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Allow queries submitted by postgres_fdw to be canceled.

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This fixes a problem which is not new, but with the advent of direct
foreign table modification in 0bf3ae88af,
it's somewhat more likely to be annoying than previously.  So,
arrange for a local query cancelation to propagate to the remote side.

Michael Paquier, reviewed by Etsuro Fujita.	 Original report by
Thom Brown.
This commit is contained in:
Robert Haas
2016-04-21 10:46:09 -04:00
parent 11e178d0dc
commit f039eaac71
3 changed files with 180 additions and 44 deletions
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contrib/postgres_fdw/postgres_fdw.h
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@ -103,6 +103,8 @@ extern PGconn *GetConnection(UserMapping *user, bool will_prep_stmt);
extern void ReleaseConnection(PGconn *conn);
extern unsigned int GetCursorNumber(PGconn *conn);
extern unsigned int GetPrepStmtNumber(PGconn *conn);
extern PGresult *pgfdw_get_result(PGconn *conn, const char *query);
extern PGresult *pgfdw_exec_query(PGconn *conn, const char *query);
extern void pgfdw_report_error(int elevel, PGresult *res, PGconn *conn,
bool clear, const char *sql);