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Improve parse representation for MERGE

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Separation of parser data structures from executor, as
requested by Tom Lane. Further improvements possible.

While there, implement error for multiple VALUES clauses via parser
to allow line number of error, as requested by Andres Freund.

Author: Pavan Deolasee

Discussion: https://www.postgresql.org/message-id/CABOikdPpqjectFchg0FyTOpsGXyPoqwgC==OLKWuxgBOsrDDZw@mail.gmail.com
This commit is contained in:
Simon Riggs
2018-04-06 09:38:59 +01:00
parent 3b0b4f31f7
commit f1464c5380
11 changed files with 207 additions and 148 deletions
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4
src/test/regress/expected/merge.out
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@ -90,7 +90,9 @@ USING source AS s
ON t.tid = s.sid
WHEN NOT MATCHED THEN
INSERT VALUES (1,1), (2,2);
ERROR: Multiple VALUES clauses not allowed in MERGE INSERT statement
ERROR: syntax error at or near ","
LINE 5: INSERT VALUES (1,1), (2,2);
^
;
-- SELECT query for INSERT
MERGE INTO target t