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- builtins.object
-
- sqlrconnection
- sqlrcursor
class sqlrconnection(builtins.object) |
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sqlrconnection(host, port, socket, user, password, retrytime=0, tries=1)
A wrapper for the sqlrelay connection API. Closely follows the C++ API.
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Methods defined here:
- __del__(self)
- __init__(self, host, port, socket, user, password, retrytime=0, tries=1)
- Initiates a connection to "server" on "port" or to the unix "socket" on
the local machine and auths with "user" and "password". Failed
connections will be retried for "tries" times, waiting "retrytime"
seconds between each try. If "tries" is 0 then retries will continue
forever. If "retrytime" is 0 then retries will be attempted on a
default interval.
If "server" is a comma-separated list of hosts, then an attempt will be
made to connect to each until the attempt succeeds, or there are no
more hosts left to try.
If the "socket" parameter is neither NULL nor "" then an
attempt will be made to connect through it before
attempting to connect to "server" on "port". If it is NULL
or "" then no attempt will be made to connect through the
socket.
- autoCommitOff(self)
- Instructs the database to wait for the
client to tell it when to commit.
- autoCommitOn(self)
- Instructs the database to perform a commit
after every successful query.
- begin(self)
- Begins a transaction. Returns true if the begin
succeeded, false if it failed. If the database
automatically begins a new transaction when a
commit or rollback is issued then this doesn't
do anything unless SQL Relay is faking transaction
blocks.
- bindFormat(self)
- Returns a string representing the bind variable format used
by the database. For example:
? - database uses a ? to represent a bind variable
@* - database uses a @ followed by any characters to
represent a bind variable
$1 - database uses a $ followed by a number to represent a
bind variable
:* - database uses a : followed by any characters to
represent a bind variable
- clientVersion(self)
- Returns the version of the SQL Relay client version
- commit(self)
- Issues a commit, returns true if the commit
succeeded, false if it failed.
- dbHostName(self)
- Returns the host name of the database
- dbIpAddress(self)
- Returns the ip address of the database
- dbVersion(self)
- Returns the version of the database
- debugOff(self)
- Turn verbose debugging off.
- debugOn(self)
- Turn verbose debugging on.
Another way to do this is to start a query with "-- debug
".
Yet another way is to set the environment variable SQLR_CLIENT_DEBUG
to "ON"
- disableEncryption(self)
- Disables encryption.
- enableKerberos(self, service, mech, flags)
- Enables Kerberos authentication and encryption.
"service" indicates the Kerberos service name of the
SQL Relay server. If left empty or NULL then the service
name "sqlrelay" will be used. "sqlrelay" is the default
service name of the SQL Relay server. Note that on Windows
platforms the service name must be fully qualified,
including the host and realm name. For example:
"sqlrelay/sqlrserver.firstworks.com@AD.FIRSTWORKS.COM".
"mech" indicates the specific Kerberos mechanism to use.
On Linux/Unix platforms, this should be a string
representation of the mechnaism's OID, such as:
{ 1 2 840 113554 1 2 2 }
On Windows platforms, this should be a string like:
Kerberos
If left empty or NULL then the default mechanism will be
used. Only set this if you know that you have a good
reason to.
"flags" indicates what Kerberos flags to use. Multiple
flags may be specified, separated by commas. If left
empty or NULL then a defalt set of flags will be used.
Only set this if you know that you have a good reason to.
Valid flags include:
* GSS_C_MUTUAL_FLAG
* GSS_C_REPLAY_FLAG
* GSS_C_SEQUENCE_FLAG
* GSS_C_CONF_FLAG
* GSS_C_INTEG_FLAG
For a full list of flags, consult the GSSAPI documentation,
though note that only the flags listed above are supported
on Windows.
- enableTls(self, version, cert, password, ciphers, validate, ca, depth)
- Enables TLS/SSL encryption, and optionally authentication.
"version" specifies the TLS/SSL protocol version that the
client will attempt to use. Valid values include SSL2,
SSL3, TLS1, TLS1.1, TLS1.2 or any more recent version of
TLS, as supported by and enabled in the underlying TLS/SSL
library. If left blank or empty then the highest supported
version will be negotiated.
"cert" is the file name of the certificate chain file to
send to the SQL Relay server. This is only necessary if
the SQL Relay server is configured to authenticate and
authorize clients by certificate.
If "cert" contains a password-protected private key, then
"password" may be supplied to access it. If the private
key is not password-protected, then this argument is
ignored, and may be left empty or NULL.
"ciphers" is a list of ciphers to allow. Ciphers may be
separated by spaces, commas, or colons. If "ciphers" is
empty or NULL then a default set is used. Only set this if
you know that you have a good reason to.
For a list of valid ciphers on Linux/Unix platforms, see:
man ciphers
For a list of valid ciphers on Windows platforms, see:
https://msdn.microsoft.com/en-us/library/windows/desktop/aa375549%28v=vs.85%29.aspx
On Windows platforms, the ciphers (alg_id's) should omit
CALG_ and may be given with underscores or dashes.
For example: 3DES_112
"validate" indicates whether to validate the SQL Relay's
server certificate, and may be set to one of the following:
"no" - Don't validate the server's certificate.
"ca" - Validate that the server's certificate was
signed by a trusted certificate authority.
"ca+host" - Perform "ca" validation and also validate
that one of the subject altenate names (or the
common name if no SANs are present) in the
certificate matches the host parameter.
(Falls back to "ca" validation when a unix
socket is used.)
"ca+domain" - Perform "ca" validation and also validate
that the domain name of one of the subject
alternate names (or the common name if no SANs
are present) in the certificate matches the
domain name of the host parameter. (Falls back
to "ca" validation when a unix socket is used.)
"ca" is the location of a certificate authority file to
use, in addition to the system's root certificates, when
validating the SQL Relay server's certificate. This is
useful if the SQL Relay server's certificate is self-signed.
On Windows, "ca" must be a file name.
On non-Windows systems, "ca" can be either a file or
directory name. If it is a directory name, then all
certificate authority files found in that directory will be
used. If it a file name, then only that file will be used.
Note that the supported "cert" and "ca" file formats may
vary between platforms. A variety of file formats are
generally supported on Linux/Unix platfoms (.pem, .pfx,
etc.) but only the .pfx format is currently supported on
Windows. */
- endSession(self)
- Ends the current session.
- errorMessage(self)
- If the operation failed, the error message will be returned
from this method. Otherwise, it returns None.
- errorNumber(self)
- If an operation failed and generated an
error, the error number is available here.
If there is no error then this method
returns 0.
- getBindVariableDelimiterAtSignSupported(self)
- Returns true if at-signs (@) are considered to be
valid bind variable delimiters.
- getBindVariableDelimiterColonSupported(self)
- Returns true if colons (:) are considered to be
valid bind variable delimiters.
- getBindVariableDelimiterDollarSignSupported(self)
- Returns true if dollar signs ($) are considered to be
valid bind variable delimiters.
- getBindVariableDelimiterQuestionMarkSupported(self)
- Returns true if question marks (?) are considered to be
valid bind variable delimiters.
- getClientInfo(self)
- Returns the string that was set by setClientInfo().
- getConnectionPort(self)
- Returns the inet port that the connection is
communicating over. This parameter may be
passed to another connection for use in
the resumeSession() method.
Note: the value returned by this method is
only valid after a call to suspendSession().
- getConnectionSocket(self)
- Returns the unix socket that the connection is
communicating over. This parameter may be
passed to another connection for use in
the resumeSession() method.
Note: the value returned by this method is
only valid after a call to suspendSession().
- getCurrentDatabase(self)
- Returns the database/schema that is currently in use.
- getDebug(self)
- Returns 1 if debugging is turned on and 0 if debugging is turned off.
- getLastInsertId(self)
- Returns the value of the autoincrement column for the last insert
- identify(self)
- Returns the type of database:
oracle, postgresql, mysql, etc.
- nextvalFormat(self)
- Returns a string representing the format of the sequence
nextval command used in the database. The format will
contain a %s in place of the sequence name. For example:
(nextval for %s)
next value for %s
nextval('%s')
%s.nextval
Returns an empty string if the database does not support
sequences.
- ping(self)
- Returns 1 if the database is up and 0
if it's down.
- resumeSession(self, port, socket)
- Resumes a session previously left open
using suspendSession().
Returns 1 on success and 0 on failure.
- rollback(self)
- Issues a rollback, returns true if the rollback
succeeded, false if it failed.
- selectDatabase(self, database)
- Sets the current database/schema to "database"
- serverVersion(self)
- Returns the version of the SQL Relay server version
- setBindVariableDelimiters(self, delimiters)
- Sets which delimiters are used to identify bind variables
in countBindVariables() and validateBinds(). Valid
delimiters include ?,:,@, and $. Defaults to "?:@$"
- setClientInfo(self, clientinfo)
- Allows you to set a string that will be passed to the
server and ultimately included in server-side logging
along with queries that were run by this instance of
the client.
- setConnectTimeout(self, timeoutsec, timeoutusec)
- Sets the server connect timeout in seconds and
milliseconds. Setting either parameter to -1 disables the
timeout. You can also set this timeout using the
SQLR_CLIENT_CONNECT_TIMEOUT environment variable.
- setDebugFile(self, filename)
- Allows you to specify a file to write debug to.
Setting "filename" to NULL or an empty string causes debug
to be written to standard output (the default).
- setResponseTimeout(self, timeoutsec, timeoutusec)
- Sets the response timeout (for queries, commits, rollbacks,
pings, etc.) in seconds and milliseconds. Setting either
parameter to -1 disables the timeout. You can also set
this timeout using the SQLR_CLIENT_RESPONSE_TIMEOUT
environment variable.
- suspendSession(self)
- Disconnects this connection from the current
session but leaves the session open so
that another connection can connect to it
using resumeSession().
Data descriptors defined here:
- __dict__
- dictionary for instance variables
- __weakref__
- list of weak references to the object
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class sqlrcursor(builtins.object) |
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sqlrcursor(sqlrcon)
A wrapper for the sqlrelay cursor API. Closely follows the C++ API.
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Methods defined here:
- __del__(self)
- __init__(self, sqlrcon)
- Initialize self. See help(type(self)) for accurate signature.
- affectedRows(self)
- Returns the number of rows that were
updated, inserted or deleted by the query.
Not all databases support this call. Don't
use it for applications which are designed
to be portable across databases. -1 is
returned by databases which don't support
this option.
- cacheOff(self)
- Sets query caching off.
- cacheToFile(self, filename)
- Sets query caching on. Future queries
will be cached to the file "filename".
The full pathname of the file can be
retrieved using getCacheFileName().
A default time-to-live of 10 minutes is
also set.
Note that once cacheToFile() is called,
the result sets of all future queries will
be cached to that file until another call
to cacheToFile() changes which file to
cache to or a call to cacheOff() turns off
caching.
- clearBinds(self)
- Clear all binds variables.
- closeResultSet()
- Closes the current result set, if one is open. Data
that has been fetched already is still available but
no more data may be fetched. Server side resources
for the result set are freed as well.
- colCount(self)
- Returns the number of columns in the current result set.
- countBindVariables(self)
- Parses the previously prepared query,
counts the number of bind variables defined
in it and returns that number.
- defineOutputBindBlob(self, variable)
- Define an output bind varaible.
- defineOutputBindClob(self, variable)
- Define an output bind varaible.
- defineOutputBindCursor(self, variable)
- Define an output bind varaible.
- defineOutputBindDouble(self, variable)
- Define a double precision floating point output bind varaible.
- defineOutputBindInteger(self, variable)
- Define an integer output bind varaible.
- defineOutputBindString(self, variable, length)
- Define a string output bind varaible.
- dontGetColumnInfo(self)
- Tells the server not to send any column
info (names, types, sizes). If you don't
need that info, you should call this
method to improve performance.
- endOfResultSet(self)
- Returns 0 if part of the result set is still
pending on the server and 1 if not. This
method can only return 0 if
setResultSetBufferSize() has been called
with a parameter other than 0.
- errorMessage(self)
- If the query failed, the error message will be returned
from this method. Otherwise, it returns None.
- errorNumber(self)
- If the query failed and generated an
error, the error number is available here.
If there is no error then this method
returns 0.
- executeQuery(self)
- Execute the query that was previously
prepared and bound.
- fetchFromBindCursor(self)
- Fetch from a cursor that was returned as
an output bind variable.
- firstRowIndex(self)
- Returns the index of the first buffered row.
This is useful when buffering only part of
the result set at a time.
- getCacheFileName(self)
- Returns the name of the file containing the most
recently cached result set.
- getColumnInfo(self)
- Tells the server to send column info.
- getColumnIsAutoIncrement(self, col)
- Returns 1 if the specified column auto-increments and
0 otherwise.
- getColumnIsBinary(self, col)
- Returns 1 if the specified column contains binary data
and 0 otherwise.
- getColumnIsNullable(self, col)
- Returns 1 if the specified column can contain nulls and
0 otherwise.
- getColumnIsPartOfKey(self, col)
- Returns 1 if the specified column is part of a composite
key and 0 otherwise.
- getColumnIsPrimaryKey(self, col)
- Returns 1 if the specified column is a primary key and
0 otherwise.
- getColumnIsUnique(self, col)
- Returns 1 if the specified column is unique and
0 otherwise.
- getColumnIsUnsigned(self, col)
- Returns 1 if the specified column is an unsigned number
and 0 otherwise.
- getColumnIsZeroFilled(self, col)
- Returns 1 if the specified column was created with the
zero-fill flag and 0 otherwise.
- getColumnLength(self, col)
- Returns the length of the specified column. col may
be a name or number.
- getColumnList(sefl, table, wild)
- Sends a query that returns a list of columns
in the table specified by the "table" parameter
matching "wild". If wild is empty or NULL then
a list of all columns will be returned.
- getColumnName(self, col)
- Returns the name of column number col.
- getColumnNames(self)
- Returns a list of column names in the current result set.
- getColumnPrecision(self, col)
- Returns the precision of the specified column.
Precision is the total number of digits in a number.
eg: 123.45 has a precision of 5. For non-numeric
types, it's the number of characters in the string.
- getColumnScale(self, col)
- Returns the scale of the specified column. Scale is
the total number of digits to the right of the decimal
point in a number. eg: 123.45 has a scale of 2.
- getColumnType(self, col)
- Returns the type of the specified column. col may
be a name or number.
- getDatabaseList(self, wild)
- Sends a query that returns a list of
databases/schemas matching "wild". If wild is empty
or NULL then a list of all databases/schemas will be
returned.
- getField(self, row, col)
- Returns the value of the specified row and
column. col may be a column name or number.
- getFieldAsDouble(self, row, col)
- Returns the specified field as a double precision
floating point number.
- getFieldAsInteger(self, row, col)
- Returns the specified field as a long integer.
- getFieldLength(self, row, col)
- Returns the length of the specified row and
column. col may be a column name or number.
- getLongest(self, col)
- Returns the length of the specified column. col may
be a name or number.
- getNullsAsEmptyStrings(self)
- Tells the cursor to return NULL fields and output
bind variables as empty strings.
This is the default.
- getNullsAsNone(self)
- Tells the cursor to return NULL fields and output
bind variables as NULL's.
- getOutputBindBlob(self, variable)
- Get the value stored in a previously
defined output bind variable.
- getOutputBindClob(self, variable)
- Get the value stored in a previously
defined output bind variable.
- getOutputBindCursor(self, variable)
- Get the cursor associated with a previously
defined output bind variable.
- getOutputBindDouble(self, variable)
- Get the value stored in a previously
defined output bind variable as a double
precision floating point number.
- getOutputBindInteger(self, variable)
- Get the value stored in a previously
defined output bind variable as a long
integer.
- getOutputBindLength(self, variable)
- Retrieve the length of an output bind variable.
- getOutputBindString(self, variable)
- Get the value stored in a previously
defined output bind variable.
- getResultSetBufferSize(self)
- Returns the number of result set rows that
will be buffered at a time or 0 for the
entire result set.
- getResultSetId(self)
- Returns the internal ID of this result set.
This parameter may be passed to another
cursor for use in the resumeResultSet()
method.
Note: the value returned by this method is
only valid after a call to suspendResultSet().
- getRow(self, row)
- Returns a list of values in the given row.
- getRowDictionary(self, row)
- Returns the requested row as values in a dictionary
with column names for keys.
- getRowLengths(self, row)
- Returns a list of lengths in the given row.
- getRowLengthsDictionary(self, row)
- Returns the requested row lengths as values in a dictionary
with column names for keys.
- getRowLengthsRange(self, beg, end)
- Returns a list of lists of the lengths of rows between beg and end.
Note: this function has no equivalent in other SQL Relay API's.
- getRowRange(self, beg, end)
- Returns a list of lists of the rows between beg and end.
Note: this function has no equivalent in other SQL Relay API's.
- getTableList(self, wild)
- Sends a query that returns a list of tables
matching "wild". If wild is empty or NULL then
a list of all tables will be returned.
- inputBind(self, variable, value, precision=0, scale=0)
- Define an input bind varaible.
Returns true if the variable was successfully bound or false if the
variable isn't a string, integer or decimal. If the value is a decimal
then precision and scale may also be specified. If you don't have the
precision and scale then set them both to 0. However in that case you
may get unexpected rounding behavior if the server is faking binds.
- inputBindBlob(self, variable, value, length)
- Define an input bind varaible.
- inputBindClob(self, variable, value, length)
- Define an input bind varaible.
- inputBinds(self, variables, values, precisions=None, scales=None)
- Define input bind variables.
Returns true if the variables were successfully bound or false if one
of the variables wasn't a string, integer or floating point number,
or if precision and scale weren't provided for a floating point number.
- lowerCaseColumnNames(self)
- Columns names are converted to lower case.
- mixedCaseColumnNames(self)
- Columns names are returned in the same
case as they are defined in the database.
This is the default.
- openCachedResultSet(self, filename)
- Open a result set after a sendCachedQeury
- prepareFileQuery(self, path, file)
- Prepare to execute the contents of path/filename.
- prepareQuery(self, query)
- Prepare to execute query.
- prepareQueryWithLength(self, query, length)
- Prepare to execute "query" with length
"length". This method must be used if the
query contains binary data.
- resumeCachedResultSet(self, id, filename)
- Resumes a result set previously left open
using suspendSession() and continues caching
the result set to "filename".
Returns 1 on success and 0 on failure.
- resumeResultSet(self, id)
- Resumes a result set previously left open
using suspendSession().
Returns 1 on success and 0 on failure.
- rowCount(self)
- Returns the number of rows in the current result set.
- sendFileQuery(self, path, file)
- Send the SQL query in path/file to the server and
gets a result set.
- sendQuery(self, query)
- Send a SQL query to the server and
gets a result set.
- sendQueryWithLength(self, query, length)
- Sends "query" with length "length" and gets
a result set. This method must be used if
the query contains binary data.
- setCacheTtl(self, ttl)
- Sets the time-to-live for cached result
sets. The sqlr-cachemanger will remove each
cached result set "ttl" seconds after it's
created.
- setResultSetBufferSize(self, rows)
- Sets the number of rows of the result set
to buffer at a time. 0 (the default)
means buffer the entire result set.
- substitution(self, variable, value, precision=0, scale=0)
- Define a substitution variable.
Returns true if the variable was successfully substituted or false if
the variable isn't a string, integer or floating point number, or if
precision and scale aren't provided for a floating point number.
- substitutions(self, variables, values, precisions=None, scales=None)
- Define substitution variables.
Returns true if the variables were successfully substituted or false if
one of the variables wasn't a string, integer or floating point number,
or if precision and scale weren't provided for a floating point number.
- suspendResultSet(self)
- Tells the server to leave this result
set open when the cursor calls
suspendSession() so that another cursor can
connect to it using resumeResultSet() after
it calls resumeSession().
- totalRows(self)
- Returns the total number of rows that will
be returned in the result set. Not all
databases support this call. Don't use it
for applications which are designed to be
portable across databases. -1 is returned
by databases which don't support this option.
- upperCaseColumnNames(self)
- Columns names are converted to upper case.
- validBind(self, variable)
- Returns true if "variable" was a valid
input bind variable of the query.
- validateBinds(self)
- If you are binding to any variables that
might not actually be in your query, call
this to ensure that the database won't try
to bind them unless they really are in the
query.
Data descriptors defined here:
- __dict__
- dictionary for instance variables
- __weakref__
- list of weak references to the object
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