diff options
Diffstat (limited to 'src/backend/parser/gram.y')
| -rw-r--r-- | src/backend/parser/gram.y | 62 |
1 files changed, 42 insertions, 20 deletions
diff --git a/src/backend/parser/gram.y b/src/backend/parser/gram.y index c1b0cff1c9..682748eb4b 100644 --- a/src/backend/parser/gram.y +++ b/src/backend/parser/gram.y @@ -275,6 +275,7 @@ static Node *makeRecursiveViewSelect(char *relname, List *aliases, Node *query); struct SelectLimit *selectlimit; SetQuantifier setquantifier; struct GroupClause *groupclause; + MergeMatchKind mergematch; MergeWhenClause *mergewhen; struct KeyActions *keyactions; struct KeyAction *keyaction; @@ -516,6 +517,7 @@ static Node *makeRecursiveViewSelect(char *relname, List *aliases, Node *query); %type <onconflict> opt_on_conflict %type <mergewhen> merge_insert merge_update merge_delete +%type <mergematch> merge_when_tgt_matched merge_when_tgt_not_matched %type <node> merge_when_clause opt_merge_when_condition %type <list> merge_when_list @@ -770,11 +772,11 @@ static Node *makeRecursiveViewSelect(char *relname, List *aliases, Node *query); SAVEPOINT SCALAR SCHEMA SCHEMAS SCROLL SEARCH SECOND_P SECURITY SELECT SEQUENCE SEQUENCES SERIALIZABLE SERVER SESSION SESSION_USER SET SETS SETOF SHARE SHOW - SIMILAR SIMPLE SKIP SMALLINT SNAPSHOT SOME SQL_P STABLE STANDALONE_P + SIMILAR SIMPLE SKIP SMALLINT SNAPSHOT SOME SOURCE SQL_P STABLE STANDALONE_P START STATEMENT STATISTICS STDIN STDOUT STORAGE STORED STRICT_P STRING_P STRIP_P SUBSCRIPTION SUBSTRING SUPPORT SYMMETRIC SYSID SYSTEM_P SYSTEM_USER - TABLE TABLES TABLESAMPLE TABLESPACE TEMP TEMPLATE TEMPORARY TEXT_P THEN + TABLE TABLES TABLESAMPLE TABLESPACE TARGET TEMP TEMPLATE TEMPORARY TEXT_P THEN TIES TIME TIMESTAMP TO TRAILING TRANSACTION TRANSFORM TREAT TRIGGER TRIM TRUE_P TRUNCATE TRUSTED TYPE_P TYPES_P @@ -12424,50 +12426,66 @@ merge_when_list: | merge_when_list merge_when_clause { $$ = lappend($1,$2); } ; +/* + * A WHEN clause may be WHEN MATCHED, WHEN NOT MATCHED BY SOURCE, or WHEN NOT + * MATCHED [BY TARGET]. The first two cases match target tuples, and support + * UPDATE/DELETE/DO NOTHING actions. The third case does not match target + * tuples, and only supports INSERT/DO NOTHING actions. + */ merge_when_clause: - WHEN MATCHED opt_merge_when_condition THEN merge_update + merge_when_tgt_matched opt_merge_when_condition THEN merge_update { - $5->matched = true; - $5->condition = $3; + $4->matchKind = $1; + $4->condition = $2; - $$ = (Node *) $5; + $$ = (Node *) $4; } - | WHEN MATCHED opt_merge_when_condition THEN merge_delete + | merge_when_tgt_matched opt_merge_when_condition THEN merge_delete { - $5->matched = true; - $5->condition = $3; + $4->matchKind = $1; + $4->condition = $2; - $$ = (Node *) $5; + $$ = (Node *) $4; } - | WHEN NOT MATCHED opt_merge_when_condition THEN merge_insert + | merge_when_tgt_not_matched opt_merge_when_condition THEN merge_insert { - $6->matched = false; - $6->condition = $4; + $4->matchKind = $1; + $4->condition = $2; - $$ = (Node *) $6; + $$ = (Node *) $4; } - | WHEN MATCHED opt_merge_when_condition THEN DO NOTHING + | merge_when_tgt_matched opt_merge_when_condition THEN DO NOTHING { MergeWhenClause *m = makeNode(MergeWhenClause); - m->matched = true; + m->matchKind = $1; m->commandType = CMD_NOTHING; - m->condition = $3; + m->condition = $2; $$ = (Node *) m; } - | WHEN NOT MATCHED opt_merge_when_condition THEN DO NOTHING + | merge_when_tgt_not_matched opt_merge_when_condition THEN DO NOTHING { MergeWhenClause *m = makeNode(MergeWhenClause); - m->matched = false; + m->matchKind = $1; m->commandType = CMD_NOTHING; - m->condition = $4; + m->condition = $2; $$ = (Node *) m; } ; +merge_when_tgt_matched: + WHEN MATCHED { $$ = MERGE_WHEN_MATCHED; } + | WHEN NOT MATCHED BY SOURCE { $$ = MERGE_WHEN_NOT_MATCHED_BY_SOURCE; } + ; + +merge_when_tgt_not_matched: + WHEN NOT MATCHED { $$ = MERGE_WHEN_NOT_MATCHED_BY_TARGET; } + | WHEN NOT MATCHED BY TARGET { $$ = MERGE_WHEN_NOT_MATCHED_BY_TARGET; } + ; + opt_merge_when_condition: AND a_expr { $$ = $2; } | { $$ = NULL; } @@ -17576,6 +17594,7 @@ unreserved_keyword: | SIMPLE | SKIP | SNAPSHOT + | SOURCE | SQL_P | STABLE | STANDALONE_P @@ -17595,6 +17614,7 @@ unreserved_keyword: | SYSTEM_P | TABLES | TABLESPACE + | TARGET | TEMP | TEMPLATE | TEMPORARY @@ -18206,6 +18226,7 @@ bare_label_keyword: | SMALLINT | SNAPSHOT | SOME + | SOURCE | SQL_P | STABLE | STANDALONE_P @@ -18230,6 +18251,7 @@ bare_label_keyword: | TABLES | TABLESAMPLE | TABLESPACE + | TARGET | TEMP | TEMPLATE | TEMPORARY |