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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2004-05-10 22:44:49 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2004-05-10 22:44:49 +0000 |
| commit | 2f63232d30ca64a8f2684af855230f23a701d371 (patch) | |
| tree | b7a7707d1ec9edf368780cd3f4a23755527c5884 /src/backend/nodes/readfuncs.c | |
| parent | 9a939886ac782cfee3cd5fdd1c58689163ed84be (diff) | |
| download | postgresql-2f63232d30ca64a8f2684af855230f23a701d371.tar.gz postgresql-2f63232d30ca64a8f2684af855230f23a701d371.zip | |
Promote row expressions to full-fledged citizens of the expression syntax,
rather than allowing them only in a few special cases as before. In
particular you can now pass a ROW() construct to a function that accepts
a rowtype parameter. Internal generation of RowExprs fixes a number of
corner cases that used to not work very well, such as referencing the
whole-row result of a JOIN or subquery. This represents a further step in
the work I started a month or so back to make rowtype values into
first-class citizens.
Diffstat (limited to 'src/backend/nodes/readfuncs.c')
| -rw-r--r-- | src/backend/nodes/readfuncs.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/src/backend/nodes/readfuncs.c b/src/backend/nodes/readfuncs.c index ebd3c636c29..253b5a3eafa 100644 --- a/src/backend/nodes/readfuncs.c +++ b/src/backend/nodes/readfuncs.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/nodes/readfuncs.c,v 1.168 2004/05/08 21:21:18 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/nodes/readfuncs.c,v 1.169 2004/05/10 22:44:44 tgl Exp $ * * NOTES * Path and Plan nodes do not have any readfuncs support, because we @@ -629,6 +629,21 @@ _readArrayExpr(void) } /* + * _readRowExpr + */ +static RowExpr * +_readRowExpr(void) +{ + READ_LOCALS(RowExpr); + + READ_NODE_FIELD(args); + READ_OID_FIELD(row_typeid); + READ_ENUM_FIELD(row_format, CoercionForm); + + READ_DONE(); +} + +/* * _readCoalesceExpr */ static CoalesceExpr * @@ -978,6 +993,8 @@ parseNodeString(void) return_value = _readCaseTestExpr(); else if (MATCH("ARRAY", 5)) return_value = _readArrayExpr(); + else if (MATCH("ROW", 3)) + return_value = _readRowExpr(); else if (MATCH("COALESCE", 8)) return_value = _readCoalesceExpr(); else if (MATCH("NULLIFEXPR", 10)) |