pgpool-II 4.0.6 Documentation
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pgproto

Name

pgproto --  tests PostgreSQL or any other servers that understand the frontend/backend protocol.

Synopsis

pgproto [option...]

Description

pgproto tests PostgreSQL or any other servers that understand the frontend/backend protocol.

Options

-h hostname
--hostname=hostname

The host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix-domain socket (default: Unix-domain socket).

-p port
--port=port

The port number (default:5432).

-u username
--user=username

The user name (default: OS user name).

-d databasename
--database=databasename

The database name (default: same as user).

-f filename
--proto-data-file=filename

Text file describing message data to be sent to PostgreSQL (default: pgproto.data).

-r naptime
--read-nap=naptime

The nap time in micro seconds (default:0). Greater than 0 will let pgproto sleep between each data reading from socket. This is useful to simulate slow clients.

-D
--debug

Enable debug message.

-v
--version

Print the command version, then exit.

-?
--help

Shows help for the command line arguments, then exit.

Example

In the example below, the first character in the file (i.e. 'Q') indicates the message kind specified in the PostgreSQL frontend/backend protocol.

Exceptions are 'Y' and 'y'. 'Y' reads messages from backend until 'Ready for query' is received. 'y' reads messages from backend while messages are coming from backend then stops if messages are not available for 1 second. 'Y' is used for waiting for reply of 'Q' (simple query) or after 'S' (sync) in extended queries. 'y' can be used for receiving messages after 'H' (flush).

If you want to include a " (double quotation) in a string data type, for example "SELECT * FROM "aaa"", you can qualify it by using \ (back slash) like ""SELECT * FROM "aaa"" A command line spread over multiple lines can be created using \ as well. 

'Q' "SELECT * FROM aaa \
WHERE a = 1"

Here is an example input file: 

#
# Test data example
#
'Q'	"SELECT * FROM aaa"
'Y'
'P'	"S1"	"BEGIN"	0
'B'	""	"S1"	0	0	0
'E'	""	0
'C'	'S'	"S1"
'P'	"foo"	"SELECT 1"	0
'B'	"myportal"	"foo"	0	0	0
'E'	"myportal"	0
'P'	"S2"	"COMMIT"	0
'B'	""	"S2"	0	0	0
'E'	""	0
'C'	'S'	"S2"
'S'
'Y'
'X'

Here is an example output: 

$ pgproto -p 11000 -d test -f sample.data
FE=> Query (query="SELECT * FROM aaa")
<= BE RowDescription
<= BE CommandComplete(SELECT 0)
<= BE ReadyForQuery(I)
FE=> Parse(stmt="S1", query="BEGIN")
FE=> Bind(stmt="S1", portal="")
FE=> Execute(portal="")
FE=> Close(stmt="S1")
FE=> Parse(stmt="foo", query="SELECT 1")
FE=> Bind(stmt="foo", portal="myportal")
FE=> Execute(portal="myportal")
FE=> Parse(stmt="S2", query="COMMIT")
FE=> Bind(stmt="S2", portal="")
FE=> Execute(portal="")
FE=> Close(stmt="S2")
FE=> Sync
<= BE ParseComplete
<= BE BindComplete
<= BE CommandComplete(BEGIN)
<= BE CloseComplete
<= BE ParseComplete
<= BE BindComplete
<= BE DataRow
<= BE CommandComplete(SELECT 1)
<= BE ParseComplete
<= BE BindComplete
<= BE CommandComplete(COMMIT)
<= BE CloseComplete
<= BE ReadyForQuery(I)
FE=> Terminate

Other example data files:

Copy 

#
# Test data example
#

# CopyIn
#
'Q'	"COPY t1 FROM STDIN"
# CopyData
'd'	"abc"
# CopyDone
'c'
'Y'

# CopyOut
#
'Q'	"COPY t1 TO STDOUT"
'Y'

#
# Copy fail case
#
'Q'	"COPY t1 FROM STDIN"
# CopyData
'd'	"abc"
# CopyFail
'f'	"pgproto copy fail test"
'Y'
'X'

Function Call 

#
# Test data example
#

# Function call (lo_creat)
# from PostgreSQL's src/include/catalog/pg_proc.data
# { oid => '957', descr => 'large object create',
#  proname => 'lo_creat', provolatile => 'v', proparallel => 'u',
#  prorettype => 'oid', proargtypes => 'int4', prosrc => 'be_lo_creat' },

'F'	957	1	0	1	1	"0"	0
'Y'
'X'

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