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connection.c
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connection.c
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/*------
* Module: connection.c
*
* Description: This module contains routines related to
* connecting to and disconnecting from the Postgres DBMS.
*
* Classes: ConnectionClass (Functions prefix: "CC_")
*
* API functions: SQLAllocConnect, SQLConnect, SQLDisconnect, SQLFreeConnect,
* SQLBrowseConnect(NI)
*
* Comments: See "readme.txt" for copyright and license information.
*-------
*/
/* Multibyte support Eiji Tokuya 2001-03-15 */
/* TryEnterCritiaclSection needs the following #define */
#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x0400
#endif /* _WIN32_WINNT */
#include "connection.h"
#include "misc.h"
#include <stdio.h>
#include <string.h>
#include <ctype.h>
/* for htonl */
#ifdef WIN32
#include <Winsock2.h>
#else
#include <arpa/inet.h>
#endif
#include "environ.h"
#include "statement.h"
#include "qresult.h"
#include "lobj.h"
#include "dlg_specific.h"
#include "loadlib.h"
#include "multibyte.h"
#include "pgapifunc.h"
#define SAFE_STR(s) (NULL != (s) ? (s) : "(null)")
#define STMT_INCREMENT 16 /* how many statement holders to allocate
* at a time */
static SQLRETURN CC_lookup_lo(ConnectionClass *self);
static int CC_close_eof_cursors(ConnectionClass *self);
static void LIBPQ_update_transaction_status(ConnectionClass *self);
static void CC_set_error_if_not_set(ConnectionClass *self, int errornumber, const char *errormsg, const char *func)
{
int errornum = CC_get_errornumber(self);
const char *errmsg = CC_get_errormsg(self);
if (errornumber == 0)
return;
if (errornumber > 0)
{
if (errornum <= 0)
CC_set_error(self, errornumber, errormsg, func);
else if (!errmsg)
CC_set_errormsg(self, errormsg);
}
else if (errornum == 0)
CC_set_error(self, errornumber, errormsg, func);
else if (errornum < 0 && !errmsg)
CC_set_errormsg(self, errormsg);
}
RETCODE SQL_API
PGAPI_AllocConnect(HENV henv,
HDBC * phdbc)
{
EnvironmentClass *env = (EnvironmentClass *) henv;
ConnectionClass *conn;
CSTR func = "PGAPI_AllocConnect";
MYLOG(0, "entering...\n");
conn = CC_Constructor();
MYLOG(0, "**** henv = %p, conn = %p\n", henv, conn);
if (!conn)
{
env->errormsg = "Couldn't allocate memory for Connection object.";
env->errornumber = ENV_ALLOC_ERROR;
*phdbc = SQL_NULL_HDBC;
EN_log_error(func, "", env);
return SQL_ERROR;
}
if (!EN_add_connection(env, conn))
{
env->errormsg = "Maximum number of connections exceeded.";
env->errornumber = ENV_ALLOC_ERROR;
CC_Destructor(conn);
*phdbc = SQL_NULL_HDBC;
EN_log_error(func, "", env);
return SQL_ERROR;
}
if (phdbc)
*phdbc = (HDBC) conn;
return SQL_SUCCESS;
}
RETCODE SQL_API
PGAPI_Connect(HDBC hdbc,
const SQLCHAR * szDSN,
SQLSMALLINT cbDSN,
const SQLCHAR * szUID,
SQLSMALLINT cbUID,
const SQLCHAR * szAuthStr,
SQLSMALLINT cbAuthStr)
{
ConnectionClass *conn = (ConnectionClass *) hdbc;
ConnInfo *ci;
CSTR func = "PGAPI_Connect";
RETCODE ret = SQL_SUCCESS;
char fchar, *tmpstr;
MYLOG(0, "entering..cbDSN=%hi.\n", cbDSN);
if (!conn)
{
CC_log_error(func, "", NULL);
return SQL_INVALID_HANDLE;
}
ci = &conn->connInfo;
CC_conninfo_init(ci, INIT_GLOBALS);
make_string(szDSN, cbDSN, ci->dsn, sizeof(ci->dsn));
/* get the values for the DSN from the registry */
getDSNinfo(ci, NULL);
logs_on_off(1, ci->drivers.debug, ci->drivers.commlog);
/* initialize pg_version from connInfo.protocol */
CC_initialize_pg_version(conn);
/*
* override values from DSN info with UID and authStr(pwd) This only
* occurs if the values are actually there.
*/
fchar = ci->username[0]; /* save the first byte */
make_string(szUID, cbUID, ci->username, sizeof(ci->username));
if ('\0' == ci->username[0]) /* an empty string is specified */
ci->username[0] = fchar; /* restore the original username */
tmpstr = make_string(szAuthStr, cbAuthStr, NULL, 0);
if (tmpstr)
{
if (tmpstr[0]) /* non-empty string is specified */
STR_TO_NAME(ci->password, tmpstr);
free(tmpstr);
}
MYLOG(0, "conn = %p (DSN='%s', UID='%s', PWD='%s')\n", conn, ci->dsn, ci->username, NAME_IS_VALID(ci->password) ? "xxxxx" : "");
if ((fchar = CC_connect(conn, NULL)) <= 0)
{
/* Error messages are filled in */
CC_log_error(func, "Error on CC_connect", conn);
ret = SQL_ERROR;
}
if (SQL_SUCCESS == ret && 2 == fchar)
ret = SQL_SUCCESS_WITH_INFO;
MYLOG(0, "leaving..%d.\n", ret);
return ret;
}
RETCODE SQL_API
PGAPI_BrowseConnect(HDBC hdbc,
const SQLCHAR * szConnStrIn,
SQLSMALLINT cbConnStrIn,
SQLCHAR * szConnStrOut,
SQLSMALLINT cbConnStrOutMax,
SQLSMALLINT * pcbConnStrOut)
{
CSTR func = "PGAPI_BrowseConnect";
ConnectionClass *conn = (ConnectionClass *) hdbc;
MYLOG(0, "entering...\n");
CC_set_error(conn, CONN_NOT_IMPLEMENTED_ERROR, "Function not implemented", func);
return SQL_ERROR;
}
/* Drop any hstmts open on hdbc and disconnect from database */
RETCODE SQL_API
PGAPI_Disconnect(HDBC hdbc)
{
ConnectionClass *conn = (ConnectionClass *) hdbc;
CSTR func = "PGAPI_Disconnect";
MYLOG(0, "entering...\n");
if (!conn)
{
CC_log_error(func, "", NULL);
return SQL_INVALID_HANDLE;
}
if (conn->status == CONN_EXECUTING)
{
CC_set_error(conn, CONN_IN_USE, "A transaction is currently being executed", func);
return SQL_ERROR;
}
logs_on_off(-1, conn->connInfo.drivers.debug, conn->connInfo.drivers.commlog);
MYLOG(0, "about to CC_cleanup\n");
/* Close the connection and free statements */
CC_cleanup(conn, FALSE);
MYLOG(0, "done CC_cleanup\n");
MYLOG(0, "leaving...\n");
return SQL_SUCCESS;
}
RETCODE SQL_API
PGAPI_FreeConnect(HDBC hdbc)
{
ConnectionClass *conn = (ConnectionClass *) hdbc;
CSTR func = "PGAPI_FreeConnect";
EnvironmentClass *env;
MYLOG(0, "entering...hdbc=%p\n", hdbc);
if (!conn)
{
CC_log_error(func, "", NULL);
return SQL_INVALID_HANDLE;
}
/* Remove the connection from the environment */
if (NULL != (env = CC_get_env(conn)) &&
!EN_remove_connection(env, conn))
{
CC_set_error(conn, CONN_IN_USE, "A transaction is currently being executed", func);
return SQL_ERROR;
}
CC_Destructor(conn);
MYLOG(0, "leaving...\n");
return SQL_SUCCESS;
}
/*
* IMPLEMENTATION CONNECTION CLASS
*/
static void
reset_current_schema(ConnectionClass *self)
{
if (self->current_schema)
{
free(self->current_schema);
self->current_schema = NULL;
}
self->current_schema_valid = FALSE;
}
static ConnectionClass *
CC_alloc(void)
{
return (ConnectionClass *) calloc(sizeof(ConnectionClass), 1);
}
static void
CC_lockinit(ConnectionClass *self)
{
INIT_CONNLOCK(self);
INIT_CONN_CS(self);
}
static ConnectionClass *
CC_initialize(ConnectionClass *rv, BOOL lockinit)
{
size_t clear_size;
#if defined(WIN_MULTITHREAD_SUPPORT) || defined(POSIX_THREADMUTEX_SUPPORT)
clear_size = (char *)&(rv->cs) - (char *)rv;
#else
clear_size = sizeof(ConnectionClass);
#endif /* WIN_MULTITHREAD_SUPPORT */
memset(rv, 0, clear_size);
rv->status = CONN_NOT_CONNECTED;
rv->transact_status = CONN_IN_AUTOCOMMIT; /* autocommit by default */
rv->unnamed_prepared_stmt = NULL;
rv->stmts = (StatementClass **) malloc(sizeof(StatementClass *) * STMT_INCREMENT);
if (!rv->stmts)
goto cleanup;
memset(rv->stmts, 0, sizeof(StatementClass *) * STMT_INCREMENT);
rv->num_stmts = STMT_INCREMENT;
rv->descs = (DescriptorClass **) malloc(sizeof(DescriptorClass *) * STMT_INCREMENT);
if (!rv->descs)
goto cleanup;
memset(rv->descs, 0, sizeof(DescriptorClass *) * STMT_INCREMENT);
rv->num_descs = STMT_INCREMENT;
rv->lobj_type = PG_TYPE_LO_UNDEFINED;
if (isMsAccess())
rv->ms_jet = 1;
rv->isolation = 0; // means initially unknown server's default isolation
rv->mb_maxbyte_per_char = 1;
rv->max_identifier_length = -1;
rv->autocommit_public = SQL_AUTOCOMMIT_ON;
/* Initialize statement options to defaults */
/* Statements under this conn will inherit these options */
InitializeStatementOptions(&rv->stmtOptions);
InitializeARDFields(&rv->ardOptions);
InitializeAPDFields(&rv->apdOptions);
#ifdef _HANDLE_ENLIST_IN_DTC_
rv->asdum = NULL;
rv->gTranInfo = 0;
#endif /* _HANDLE_ENLIST_IN_DTC_ */
if (lockinit)
CC_lockinit(rv);
return rv;
cleanup:
CC_Destructor(rv);
return NULL;
}
ConnectionClass *
CC_Constructor()
{
ConnectionClass *rv, *retrv = NULL;
if (rv = CC_alloc(), NULL != rv)
retrv = CC_initialize(rv, TRUE);
return retrv;
}
char
CC_Destructor(ConnectionClass *self)
{
MYLOG(0, "entering self=%p\n", self);
if (self->status == CONN_EXECUTING)
return 0;
CC_cleanup(self, FALSE); /* cleanup socket and statements */
MYLOG(0, "after CC_Cleanup\n");
/* Free up statement holders */
if (self->stmts)
{
free(self->stmts);
self->stmts = NULL;
}
if (self->descs)
{
free(self->descs);
self->descs = NULL;
}
MYLOG(0, "after free statement holders\n");
NULL_THE_NAME(self->schemaIns);
NULL_THE_NAME(self->tableIns);
CC_conninfo_release(&self->connInfo);
if (self->__error_message)
free(self->__error_message);
DELETE_CONN_CS(self);
DELETE_CONNLOCK(self);
free(self);
MYLOG(0, "leaving\n");
return 1;
}
/* Return how many cursors are opened on this connection */
int
CC_cursor_count(ConnectionClass *self)
{
StatementClass *stmt;
int i,
count = 0;
QResultClass *res;
MYLOG(0, "self=%p, num_stmts=%d\n", self, self->num_stmts);
CONNLOCK_ACQUIRE(self);
for (i = 0; i < self->num_stmts; i++)
{
stmt = self->stmts[i];
if (stmt && (res = SC_get_Result(stmt)) && QR_get_cursor(res))
count++;
}
CONNLOCK_RELEASE(self);
MYLOG(0, "leaving %d\n", count);
return count;
}
void
CC_clear_error(ConnectionClass *self)
{
if (!self) return;
CONNLOCK_ACQUIRE(self);
self->__error_number = 0;
if (self->__error_message)
{
free(self->__error_message);
self->__error_message = NULL;
}
self->sqlstate[0] = '\0';
CONNLOCK_RELEASE(self);
}
void
CC_examine_global_transaction(ConnectionClass *self)
{
if (!self) return;
#ifdef _HANDLE_ENLIST_IN_DTC_
if (CC_is_in_global_trans(self))
CALL_IsolateDtcConn(self, TRUE);
#endif /* _HANDLE_ENLIST_IN_DTC_ */
}
CSTR bgncmd = "BEGIN";
CSTR cmtcmd = "COMMIT";
CSTR rbkcmd = "ROLLBACK";
CSTR svpcmd = "SAVEPOINT";
CSTR per_query_svp = "_per_query_svp_";
CSTR rlscmd = "RELEASE";
/*
* Used to begin a transaction.
*/
char
CC_begin(ConnectionClass *self)
{
char ret = TRUE;
if (!CC_is_in_trans(self))
{
QResultClass *res = CC_send_query(self, bgncmd, NULL, 0, NULL);
MYLOG(0, " sending BEGIN!\n");
ret = QR_command_maybe_successful(res);
QR_Destructor(res);
}
return ret;
}
/*
* Used to commit a transaction.
* We are almost always in the middle of a transaction.
*/
char
CC_commit(ConnectionClass *self)
{
char ret = TRUE;
if (CC_is_in_trans(self))
{
if (!CC_is_in_error_trans(self))
CC_close_eof_cursors(self);
if (CC_is_in_trans(self))
{
QResultClass *res = CC_send_query(self, cmtcmd, NULL, 0, NULL);
MYLOG(0, " sending COMMIT!\n");
ret = QR_command_maybe_successful(res);
QR_Destructor(res);
}
}
return ret;
}
/*
* Used to cancel a transaction.
* We are almost always in the middle of a transaction.
*/
char
CC_abort(ConnectionClass *self)
{
char ret = TRUE;
if (CC_is_in_trans(self))
{
QResultClass *res = CC_send_query(self, rbkcmd, NULL, 0, NULL);
MYLOG(0, " sending ABORT!\n");
ret = QR_command_maybe_successful(res);
QR_Destructor(res);
}
return ret;
}
/* This is called by SQLSetConnectOption etc also */
char
CC_set_autocommit(ConnectionClass *self, BOOL on)
{
BOOL currsts = CC_is_in_autocommit(self);
if ((on && currsts) ||
(!on && !currsts))
return on;
MYLOG(0, " %d->%d\n", currsts, on);
if (CC_is_in_trans(self))
CC_commit(self);
if (on)
self->transact_status |= CONN_IN_AUTOCOMMIT;
else
self->transact_status &= ~CONN_IN_AUTOCOMMIT;
return on;
}
/* Clear cached table info */
static void
CC_clear_col_info(ConnectionClass *self, BOOL destroy)
{
if (self->col_info)
{
int i;
COL_INFO *coli;
for (i = 0; i < self->ntables; i++)
{
/* Going through COL_INFO cache table and releasing coli objects. */
if (coli = self->col_info[i], NULL != coli)
{
MYLOG(0, "!!!refcnt %p:%d -> %d\n", coli, coli->refcnt, coli->refcnt - 1);
coli->refcnt--;
if (coli->refcnt <= 0)
{
/* Last reference to coli object disappeared. Now destroying it. */
free_col_info_contents(coli);
free(coli);
self->col_info[i] = NULL;
}
else
{
/* coli object have another reference to it, so it will be destroyed somewhere else. */
coli->acc_time = 0;
}
}
}
self->ntables = 0; /* Now we have cleared COL_INFO cached objects table. */
if (destroy)
{
/* We destroying COL_INFO cache completely. */
free(self->col_info);
self->col_info = NULL;
self->coli_allocated = 0;
}
}
}
static void
CC_set_locale_encoding(ConnectionClass *self, const char * encoding)
{
char *currenc = self->locale_encoding;
if (encoding)
self->locale_encoding = strdup(encoding);
else
self->locale_encoding = NULL;
if (currenc)
free(currenc);
}
static void
CC_determine_locale_encoding(ConnectionClass *self)
{
const char *dbencoding = PQparameterStatus(self->pqconn, "client_encoding");
const char *encoding;
QLOG(0, "PQparameterStatus(%p, \"client_encoding\")=%s\n", self->pqconn, SAFE_STR(dbencoding));
if (self->locale_encoding) /* already set */
return;
encoding = derive_locale_encoding(dbencoding);
if (!encoding)
encoding = "SQL_ASCII";
CC_set_locale_encoding(self, encoding);
}
static void
CC_set_client_encoding(ConnectionClass *self, const char * encoding)
{
char *currenc = self->original_client_encoding;
if (encoding)
{
self->original_client_encoding = strdup(encoding);
self->ccsc = pg_CS_code(encoding);
}
else
{
self->original_client_encoding = NULL;
self->ccsc = SQL_ASCII;
}
self->mb_maxbyte_per_char = pg_mb_maxlen(self->ccsc);
if (currenc)
free(currenc);
}
int
CC_send_client_encoding(ConnectionClass *self, const char * encoding)
{
const char *dbencoding = PQparameterStatus(self->pqconn, "client_encoding");
if (encoding && (!dbencoding || stricmp(encoding, dbencoding)))
{
char query[64];
QResultClass *res;
BOOL cmd_success;
SPRINTF_FIXED(query, "set client_encoding to '%s'", encoding);
res = CC_send_query(self, query, NULL, 0, NULL);
cmd_success = QR_command_maybe_successful(res);
QR_Destructor(res);
if (!cmd_success)
return SQL_ERROR;
}
CC_set_client_encoding(self, encoding);
return SQL_SUCCESS;
}
/* This is called by SQLDisconnect also */
char
CC_cleanup(ConnectionClass *self, BOOL keepCommunication)
{
int i;
StatementClass *stmt;
DescriptorClass *desc;
if (self->status == CONN_EXECUTING)
return FALSE;
MYLOG(0, "entering self=%p\n", self);
ENTER_CONN_CS(self);
/* Cancel an ongoing transaction */
/* We are always in the middle of a transaction, */
/* even if we are in auto commit. */
if (self->pqconn)
{
QLOG(0, "PQfinish: %p\n", self->pqconn);
PQfinish(self->pqconn);
self->pqconn = NULL;
}
MYLOG(0, "after PQfinish\n");
/* Free all the stmts on this connection */
for (i = 0; i < self->num_stmts; i++)
{
stmt = self->stmts[i];
if (stmt)
{
stmt->hdbc = NULL; /* prevent any more dbase interactions */
SC_Destructor(stmt);
self->stmts[i] = NULL;
}
}
/* Free all the descs on this connection */
for (i = 0; i < self->num_descs; i++)
{
desc = self->descs[i];
if (desc)
{
DC_get_conn(desc) = NULL; /* prevent any more dbase interactions */
DC_Destructor(desc);
free(desc);
self->descs[i] = NULL;
}
}
/* Check for translation dll */
#ifdef WIN32
if (!keepCommunication && self->translation_handle)
{
FreeLibrary(self->translation_handle);
self->translation_handle = NULL;
}
#endif
if (!keepCommunication)
{
self->status = CONN_NOT_CONNECTED;
self->transact_status = CONN_IN_AUTOCOMMIT;
self->unnamed_prepared_stmt = NULL;
}
if (!keepCommunication)
{
CC_conninfo_init(&(self->connInfo), CLEANUP_FOR_REUSE);
if (self->original_client_encoding)
{
free(self->original_client_encoding);
self->original_client_encoding = NULL;
}
if (self->locale_encoding)
{
free(self->locale_encoding);
self->locale_encoding = NULL;
}
if (self->server_encoding)
{
free(self->server_encoding);
self->server_encoding = NULL;
}
reset_current_schema(self);
}
/* Free cached table info */
CC_clear_col_info(self, TRUE);
if (self->num_discardp > 0 && self->discardp)
{
for (i = 0; i < self->num_discardp; i++)
free(self->discardp[i]);
self->num_discardp = 0;
}
if (self->discardp)
{
free(self->discardp);
self->discardp = NULL;
}
LEAVE_CONN_CS(self);
MYLOG(0, "leaving\n");
return TRUE;
}
int
CC_set_translation(ConnectionClass *self)
{
#ifdef WIN32
CSTR func = "CC_set_translation";
if (self->translation_handle != NULL)
{
FreeLibrary(self->translation_handle);
self->translation_handle = NULL;
}
if (self->connInfo.translation_dll[0] == 0)
return TRUE;
self->translation_option = atoi(self->connInfo.translation_option);
self->translation_handle = LoadLibrary(self->connInfo.translation_dll);
if (self->translation_handle == NULL)
{
CC_set_error(self, CONN_UNABLE_TO_LOAD_DLL, "Could not load the translation DLL.", func);
return FALSE;
}
self->DataSourceToDriver
= (DataSourceToDriverProc) GetProcAddress(self->translation_handle,
"SQLDataSourceToDriver");
self->DriverToDataSource
= (DriverToDataSourceProc) GetProcAddress(self->translation_handle,
"SQLDriverToDataSource");
if (self->DataSourceToDriver == NULL || self->DriverToDataSource == NULL)
{
CC_set_error(self, CONN_UNABLE_TO_LOAD_DLL, "Could not find translation DLL functions.", func);
return FALSE;
}
#endif
return TRUE;
}
#ifndef PG_DIAG_SEVERITY_NONLOCALIZED
#define PG_DIAG_SEVERITY_NONLOCALIZED 'V'
#endif
void
handle_pgres_error(ConnectionClass *self, const PGresult *pgres,
const char *comment,
QResultClass *res, BOOL error_not_a_notice)
{
char *errseverity;
char *errseverity_nonloc = NULL;
char *errprimary = NULL;
char *errdetail = NULL;
char *errhint = NULL;
char *errstatementposition = NULL;
char *errinternalquery = NULL;
char *errcontext = NULL;
char *errschemaname = NULL;
char *errtablename = NULL;
char *errcolumnname = NULL;
char *errdatatypename = NULL;
char *errmsg = NULL;
char *sqlstate = NULL;
int level = MIN_LOG_LEVEL;
int display_error_level = (self->connInfo).optional_errors ? 3 : 1;
PQExpBufferData errbuf = {0};
MYLOG(DETAIL_LOG_LEVEL, "entering\n");
sqlstate = PQresultErrorField(pgres, PG_DIAG_SQLSTATE);
if (res && pgres)
{
if (sqlstate)
STRCPY_FIXED(res->sqlstate, sqlstate);
}
if (NULL == pgres &&
NULL == self->pqconn)
{
const char *errmsg = "The connection has been lost";
MYLOG(0, "setting error message=%s\n", errmsg);
QLOG(0, "\t%ssetting error message=%s\n", __FUNCTION__, errmsg);
if (CC_get_errornumber(self) <= 0)
CC_set_error(self, CONNECTION_COMMUNICATION_ERROR, errmsg, comment);
if (res)
{
QR_set_rstatus(res, PORES_FATAL_ERROR);
QR_set_message(res, errmsg);
}
goto cleanup;
}
/*
* The full message with details and context and everything could
* be obtained with PQresultErrorMessage(). I think that would be
* more user-friendly, but for now, construct a message with
* severity and primary message, which is backwards compatible.
*/
errseverity = PQresultErrorField(pgres, PG_DIAG_SEVERITY);
if (PG_VERSION_GE(self, 9.6))
{
errseverity_nonloc = PQresultErrorField(pgres, PG_DIAG_SEVERITY_NONLOCALIZED);
MYLOG(0, "PG_DIAG_SEVERITY_NONLOCALIZED=%s\n", SAFE_STR(errseverity_nonloc));
}
if (!error_not_a_notice)
{
if (errseverity_nonloc)
{
if (stricmp(errseverity_nonloc, "NOTICE") != 0)
level = 1;
}
else if (errseverity)
{
if (stricmp(errseverity, "NOTICE") != 0)
level = 1;
}
}
errprimary = PQresultErrorField(pgres, PG_DIAG_MESSAGE_PRIMARY);
if (errseverity_nonloc)
QLOG(level, "\t%s(%s) %s '%s'\n", errseverity_nonloc, SAFE_STR(errseverity), SAFE_STR(sqlstate), SAFE_STR(errprimary));
else
QLOG(level, "\t(%s) %s '%s'\n", SAFE_STR(errseverity), SAFE_STR(sqlstate), SAFE_STR(errprimary));
if (errprimary == NULL)
{
/* Hmm. got no primary message. Check if there's a connection error */
if (self->pqconn)
errprimary = PQerrorMessage(self->pqconn);
if (errprimary == NULL)
errprimary = "no error information";
}
else if (display_error_level > 0)
{
errdetail = PQresultErrorField(pgres, PG_DIAG_MESSAGE_DETAIL);
errhint = PQresultErrorField(pgres, PG_DIAG_MESSAGE_HINT);
errstatementposition = PQresultErrorField(pgres, PG_DIAG_STATEMENT_POSITION);
errinternalquery = PQresultErrorField(pgres, PG_DIAG_INTERNAL_POSITION);
errcontext = PQresultErrorField(pgres, PG_DIAG_CONTEXT);
errschemaname = PQresultErrorField(pgres, PG_DIAG_SCHEMA_NAME);
errtablename = PQresultErrorField(pgres, PG_DIAG_TABLE_NAME);
errcolumnname = PQresultErrorField(pgres, PG_DIAG_COLUMN_NAME);
errdatatypename = PQresultErrorField(pgres, PG_DIAG_DATATYPE_NAME);
}
initPQExpBuffer(&errbuf);
if (errseverity && errprimary)
{
printfPQExpBuffer(&errbuf, "%s: %s", errseverity, errprimary);
if (display_error_level > 0 && errdetail)
appendPQExpBuffer(&errbuf, "\nDETAIL: %s", errdetail);
if (display_error_level > 1)
{
if (errhint)
appendPQExpBuffer(&errbuf, "\nHINT: %s", errhint);
}
if (display_error_level > 2)
{
if (errstatementposition)
appendPQExpBuffer(&errbuf, "\nSTATEMENT_POSITION: %s", errstatementposition);
if (errinternalquery)
appendPQExpBuffer(&errbuf, "\nINTERNAL_QUERY: %s", errinternalquery);
if (errcontext)
appendPQExpBuffer(&errbuf, "\nCONTEXT: %s", errcontext);
if (errschemaname)
appendPQExpBuffer(&errbuf, "\nSCHEMA_NAME: %s", errschemaname);
if (errtablename)
appendPQExpBuffer(&errbuf, "\nTABLE_NAME: %s", errtablename);
if (errcolumnname)
appendPQExpBuffer(&errbuf, "\nCOLUMN_NAME: %s", errcolumnname);
if (errdatatypename)
appendPQExpBuffer(&errbuf, "\nDATATYPE_NAME :%s", errdatatypename);
}
errmsg = errbuf.data;
}
if (errmsg == NULL)
errmsg = errprimary;
if (!error_not_a_notice) /* warning, notice, log etc */
{
MYLOG(0, "notice message %s\n", errmsg);
if (res)
{
if (QR_command_successful(res))
QR_set_rstatus(res, PORES_NONFATAL_ERROR); /* notice or warning */
QR_add_notice(res, errmsg); /* will dup this string */
}
goto cleanup;
}
MYLOG(0, "error message=%s(" FORMAT_SIZE_T ")\n", errmsg, strlen(errmsg));
if (res)
{
QR_set_rstatus(res, PORES_FATAL_ERROR); /* error or fatal */
if (errmsg[0])
QR_set_message(res, errmsg);
QR_set_aborted(res, TRUE);
}
/*
* If the error is continuable after rollback?
*/
if (PQstatus(self->pqconn) == CONNECTION_BAD)
{
CC_set_errornumber(self, CONNECTION_COMMUNICATION_ERROR);
CC_on_abort(self, CONN_DEAD); /* give up the connection */
}
else if ((errseverity_nonloc && strcmp(errseverity_nonloc, "FATAL") == 0) ||
(NULL == errseverity_nonloc && errseverity && strcmp(errseverity, "FATAL") == 0)) /* no */
{
CC_set_errornumber(self, CONNECTION_SERVER_REPORTED_SEVERITY_FATAL);
CC_on_abort(self, CONN_DEAD); /* give up the connection */
}
else /* yes */
{
CC_set_errornumber(self, CONNECTION_SERVER_REPORTED_SEVERITY_ERROR);
if (CC_is_in_trans(self))
CC_set_in_error_trans(self);
}
cleanup:
if (!PQExpBufferDataBroken(errbuf))
termPQExpBuffer(&errbuf);
LIBPQ_update_transaction_status(self);
}
void
receive_libpq_notice(void *arg, const PGresult *pgres)
{
if (arg != NULL)
{
notice_receiver_arg *nrarg = (notice_receiver_arg *) arg;