Module functions and constants

connect – Open a PostgreSQL connection

Y

-

get_pqlib_version – get the version of libpq

Y

-

get/set_defhost – default server host [DV]

Y

-

get/set_defport – default server port [DV]

Y

-

get/set_defopt – default connection options [DV]

Y

-

get/set_defbase – default database name [DV]

Y

-

get/set_defuser – default database user [DV]

Y

-

get/set_defpasswd – default database password [DV]

Y

-

escape_string – escape a string for use within SQL

Y

-

escape_bytea – escape binary data for use within SQL

Y

-

unescape_bytea – unescape data that has been retrieved as text

Y

-

get/set_namedresult – conversion to named tuples

Y

-

get/set_decimal – decimal type to be used for numeric values

Y

-

get/set_decimal_point – decimal mark used for monetary values

Y

-

get/set_bool – whether boolean values are returned as bool objects

Y

-

get/set_array – whether arrays are returned as list objects

Y

-

get/set_bytea_escaped – whether bytea data is returned escaped

Y

-

get/set_jsondecode – decoding JSON format

Y

-

get/set_cast_hook – fallback typecast function

Y

-

get/set_datestyle – assume a fixed date style

Y

-

get/set_typecast – custom typecasting

Y

-

cast_array/record – fast parsers for arrays and records

Y

-

Type helpers

Y

-

Module constants

Y

-

Connection – The connection object

query – execute a SQL command string

Y

-

send_query - executes a SQL command string asynchronously

Y

-

query_prepared – execute a prepared statement

Y

-

prepare – create a prepared statement

Y

-

describe_prepared – describe a prepared statement

Y

-

reset – reset the connection

Y

-

poll - completes an asynchronous connection

Y

-

cancel – abandon processing of current SQL command

Y

-

close – close the database connection

Y

-

transaction – get the current transaction state

Y

-

parameter – get a current server parameter setting

Y

-

date_format – get the currently used date format

Y

-

fileno – get the socket used to connect to the database

Y

-

set_non_blocking - set the non-blocking status of the connection

Y

-

is_non_blocking - report the blocking status of the connection

Y

-

getnotify – get the last notify from the server

N

数据库不支持listen/notify。

inserttable – insert a list into a table

Y

copy命令中如果有\n，请使用双引号引用此字段。

get/set_notice_receiver – custom notice receiver

Y

-

putline – write a line to the server socket [DA]

Y

-

getline – get a line from server socket [DA]

Y

-

endcopy – synchronize client and server [DA]

Y

-

locreate – create a large object in the database [LO]

N

大对象相关操作。

getlo – build a large object from given oid [LO]

N

大对象相关操作。

loimport – import a file to a large object [LO]

N

大对象相关操作。

Object attributes

Y

-

The DB wrapper class

Initialization

Y

-

pkey – return the primary key of a table

Y

-

get_databases – get list of databases in the system

Y

-

get_relations – get list of relations in connected database

Y

-

get_tables – get list of tables in connected database

Y

-

get_attnames – get the attribute names of a table

Y

-

has_table_privilege – check table privilege

Y

-

get/set_parameter – get or set run-time parameters

Y

-

begin/commit/rollback/savepoint/release – transaction handling

Y

-

get – get a row from a database table or view

Y

-

insert – insert a row into a database table

Y

-

update – update a row in a database table

Y

-

upsert – insert a row with conflict resolution

Y

-

query – execute a SQL command string

Y

-

query_formatted – execute a formatted SQL command string

Y

-

query_prepared – execute a prepared statement

Y

-

prepare – create a prepared statement

Y

-

describe_prepared – describe a prepared statement

Y

-

delete_prepared – delete a prepared statement

Y

-

clear – clear row values in memory

Y

-

delete – delete a row from a database table

Y

元组必须有唯一键或者主键。

truncate – quickly empty database tables

Y

-

get_as_list/dict – read a table as a list or dictionary

Y

-

escape_literal/identifier/string/bytea – escape for SQL

Y

-

unescape_bytea – unescape data retrieved from the database

Y

-

encode/decode_json – encode and decode JSON data

Y

-

use_regtypes – determine use of regular type names

Y

-

notification_handler – create a notification handler

N

数据库不支持listen/notify。

Attributes of the DB wrapper class

Y

-

Query methods

getresult – get query values as list of tuples

Y

-

dictresult/dictiter – get query values as dictionaries

Y

-

namedresult/namediter – get query values as named tuples

Y

-

scalarresult/scalariter – get query values as scalars

Y

-

one/onedict/onenamed/onescalar – get one result of a query

Y

-

single/singledict/singlenamed/singlescalar – get single result of a query

Y

-

listfields – list fields names of previous query result

Y

-

fieldname, fieldnum – field name/number conversion

Y

-

fieldinfo – detailed info about query result fields

Y

-

ntuples – return number of tuples in query object

Y

-

memsize – return number of bytes allocated by query result

Y

-

LargeObject – Large Objects

open – open a large object

N

大对象相关操作。

close – close a large object

N

大对象相关操作。

read, write, tell, seek, unlink – file-like large object handling

N

大对象相关操作。

size – get the large object size

N

大对象相关操作。

export – save a large object to a file

N

大对象相关操作。

Object attributes

N

大对象相关操作。

The Notification Handler

Instantiating the notification handler

N

数据库不支持listen/notify。

Invoking the notification handler

N

数据库不支持listen/notify。

Sending notifications

N

数据库不支持listen/notify。

Auxiliary methods

N

数据库不支持listen/notify。

pgdb

Module functions and constants

connect – Open a PostgreSQL connection

Y

-

get/set/reset_typecast – Control the global typecast functions

Y

-

Module constants

Y

-

Errors raised by this module

Y

-

Connection – The connection object

close – close the connection

Y

-

commit – commit the connection

Y

-

rollback – roll back the connection

Y

-

cursor – return a new cursor object

Y

-

Attributes that are not part of the standard

Y

-

Cursor – The cursor object

description – details regarding the result columns

Y

-

rowcount – number of rows of the result

Y

-

close – close the cursor

Y

-

execute – execute a database operation

Y

-

executemany – execute many similar database operations

Y

-

callproc – Call a stored procedure

Y

-

fetchone – fetch next row of the query result

Y

-

fetchmany – fetch next set of rows of the query result

Y

-

fetchall – fetch all rows of the query result

Y

-

arraysize - the number of rows to fetch at a time

Y

-

Methods and attributes that are not part of the standard

Y

-

Type – Type objects and constructors

Type constructors

Y

-

Type objects

Y

-