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Commit5cb86a2

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postgres_fdw: Fix unexpected reporting of empty message.
pgfdw_report_error() in postgres_fdw gets a message from PGresult orPGconn to report an error received from a remote server. Previouslyif it could get a message from neither of them, it reported emptymessage unexpectedly. The cause of this issue was that pgfdw_report_error()didn't handle properly the case where no message could be obtainedand its local variable message_primary was set to '\0'.This commit improves pgfdw_report_error() so that it reports the message"could not obtain ..." when it gets no message and message_primaryis set to '\0'. This is the same behavior as when message_primary is NULL.dblink_res_error() in dblink has the same issue, so this commit alsoimproves it in the same way.Back-patch to all supported branches.Author: Fujii MasaoReviewed-by: Bharath RupireddyDiscussion:https://postgr.es/m/477c16c8-7ea4-20fc-38d5-ed3a77ed616c@oss.nttdata.com
1 parent4cd2928 commit5cb86a2

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2 files changed

+4
-2
lines changed

2 files changed

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‎contrib/dblink/dblink.c

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -2799,7 +2799,8 @@ dblink_res_error(PGconn *conn, const char *conname, PGresult *res,
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ereport(level,
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(errcode(sqlstate),
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message_primary ?errmsg_internal("%s",message_primary) :
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(message_primary!=NULL&&message_primary[0]!='\0') ?
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errmsg_internal("%s",message_primary) :
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errmsg("could not obtain message string for remote error"),
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message_detail ?errdetail_internal("%s",message_detail) :0,
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message_hint ?errhint("%s",message_hint) :0,

‎contrib/postgres_fdw/connection.c

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -805,7 +805,8 @@ pgfdw_report_error(int elevel, PGresult *res, PGconn *conn,
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ereport(elevel,
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(errcode(sqlstate),
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message_primary ?errmsg_internal("%s",message_primary) :
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(message_primary!=NULL&&message_primary[0]!='\0') ?
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errmsg_internal("%s",message_primary) :
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errmsg("could not obtain message string for remote error"),
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message_detail ?errdetail_internal("%s",message_detail) :0,
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message_hint ?errhint("%s",message_hint) :0,

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