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postgresql/src/interfaces/odbc/connection.h

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/* File: connection.h
*
* Description: See "connection.c"
*
* Comments: See "notice.txt" for copyright and license information.
*
*/
#ifndef __CONNECTION_H__
#define __CONNECTION_H__
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "psqlodbc.h"
#ifndef WIN32
#include "iodbc.h"
#include "isql.h"
#include "isqlext.h"
#else
#include <windows.h>
#include <sql.h>
#include <sqlext.h>
#endif
typedef enum {
CONN_NOT_CONNECTED, /* Connection has not been established */
CONN_CONNECTED, /* Connection is up and has been established */
CONN_DOWN, /* Connection is broken */
CONN_EXECUTING /* the connection is currently executing a statement */
} CONN_Status;
/* These errors have general sql error state */
#define CONNECTION_SERVER_NOT_REACHED 101
#define CONNECTION_MSG_TOO_LONG 103
#define CONNECTION_COULD_NOT_SEND 104
#define CONNECTION_NO_SUCH_DATABASE 105
#define CONNECTION_BACKEND_CRAZY 106
#define CONNECTION_NO_RESPONSE 107
#define CONNECTION_SERVER_REPORTED_ERROR 108
#define CONNECTION_COULD_NOT_RECEIVE 109
#define CONNECTION_SERVER_REPORTED_WARNING 110
#define CONNECTION_NEED_PASSWORD 112
/* These errors correspond to specific SQL states */
#define CONN_INIREAD_ERROR 201
#define CONN_OPENDB_ERROR 202
#define CONN_STMT_ALLOC_ERROR 203
#define CONN_IN_USE 204
#define CONN_UNSUPPORTED_OPTION 205
/* Used by SetConnectoption to indicate unsupported options */
#define CONN_INVALID_ARGUMENT_NO 206
/* SetConnectOption: corresponds to ODBC--"S1009" */
#define CONN_TRANSACT_IN_PROGRES 207
#define CONN_NO_MEMORY_ERROR 208
#define CONN_NOT_IMPLEMENTED_ERROR 209
#define CONN_INVALID_AUTHENTICATION 210
#define CONN_AUTH_TYPE_UNSUPPORTED 211
#define CONN_UNABLE_TO_LOAD_DLL 212
#define CONN_OPTION_VALUE_CHANGED 213
#define CONN_VALUE_OUT_OF_RANGE 214
#define CONN_TRUNCATED 215
/* Conn_status defines */
#define CONN_IN_AUTOCOMMIT 0x01
#define CONN_IN_TRANSACTION 0x02
/* AutoCommit functions */
#define CC_set_autocommit_off(x) (x->transact_status &= ~CONN_IN_AUTOCOMMIT)
#define CC_set_autocommit_on(x) (x->transact_status |= CONN_IN_AUTOCOMMIT)
#define CC_is_in_autocommit(x) (x->transact_status & CONN_IN_AUTOCOMMIT)
/* Transaction in/not functions */
#define CC_set_in_trans(x) (x->transact_status |= CONN_IN_TRANSACTION)
#define CC_set_no_trans(x) (x->transact_status &= ~CONN_IN_TRANSACTION)
#define CC_is_in_trans(x) (x->transact_status & CONN_IN_TRANSACTION)
/* Authentication types */
#define AUTH_REQ_OK 0
#define AUTH_REQ_KRB4 1
#define AUTH_REQ_KRB5 2
#define AUTH_REQ_PASSWORD 3
#define AUTH_REQ_CRYPT 4
/* Startup Packet sizes */
#define SM_DATABASE 64
#define SM_USER 32
#define SM_OPTIONS 64
#define SM_UNUSED 64
#define SM_TTY 64
/* Old 6.2 protocol defines */
#define NO_AUTHENTICATION 7
#define PATH_SIZE 64
#define ARGV_SIZE 64
#define NAMEDATALEN 16
typedef unsigned int ProtocolVersion;
#define PG_PROTOCOL(major, minor) (((major) << 16) | (minor))
#define PG_PROTOCOL_LATEST PG_PROTOCOL(2, 0)
#define PG_PROTOCOL_63 PG_PROTOCOL(1, 0)
#define PG_PROTOCOL_62 PG_PROTOCOL(0, 0)
/* This startup packet is to support latest Postgres protocol (6.4, 6.3) */
typedef struct _StartupPacket
{
ProtocolVersion protoVersion;
char database[SM_DATABASE];
char user[SM_USER];
char options[SM_OPTIONS];
char unused[SM_UNUSED];
char tty[SM_TTY];
} StartupPacket;
/* This startup packet is to support pre-Postgres 6.3 protocol */
typedef struct _StartupPacket6_2
{
unsigned int authtype;
char database[PATH_SIZE];
char user[NAMEDATALEN];
char options[ARGV_SIZE];
char execfile[ARGV_SIZE];
char tty[PATH_SIZE];
} StartupPacket6_2;
/* Structure to hold all the connection attributes for a specific
connection (used for both registry and file, DSN and DRIVER)
*/
typedef struct {
char dsn[MEDIUM_REGISTRY_LEN];
char desc[MEDIUM_REGISTRY_LEN];
char driver[MEDIUM_REGISTRY_LEN];
char server[MEDIUM_REGISTRY_LEN];
char database[MEDIUM_REGISTRY_LEN];
char username[MEDIUM_REGISTRY_LEN];
char password[MEDIUM_REGISTRY_LEN];
char conn_settings[LARGE_REGISTRY_LEN];
char protocol[SMALL_REGISTRY_LEN];
char port[SMALL_REGISTRY_LEN];
char onlyread[SMALL_REGISTRY_LEN];
char fake_oid_index[SMALL_REGISTRY_LEN];
char show_oid_column[SMALL_REGISTRY_LEN];
char row_versioning[SMALL_REGISTRY_LEN];
char show_system_tables[SMALL_REGISTRY_LEN];
char translation_dll[MEDIUM_REGISTRY_LEN];
char translation_option[SMALL_REGISTRY_LEN];
char focus_password;
} ConnInfo;
/* Macro to determine is the connection using 6.2 protocol? */
#define PROTOCOL_62(conninfo_) (strncmp((conninfo_)->protocol, PG62, strlen(PG62)) == 0)
/* Macro to determine is the connection using 6.3 protocol? */
#define PROTOCOL_63(conninfo_) (strncmp((conninfo_)->protocol, PG63, strlen(PG63)) == 0)
/* This is used to store cached table information in the connection */
struct col_info {
QResultClass *result;
char name[MAX_TABLE_LEN+1];
};
/* Translation DLL entry points */
#ifdef WIN32
#define DLLHANDLE HINSTANCE
#else
#define WINAPI CALLBACK
#define DLLHANDLE void *
#define HINSTANCE void *
#endif
typedef BOOL (FAR WINAPI *DataSourceToDriverProc) (UDWORD,
SWORD,
PTR,
SDWORD,
PTR,
SDWORD,
SDWORD FAR *,
UCHAR FAR *,
SWORD,
SWORD FAR *);
typedef BOOL (FAR WINAPI *DriverToDataSourceProc) (UDWORD,
SWORD,
PTR,
SDWORD,
PTR,
SDWORD,
SDWORD FAR *,
UCHAR FAR *,
SWORD,
SWORD FAR *);
/******* The Connection handle ************/
struct ConnectionClass_ {
HENV henv; /* environment this connection was created on */
StatementOptions stmtOptions;
char *errormsg;
int errornumber;
CONN_Status status;
ConnInfo connInfo;
StatementClass **stmts;
int num_stmts;
SocketClass *sock;
int lobj_type;
int ntables;
COL_INFO **col_info;
long translation_option;
HINSTANCE translation_handle;
DataSourceToDriverProc DataSourceToDriver;
DriverToDataSourceProc DriverToDataSource;
char transact_status; /* Is a transaction is currently in progress */
char errormsg_created; /* has an informative error msg been created? */
};
/* Accessor functions */
#define CC_get_socket(x) (x->sock)
#define CC_get_database(x) (x->connInfo.database)
#define CC_get_server(x) (x->connInfo.server)
#define CC_get_DSN(x) (x->connInfo.dsn)
#define CC_get_username(x) (x->connInfo.username)
#define CC_is_onlyread(x) (x->connInfo.onlyread[0] == '1')
/* for CC_DSN_info */
#define CONN_DONT_OVERWRITE 0
#define CONN_OVERWRITE 1
/* prototypes */
ConnectionClass *CC_Constructor(void);
char CC_Destructor(ConnectionClass *self);
int CC_cursor_count(ConnectionClass *self);
char CC_cleanup(ConnectionClass *self);
char CC_abort(ConnectionClass *self);
int CC_set_translation (ConnectionClass *self);
char CC_connect(ConnectionClass *self, char do_password);
char CC_add_statement(ConnectionClass *self, StatementClass *stmt);
char CC_remove_statement(ConnectionClass *self, StatementClass *stmt);
char CC_get_error(ConnectionClass *self, int *number, char **message);
QResultClass *CC_send_query(ConnectionClass *self, char *query, QueryInfo *qi);
void CC_clear_error(ConnectionClass *self);
char *CC_create_errormsg(ConnectionClass *self);
int CC_send_function(ConnectionClass *conn, int fnid, void *result_buf, int *actual_result_len, int result_is_int, LO_ARG *argv, int nargs);
char CC_send_settings(ConnectionClass *self);
void CC_lookup_lo(ConnectionClass *conn);
void CC_log_error(char *func, char *desc, ConnectionClass *self);
#endif
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