {",
adamc@871 116 newline,
adamc@871 117 box [string "char msg[1024];",
adamc@871 118 newline,
adamc@871 119 string "strncpy(msg, PQerrorMessage(conn), 1024);",
adamc@871 120 newline,
adamc@871 121 string "msg[1023] = 0;",
adamc@871 122 newline,
adamc@871 123 string "PQclear(res);",
adamc@871 124 newline,
adamc@871 125 string "PQfinish(conn);",
adamc@871 126 newline,
adamc@871 127 string "uw_error(ctx, FATAL, \"Query failed:\\n",
adamc@871 128 string q,
adamc@871 129 string "\\n%s\", msg);",
adamc@871 130 newline],
adamc@871 131 string "}",
adamc@871 132 newline,
adamc@871 133 newline,
adamc@871 134 string "if (strcmp(PQgetvalue(res, 0, 0), \"1\")) {",
adamc@871 135 newline,
adamc@871 136 box [string "PQclear(res);",
adamc@871 137 newline,
adamc@871 138 string "PQfinish(conn);",
adamc@871 139 newline,
adamc@871 140 string "uw_error(ctx, FATAL, \"Table '",
adamc@871 141 string s,
adamc@871 142 string "' does not exist.\");",
adamc@871 143 newline],
adamc@871 144 string "}",
adamc@871 145 newline,
adamc@871 146 newline,
adamc@871 147 string "PQclear(res);",
adamc@871 148 newline,
adamc@871 149
adamc@871 150 string "res = PQexec(conn, \"",
adamc@871 151 string q',
adamc@871 152 string "\");",
adamc@871 153 newline,
adamc@871 154 newline,
adamc@871 155 string "if (res == NULL) {",
adamc@871 156 newline,
adamc@871 157 box [string "PQfinish(conn);",
adamc@871 158 newline,
adamc@871 159 string "uw_error(ctx, FATAL, \"Out of memory allocating query result.\");",
adamc@871 160 newline],
adamc@871 161 string "}",
adamc@871 162 newline,
adamc@871 163 newline,
adamc@871 164 string "if (PQresultStatus(res) != PGRES_TUPLES_OK) {",
adamc@871 165 newline,
adamc@871 166 box [string "char msg[1024];",
adamc@871 167 newline,
adamc@871 168 string "strncpy(msg, PQerrorMessage(conn), 1024);",
adamc@871 169 newline,
adamc@871 170 string "msg[1023] = 0;",
adamc@871 171 newline,
adamc@871 172 string "PQclear(res);",
adamc@871 173 newline,
adamc@871 174 string "PQfinish(conn);",
adamc@871 175 newline,
adamc@871 176 string "uw_error(ctx, FATAL, \"Query failed:\\n",
adamc@871 177 string q',
adamc@871 178 string "\\n%s\", msg);",
adamc@871 179 newline],
adamc@871 180 string "}",
adamc@871 181 newline,
adamc@871 182 newline,
adamc@871 183 string "if (strcmp(PQgetvalue(res, 0, 0), \"",
adamc@871 184 string (Int.toString (length xts)),
adamc@871 185 string "\")) {",
adamc@871 186 newline,
adamc@871 187 box [string "PQclear(res);",
adamc@871 188 newline,
adamc@871 189 string "PQfinish(conn);",
adamc@871 190 newline,
adamc@871 191 string "uw_error(ctx, FATAL, \"Table '",
adamc@871 192 string s,
adamc@871 193 string "' has the wrong column types.\");",
adamc@871 194 newline],
adamc@871 195 string "}",
adamc@871 196 newline,
adamc@871 197 newline,
adamc@871 198 string "PQclear(res);",
adamc@871 199 newline,
adamc@871 200 newline,
adamc@871 201
adamc@871 202 string "res = PQexec(conn, \"",
adamc@871 203 string q'',
adamc@871 204 string "\");",
adamc@871 205 newline,
adamc@871 206 newline,
adamc@871 207 string "if (res == NULL) {",
adamc@871 208 newline,
adamc@871 209 box [string "PQfinish(conn);",
adamc@871 210 newline,
adamc@871 211 string "uw_error(ctx, FATAL, \"Out of memory allocating query result.\");",
adamc@871 212 newline],
adamc@871 213 string "}",
adamc@871 214 newline,
adamc@871 215 newline,
adamc@871 216 string "if (PQresultStatus(res) != PGRES_TUPLES_OK) {",
adamc@871 217 newline,
adamc@871 218 box [string "char msg[1024];",
adamc@871 219 newline,
adamc@871 220 string "strncpy(msg, PQerrorMessage(conn), 1024);",
adamc@871 221 newline,
adamc@871 222 string "msg[1023] = 0;",
adamc@871 223 newline,
adamc@871 224 string "PQclear(res);",
adamc@871 225 newline,
adamc@871 226 string "PQfinish(conn);",
adamc@871 227 newline,
adamc@871 228 string "uw_error(ctx, FATAL, \"Query failed:\\n",
adamc@871 229 string q'',
adamc@871 230 string "\\n%s\", msg);",
adamc@871 231 newline],
adamc@871 232 string "}",
adamc@871 233 newline,
adamc@871 234 newline,
adamc@871 235 string "if (strcmp(PQgetvalue(res, 0, 0), \"",
adamc@871 236 string (Int.toString (length xts)),
adamc@871 237 string "\")) {",
adamc@871 238 newline,
adamc@871 239 box [string "PQclear(res);",
adamc@871 240 newline,
adamc@871 241 string "PQfinish(conn);",
adamc@871 242 newline,
adamc@871 243 string "uw_error(ctx, FATAL, \"Table '",
adamc@871 244 string s,
adamc@871 245 string "' has extra columns.\");",
adamc@871 246 newline],
adamc@871 247 string "}",
adamc@871 248 newline,
adamc@871 249 newline,
adamc@871 250 string "PQclear(res);",
adamc@871 251 newline]
adamc@871 252 end
adamc@871 253
adamc@872 254 fun init {dbstring, prepared = ss, tables, views, sequences} =
adamc@866 255 box [if #persistent (currentProtocol ()) then
adamc@1094 256 box [string "static void uw_db_validate(uw_context ctx) {",
adamc@870 257 newline,
adamc@870 258 string "PGconn *conn = uw_get_db(ctx);",
adamc@870 259 newline,
adamc@870 260 string "PGresult *res;",
adamc@870 261 newline,
adamc@870 262 newline,
adamc@872 263 p_list_sep newline (checkRel ("tables", true)) tables,
adamc@872 264 p_list_sep newline (checkRel ("views", false)) views,
adamc@870 265
adamc@870 266 p_list_sep newline
adamc@870 267 (fn s =>
adamc@870 268 let
adamc@870 269 val sl = CharVector.map Char.toLower s
adamc@870 270
adamc@870 271 val q = "SELECT COUNT(*) FROM pg_class WHERE relname = '"
adamc@870 272 ^ sl ^ "' AND relkind = 'S'"
adamc@870 273 in
adamc@870 274 box [string "res = PQexec(conn, \"",
adamc@870 275 string q,
adamc@870 276 string "\");",
adamc@870 277 newline,
adamc@870 278 newline,
adamc@870 279 string "if (res == NULL) {",
adamc@870 280 newline,
adamc@870 281 box [string "PQfinish(conn);",
adamc@870 282 newline,
adamc@870 283 string "uw_error(ctx, FATAL, \"Out of memory allocating query result.\");",
adamc@870 284 newline],
adamc@870 285 string "}",
adamc@870 286 newline,
adamc@870 287 newline,
adamc@870 288 string "if (PQresultStatus(res) != PGRES_TUPLES_OK) {",
adamc@870 289 newline,
adamc@870 290 box [string "char msg[1024];",
adamc@870 291 newline,
adamc@870 292 string "strncpy(msg, PQerrorMessage(conn), 1024);",
adamc@870 293 newline,
adamc@870 294 string "msg[1023] = 0;",
adamc@870 295 newline,
adamc@870 296 string "PQclear(res);",
adamc@870 297 newline,
adamc@870 298 string "PQfinish(conn);",
adamc@870 299 newline,
adamc@870 300 string "uw_error(ctx, FATAL, \"Query failed:\\n",
adamc@870 301 string q,
adamc@870 302 string "\\n%s\", msg);",
adamc@870 303 newline],
adamc@870 304 string "}",
adamc@870 305 newline,
adamc@870 306 newline,
adamc@870 307 string "if (strcmp(PQgetvalue(res, 0, 0), \"1\")) {",
adamc@870 308 newline,
adamc@870 309 box [string "PQclear(res);",
adamc@870 310 newline,
adamc@870 311 string "PQfinish(conn);",
adamc@870 312 newline,
adamc@870 313 string "uw_error(ctx, FATAL, \"Sequence '",
adamc@870 314 string s,
adamc@870 315 string "' does not exist.\");",
adamc@870 316 newline],
adamc@870 317 string "}",
adamc@870 318 newline,
adamc@870 319 newline,
adamc@870 320 string "PQclear(res);",
adamc@870 321 newline]
adamc@870 322 end) sequences,
adamc@870 323
adamc@870 324 string "}",
adamc@870 325
adamc@870 326 string "static void uw_db_prepare(uw_context ctx) {",
adamc@866 327 newline,
adamc@866 328 string "PGconn *conn = uw_get_db(ctx);",
adamc@866 329 newline,
adamc@866 330 string "PGresult *res;",
adamc@866 331 newline,
adamc@866 332 newline,
adamc@866 333
adamc@866 334 p_list_sepi newline (fn i => fn (s, n) =>
adamc@866 335 box [string "res = PQprepare(conn, \"uw",
adamc@866 336 string (Int.toString i),
adamc@866 337 string "\", \"",
adam@1285 338 string (String.toCString s),
adamc@866 339 string "\", ",
adamc@866 340 string (Int.toString n),
adamc@866 341 string ", NULL);",
adamc@866 342 newline,
adamc@866 343 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adamc@866 344 newline,
adamc@866 345 box [string "char msg[1024];",
adamc@866 346 newline,
adamc@866 347 string "strncpy(msg, PQerrorMessage(conn), 1024);",
adamc@866 348 newline,
adamc@866 349 string "msg[1023] = 0;",
adamc@866 350 newline,
adamc@866 351 string "PQclear(res);",
adamc@866 352 newline,
adamc@866 353 string "PQfinish(conn);",
adamc@866 354 newline,
adamc@866 355 string "uw_error(ctx, FATAL, \"Unable to create prepared statement:\\n",
adam@1285 356 string (String.toCString s),
adamc@866 357 string "\\n%s\", msg);",
adamc@866 358 newline],
adamc@866 359 string "}",
adamc@866 360 newline,
adamc@866 361 string "PQclear(res);",
adamc@866 362 newline])
adamc@866 363 ss,
adamc@866 364
adamc@866 365 string "}",
adamc@866 366 newline,
adamc@866 367 newline]
adamc@866 368 else
adamc@870 369 box [string "static void uw_db_validate(uw_context ctx) { }",
adamc@870 370 newline,
adamc@870 371 string "static void uw_db_prepare(uw_context ctx) { }"],
adamc@870 372
adamc@1094 373 string "static void uw_client_init(void) {",
adamc@1094 374 newline,
adamc@1094 375 box [string "uw_sqlfmtInt = \"%lld::int8%n\";",
adamc@1094 376 newline,
adamc@1094 377 string "uw_sqlfmtFloat = \"%g::float8%n\";",
adamc@1094 378 newline,
adamc@1094 379 string "uw_Estrings = 1;",
adamc@1094 380 newline,
adamc@1094 381 string "uw_sqlsuffixString = \"::text\";",
adamc@1094 382 newline,
adamc@1094 383 string "uw_sqlsuffixChar = \"::char\";",
adamc@1094 384 newline,
adamc@1094 385 string "uw_sqlsuffixBlob = \"::bytea\";",
adamc@1094 386 newline,
adamc@1094 387 string "uw_sqlfmtUint4 = \"%u::int4%n\";",
adamc@1094 388 newline],
adamc@1094 389 string "}",
adamc@866 390 newline,
adamc@866 391 newline,
adamc@866 392
adamc@1094 393 string "static void uw_db_close(uw_context ctx) {",
adamc@1094 394 newline,
adamc@1094 395 string "PQfinish(uw_get_db(ctx));",
adamc@1094 396 newline,
adamc@1094 397 string "}",
adamc@1094 398 newline,
adamc@1094 399 newline,
adamc@1094 400
adamc@1094 401 string "static int uw_db_begin(uw_context ctx) {",
adamc@1094 402 newline,
adamc@1094 403 string "PGconn *conn = uw_get_db(ctx);",
adamc@1094 404 newline,
adamc@1094 405 string "PGresult *res = PQexec(conn, \"BEGIN ISOLATION LEVEL SERIALIZABLE\");",
adamc@1094 406 newline,
adamc@1094 407 newline,
adamc@1094 408 string "if (res == NULL) return 1;",
adamc@1094 409 newline,
adamc@1094 410 newline,
adamc@1094 411 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adamc@1094 412 box [string "PQclear(res);",
adamc@1094 413 newline,
adamc@1094 414 string "return 1;",
adamc@1094 415 newline],
adamc@1094 416 string "}",
adamc@1094 417 newline,
adamc@1144 418 string "PQclear(res);",
adamc@1144 419 newline,
adamc@1094 420 string "return 0;",
adamc@1094 421 newline,
adamc@1094 422 string "}",
adamc@1094 423 newline,
adamc@1094 424 newline,
adamc@1094 425
adamc@1094 426 string "static int uw_db_commit(uw_context ctx) {",
adamc@1094 427 newline,
adamc@1094 428 string "PGconn *conn = uw_get_db(ctx);",
adamc@1094 429 newline,
adamc@1094 430 string "PGresult *res = PQexec(conn, \"COMMIT\");",
adamc@1094 431 newline,
adamc@1094 432 newline,
adamc@1094 433 string "if (res == NULL) return 1;",
adamc@1094 434 newline,
adamc@1094 435 newline,
adamc@1094 436 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adamc@1094 437 box [string "PQclear(res);",
adamc@1094 438 newline,
adamc@1094 439 string "return 1;",
adamc@1094 440 newline],
adamc@1094 441 string "}",
adamc@1094 442 newline,
adamc@1144 443 string "PQclear(res);",
adamc@1144 444 newline,
adamc@1094 445 string "return 0;",
adamc@1094 446 newline,
adamc@1094 447 string "}",
adamc@1094 448 newline,
adamc@1094 449 newline,
adamc@1094 450
adamc@1094 451 string "static int uw_db_rollback(uw_context ctx) {",
adamc@1094 452 newline,
adamc@1094 453 string "PGconn *conn = uw_get_db(ctx);",
adamc@1094 454 newline,
adamc@1094 455 string "PGresult *res = PQexec(conn, \"ROLLBACK\");",
adamc@1094 456 newline,
adamc@1094 457 newline,
adamc@1094 458 string "if (res == NULL) return 1;",
adamc@1094 459 newline,
adamc@1094 460 newline,
adamc@1094 461 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adamc@1094 462 box [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
adamc@1094 474 newline,
adamc@1094 475 newline,
adamc@1094 476
adamc@1094 477 string "static void uw_db_init(uw_context ctx) {",
adamc@866 478 newline,
adamc@866 479 string "PGconn *conn = PQconnectdb(\"",
adam@1285 480 string (String.toCString dbstring),
adamc@866 481 string "\");",
adamc@866 482 newline,
adamc@866 483 string "if (conn == NULL) uw_error(ctx, FATAL, ",
adamc@866 484 string "\"libpq can't allocate a connection.\");",
adamc@866 485 newline,
adamc@866 486 string "if (PQstatus(conn) != CONNECTION_OK) {",
adamc@866 487 newline,
adamc@866 488 box [string "char msg[1024];",
adamc@866 489 newline,
adamc@866 490 string "strncpy(msg, PQerrorMessage(conn), 1024);",
adamc@866 491 newline,
adamc@866 492 string "msg[1023] = 0;",
adamc@866 493 newline,
adamc@866 494 string "PQfinish(conn);",
adamc@866 495 newline,
adamc@866 496 string "uw_error(ctx, BOUNDED_RETRY, ",
adamc@866 497 string "\"Connection to Postgres server failed: %s\", msg);"],
adamc@866 498 newline,
adamc@866 499 string "}",
adamc@866 500 newline,
adamc@866 501 string "uw_set_db(ctx, conn);",
adamc@866 502 newline,
adamc@866 503 string "uw_db_validate(ctx);",
adamc@866 504 newline,
adamc@866 505 string "uw_db_prepare(ctx);",
adamc@866 506 newline,
adamc@866 507 string "}"]
adamc@866 508
adamc@880 509 fun p_getcol {loc, wontLeakStrings, col = i, typ = t} =
adamc@867 510 let
adamc@867 511 fun p_unsql t e eLen =
adamc@867 512 case t of
adamc@867 513 Int => box [string "uw_Basis_stringToInt_error(ctx, ", e, string ")"]
adamc@867 514 | Float => box [string "uw_Basis_stringToFloat_error(ctx, ", e, string ")"]
adamc@867 515 | String =>
adamc@867 516 if wontLeakStrings then
adamc@867 517 e
adamc@867 518 else
adamc@867 519 box [string "uw_strdup(ctx, ", e, string ")"]
adamc@1011 520 | Char => box [e, string "[0]"]
adamc@867 521 | Bool => box [string "uw_Basis_stringToBool_error(ctx, ", e, string ")"]
adamc@939 522 | Time => box [string "uw_Basis_unsqlTime(ctx, ", e, string ")"]
adamc@867 523 | Blob => box [string "uw_Basis_stringToBlob_error(ctx, ",
adamc@867 524 e,
adamc@867 525 string ", ",
adamc@867 526 eLen,
adamc@867 527 string ")"]
adamc@867 528 | Channel => box [string "uw_Basis_stringToChannel_error(ctx, ", e, string ")"]
adamc@867 529 | Client => box [string "uw_Basis_stringToClient_error(ctx, ", e, string ")"]
adamc@867 530
adamc@867 531 | Nullable _ => raise Fail "Postgres: Recursive Nullable"
adamc@867 532
adamc@867 533 fun getter t =
adamc@867 534 case t of
adamc@867 535 Nullable t =>
adamc@867 536 box [string "(PQgetisnull(res, i, ",
adamc@867 537 string (Int.toString i),
adamc@867 538 string ") ? NULL : ",
adamc@867 539 case t of
adamc@867 540 String => getter t
adamc@867 541 | _ => box [string "({",
adamc@867 542 newline,
adamc@874 543 string (p_sql_ctype t),
adamc@867 544 space,
adamc@867 545 string "*tmp = uw_malloc(ctx, sizeof(",
adamc@874 546 string (p_sql_ctype t),
adamc@867 547 string "));",
adamc@867 548 newline,
adamc@867 549 string "*tmp = ",
adamc@867 550 getter t,
adamc@867 551 string ";",
adamc@867 552 newline,
adamc@867 553 string "tmp;",
adamc@867 554 newline,
adamc@867 555 string "})"],
adamc@867 556 string ")"]
adamc@867 557 | _ =>
adamc@867 558 box [string "(PQgetisnull(res, i, ",
adamc@867 559 string (Int.toString i),
adamc@867 560 string ") ? ",
adamc@867 561 box [string "({",
adamc@874 562 string (p_sql_ctype t),
adamc@867 563 space,
adamc@867 564 string "tmp;",
adamc@867 565 newline,
adamc@880 566 string "uw_error(ctx, FATAL, \"",
adamc@880 567 string (ErrorMsg.spanToString loc),
adamc@880 568 string ": Unexpectedly NULL field #",
adamc@867 569 string (Int.toString i),
adamc@867 570 string "\");",
adamc@867 571 newline,
adamc@867 572 string "tmp;",
adamc@867 573 newline,
adamc@867 574 string "})"],
adamc@867 575 string " : ",
adamc@867 576 p_unsql t
adamc@867 577 (box [string "PQgetvalue(res, i, ",
adamc@867 578 string (Int.toString i),
adamc@867 579 string ")"])
adamc@867 580 (box [string "PQgetlength(res, i, ",
adamc@867 581 string (Int.toString i),
adamc@867 582 string ")"]),
adamc@867 583 string ")"]
adamc@867 584 in
adamc@867 585 getter t
adamc@867 586 end
adamc@867 587
adamc@873 588 fun queryCommon {loc, query, cols, doCols} =
adamc@867 589 box [string "int n, i;",
adamc@867 590 newline,
adamc@867 591 newline,
adamc@867 592
adamc@867 593 string "if (res == NULL) uw_error(ctx, FATAL, \"Out of memory allocating query result.\");",
adamc@867 594 newline,
adamc@867 595 newline,
adamc@867 596
adamc@867 597 string "if (PQresultStatus(res) != PGRES_TUPLES_OK) {",
adamc@867 598 newline,
adamc@867 599 box [string "PQclear(res);",
adamc@867 600 newline,
adamc@867 601 string "uw_error(ctx, FATAL, \"",
adamc@867 602 string (ErrorMsg.spanToString loc),
adamc@867 603 string ": Query failed:\\n%s\\n%s\", ",
adamc@867 604 query,
adamc@867 605 string ", PQerrorMessage(conn));",
adamc@867 606 newline],
adamc@867 607 string "}",
adamc@867 608 newline,
adamc@867 609 newline,
adamc@867 610
adamc@867 611 string "if (PQnfields(res) != ",
adamc@873 612 string (Int.toString (length cols)),
adamc@867 613 string ") {",
adamc@867 614 newline,
adamc@867 615 box [string "int nf = PQnfields(res);",
adamc@867 616 newline,
adamc@867 617 string "PQclear(res);",
adamc@867 618 newline,
adamc@867 619 string "uw_error(ctx, FATAL, \"",
adamc@867 620 string (ErrorMsg.spanToString loc),
adamc@867 621 string ": Query returned %d columns instead of ",
adamc@873 622 string (Int.toString (length cols)),
adamc@867 623 string ":\\n%s\\n%s\", nf, ",
adamc@867 624 query,
adamc@867 625 string ", PQerrorMessage(conn));",
adamc@867 626 newline],
adamc@867 627 string "}",
adamc@867 628 newline,
adamc@867 629 newline,
adamc@867 630
adamc@867 631 string "uw_end_region(ctx);",
adamc@867 632 newline,
adamc@867 633 string "uw_push_cleanup(ctx, (void (*)(void *))PQclear, res);",
adamc@867 634 newline,
adamc@867 635 string "n = PQntuples(res);",
adamc@867 636 newline,
adamc@867 637 string "for (i = 0; i < n; ++i) {",
adamc@867 638 newline,
adamc@867 639 doCols p_getcol,
adamc@867 640 string "}",
adamc@867 641 newline,
adamc@867 642 newline,
adamc@867 643 string "uw_pop_cleanup(ctx);",
adamc@867 644 newline]
adamc@867 645
adamc@873 646 fun query {loc, cols, doCols} =
adamc@867 647 box [string "PGconn *conn = uw_get_db(ctx);",
adamc@867 648 newline,
adamc@867 649 string "PGresult *res = PQexecParams(conn, query, 0, NULL, NULL, NULL, NULL, 0);",
adamc@867 650 newline,
adamc@867 651 newline,
adamc@873 652 queryCommon {loc = loc, cols = cols, doCols = doCols, query = string "query"}]
adamc@867 653
adamc@867 654 fun p_ensql t e =
adamc@867 655 case t of
adamc@867 656 Int => box [string "uw_Basis_attrifyInt(ctx, ", e, string ")"]
adamc@867 657 | Float => box [string "uw_Basis_attrifyFloat(ctx, ", e, string ")"]
adamc@867 658 | String => e
adamc@1011 659 | Char => box [string "uw_Basis_attrifyChar(ctx, ", e, string ")"]
adamc@867 660 | Bool => box [string "(", e, string " ? \"TRUE\" : \"FALSE\")"]
adam@1364 661 | Time => box [string "uw_Basis_ensqlTime(ctx, ", e, string ")"]
adamc@867 662 | Blob => box [e, string ".data"]
adamc@867 663 | Channel => box [string "uw_Basis_attrifyChannel(ctx, ", e, string ")"]
adamc@867 664 | Client => box [string "uw_Basis_attrifyClient(ctx, ", e, string ")"]
adamc@867 665 | Nullable String => e
adamc@867 666 | Nullable t => box [string "(",
adamc@867 667 e,
adamc@867 668 string " == NULL ? NULL : ",
adamc@867 669 p_ensql t (box [string "(*", e, string ")"]),
adamc@867 670 string ")"]
adamc@867 671
adam@1431 672 fun makeParams inputs =
adam@1431 673 box [string "static const int paramFormats[] = { ",
adamc@867 674 p_list_sep (box [string ",", space])
adamc@867 675 (fn t => if isBlob t then string "1" else string "0") inputs,
adamc@867 676 string " };",
adamc@867 677 newline,
adam@1431 678 if List.exists isBlob inputs then
adam@1431 679 box [string "const int *paramLengths = uw_malloc(ctx, ",
adam@1431 680 string (Int.toString (length inputs)),
adam@1431 681 string " * sizeof(int));",
adam@1431 682 newline,
adam@1431 683 p_list_sepi (box [])
adam@1431 684 (fn i => fn t =>
adam@1431 685 box [string "paramLengths[",
adam@1431 686 string (Int.toString i),
adam@1431 687 string "] = ",
adam@1431 688 case t of
adam@1431 689 Blob => string ("arg" ^ Int.toString (i + 1) ^ ".size")
adam@1431 690 | Nullable Blob => string ("arg" ^ Int.toString (i + 1)
adam@1431 691 ^ "?arg" ^ Int.toString (i + 1) ^ "->size:0")
adam@1431 692 | _ => string "0",
adam@1431 693 string ";",
adam@1431 694 newline]) inputs,
adam@1431 695 string " };",
adam@1431 696 newline]
adam@1431 697 else
adam@1431 698 box [string "const int *paramLengths = paramFormats;",
adam@1431 699 newline],
adam@1431 700
adam@1431 701 string "const char **paramValues = uw_malloc(ctx, ",
adam@1431 702 string (Int.toString (length inputs)),
adam@1431 703 string " * sizeof(char*));",
adamc@867 704 newline,
adam@1431 705 p_list_sepi (box [])
adam@1431 706 (fn i => fn t => box [string "paramValues[",
adam@1431 707 string (Int.toString i),
adam@1431 708 string "] = ",
adam@1431 709 p_ensql t (box [string "arg",
adam@1431 710 string (Int.toString (i + 1))]),
adam@1431 711 string ";",
adam@1431 712 newline])
adamc@867 713 inputs,
adam@1431 714 newline]
adam@1431 715
adam@1431 716 fun queryPrepared {loc, id, query, inputs, cols, doCols, nested = _} =
adam@1431 717 box [string "PGconn *conn = uw_get_db(ctx);",
adamc@867 718 newline,
adam@1431 719
adam@1431 720 makeParams inputs,
adam@1431 721
adamc@867 722 newline,
adamc@867 723 string "PGresult *res = ",
adamc@867 724 if #persistent (Settings.currentProtocol ()) then
adamc@867 725 box [string "PQexecPrepared(conn, \"uw",
adamc@867 726 string (Int.toString id),
adamc@867 727 string "\", ",
adamc@867 728 string (Int.toString (length inputs)),
adamc@867 729 string ", paramValues, paramLengths, paramFormats, 0);"]
adamc@867 730 else
adamc@867 731 box [string "PQexecParams(conn, \"",
adam@1285 732 string (String.toCString query),
adamc@867 733 string "\", ",
adamc@867 734 string (Int.toString (length inputs)),
adamc@867 735 string ", NULL, paramValues, paramLengths, paramFormats, 0);"],
adamc@867 736 newline,
adamc@867 737 newline,
adamc@873 738 queryCommon {loc = loc, cols = cols, doCols = doCols, query = box [string "\"",
adam@1285 739 string (String.toCString query),
adamc@873 740 string "\""]}]
adamc@867 741
adam@1293 742 fun dmlCommon {loc, dml, mode} =
adamc@868 743 box [string "if (res == NULL) uw_error(ctx, FATAL, \"Out of memory allocating DML result.\");",
adamc@868 744 newline,
adamc@868 745 newline,
adamc@868 746
adamc@868 747 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adamc@868 748 newline,
adamc@868 749 box [string "if (!strcmp(PQresultErrorField(res, PG_DIAG_SQLSTATE), \"40001\")) {",
adamc@868 750 box [newline,
adamc@868 751 string "PQclear(res);",
adamc@868 752 newline,
adamc@868 753 string "uw_error(ctx, UNLIMITED_RETRY, \"Serialization failure\");",
adamc@868 754 newline],
adamc@868 755 string "}",
adamc@868 756 newline,
adam@1293 757 case mode of
adam@1293 758 Settings.Error => box [string "PQclear(res);",
adam@1293 759 newline,
adam@1293 760 string "uw_error(ctx, FATAL, \"",
adam@1293 761 string (ErrorMsg.spanToString loc),
adam@1293 762 string ": DML failed:\\n%s\\n%s\", ",
adam@1293 763 dml,
adam@1293 764 string ", PQerrorMessage(conn));"]
adam@1295 765 | Settings.None => box [string "uw_set_error_message(ctx, PQerrorMessage(conn));",
adam@1295 766 newline,
adam@1295 767 newline,
adam@1295 768
adam@1295 769 string "res = PQexec(conn, \"ROLLBACK TO s\");",
adam@1295 770 newline,
adam@1295 771 string "if (res == NULL) uw_error(ctx, FATAL, \"Out of memory allocating DML result.\");",
adam@1295 772 newline,
adam@1295 773 newline,
adam@1295 774
adam@1295 775 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adam@1295 776 newline,
adam@1295 777 box [string "PQclear(res);",
adam@1295 778 newline,
adam@1295 779 string "uw_error(ctx, FATAL, \"",
adam@1295 780 string (ErrorMsg.spanToString loc),
adam@1295 781 string ": ROLLBACK TO failed:\\n%s\\n%s\", ",
adam@1295 782 dml,
adam@1295 783 string ", PQerrorMessage(conn));",
adam@1295 784 newline,
adam@1295 785 string "}"],
adam@1295 786 newline,
adam@1295 787
adam@1295 788 string "PQclear(res);",
adam@1295 789 newline],
adamc@868 790 newline],
adamc@868 791 string "}",
adamc@868 792
adam@1295 793 case mode of
adam@1295 794 Error => box [newline,
adam@1295 795 newline,
adam@1295 796 string "PQclear(res);",
adam@1295 797 newline]
adam@1295 798 | None => box[string " else {",
adam@1295 799 newline,
adam@1295 800 box [string "PQclear(res);",
adam@1295 801 newline,
adam@1295 802 string "res = PQexec(conn, \"RELEASE s\");",
adam@1295 803 newline,
adam@1295 804 string "if (res == NULL) uw_error(ctx, FATAL, \"Out of memory allocating DML result.\");",
adam@1295 805 newline,
adam@1295 806 newline,
adam@1295 807
adam@1295 808 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adam@1295 809 newline,
adam@1295 810 box [string "PQclear(res);",
adam@1295 811 newline,
adam@1295 812 string "uw_error(ctx, FATAL, \"",
adam@1295 813 string (ErrorMsg.spanToString loc),
adam@1295 814 string ": RELEASE failed:\\n%s\\n%s\", ",
adam@1295 815 dml,
adam@1295 816 string ", PQerrorMessage(conn));",
adam@1295 817 newline],
adam@1295 818 string "}",
adam@1295 819 newline,
adam@1295 820 string "PQclear(res);",
adam@1295 821 newline],
adam@1295 822 string "}",
adam@1295 823 newline]]
adam@1295 824
adam@1295 825 fun makeSavepoint mode =
adam@1295 826 case mode of
adam@1295 827 Error => box []
adam@1295 828 | None => box [string "res = PQexec(conn, \"SAVEPOINT s\");",
adam@1295 829 newline,
adam@1295 830 string "if (res == NULL) uw_error(ctx, FATAL, \"Out of memory allocating DML result.\");",
adam@1295 831 newline,
adam@1295 832 newline,
adam@1295 833 string "if (PQresultStatus(res) != PGRES_COMMAND_OK) {",
adam@1295 834 box [newline,
adam@1295 835 string "PQclear(res);",
adam@1295 836 newline,
adam@1295 837 string "uw_error(ctx, FATAL, \"Error creating SAVEPOINT\");",
adam@1295 838 newline],
adam@1295 839 string "}",
adam@1295 840 newline,
adam@1295 841 string "PQclear(res);",
adam@1295 842 newline,
adam@1295 843 newline]
adamc@868 844
adam@1293 845 fun dml (loc, mode) =
adamc@868 846 box [string "PGconn *conn = uw_get_db(ctx);",
adamc@868 847 newline,
adam@1295 848 string "PGresult *res;",
adam@1295 849 newline,
adam@1295 850
adam@1295 851 makeSavepoint mode,
adam@1295 852
adam@1295 853 string "res = PQexecParams(conn, dml, 0, NULL, NULL, NULL, NULL, 0);",
adamc@868 854 newline,
adamc@868 855 newline,
adam@1293 856 dmlCommon {loc = loc, dml = string "dml", mode = mode}]
adamc@868 857
adam@1293 858 fun dmlPrepared {loc, id, dml, inputs, mode} =
adamc@868 859 box [string "PGconn *conn = uw_get_db(ctx);",
adamc@868 860 newline,
adam@1431 861
adam@1431 862 makeParams inputs,
adam@1431 863
adamc@868 864 newline,
adam@1295 865 string "PGresult *res;",
adam@1295 866 newline,
adam@1295 867 newline,
adam@1295 868
adam@1295 869 makeSavepoint mode,
adam@1295 870
adam@1295 871 string "res = ",
adamc@868 872 if #persistent (Settings.currentProtocol ()) then
adamc@868 873 box [string "PQexecPrepared(conn, \"uw",
adamc@868 874 string (Int.toString id),
adamc@868 875 string "\", ",
adamc@868 876 string (Int.toString (length inputs)),
adamc@868 877 string ", paramValues, paramLengths, paramFormats, 0);"]
adamc@868 878 else
adamc@868 879 box [string "PQexecParams(conn, \"",
adam@1285 880 string (String.toCString dml),
adamc@868 881 string "\", ",
adamc@868 882 string (Int.toString (length inputs)),
adamc@868 883 string ", NULL, paramValues, paramLengths, paramFormats, 0);"],
adamc@868 884 newline,
adamc@868 885 newline,
adamc@868 886 dmlCommon {loc = loc, dml = box [string "\"",
adam@1285 887 string (String.toCString dml),
adam@1293 888 string "\""], mode = mode}]
adamc@868 889
adamc@869 890 fun nextvalCommon {loc, query} =
adamc@869 891 box [string "if (res == NULL) uw_error(ctx, FATAL, \"Out of memory allocating nextval result.\");",
adamc@869 892 newline,
adamc@869 893 newline,
adamc@869 894
adamc@869 895 string "if (PQresultStatus(res) != PGRES_TUPLES_OK) {",
adamc@869 896 newline,
adamc@869 897 box [string "PQclear(res);",
adamc@869 898 newline,
adamc@869 899 string "uw_error(ctx, FATAL, \"",
adamc@869 900 string (ErrorMsg.spanToString loc),
adamc@869 901 string ": Query failed:\\n%s\\n%s\", ",
adamc@869 902 query,
adamc@869 903 string ", PQerrorMessage(conn));",
adamc@869 904 newline],
adamc@869 905 string "}",
adamc@869 906 newline,
adamc@869 907 newline,
adamc@869 908
adamc@869 909 string "n = PQntuples(res);",
adamc@869 910 newline,
adamc@869 911 string "if (n != 1) {",
adamc@869 912 newline,
adamc@869 913 box [string "PQclear(res);",
adamc@869 914 newline,
adamc@869 915 string "uw_error(ctx, FATAL, \"",
adamc@869 916 string (ErrorMsg.spanToString loc),
adamc@869 917 string ": Wrong number of result rows:\\n%s\\n%s\", ",
adamc@869 918 query,
adamc@869 919 string ", PQerrorMessage(conn));",
adamc@869 920 newline],
adamc@869 921 string "}",
adamc@869 922 newline,
adamc@869 923 newline,
adamc@869 924
adamc@869 925 string "n = uw_Basis_stringToInt_error(ctx, PQgetvalue(res, 0, 0));",
adamc@869 926 newline,
adamc@869 927 string "PQclear(res);",
adamc@869 928 newline]
adamc@869 929
adamc@878 930 open Cjr
adamc@878 931
adamc@878 932 fun nextval {loc, seqE, seqName} =
adamc@878 933 let
adamc@878 934 val query = case seqName of
adamc@878 935 SOME s =>
adamc@879 936 string ("\"SELECT NEXTVAL('" ^ s ^ "')\"")
adamc@878 937 | _ => box [string "uw_Basis_strcat(ctx, \"SELECT NEXTVAL('\", uw_Basis_strcat(ctx, ",
adamc@878 938 seqE,
adamc@878 939 string ", \"')\"))"]
adamc@878 940 in
adamc@878 941 box [string "char *query = ",
adamc@878 942 query,
adamc@878 943 string ";",
adamc@878 944 newline,
adamc@878 945 string "PGconn *conn = uw_get_db(ctx);",
adamc@878 946 newline,
adamc@878 947 string "PGresult *res = PQexecParams(conn, query, 0, NULL, NULL, NULL, NULL, 0);",
adamc@878 948 newline,
adamc@878 949 newline,
adamc@878 950 nextvalCommon {loc = loc, query = string "query"}]
adamc@878 951 end
adamc@869 952
adamc@869 953 fun nextvalPrepared {loc, id, query} =
adamc@869 954 box [string "PGconn *conn = uw_get_db(ctx);",
adamc@869 955 newline,
adamc@869 956 newline,
adamc@869 957 string "PGresult *res = ",
adamc@869 958 if #persistent (Settings.currentProtocol ()) then
adamc@869 959 box [string "PQexecPrepared(conn, \"uw",
adamc@869 960 string (Int.toString id),
adamc@869 961 string "\", 0, NULL, NULL, NULL, 0);"]
adamc@869 962 else
adamc@869 963 box [string "PQexecParams(conn, \"",
adam@1285 964 string (String.toCString query),
adamc@869 965 string "\", 0, NULL, NULL, NULL, NULL, 0);"],
adamc@869 966 newline,
adamc@869 967 newline,
adamc@869 968 nextvalCommon {loc = loc, query = box [string "\"",
adam@1285 969 string (String.toCString query),
adamc@869 970 string "\""]}]
adamc@869 971
adamc@1073 972 fun setvalCommon {loc, query} =
adamc@1073 973 box [string "if (res == NULL) uw_error(ctx, FATAL, \"Out of memory allocating setval result.\");",
adamc@1073 974 newline,
adamc@1073 975 newline,
adamc@1073 976
adamc@1073 977 string "if (PQresultStatus(res) != PGRES_TUPLES_OK) {",
adamc@1073 978 newline,
adamc@1073 979 box [string "PQclear(res);",
adamc@1073 980 newline,
adamc@1073 981 string "uw_error(ctx, FATAL, \"",
adamc@1073 982 string (ErrorMsg.spanToString loc),
adamc@1073 983 string ": Query failed:\\n%s\\n%s\", ",
adamc@1073 984 query,
adamc@1073 985 string ", PQerrorMessage(conn));",
adamc@1073 986 newline],
adamc@1073 987 string "}",
adamc@1073 988 newline,
adamc@1073 989 newline,
adamc@1073 990
adamc@1073 991 string "PQclear(res);",
adamc@1073 992 newline]
adamc@1073 993
adamc@1073 994 fun setval {loc, seqE, count} =
adamc@1073 995 let
adamc@1073 996 val query = box [string "uw_Basis_strcat(ctx, \"SELECT SETVAL('\", uw_Basis_strcat(ctx, ",
adamc@1073 997 seqE,
adamc@1073 998 string ", uw_Basis_strcat(ctx, \"', \", uw_Basis_strcat(ctx, uw_Basis_sqlifyInt(ctx, ",
adamc@1073 999 count,
adamc@1073 1000 string "), \")\"))))"]
adamc@1073 1001 in
adamc@1073 1002 box [string "char *query = ",
adamc@1073 1003 query,
adamc@1073 1004 string ";",
adamc@1073 1005 newline,
adamc@1073 1006 string "PGconn *conn = uw_get_db(ctx);",
adamc@1073 1007 newline,
adamc@1073 1008 string "PGresult *res = PQexecParams(conn, query, 0, NULL, NULL, NULL, NULL, 0);",
adamc@1073 1009 newline,
adamc@1073 1010 newline,
adamc@1073 1011 setvalCommon {loc = loc, query = string "query"}]
adamc@1073 1012 end
adamc@1073 1013
adamc@874 1014 fun sqlifyString s = "E'" ^ String.translate (fn #"'" => "\\'"
adamc@874 1015 | #"\\" => "\\\\"
adamc@874 1016 | ch =>
adamc@874 1017 if Char.isPrint ch then
adamc@874 1018 str ch
adamc@874 1019 else
adamc@874 1020 "\\" ^ StringCvt.padLeft #"0" 3
adamc@874 1021 (Int.fmt StringCvt.OCT (ord ch)))
adam@1285 1022 (String.toCString s) ^ "'::text"
adamc@874 1023
adamc@874 1024 fun p_cast (s, t) = s ^ "::" ^ p_sql_type t
adamc@874 1025
adamc@874 1026 fun p_blank (n, t) = p_cast ("$" ^ Int.toString n, t)
adamc@874 1027
adamc@866 1028 val () = addDbms {name = "postgres",
adam@1464 1029 header = Config.pgheader,
adamc@866 1030 link = "-lpq",
adamc@873 1031 p_sql_type = p_sql_type,
adamc@867 1032 init = init,
adamc@867 1033 query = query,
adamc@868 1034 queryPrepared = queryPrepared,
adamc@868 1035 dml = dml,
adamc@869 1036 dmlPrepared = dmlPrepared,
adamc@869 1037 nextval = nextval,
adamc@874 1038 nextvalPrepared = nextvalPrepared,
adamc@1073 1039 setval = setval,
adamc@874 1040 sqlifyString = sqlifyString,
adamc@874 1041 p_cast = p_cast,
adamc@874 1042 p_blank = p_blank,
adamc@877 1043 supportsDeleteAs = true,
adamc@886 1044 supportsUpdateAs = true,
adamc@877 1045 createSequence = fn s => "CREATE SEQUENCE " ^ s,
adamc@878 1046 textKeysNeedLengths = false,
adamc@879 1047 supportsNextval = true,
adamc@882 1048 supportsNestedPrepared = true,
adamc@890 1049 sqlPrefix = "",
adamc@1014 1050 supportsOctetLength = true,
adamc@1014 1051 trueString = "TRUE",
adamc@1196 1052 falseString = "FALSE",
adamc@1196 1053 onlyUnion = false,
adamc@1196 1054 nestedRelops = true}
adamc@874 1055
adamc@866 1056 val () = setDbms "postgres"
adamc@866 1057
adamc@866 1058 end