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COALESCE() and NULLIF() are now first-class expressions, not macros

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that turn into CASE expressions.  They evaluate their arguments at most
once.  Patch by Kris Jurka, review and (very light) editorializing by me.
This commit is contained in:
Tom Lane
2003-02-16 02:30:39 +00:00
parent de25638d2f
commit 51972a9d5d
22 changed files with 644 additions and 107 deletions
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52
src/test/regress/expected/case.out
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@@ -154,32 +154,32 @@ SELECT * FROM CASE_TBL WHERE NULLIF(f,i) = 2;
SELECT COALESCE(a.f, b.i, b.j)
FROM CASE_TBL a, CASE2_TBL b;
case
-------
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coalesce
----------
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(24 rows)
SELECT *