/      !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~<(c) 2010 Grant Monroe, (c) 2011 Leon P SmithBSD3leon@melding-monads.com experimentalNone <BMoLoFd is a Large Object (pseudo) File Descriptor. It is understood by libpq but not by operating system calls.notification channel name &process ID of notifying server process notification payload string eContains the information needed to cancel a command issued through a particular database connection.8An error occurred (e.g. the connection is not in the / state). Call b for more information.No more rows are availableIA complete row is not yet available. This case is only possible when & is has the async parameter set to .,Data representing a single row of the resultThe data was not sent because the attempt would block (this case is only possible if the connection is in nonblocking mode) Wait for write-ready (e.g. by using  on the c) and try again.An error occurred (use b to retrieve details).The data was sent.:The name of the source-code function reporting the error.JThe line number of the source-code location where the error was reported. HThe file name of the source-code location where the error was reported.!An indication of the context in which the error occurred. Presently this includes a call stack traceback of active procedural language functions and internally-generated queries. The trace is one entry per line, most recent first."{The text of a failed internally-generated command. This could be, for example, a SQL query issued by a PL/pgSQL function.#!This is defined the same as the $ field, but it is used when the cursor position refers to an internally generated command rather than the one submitted by the client. The "3 field will always appear when this field appears.$A string containing a decimal integer indicating an error cursor position as an index into the original statement string. The first character has index 1, and positions are measured in characters not bytes.%Hint: an optional suggestion what to do about the problem. This is intended to differ from detail in that it offers advice (potentially inappropriate) rather than hard facts. Might run to multiple lines.&rDetail: an optional secondary error message carrying more detail about the problem. Might run to multiple lines.'OThe primary human-readable error message (typically one line). Always present.(fThe SQLSTATE code for the error. The SQLSTATE code identifies the type of error that has occurred; it can be used by front-end applications to perform specific operations (such as error handling) in response to a particular database error. For a list of the possible SQLSTATE codes, see Appendix A. This field is not localizable, and is always present.)The severity; the field contents are ERROR, FATAL, or PANIC (in an error message), or WARNING, NOTICE, DEBUG, INFO, or LOG (in a notice message), or a localized translation of one of these. Always present.+A fatal error occurred.,1A nonfatal error (a notice or warning) occurred.-)The server's response was not understood..+Copy In (to server) data transfer started./.Copy Out (from server) data transfer started.0OSuccessful completion of a command returning data (such as a SELECT or SHOW).16Successful completion of a command returning no data.2(The string sent to the server was empty.88m encapsulates the result of a query (or more precisely, of a single SQL command --- a query string given to G can contain multiple commands and thus return multiple instances of 8.:the connection is bad;#idle, in a failed transaction block<"idle, in a valid transaction block=a command is in progress>currently idle@Negotiating SSL encryption.A3Negotiating environment-driven parameter settings.BBReceived authentication; waiting for backend start-up to finish.C'Waiting for a response from the server.DConnection OK; waiting to send.E"Waiting for connection to be made.F$The connection procedure has failed.GThe M is ready.MM* encapsulates a connection to the backend.N.Makes a new connection to the database server.This function opens a new database connection using the parameters taken from the string conninfo. Its nonblocking analogues are O and R.The passed string can be empty to use all default parameters, or it can contain one or more parameter settings separated by whitespace. Each parameter setting is in the form keyword = value. Spaces around the equal sign are optional. To write an empty value or a value containing spaces, surround it with single quotes, e.g., keyword = 'a value'. Single quotes and backslashes within the value must be escaped with a backslash, i.e., ' and \.OAMake a connection to the database server in a nonblocking manner.This covers the case when a connection is closed while other Haskell threads are using GHC's IO manager to wait on the descriptor. This is commonly the case with asynchronous notifications, for example. Since libpq is responsible for opening and closing the file descriptor, GHC's IO manager needs to be informed that the file descriptor has been closed. The IO manager will then raise an exception in those threads.Workaround for bug in g before base 4.6. Ensure the finalizer is only run once, to prevent a segfault. See GHC ticket #7170 Note that  and ? do not need this workaround, since their finalizers are just  calls.PNAllocate a Null Connection, which all libpq functions should safely fail on.Q,Test if a connection is the Null Connection.RIf Oe succeeds, the next stage is to poll libpq so that it can proceed with the connection sequence. Use c to obtain the B of the socket underlying the database connection. Loop thus: If R last returned Ku, wait until the socket is ready to read (as indicated by select(), poll(), or similar system function). Then call R again. Conversely, if R last returned J6, wait until the socket is ready to write, then call R! again. If you have yet to call R, i.e., just after the call to O!, behave as if it last returned J. Continue this loop until R returns L6, indicating the connection procedure has failed, or I8, indicating the connection has been successfully made.S/Resets the communication channel to the server.This function will close the connection to the server and attempt to reestablish a new connection to the same server, using all the same parameters previously used. This might be useful for error recovery if a working connection is lost.TGReset the communication channel to the server, in a nonblocking manner.U%To initiate a connection reset, call T. If it returns &, the reset has failed. If it returns , poll the reset using UC in exactly the same way as you would create the connection using R.V$Closes the connection to the server.Note that the M must not be used again after V has been called.W,Returns the database name of the connection.X(Returns the user name of the connection.Y'Returns the password of the connection.Z/Returns the server host name of the connection.[#Returns the port of the connection.\BReturns the command-line options passed in the connection request.GHelper function that checks for nullPtrs and returns the empty string.]%Returns the status of the connection.The status can be one of a number of values. However, only two of these are seen outside of an asynchronous connection procedure: G and F4. A good connection to the database has the status G5. A failed connection attempt is signaled by status F1. Ordinarily, an OK status will remain so until VG, but a communications failure might result in the status changing to FL prematurely. In that case the application could try to recover by calling S.See the entry for O and R8 with regards to other status codes that might be seen.^8Returns the current in-transaction status of the server.=R is reported only when a query has been sent to the server and not yet completed._3Looks up a current parameter setting of the server.{Certain parameter values are reported by the server automatically at connection startup or whenever their values change. _g can be used to interrogate these settings. It returns the current value of a parameter if known, or  if the parameter is not known.`6Interrogates the frontend/backend protocol being used.Applications might wish to use this to determine whether certain features are supported. Currently, the possible values are 2 (2.0 protocol), 3 (3.0 protocol), or zero (connection bad). This will not change after connection startup is complete, but it could theoretically change during a connection reset. The 3.0 protocol will normally be used when communicating with PostgreSQL 7.4 or later servers; pre-7.4 servers support only protocol 2.0. (Protocol 1.0 is obsolete and not supported by libpq.)a4Returns an integer representing the backend version.Applications might use this to determine the version of the database server they are connected to. The number is formed by converting the major, minor, and revision numbers into two-decimal-digit numbers and appending them together. For example, version 8.1.5 will be returned as 80105, and version 8.2 will be returned as 80200 (leading zeroes are not shown). Zero is returned if the connection is bad.bUReturns the error message most recently generated by an operation on the connection.2Nearly all libpq functions will set a message for b: if they fail. Note that by libpq convention, a nonempty b result can be multiple lines, and will include a trailing newline. The result string should not be expected to remain the same across operations on the M.cObtains the file descriptor number of the connection socket to the server. (This will not change during normal operation, but could change during connection setup or reset.)dReturns the process 9 of the backend server process handling this connection.The backend PID is useful for debugging purposes and for comparison to NOTIFY messages (which include the PID of the notifying backend process). Note that the PID belongs to a process executing on the database server host, not the local host!eReturns _ if the connection authentication method required a password, but none was available. Returns  if not.tThis function can be applied after a failed connection attempt to decide whether to prompt the user for a password.fReturns C if the connection authentication method used a password. Returns  if not.This function can be applied after either a failed or successful connection attempt to detect whether the server demanded a password.h9Submits a command to the server and waits for the result. Returns a 8 or possibly . A 8 will generally be returned except in out-of-memory conditions or serious errors such as inability to send the command to the server. If a + is returned, it should be treated like a + result. Use b+ to get more information about such errors.It is allowed to include multiple SQL commands (separated by semicolons) in the command string. Multiple queries sent in a single h call are processed in a single transaction, unless there are explicit BEGIN/COMMIT commands included in the query string to divide it into multiple transactions. Note however that the returned 8 structure describes only the result of the last command executed from the string. Should one of the commands fail, processing of the string stops with it and the returned 8 describes the error condition.iSubmits a command to the server and waits for the result, with the ability to pass parameters separately from the SQL command text.i is like h, but offers additional functionality: parameter values can be specified separately from the command string proper, and query results can be requested in either text or binary format. i` is supported only in protocol 3.0 and later connections; it will fail when using protocol 2.0.The primary advantage of i over h is that parameter values can be separated from the command string, thus avoiding the need for tedious and error-prone quoting and escaping.Unlike h, i allows at most one SQL command in the given string. (There can be semicolons in it, but not more than one nonempty command.) This is a limitation of the underlying protocol, but has some usefulness as an extra defense against SQL-injection attacks.Tip: Specifying parameter types via OIDs is tedious, particularly if you prefer not to hard-wire particular OID values into your program. However, you can avoid doing so even in cases where the server by itself cannot determine the type of the parameter, or chooses a different type than you want. In the SQL command text, attach an explicit cast to the parameter symbol to show what data type you will send. For example: SELECT * FROM mytable WHERE x = $1::bigint; This forces parameter $1 to be treated as bigint, whereas by default it would be assigned the same type as x. Forcing the parameter type decision, either this way or by specifying a numeric type OID, is strongly recommended when sending parameter values in binary format, because binary format has less redundancy than text format and so there is less chance that the server will detect a type mismatch mistake for you.jfSubmits a request to create a prepared statement with the given parameters, and waits for completion.j8 creates a prepared statement for later execution with k. This feature allows commands that will be used repeatedly to be parsed and planned just once, rather than each time they are executed. j` is supported only in protocol 3.0 and later connections; it will fail when using protocol 2.0.The function creates a prepared statement named stmtName from the query string, which must contain a single SQL command. stmtName can be "" to create an unnamed statement, in which case any pre-existing unnamed statement is automatically replaced; otherwise it is an error if the statement name is already defined in the current session. If any parameters are used, they are referred to in the query as $1, $2, etc. paramTypes specifies, by 3M, the data types to be assigned to the parameter symbols. If paramTypes is B, or any particular element in the array is zero, the server assigns a data type to the parameter symbol in the same way it would do for an untyped literal string. Also, the query can use parameter symbols with numbers higher than the length of paramTypes; data types will be inferred for these symbols as well. (See l9 for a means to find out what data types were inferred.)As with h, the result is normally a 8< whose contents indicate server-side success or failure. A O result indicates out-of-memory or inability to send the command at all. Use b+ to get more information about such errors.!Prepared statements for use with k@ can also be created by executing SQL PREPARE statements. (But j is more flexible since it does not require parameter types to be pre-specified.) Also, although there is no libpq function for deleting a prepared statement, the SQL DEALLOCATE statement can be used for that purpose.kaSends a request to execute a prepared statement with given parameters, and waits for the result.k is like iP, but the command to be executed is specified by naming a previously-prepared statement, instead of giving a query string. This feature allows commands that will be used repeatedly to be parsed and planned just once, rather than each time they are executed. The statement must have been prepared previously in the current session. ka is supported only in protocol 3.0 and later connections; it will fail when using protocol 2.0. The parameters are identical to i, except that the name of a prepared statement is given instead of a query string, and the paramTypes parameter is not present (it is not needed since the prepared statement's parameter types were determined when it was created).ljSubmits a request to obtain information about the specified prepared statement, and waits for completion.lU allows an application to obtain information about a previously prepared statement. la is supported only in protocol 3.0 and later connections; it will fail when using protocol 2.0.stmtName can be empty to reference the unnamed statement, otherwise it must be the name of an existing prepared statement. On success, a 8 with status 1 is returned. The functions  and  can be applied to this 8[ to obtain information about the parameters of the prepared statement, and the functions t, w, |N, etc provide information about the result columns (if any) of the statement.m^Submits a request to obtain information about the specified portal, and waits for completion.m allows an application to obtain information about a previously created portal. (libpq does not provide any direct access to portals, but you can use this function to inspect the properties of a cursor created with a DECLARE CURSOR SQL command.) m` is supported only in protocol 3.0 and later connections; it will fail when using protocol 2.0.}portalName can be empty to reference the unnamed portal, otherwise it must be the name of an existing portal. On success, a 8 with status 1 is returned. The functions t, w, |, etc can be applied to the 8H to obtain information about the result columns (if any) of the portal.n)Returns the result status of the command.o Converts the * returned by nS into a string describing the status code. The caller should not free the result.pUReturns the error message most recently generated by an operation on the connection.qFrees the memory associated with a result. Note that using this function correctly is especially tricky; you need to ensure that no references to the result. This means no references to a value returned by , no references hiding inside an unevaluated thunk, etc. Improper use of this function is likely to cause a segfault. Also, the use of this function is not strictly necessary; the memory will get freed by the garbage collector when there are no more references to the result.r/Returns an individual field of an error report.Gfieldcode is an error field identifier; see the symbols listed below.  is returned if the PGresult is not an error or warning result, or does not include the specified field. Field values will normally not include a trailing newline.The client is responsible for formatting displayed information to meet its needs; in particular it should break long lines as needed. Newline characters appearing in the error message fields should be treated as paragraph breaks, not line breaks.Errors generated internally by libpq will have severity and primary message, but typically no other fields. Errors returned by a pre-3.0-protocol server will include severity and primary message, and sometimes a detail message, but no other fields./Note that error fields are only available from 8 objects, not M* objects; there is no errorField function.sReturns the number of rows (tuples) in the query result. Because it returns an integer result, large result sets might overflow the return value on 32-bit operating systems.tHReturns the number of columns (fields) in each row of the query result.w2Returns the column name associated with the given $ number. Column numbers start at 0.x@Returns the column number associated with the given column name.yaReturns the OID of the table from which the given column was fetched. Column numbers start at 0.zReturns the column number (within its table) of the column making up the specified query result column. Query-result column numbers start at 0, but table columns have nonzero numbers.{ Returns the 51 of the given column. Column numbers start at 0.|DReturns the data type associated with the given column number. The 3M returned is the internal OID number of the type. Column numbers start at 0.You can query the system table pg_type to obtain the names and properties of the various data types. The OIDs of the built-in data types are defined in the file srcinclude&catalog/pg_type.h in the source tree.}lReturns the type modifier of the column associated with the given column number. Column numbers start at 0.The interpretation of modifier values is type-specific; they typically indicate precision or size limits. The value -1 is used to indicate "no information available". Most data types do not use modifiers, in which case the value is always -1.~lReturns the size in bytes of the column associated with the given column number. Column numbers start at 0.~ returns the space allocated for this column in a database row, in other words the size of the server's internal representation of the data type. (Accordingly, it is not really very useful to clients.) A negative value indicates the data type is variable-length.ZReturns a single field value of one row of a PGresult. Row and column numbers start at 0.#For convenience, this binding uses  and  to help construct the result. Note: The  ByteStringv returned holds a reference to the Result. As long as ByteString is live, the Result will not be garbage collected.  returns a copy of the data.dReturns a copy of a single field value of one row of a PGresult. Row and column numbers start at 0.#For convenience, this binding uses  and  to help construct the result.CTests a field for a null value. Row and column numbers start at 0.XReturns the actual length of a field value in bytes. Row and column numbers start at 0.mThis is the actual data length for the particular data value, that is, the size of the object pointed to by . For text data format this is the same as strlen(). For binary format this is essential information. Note that one should not rely on ~# to obtain the actual data length.9Returns the number of parameters of a prepared statement.This function is only useful when inspecting the result of PQdescribePrepared. For other types of queries it will return zero.ZReturns the data type of the indicated statement parameter. Parameter numbers start at 0.<This function is only useful when inspecting the result of l1. For other types of queries it will return zero.QReturns the command status tag from the SQL command that generated the PGresult.zCommonly this is just the name of the command, but it might include additional data such as the number of rows processed.7Returns the number of rows affected by the SQL command.oThis function returns a string containing the number of rows affected by the SQL statement that generated the 8. This function can only be used following the execution of a SELECT, CREATE TABLE AS, INSERT, UPDATE, DELETE, MOVE, FETCH, or COPY statement, or an EXECUTE of a prepared query that contains an INSERT, UPDATE, or DELETE statement. If the command that generated the 8 was anything else,  returns an empty string. Escapes a string for use within an SQL command. This is useful when inserting data values as literal constants in SQL commands. Certain characters (such as quotes and backslashes) must be escaped to prevent them from being interpreted specially by the SQL parser.PEscapes binary data for use within an SQL command with the type bytea. As with M, this is only used when inserting data directly into an SQL command string. Converts a  ByteStringB representation of binary data into binary data - the reverse of PQescapeByteaConnj. This is needed when retrieving bytea data in text format, but not when retrieving it in binary format.?The parameter points to a string such as might be returned by ! when applied to a bytea column. T converts this string representation into its binary representation. It returns a  ByteString, or  on error..This conversion is not exactly the inverse of J, because the string is not expected to be "escaped" when received from e. In particular this means there is no need for string quoting considerations, and so no need for a M parameter.escapeIdentifieri escapes a string for use as an SQL identifier, such as a table, column, or function name. This is useful when a user-supplied identifier might contain special characters that would otherwise not be interpreted as part of the identifier by the SQL parser, or when the identifier might contain upper case characters whose case should be preserved.The return string has all special characters replaced so that it will be properly processed as an SQL identifier. The return string will also be surrounded by double quotes. On error, escapeIdentifier returns 8 and a suitable message is stored in the conn object. Send raw COPY data to the server during the . state.5Send end-of-data indication to the server during the . state.putCopyEnd conn Nothing ends the . operation successfully.putCopyEnd conn (Just errormsg) forces the COPY to fail, with errormsg used as the error message.After  returns CopyOk, call + to obtain the final result status of the COPY+ command. Then return to normal operation. Receive raw COPY! data from the server during the /i state. The boolean parameter determines whether or not the call will block while waiting for data.DSubmits a command to the server without waiting for the result(s). = is returned if the command was successfully dispatched and  if not (in which case, use b- to get more information about the failure).[Submits a command and separate parameters to the server without waiting for the result(s).jSends a request to create a prepared statement with the given parameters, without waiting for completion.jSends a request to execute a prepared statement with given parameters, without waiting for the result(s).pSubmits a request to obtain information about the specified prepared statement, without waiting for completion.#This is an asynchronous version of l: it returns - if it was able to dispatch the request, and ( if not. After a successful call, call O to obtain the results. The function's parameters are handled identically to l. Like l0, it will not work on 2.0-protocol connections.dSubmits a request to obtain information about the specified portal, without waiting for completion.#This is an asynchronous version of m: it returns - if it was able to dispatch the request, and ( if not. After a successful call, call O to obtain the results. The function's parameters are handled identically to m. Like m0, it will not work on 2.0-protocol connections.'Waits for the next result from a prior , , , or s call, and returns it. A null pointer is returned when the command is complete and there will be no more results.2If input is available from the server, consume it. normally returns % indicating "no error", but returns 3 if there was some kind of trouble (in which case bu can be consulted). Note that the result does not say whether any input data was actually collected. After calling , the application can check  and/or # to see if their state has changed.Returns True if a command is busy, that is, getResult would block waiting for input. A False return indicates that getResult can be called with assurance of not blocking.B will not itself attempt to read data from the server; therefore : must be invoked first, or the busy state will never end..Sets the nonblocking status of the connection.7Returns the blocking status of the database connection.AAttempts to flush any queued output data to the server. Returns 1 if successful (or if the send queue is empty), " if it failed for some reason, or  { if it was unable to send all the data in the send queue yet (this case can only occur if the connection is nonblocking).Creates a data structure containing the information needed to cancel a command issued through a particular database connection. creates a   object given a M. It will return , if the given conn is an invalid connection.DRequests that the server abandon processing of the current command.The return value is 'Right ()' if the cancel request was successfully dispatched and if not, 'Left B.ByteString' containing an error message explaining why not.ISuccessful dispatch is no guarantee that the request will have any effect, however. If the cancellation is effective, the current command will terminate early and return an error result. If the cancellation fails (say, because the server was already done processing the command), then there will be no visible result at all.vReturns the next notification from a list of unhandled notification messages received from the server. It returns a  if there are no pending notifications. Once a notification is returned from notifies, it is considered handled and will be removed from the list of notifications.Returns the client encoding.Sets the client encoding.1Determines the verbosity of messages returned by b and p.K sets the verbosity mode, returning the connection's previous setting. In  mode, returned messages include severity, primary text, and position only; this will normally fit on a single line. The default mode produces messages that include the above plus any detail, hint, or context fields (these might span multiple lines). The { mode includes all available fields. Changing the verbosity does not affect the messages available from already-existing 8* objects, only subsequently-created ones.uReturns a ByteString with a finalizer that touches the ForeignPtr PGresult that "owns" the CString to keep it alive.IThe CString must be a null terminated c string. nullPtrs are treated as .lReturns a ByteString with a finalizer that touches the ForeignPtr that "owns" the CString to keep it alive.IThe CString must be a null terminated c string. nullPtrs are treated as .PCreates a new large object, returns the Object ID of the newly created object.BCreates a new large object with a particular Object ID. Returns ` if the requested Object ID is already in use by some other large object or other failure. If g is used as a parameter, then  will assign an unused 3.Imports an operating system file as a large object. Note that the file is read by the client interface library, not by the server; so it must exist in the client file system and be readable by the client application.hImports an operating system file as a large object with the given Object ID. Combines the behavior of  and Exports a large object into a operating system file. Note that the file is written by the client interface library, not the server. Returns 'Just ()' on success,  on failure.Opens an existing large object for reading or writing. The Oid specifies the large object to open. A large object cannot be opened before it is created. A large object descriptor is returned for later use in , , , , and ]. The descriptor is only valid for the duration of the current transation. On failure,  is returned.2The server currently does not distinguish between  and Z; write-only modes are not enforced. However there is a significant difference between  and the other modes: with  you cannot write on the descriptor, and the data read from it will reflect the contents of the large object at the time of the transaction snapshot that was active when q was executed, regardless of later writes by this or other transactions. Reading from a descriptor opened in , , or  returns data that reflects all writes of other committed transactions as well as the writes of the current transaction. This is similar to the behavior of REPEATABLE READ versus READ COMMITTED% transaction modes for ordinary SQL SELECT commands.loWrite conn fd buf writes the bytestring buf! to the large object descriptor fdP. The number of bytes actually written is returned. In the event of an error,  is returned.loRead conn fd len reads up to len) bytes from the large object descriptor fd. In the event of an error,  is returned.Changes the current read or write location associated with a large object descriptor. The return value is the new location pointer, or  on error.HObtains the current read or write location of a large object descriptor.Truncates a large object to a given length. If the length is greater than the current large object, then the large object is extended with null bytes. ('\x00')The file offest is not changed.p is new as of PostgreSQL 8.3; if this function is run against an older server version, it will fail and return Closes a large object descriptor. Any large object descriptors that remain open at the end of a transaction will be closed automatically.)Removes a large object from the database.(  !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLM      !NConnection InfoOConnection InfoPQRSTU"VWXYZ[\]^_ paramName`abcdefgh connection statementresulti connection statement parameters result formatresultj connectionstmtNamequery paramTypesresultk connectionstmtName parameters result formatresultlstmtNamem portalNamenopqrstuvwxyz{|}~ param_number#$stmtName portalName%&'()*+,-./012  !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~MNORPQSTUHLKJIVWXYZ[\?GFEDCBA@]9>=<;:^_`abcdef8h57634gijklm*210/.-,+nop)('&%$#"! rqstvuwxyz{|}~       )('&%$#"! *210/.-,+3457689>=<;:?GFEDCBA@HLKJIM      !NOPQRSTU"VWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~#$%&'()*+,-./0123       !"#$%&'()*+,-./01234456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~ 8      !"#$%&'()*+,-./0123456789postgresql-libpq-0.9.0.2Database.PostgreSQL.LibPQControl.ConcurrentthreadWaitWriteLoFd Verbosity ErrorsVerbose ErrorsDefault ErrorsTerseNotify notifyRelname notifyBePid notifyExtraCancel FlushStatus FlushWriting FlushFailedFlushOk CopyOutResult CopyOutError CopyOutDoneCopyOutWouldBlock CopyOutRow CopyInResultCopyInWouldBlock CopyInErrorCopyInOkRowColumnCol FieldCodeDiagSourceFunctionDiagSourceLineDiagSourceFile DiagContextDiagInternalQueryDiagInternalPositionDiagStatementPositionDiagMessageHintDiagMessageDetailDiagMessagePrimary DiagSqlstate DiagSeverity ExecStatus FatalError NonfatalError BadResponseCopyInCopyOutTuplesOk CommandOk EmptyQueryOidFormatBinaryTextResultTransactionStatus TransUnknown TransInError TransInTrans TransActive TransIdle ConnStatusConnectionSSLStartupConnectionSetEnvConnectionAuthOkConnectionAwaitingResponseConnectionMadeConnectionStarted ConnectionBad ConnectionOk PollingStatus PollingOkPollingWritingPollingReading PollingFailed Connection connectdb connectStartnewNullConnectionisNullConnection connectPollreset resetStart resetPollfinishdbuserpasshostportoptionsstatustransactionStatusparameterStatusprotocolVersion serverVersion errorMessagesocket backendPIDconnectionNeedsPasswordconnectionUsedPassword invalidOidexec execParamsprepare execPrepareddescribePrepareddescribePortal resultStatus resStatusresultErrorMessageunsafeFreeResultresultErrorFieldntuplesnfieldstoColumntoRowfnamefnumberftable ftablecolfformatftypefmodfsizegetvalue getvalue' getisnull getlengthnparams paramtype cmdStatus cmdTuplesescapeStringConnescapeByteaConn unescapeByteaescapeIdentifier putCopyData putCopyEnd getCopyData sendQuerysendQueryParams sendPreparesendQueryPreparedsendDescribePreparedsendDescribePortal getResult consumeInputisBusysetnonblocking isnonblockingflush getCancelcancelnotifiesclientEncodingsetClientEncodingsetErrorVerbosityloCreatloCreateloImportloImportWithOidloExportloOpenloWriteloReadloSeekloTell loTruncateloCloseloUnlinkghc-prim GHC.TypesTruepqfinishnewForeignPtrOncebaseForeign.Concurrent newForeignPtrmaybeBsFromForeignPtrGHC.ForeignPtrtouchForeignPtrSystem.Posix.TypesFdFalse statusString Data.MaybeNothingCPidmaybeBsFromResult GHC.IO.IOMode WriteMode ReadWriteModeReadMode AppendModeCFd PGVerbosityPGcancelPGresultPGconnConn c_lo_unlink c_lo_close c_lo_truncate c_lo_tell c_lo_lseek c_lo_read c_lo_write c_lo_open c_lo_exportc_lo_import_with_oid c_lo_import c_lo_create c_lo_creat c_PQfreemem p_PQfreememc_PQescapeIdentifierc_PQunescapeByteac_PQescapeByteaConnc_PQescapeStringConn c_PQcmdTuples c_PQcmdStatus c_PQparamtype c_PQnparams c_PQgetlength c_PQgetisnull c_PQgetvalue c_PQfsizec_PQfmod c_PQftype c_PQfformat c_PQftablecol c_PQftable c_PQfnumber c_PQfname c_PQnfields c_PQntuplesc_PQresultErrorFieldc_PQresultErrorMessage c_PQresStatusc_PQresultStatus p_PQclearc_PQdescribePortalc_PQdescribePreparedc_PQexecPrepared c_PQpreparec_PQexecParamsc_PQexec c_PQgetResultc_PQisnonblockingc_PQsetnonblocking c_PQisBusyc_PQconsumeInput c_PQnotifies c_PQcancelp_PQfreeCancel c_PQgetCancel c_PQflushc_PQsendDescribePortalc_PQsendDescribePreparedc_PQsendQueryPreparedc_PQsendPreparec_PQsendQueryParams c_PQsendQueryc_PQgetCopyDatac_PQputCopyEndc_PQputCopyDatac_PQsetErrorVerbosityc_PQsetClientEncodingc_pg_encoding_to_charc_PQclientEncoding c_PQresetPollc_PQresetStart c_PQreset c_PQfinishc_PQerrorMessage c_PQsocketc_PQserverVersionc_PQprotocolVersionc_PQparameterStatusc_PQtransactionStatus c_PQstatusc_PQconnectionUsedPasswordc_PQconnectionNeedsPasswordc_PQbackendPID c_PQoptionsc_PQportc_PQhostc_PQpassc_PQuserc_PQdbc_PQconnectPollc_PQconnectStart c_PQconnectdb pollHelpertoCopyInResultputCopyCStringwithConn enumFromConnresultFromConn withResult numFromResultenumFromResultloMode toMaybeOid nonnegIntnegError$fEnumVerbosity$fStorableNotify$fEnumFieldCode$fEnumExecStatus