mirror of https://github.com/citusdata/citus.git
62 lines
2.4 KiB
C
62 lines
2.4 KiB
C
/*-------------------------------------------------------------------------
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*
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* remote_commands.h
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* Helpers to execute commands on remote nodes, over libpq.
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*
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* Copyright (c) 2016, Citus Data, Inc.
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef REMOTE_COMMAND_H
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#define REMOTE_COMMAND_H
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#include "distributed/connection_management.h"
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/* errors which ExecuteRemoteCommand might return */
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#define QUERY_SEND_FAILED 1
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#define RESPONSE_NOT_OKAY 2
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struct pg_result; /* target of the PGresult typedef */
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/* GUC, determining whether statements sent to remote nodes are logged */
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extern bool LogRemoteCommands;
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/* simple helpers */
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extern bool IsResponseOK(struct pg_result *result);
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extern void ForgetResults(MultiConnection *connection);
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extern bool ClearResults(MultiConnection *connection, bool raiseErrors);
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extern bool ClearResultsIfReady(MultiConnection *connection);
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extern bool SqlStateMatchesCategory(char *sqlStateString, int category);
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/* report errors & warnings */
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extern void ReportConnectionError(MultiConnection *connection, int elevel);
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extern void ReportResultError(MultiConnection *connection, struct pg_result *result,
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int elevel);
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extern char * pchomp(const char *in);
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extern void LogRemoteCommand(MultiConnection *connection, const char *command);
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/* wrappers around libpq functions, with command logging support */
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extern void ExecuteCriticalRemoteCommand(MultiConnection *connection,
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const char *command);
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extern int ExecuteOptionalRemoteCommand(MultiConnection *connection,
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const char *command,
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struct pg_result **result);
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extern int SendRemoteCommand(MultiConnection *connection, const char *command);
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extern int SendRemoteCommandParams(MultiConnection *connection, const char *command,
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int parameterCount, const Oid *parameterTypes,
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const char *const *parameterValues);
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extern List * ReadFirstColumnAsText(struct pg_result *queryResult);
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extern struct pg_result * GetRemoteCommandResult(MultiConnection *connection,
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bool raiseInterrupts);
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extern bool PutRemoteCopyData(MultiConnection *connection, const char *buffer,
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int nbytes);
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extern bool PutRemoteCopyEnd(MultiConnection *connection, const char *errormsg);
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/* waiting for multiple command results */
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extern void WaitForAllConnections(List *connectionList, bool raiseInterrupts);
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#endif /* REMOTE_COMMAND_H */
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