diff options
| author | Alvaro Herrera | 2022-08-12 10:05:50 +0000 |
|---|---|---|
| committer | Alvaro Herrera | 2022-08-12 10:05:50 +0000 |
| commit | 92af9143f13df8c54362ebbd4397cb53f207ff2d (patch) | |
| tree | 910a3a67d8aeb757872f24578c7052a9698fd09f /src/backend/commands/copy.c | |
| parent | e7a552f303c56788d52ca4e46490236845662734 (diff) | |
Reject MERGE in CTEs and COPY
The grammar added for MERGE inadvertently made it accepted syntax in
places that were not prepared to deal with it -- namely COPY and inside
CTEs, but invoking these things with MERGE currently causes assertion
failures or weird misbehavior in non-assertion builds. Protect those
places by checking for it explicitly until somebody decides to implement
it.
Reported-by: Alexey Borzov <borz_off@cs.msu.su>
Discussion: https://postgr.es/m/17579-82482cd7b267b862@postgresql.org
Diffstat (limited to 'src/backend/commands/copy.c')
| -rw-r--r-- | src/backend/commands/copy.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/backend/commands/copy.c b/src/backend/commands/copy.c index 3ac731803bd..49924e476af 100644 --- a/src/backend/commands/copy.c +++ b/src/backend/commands/copy.c @@ -273,6 +273,12 @@ DoCopy(ParseState *pstate, const CopyStmt *stmt, { Assert(stmt->query); + /* MERGE is allowed by parser, but unimplemented. Reject for now */ + if (IsA(stmt->query, MergeStmt)) + ereport(ERROR, + errcode(ERRCODE_FEATURE_NOT_SUPPORTED), + errmsg("MERGE not supported in COPY")); + query = makeNode(RawStmt); query->stmt = stmt->query; query->stmt_location = stmt_location; |