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| author | Peter Eisentraut <peter@eisentraut.org> | 2021-02-01 13:54:59 +0100 |
|---|---|---|
| committer | Peter Eisentraut <peter@eisentraut.org> | 2021-02-01 14:32:51 +0100 |
| commit | 3696a600e2292d43c00949ddf0352e4ebb487e5b (patch) | |
| tree | 11f19c8c9e5757c44b8da02d0e1f7b41f8ec5f13 /src/backend/parser/parse_agg.c | |
| parent | bb513b364b4fe31574574c8d0afbb2255268b321 (diff) | |
| download | postgresql-3696a600e2292d43c00949ddf0352e4ebb487e5b.tar.gz postgresql-3696a600e2292d43c00949ddf0352e4ebb487e5b.zip | |
SEARCH and CYCLE clauses
This adds the SQL standard feature that adds the SEARCH and CYCLE
clauses to recursive queries to be able to do produce breadth- or
depth-first search orders and detect cycles. These clauses can be
rewritten into queries using existing syntax, and that is what this
patch does in the rewriter.
Reviewed-by: Vik Fearing <vik@postgresfriends.org>
Reviewed-by: Pavel Stehule <pavel.stehule@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/db80ceee-6f97-9b4a-8ee8-3ba0c58e5be2@2ndquadrant.com
Diffstat (limited to 'src/backend/parser/parse_agg.c')
| -rw-r--r-- | src/backend/parser/parse_agg.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/backend/parser/parse_agg.c b/src/backend/parser/parse_agg.c index 588f005dd93..fd08b9eeff0 100644 --- a/src/backend/parser/parse_agg.c +++ b/src/backend/parser/parse_agg.c @@ -545,6 +545,10 @@ check_agglevels_and_constraints(ParseState *pstate, Node *expr) break; + case EXPR_KIND_CYCLE_MARK: + errkind = true; + break; + /* * There is intentionally no default: case here, so that the * compiler will warn if we add a new ParseExprKind without @@ -933,6 +937,9 @@ transformWindowFuncCall(ParseState *pstate, WindowFunc *wfunc, case EXPR_KIND_GENERATED_COLUMN: err = _("window functions are not allowed in column generation expressions"); break; + case EXPR_KIND_CYCLE_MARK: + errkind = true; + break; /* * There is intentionally no default: case here, so that the |