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Wt
3.3.0
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A PostgreSQL connection. More...
#include <Wt/Dbo/backend/Postgres>

Public Member Functions | |
| Postgres () | |
| Creates new PostgreSQL backend connection. | |
| Postgres (const std::string &db) | |
| Opens a new PostgreSQL backend connection. | |
| Postgres (const Postgres &other) | |
| Copies a PostgreSQL connection. | |
| ~Postgres () | |
| Destructor. | |
| virtual Postgres * | clone () const |
| Clones the connection. | |
| bool | connect (const std::string &db) |
| Tries to connect. | |
| PGconn * | connection () |
| Returns the underlying connection. | |
| virtual void | executeSql (const std::string &sql) |
| Executes an SQL statement. | |
| virtual void | startTransaction () |
| Starts a transaction. | |
| virtual void | commitTransaction () |
| Commits a transaction. | |
| virtual void | rollbackTransaction () |
| Rolls back a transaction. | |
| virtual SqlStatement * | prepareStatement (const std::string &sql) |
| Prepares a statement. | |
Methods that return dialect information | |
| virtual std::string | autoincrementSql () const |
| Returns the 'autoincrement' SQL type modifier. | |
| virtual std::vector< std::string > | autoincrementCreateSequenceSql (const std::string &table, const std::string &id) const |
| Returns the SQL statement(s) required to create an id sequence. | |
| virtual std::vector< std::string > | autoincrementDropSequenceSql (const std::string &table, const std::string &id) const |
| Returns the SQL statement(s) required to drop an id sequence. | |
| virtual std::string | autoincrementType () const |
| Returns the 'autoincrement' SQL type. | |
| virtual std::string | autoincrementInsertSuffix () const |
| Returns the suffix for an 'autoincrement' insert statement. | |
| virtual const char * | dateTimeType (SqlDateTimeType type) const |
| Returns the date/time type. | |
| virtual const char * | blobType () const |
| Returns the blob type. | |
| virtual bool | supportAlterTable () const |
| Returns true if the backend support Alter Table. | |
A PostgreSQL connection.
This class provides the backend implementation for PostgreSQL databases.
When applicable, exceptions from the backend will return the five-character SQLSTATE error codes, as in http://www.postgresql.org/docs/8.1/static/errcodes-appendix.html, in Exception::code().
| Wt::Dbo::backend::Postgres::Postgres | ( | ) |
Creates new PostgreSQL backend connection.
The connection is not yet open, and requires a connect() before it can be used.
| Wt::Dbo::backend::Postgres::Postgres | ( | const std::string & | db | ) |
Opens a new PostgreSQL backend connection.
The db may be any of the values supported by PQconnectdb().
| Wt::Dbo::backend::Postgres::Postgres | ( | const Postgres & | other | ) |
Copies a PostgreSQL connection.
This creates a new connection with the same settings as another connection.
| Wt::Dbo::backend::Postgres::~Postgres | ( | ) |
Destructor.
Closes the connection.
| std::vector< std::string > Wt::Dbo::backend::Postgres::autoincrementCreateSequenceSql | ( | const std::string & | table, |
| const std::string & | id | ||
| ) | const [virtual] |
Returns the SQL statement(s) required to create an id sequence.
This is used by Session::createTables() to create the id sequence for a table. The table's name and primary key are passed as arguments to this function and can be used to construct an SQL sequence that is unique for the table.
Implements Wt::Dbo::SqlConnection.
| std::vector< std::string > Wt::Dbo::backend::Postgres::autoincrementDropSequenceSql | ( | const std::string & | table, |
| const std::string & | id | ||
| ) | const [virtual] |
Returns the SQL statement(s) required to drop an id sequence.
This is used by Session::dropTables() to drop the id sequence for a table. The table's name and primary key are passed as arguments to this function and can be used to construct an SQL sequence that is unique for the table.
Implements Wt::Dbo::SqlConnection.
| std::string Wt::Dbo::backend::Postgres::autoincrementInsertSuffix | ( | ) | const [virtual] |
Returns the suffix for an 'autoincrement' insert statement.
This is appended to the insert statement, since some back-ends need to be indicated that they should return the autoincrement id.
Implements Wt::Dbo::SqlConnection.
| std::string Wt::Dbo::backend::Postgres::autoincrementSql | ( | ) | const [virtual] |
Returns the 'autoincrement' SQL type modifier.
This is used by Session::createTables() to create the id column.
Implements Wt::Dbo::SqlConnection.
| std::string Wt::Dbo::backend::Postgres::autoincrementType | ( | ) | const [virtual] |
Returns the 'autoincrement' SQL type.
This is used by Session::createTables() to create the id column.
Implements Wt::Dbo::SqlConnection.
| const char * Wt::Dbo::backend::Postgres::blobType | ( | ) | const [virtual] |
Returns the blob type.
Implements Wt::Dbo::SqlConnection.
| Postgres * Wt::Dbo::backend::Postgres::clone | ( | ) | const [virtual] |
Clones the connection.
Returns a new connection object that is configured like this object. This is used by connection pool implementations to create its connections.
Implements Wt::Dbo::SqlConnection.
| void Wt::Dbo::backend::Postgres::commitTransaction | ( | ) | [virtual] |
| bool Wt::Dbo::backend::Postgres::connect | ( | const std::string & | db | ) |
Tries to connect.
Throws an exception if there was a problem, otherwise true. An example connecion string could be: "host=127.0.0.1 user=test password=test port=5432 dbname=test"
| const char * Wt::Dbo::backend::Postgres::dateTimeType | ( | SqlDateTimeType | type | ) | const [virtual] |
Returns the date/time type.
Implements Wt::Dbo::SqlConnection.
| void Wt::Dbo::backend::Postgres::executeSql | ( | const std::string & | sql | ) | [virtual] |
Executes an SQL statement.
This is a convenience method for preparing a statement, executing it, and deleting it.
Reimplemented from Wt::Dbo::SqlConnection.
| SqlStatement * Wt::Dbo::backend::Postgres::prepareStatement | ( | const std::string & | sql | ) | [virtual] |
| void Wt::Dbo::backend::Postgres::rollbackTransaction | ( | ) | [virtual] |
Rolls back a transaction.
This function rolls back a transaction.
Implements Wt::Dbo::SqlConnection.
| void Wt::Dbo::backend::Postgres::startTransaction | ( | ) | [virtual] |
| bool Wt::Dbo::backend::Postgres::supportAlterTable | ( | ) | const [virtual] |
Returns true if the backend support Alter Table.
This method will return false by default.
Reimplemented from Wt::Dbo::SqlConnection.
1.7.5.1