--- sql/pgsql/parser3pgsql.C 2008/06/26 15:49:40 1.30 +++ sql/pgsql/parser3pgsql.C 2008/12/25 02:33:56 1.34 @@ -7,7 +7,7 @@ 2007.10.25 using PgSQL 8.1.5 */ -static const char *RCSId="$Id: parser3pgsql.C,v 1.30 2008/06/26 15:49:40 misha Exp $"; +static const char *RCSId="$Id: parser3pgsql.C,v 1.34 2008/12/25 02:33:56 misha Exp $"; #include "config_includes.h" @@ -16,17 +16,30 @@ static const char *RCSId="$Id: parser3pg #include #include -// OIDOID from catalog/pg_type.h +// from catalog/pg_type.h +#define BOOLOID 16 +#define INT8OID 20 +#define INT2OID 21 +#define INT4OID 23 #define OIDOID 26 +#define FLOAT4OID 700 +#define FLOAT8OID 701 +#define DATEOID 1082 +#define TIMEOID 1083 +#define TIMESTAMPOID 1114 +#define TIMESTAMPTZOID 1184 +#define TIMETZOID 1266 +#define NUMERICOID 1700 + // LO_BUFSIZE from interfaces\libpq\fe-lobj.c = 8192 (0x2000) // actually writing chunks of that size failed, reduced it twice #define LO_BUFSIZE 0x1000 -// from postgres_ext.h -//#define InvalidOid ((Oid) 0) #include "ltdl.h" +#define MAX_COLS 500 + #define MAX_STRING 0x400 #define MAX_NUMBER 20 @@ -78,6 +91,7 @@ struct Connection { PGconn *conn; const char* client_charset; bool autocommit; + bool without_default_transactions; }; /** @@ -111,8 +125,8 @@ public: ClientCharset=charset& // transcode by parser charset=value& // transcode by server with 'SET CLIENT_ENCODING=value' datestyle=value& // 'SET DATESTYLE=value' available values are: ISO|SQL|Postgres|European|US|German [default=ISO] - autocommit=1& - WithoutDefaultTransaction=1 // == autocommit=0 + autocommit=1& // each transaction is commited automatically (default) + WithoutDefaultTransaction=0 // 1 -- disable any BEGIN TRAN/COMMIT/ROLLBACK [can NOT be used with autocommit option] */ void connect( char* url, @@ -135,6 +149,8 @@ public: connection.services=&services; connection.client_charset=0; connection.autocommit=true; + connection.without_default_transactions=false; + connection.conn=PQsetdbLogin( (host&&strcasecmp(host, "local")==0)?NULL/* local Unix domain socket */:host, port, NULL, NULL, db, user, pwd); @@ -149,19 +165,25 @@ public: if(char *key=lsplit(&options, '&')){ if(*key){ if(char *value=lsplit(key, '=')){ - if(strcmp(key, "ClientCharset")==0){ // transcoding with parser + if(strcmp(key, "ClientCharset")==0){ toupper_str(value, value, strlen(value)); connection.client_charset=value; - } else if(strcasecmp(key, "charset")==0){ // transcoding with server + } else if(strcasecmp(key, "charset")==0){ charset=value; } else if(strcasecmp(key, "datestyle")==0){ datestyle=value; } else if(strcasecmp(key, "autocommit")==0){ + if(connection.without_default_transactions) + services._throw("options WithoutDefaultTransaction and autocommit can't be used together"); if(atoi(value)==0) connection.autocommit=false; - } else if(strcmp(key, "WithoutDefaultTransaction")==0){ // backward, use autocommit=0 - if(atoi(value)==1) + } else if(strcmp(key, "WithoutDefaultTransaction")==0){ + if(!connection.autocommit) + services._throw("options WithoutDefaultTransaction and autocommit can't be used together"); + if(atoi(value)==1){ + connection.without_default_transactions=true; connection.autocommit=false; + } } else services._throw("unknown connect option" /*key*/); } else @@ -184,7 +206,7 @@ public: _execute_cmd(connection, statement); } - _begin_transaction(connection); + _transaction_begin(connection); } void disconnect(void *aconnection){ @@ -195,18 +217,14 @@ public: void commit(void *aconnection){ Connection& connection=*static_cast(aconnection); - if(connection.autocommit){ - _execute_cmd(connection, "COMMIT"); - } - _begin_transaction(connection); + _transaction_commit(connection); + _transaction_begin(connection); } void rollback(void *aconnection){ Connection& connection=*static_cast(aconnection); - if(connection.autocommit){ - _execute_cmd(connection, "ROLLBACK"); - } - _begin_transaction(connection); + _transaction_rollback(connection); + _transaction_begin(connection); } bool ping(void *aconnection) { @@ -230,11 +248,12 @@ public: SQL_Driver_query_event_handlers& handlers ){ Connection& connection=*static_cast(aconnection); - const char* client_charset=connection.client_charset; SQL_Driver_services& services=*connection.services; PGconn *conn=connection.conn; - bool transcode_needed=_transcode_required(connection); + const char* client_charset=connection.client_charset; + const char* request_charset=services.request_charset(); + bool transcode_needed=client_charset && strcmp(client_charset, request_charset)!=0; const char** paramValues; if(placeholders_count>0){ @@ -243,13 +262,13 @@ public: _bind_parameters(placeholders_count, placeholders, paramValues, connection, transcode_needed); } - // transcode query from $request:charset to ?ClientCharset if(transcode_needed){ + // transcode query from $request:charset to ?ClientCharset size_t length=strlen(astatement); services.transcode(astatement, length, astatement, length, - services.request_charset(), - connection.client_charset); + request_charset, + client_charset); } const char *statement=_preprocess_statement(connection, astatement, offset, limit); @@ -264,12 +283,17 @@ public: if(!res) throwPQerror; + bool failed=false; + SQL_Error sql_error; + switch(PQresultStatus(res)) { case PGRES_EMPTY_QUERY: PQclear_throw("no query"); break; case PGRES_COMMAND_OK: // empty result: insert|delete|update|... PQclear(res); + if(connection.autocommit) + commit(aconnection); return; case PGRES_TUPLES_OK: break; @@ -278,31 +302,54 @@ public: break; } - int column_count=PQnfields(res); - if(!column_count) - PQclear_throw("result contains no columns"); - - bool failed=false; - SQL_Error sql_error; #define CHECK(afailed) \ if(afailed) { \ failed=true; \ goto cleanup; \ } + int column_count=PQnfields(res); + if(!column_count) + PQclear_throw("result contains no columns"); + + if(column_count>MAX_COLS) + column_count=MAX_COLS; + + unsigned int column_types[MAX_COLS]; + bool transcode_column[MAX_COLS]; + for(int i=0; i=0) { - // seek to end - if(lo_lseek(conn, fd, 0, SEEK_END)<0) - PQclear_throwPQerror; - // get length - int size_tell=lo_tell(conn, fd); - if(size_tell<0) - PQclear_throwPQerror; - // seek to begin - if(lo_lseek(conn, fd, 0, SEEK_SET)<0) - PQclear_throwPQerror; - length=(size_t)size_tell; - if(length) { - // read + switch(column_types[i]){ + case OIDOID: + { + char *error_pos=0; + Oid oid=cell?atoi(cell):0; + int fd=lo_open(conn, oid, INV_READ); + if(fd>=0){ + // seek to end + if(lo_lseek(conn, fd, 0, SEEK_END)<0) + PQclear_throwPQerror; + // get length + int size_tell=lo_tell(conn, fd); + if(size_tell<0) + PQclear_throwPQerror; + // seek to begin + if(lo_lseek(conn, fd, 0, SEEK_SET)<0) + PQclear_throwPQerror; + length=(size_t)size_tell; + if(length){ + // read + char* strm=(char*)services.malloc(length+1); + if(!lo_read_ex(conn, fd, strm, size_tell)) + PQclear_throw("lo_read can not read all bytes of object"); + strm[length]=0; + str=strm; + } else + str=0; + if(lo_close(conn, fd)<0) + PQclear_throwPQerror; + } else + PQclear_throwPQerror; + } + default: + // normal column, read it normally + length=(size_t)PQgetlength(res, r, i); + if(length){ char* strm=(char*)services.malloc(length+1); - if(!lo_read_ex(conn, fd, strm, size_tell)) - PQclear_throw("lo_read can not read all bytes of object"); - strm[length]=0; + memcpy(strm, cell, length+1); str=strm; } else str=0; - if(lo_close(conn, fd)<0) - PQclear_throwPQerror; - } else - PQclear_throwPQerror; - } else { - // normal column, read it normally - length=(size_t)PQgetlength(res, r, i); - if(length) { - char* strm=(char*)services.malloc(length+1); - memcpy(strm, cell, length+1); - str=strm; - } else - str=0; } - if(transcode_needed && str && length){ + if(str && length && transcode_column[i]){ // transcode cell value from ?ClientCharset to $request:charset services.transcode(str, length, str, length, - connection.client_charset, - services.request_charset()); + client_charset, + request_charset); } CHECK(handlers.add_row_cell(sql_error, str, length)); @@ -373,6 +422,9 @@ cleanup: PQclear(res); if(failed) services._throw(sql_error); + + if(connection.autocommit) + commit(aconnection); } private: @@ -387,13 +439,13 @@ private: Placeholder& ph=placeholders[i]; if(transcode_needed){ size_t name_length; - size_t value_length; connection.services->transcode(ph.name, strlen(ph.name), ph.name, name_length, connection.services->request_charset(), connection.client_charset); if(ph.value) { + size_t value_length; connection.services->transcode(ph.value, strlen(ph.value), ph.value, value_length, connection.services->request_charset(), @@ -401,7 +453,7 @@ private: } } int name_numner=atoi(ph.name); - if(name_numner <= 0 || name_numner > placeholders_count) + if(name_numner <= 0 || (size_t)name_numner > placeholders_count) connection.services->_throw("bad bind parameter key"); paramValues[name_numner-1]=ph.value; @@ -409,21 +461,31 @@ private: } - /** - Executes a query and throw away the result. - */ + void _transaction_begin(Connection& connection){ + _execute_transactions_cmd(connection, "BEGIN"); + } + + void _transaction_commit(Connection& connection){ + _execute_transactions_cmd(connection, "COMMIT"); + } + + void _transaction_rollback(Connection& connection){ + _execute_transactions_cmd(connection, "ROLLBACK"); + } + + void _execute_transactions_cmd(const Connection& connection, const char *query){ + if(!connection.without_default_transactions) // with option ?WithoutDefaultTransaction=1 user must execute BEGIN/COMMIT/ROLLBACK by himself + _execute_cmd(connection, query); + } + + // executes a query and throw away the result. void _execute_cmd(const Connection& connection, const char *query){ if(PGresult *res=PQexec(connection.conn, query)) - PQclear(res); // throw out the result [don't need but must call] + PQclear(res); // throw away the result [don't need but must call] else throwPQerror; } - void _begin_transaction(Connection& connection){ - if(connection.autocommit) - _execute_cmd(connection, "BEGIN"); - } - const char *_preprocess_statement( Connection& connection, const char *astatement, @@ -510,10 +572,6 @@ private: return result; } - bool _transcode_required(Connection& connection){ - return (connection.client_charset && strcmp(connection.client_charset, connection.services->request_charset())!=0); - } - private: // lo_read/write exchancements bool lo_read_ex(PGconn *conn, int fd, const/*paf*/ char *buf, size_t len) {