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Error message editing in backend/libpq, backend/postmaster, backend/tcop.

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Along the way, fix some logic problems in pgstat_initstats, notably the
bogus assumption that malloc returns zeroed memory.
This commit is contained in:
Tom Lane
2003-07-22 19:00:12 +00:00
parent 277dbb0c34
commit b05d3ae1ed
21 changed files with 1254 additions and 815 deletions
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233
src/backend/tcop/postgres.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.350 2003/07/09 06:47:34 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.351 2003/07/22 19:00:11 tgl Exp $
*
* NOTES
* this is the "main" module of the postgres backend and
@ -275,7 +275,9 @@ SocketBackend(StringInfo inBuf)
if (qtype == EOF) /* frontend disconnected */
{
elog(COMMERROR, "unexpected EOF on client connection");
ereport(COMMERROR,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("unexpected EOF on client connection")));
return qtype;
}
@ -296,7 +298,9 @@ SocketBackend(StringInfo inBuf)
/* old style without length word; convert */
if (pq_getstring(inBuf))
{
elog(COMMERROR, "unexpected EOF on client connection");
ereport(COMMERROR,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("unexpected EOF on client connection")));
return EOF;
}
}
@ -321,7 +325,9 @@ SocketBackend(StringInfo inBuf)
doing_extended_query_message = true;
/* these are only legal in protocol 3 */
if (PG_PROTOCOL_MAJOR(FrontendProtocol) < 3)
elog(FATAL, "Socket command type %c unknown", qtype);
ereport(FATAL,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("invalid frontend message type %d", qtype)));
break;
case 'S': /* sync */
@ -331,7 +337,9 @@ SocketBackend(StringInfo inBuf)
doing_extended_query_message = false;
/* only legal in protocol 3 */
if (PG_PROTOCOL_MAJOR(FrontendProtocol) < 3)
elog(FATAL, "Socket command type %c unknown", qtype);
ereport(FATAL,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("invalid frontend message type %d", qtype)));
break;
case 'd': /* copy data */
@ -340,7 +348,9 @@ SocketBackend(StringInfo inBuf)
doing_extended_query_message = false;
/* these are only legal in protocol 3 */
if (PG_PROTOCOL_MAJOR(FrontendProtocol) < 3)
elog(FATAL, "Socket command type %c unknown", qtype);
ereport(FATAL,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("invalid frontend message type %d", qtype)));
break;
default:
@ -349,7 +359,9 @@ SocketBackend(StringInfo inBuf)
* as fatal because we have probably lost message boundary sync,
* and there's no good way to recover.
*/
elog(FATAL, "Socket command type %c unknown", qtype);
ereport(FATAL,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("invalid frontend message type %d", qtype)));
break;
}
@ -446,7 +458,8 @@ pg_parse_query(const char *query_string)
List *raw_parsetree_list;
if (log_statement)
elog(LOG, "query: %s", query_string);
ereport(LOG,
(errmsg("query: %s", query_string)));
if (log_parser_stats)
ResetUsage();
@ -544,7 +557,8 @@ pg_rewrite_queries(List *querytree_list)
new_list = (List *) copyObject(querytree_list);
/* This checks both copyObject() and the equal() routines... */
if (!equal(new_list, querytree_list))
elog(WARNING, "pg_rewrite_queries: copyObject failed on parse tree");
ereport(WARNING,
(errmsg("copyObject failed to produce an equal parse tree")));
else
querytree_list = new_list;
#endif
@ -588,7 +602,8 @@ pg_plan_query(Query *querytree)
#ifdef NOT_USED
/* This checks both copyObject() and the equal() routines... */
if (!equal(new_plan, plan))
elog(WARNING, "pg_plan_query: copyObject failed on plan tree");
ereport(WARNING,
(errmsg("copyObject failed to produce an equal plan tree")));
else
#endif
plan = new_plan;
@ -774,8 +789,10 @@ exec_simple_query(const char *query_string)
}
if (!allowit)
elog(ERROR, "current transaction is aborted, "
"queries ignored until end of transaction block");
ereport(ERROR,
(errcode(ERRCODE_IN_FAILED_SQL_TRANSACTION),
errmsg("current transaction is aborted, "
"queries ignored until end of transaction block")));
}
/* Make sure we are in a transaction command */
@ -936,19 +953,21 @@ exec_simple_query(const char *query_string)
* min duration.
*/
if (usecs >= save_log_min_duration_statement * 1000)
elog(LOG, "duration_statement: %ld.%06ld %s",
(long) (stop_t.tv_sec - start_t.tv_sec),
(long) (stop_t.tv_usec - start_t.tv_usec),
query_string);
ereport(LOG,
(errmsg("duration_statement: %ld.%06ld %s",
(long) (stop_t.tv_sec - start_t.tv_sec),
(long) (stop_t.tv_usec - start_t.tv_usec),
query_string)));
/*
* If the user is requesting logging of all durations, then log
* that as well.
*/
if (save_log_duration)
elog(LOG, "duration: %ld.%06ld sec",
(long) (stop_t.tv_sec - start_t.tv_sec),
(long) (stop_t.tv_usec - start_t.tv_usec));
ereport(LOG,
(errmsg("duration: %ld.%06ld sec",
(long) (stop_t.tv_sec - start_t.tv_sec),
(long) (stop_t.tv_usec - start_t.tv_usec))));
}
if (save_log_statement_stats)
@ -1050,7 +1069,9 @@ exec_parse_message(const char *query_string, /* string to execute */
* to worry about multiple result tupdescs and things like that.
*/
if (length(parsetree_list) > 1)
elog(ERROR, "Cannot insert multiple commands into a prepared statement");
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("cannot insert multiple commands into a prepared statement")));
if (parsetree_list != NIL)
{
@ -1084,8 +1105,10 @@ exec_parse_message(const char *query_string, /* string to execute */
}
if (!allowit)
elog(ERROR, "current transaction is aborted, "
"queries ignored until end of transaction block");
ereport(ERROR,
(errcode(ERRCODE_IN_FAILED_SQL_TRANSACTION),
errmsg("current transaction is aborted, "
"queries ignored until end of transaction block")));
}
/*
@ -1110,8 +1133,10 @@ exec_parse_message(const char *query_string, /* string to execute */
Oid ptype = paramTypes[i];
if (ptype == InvalidOid || ptype == UNKNOWNOID)
elog(ERROR, "Could not determine datatype of parameter $%d",
i + 1);
ereport(ERROR,
(errcode(ERRCODE_INDETERMINATE_DATATYPE),
errmsg("could not determine datatype of parameter $%d",
i + 1)));
param_list = lappendo(param_list, ptype);
}
@ -1237,8 +1262,10 @@ exec_bind_message(StringInfo input_message)
numParams = pq_getmsgint(input_message, 2);
if (numPFormats > 1 && numPFormats != numParams)
elog(ERROR, "BIND message has %d parameter formats but %d parameters",
numPFormats, numParams);
ereport(ERROR,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("bind message has %d parameter formats but %d parameters",
numPFormats, numParams)));
/* Find prepared statement */
if (stmt_name[0] != '\0')
@ -1248,12 +1275,16 @@ exec_bind_message(StringInfo input_message)
/* special-case the unnamed statement */
pstmt = unnamed_stmt_pstmt;
if (!pstmt)
elog(ERROR, "Unnamed prepared statement does not exist");
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_PSTATEMENT),
errmsg("unnamed prepared statement does not exist")));
}
if (numParams != length(pstmt->argtype_list))
elog(ERROR, "Bind message supplies %d parameters, but prepared statement \"%s\" requires %d",
numParams, stmt_name, length(pstmt->argtype_list));
ereport(ERROR,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("bind message supplies %d parameters, but prepared statement \"%s\" requires %d",
numParams, stmt_name, length(pstmt->argtype_list))));
/*
* Create the portal. Allow silent replacement of an existing portal
@ -1375,12 +1406,17 @@ exec_bind_message(StringInfo input_message)
/* Trouble if it didn't eat the whole buffer */
if (pbuf.cursor != pbuf.len)
elog(ERROR, "Improper binary format in BIND parameter %d",
i + 1);
ereport(ERROR,
(errcode(ERRCODE_INVALID_BINARY_REPRESENTATION),
errmsg("incorrect binary data format in bind parameter %d",
i + 1)));
}
else
{
elog(ERROR, "Invalid format code %d", pformat);
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("unsupported format code: %d",
pformat)));
}
/* Restore message buffer contents */
@ -1453,7 +1489,9 @@ exec_execute_message(const char *portal_name, long max_rows)
portal = GetPortalByName(portal_name);
if (!PortalIsValid(portal))
elog(ERROR, "Portal \"%s\" not found", portal_name);
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_CURSOR),
errmsg("portal \"%s\" does not exist", portal_name)));
/*
* If the original query was a null string, just return EmptyQueryResponse.
@ -1517,8 +1555,10 @@ exec_execute_message(const char *portal_name, long max_rows)
if (IsAbortedTransactionBlockState())
{
if (!is_trans_exit)
elog(ERROR, "current transaction is aborted, "
"queries ignored until end of transaction block");
ereport(ERROR,
(errcode(ERRCODE_IN_FAILED_SQL_TRANSACTION),
errmsg("current transaction is aborted, "
"queries ignored until end of transaction block")));
}
/* Check for cancel signal before we start execution */
@ -1591,7 +1631,9 @@ exec_describe_statement_message(const char *stmt_name)
/* special-case the unnamed statement */
pstmt = unnamed_stmt_pstmt;
if (!pstmt)
elog(ERROR, "Unnamed prepared statement does not exist");
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_PSTATEMENT),
errmsg("unnamed prepared statement does not exist")));
}
if (whereToSendOutput != Remote)
@ -1642,7 +1684,9 @@ exec_describe_portal_message(const char *portal_name)
portal = GetPortalByName(portal_name);
if (!PortalIsValid(portal))
elog(ERROR, "Portal \"%s\" not found", portal_name);
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_CURSOR),
errmsg("portal \"%s\" does not exist", portal_name)));
if (whereToSendOutput != Remote)
return; /* can't actually do anything... */
@ -1724,13 +1768,19 @@ void
quickdie(SIGNAL_ARGS)
{
PG_SETMASK(&BlockSig);
elog(WARNING, "Message from PostgreSQL backend:"
"\n\tThe Postmaster has informed me that some other backend"
"\n\tdied abnormally and possibly corrupted shared memory."
"\n\tI have rolled back the current transaction and am"
"\n\tgoing to terminate your database system connection and exit."
"\n\tPlease reconnect to the database system and repeat your query.");
/*
* Ideally this should be ereport(FATAL), but then we'd not get control
* back (perhaps could fix by doing local sigsetjmp?)
*/
ereport(WARNING,
(errcode(ERRCODE_CRASH_SHUTDOWN),
errmsg("terminating connection due to crash of another backend"),
errdetail("The postmaster has commanded this backend to roll back"
" the current transaction and exit, because another"
" backend exited abnormally and possibly corrupted"
" shared memory."),
errhint("In a moment you should be able to reconnect to the"
" database and repeat your query.")));
/*
* DO NOT proc_exit() -- we're here because shared memory may be
* corrupted, so we don't want to try to clean up our transaction.
@ -1741,7 +1791,6 @@ quickdie(SIGNAL_ARGS)
* random backend. This is necessary precisely because we don't clean
* up our shared memory state.
*/
exit(1);
}
@ -1842,9 +1891,12 @@ StatementCancelHandler(SIGNAL_ARGS)
static void
FloatExceptionHandler(SIGNAL_ARGS)
{
elog(ERROR, "floating point exception!"
" The last floating point operation either exceeded legal ranges"
" or was a divide by zero");
ereport(ERROR,
(errcode(ERRCODE_FLOATING_POINT_EXCEPTION),
errmsg("floating-point exception"),
errdetail("An invalid floating-point operation was signaled. "
"This probably means an out-of-range result or an "
"invalid operation, such as division by zero.")));
}
/* SIGHUP: set flag to re-read config file at next convenient time */
@ -1875,14 +1927,18 @@ ProcessInterrupts(void)
QueryCancelPending = false; /* ProcDie trumps QueryCancel */
ImmediateInterruptOK = false; /* not idle anymore */
DisableNotifyInterrupt();
elog(FATAL, "This connection has been terminated by the administrator.");
ereport(FATAL,
(errcode(ERRCODE_ADMIN_SHUTDOWN),
errmsg("terminating connection due to administrator command")));
}
if (QueryCancelPending)
{
QueryCancelPending = false;
ImmediateInterruptOK = false; /* not idle anymore */
DisableNotifyInterrupt();
elog(ERROR, "Query was canceled.");
ereport(ERROR,
(errcode(ERRCODE_QUERY_CANCELED),
errmsg("canceling query due to user request")));
}
/* If we get here, do nothing (probably, QueryCancelPending was reset) */
}
@ -2028,7 +2084,9 @@ PostgresMain(int argc, char *argv[], const char *username)
#ifdef USE_ASSERT_CHECKING
SetConfigOption("debug_assertions", optarg, ctx, gucsource);
#else
elog(WARNING, "Assert checking is not compiled in");
ereport(WARNING,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("assert checking is not compiled in")));
#endif
break;
@ -2313,9 +2371,15 @@ PostgresMain(int argc, char *argv[], const char *username)
if (!value)
{
if (flag == '-')
elog(ERROR, "--%s requires argument", optarg);
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("--%s requires a value",
optarg)));
else
elog(ERROR, "-c %s requires argument", optarg);
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("-c %s requires a value",
optarg)));
}
SetConfigOption(name, value, ctx, gucsource);
@ -2372,7 +2436,9 @@ PostgresMain(int argc, char *argv[], const char *username)
if (log_statement_stats &&
(log_parser_stats || log_planner_stats || log_executor_stats))
{
elog(WARNING, "Query statistics are disabled because parser, planner, or executor statistics are on.");
ereport(WARNING,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("query-level statistics are disabled because parser, planner, or executor statistics are on")));
SetConfigOption("show_statement_stats", "false", ctx, gucsource);
}
@ -2452,10 +2518,10 @@ PostgresMain(int argc, char *argv[], const char *username)
/* noninteractive case: nothing should be left after switches */
if (errs || argc != optind || dbname == NULL)
{
elog(WARNING, "%s: invalid command line arguments\nTry -? for help.",
argv[0]);
proc_exit(0); /* not 1, that causes system-wide
* restart... */
ereport(FATAL,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("invalid backend command-line arguments"),
errhint("Try -? for help.")));
}
BaseInit();
#ifdef EXECBACKEND
@ -2467,17 +2533,20 @@ PostgresMain(int argc, char *argv[], const char *username)
/* interactive case: database name can be last arg on command line */
if (errs || argc - optind > 1)
{
elog(WARNING, "%s: invalid command line arguments\nTry -? for help.",
argv[0]);
proc_exit(1);
ereport(FATAL,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("%s: invalid command-line arguments",
argv[0]),
errhint("Try -? for help.")));
}
else if (argc - optind == 1)
dbname = argv[optind];
else if ((dbname = username) == NULL)
{
elog(WARNING, "%s: user name undefined and no database specified",
argv[0]);
proc_exit(1);
ereport(FATAL,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("%s: no database nor user name specified",
argv[0])));
}
/*
@ -2485,8 +2554,9 @@ PostgresMain(int argc, char *argv[], const char *username)
* pathname. (If under postmaster, this was done already.)
*/
if (FindExec(pg_pathname, argv[0], "postgres") < 0)
elog(FATAL, "%s: could not locate executable, bailing out...",
argv[0]);
ereport(FATAL,
(errmsg("%s: could not locate postgres executable",
argv[0])));
/*
* Validate we have been given a reasonable-looking DataDir (if
@ -2556,7 +2626,7 @@ PostgresMain(int argc, char *argv[], const char *username)
if (!IsUnderPostmaster)
{
puts("\nPOSTGRES backend interactive interface ");
puts("$Revision: 1.350 $ $Date: 2003/07/09 06:47:34 $\n");
puts("$Revision: 1.351 $ $Date: 2003/07/22 19:00:11 $\n");
}
/*
@ -2594,7 +2664,7 @@ PostgresMain(int argc, char *argv[], const char *username)
*
* Make sure we're not interrupted while cleaning up. Also forget
* any pending QueryCancel request, since we're aborting anyway.
* Force InterruptHoldoffCount to a known state in case we elog'd
* Force InterruptHoldoffCount to a known state in case we ereport'd
* from inside a holdoff section.
*/
ImmediateInterruptOK = false;
@ -2648,7 +2718,7 @@ PostgresMain(int argc, char *argv[], const char *username)
RESUME_INTERRUPTS();
}
Warn_restart_ready = true; /* we can now handle elog(ERROR) */
Warn_restart_ready = true; /* we can now handle ereport(ERROR) */
PG_SETMASK(&UnBlockSig);
@ -2826,7 +2896,7 @@ PostgresMain(int argc, char *argv[], const char *username)
/* lost frontend connection during F message input */
/*
* Reset whereToSendOutput to prevent elog from
* Reset whereToSendOutput to prevent ereport from
* attempting to send any more messages to client.
*/
if (whereToSendOutput == Remote)
@ -2877,8 +2947,10 @@ PostgresMain(int argc, char *argv[], const char *username)
}
break;
default:
elog(ERROR, "Invalid Close message subtype %d",
close_type);
ereport(ERROR,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("invalid CLOSE message subtype %d",
close_type)));
break;
}
@ -2905,8 +2977,10 @@ PostgresMain(int argc, char *argv[], const char *username)
exec_describe_portal_message(describe_target);
break;
default:
elog(ERROR, "Invalid Describe message subtype %d",
describe_type);
ereport(ERROR,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("invalid DESCRIBE message subtype %d",
describe_type)));
break;
}
}
@ -2933,7 +3007,7 @@ PostgresMain(int argc, char *argv[], const char *username)
case EOF:
/*
* Reset whereToSendOutput to prevent elog from attempting
* Reset whereToSendOutput to prevent ereport from attempting
* to send any more messages to client.
*/
if (whereToSendOutput == Remote)
@ -2959,7 +3033,10 @@ PostgresMain(int argc, char *argv[], const char *username)
break;
default:
elog(FATAL, "Socket command type %c unknown", firstchar);
ereport(FATAL,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("invalid frontend message type %d",
firstchar)));
}
#ifdef MEMORY_CONTEXT_CHECKING
@ -3088,7 +3165,9 @@ ShowUsage(const char *title)
if (str.data[str.len - 1] == '\n')
str.data[--str.len] = '\0';
elog(LOG, "%s\n%s", title, str.data);
ereport(LOG,
(errmsg_internal("%s", title),
errdetail("%s", str.data)));
pfree(str.data);
}