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Fix a problem with CASTs and the new CSE mechanism. (CVS 4950)

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FossilOrigin-Name: e25939fb25ec8bde8500a672ca5be3cbb514ac3a
This commit is contained in:
drh
2008-04-01 12:24:11 +00:00
parent da250ea599
commit b3843a82ea
4 changed files with 24 additions and 10 deletions
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15
test/cse.test
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@ -13,7 +13,7 @@
# factoring constant expressions out of loops and for
# common subexpression eliminations.
#
# $Id: cse.test,v 1.2 2008/04/01 03:27:39 drh Exp $
# $Id: cse.test,v 1.3 2008/04/01 12:24:11 drh Exp $
#
set testdir [file dirname $argv0]
@ -64,6 +64,19 @@ do_test cse-1.8 {
SELECT a, a%a, a==a, a!=a, a<a, a<=a, a IS NULL, a NOT NULL, a FROM t1
}
} {1 0 1 0 0 1 0 1 1 2 0 1 0 0 1 0 1 2}
do_test cse-1.9 {
execsql {
SELECT NOT b, ~b, NOT NOT b, b FROM t1
}
} {0 -12 1 11 0 -22 1 21}
do_test cse-1.10 {
explain {
SELECT CAST(b AS integer), typeof(b), CAST(b AS text), typeof(b) FROM t1
}
execsql {
SELECT CAST(b AS integer), typeof(b), CAST(b AS text), typeof(b) FROM t1
}
} {11 integer 11 integer 21 integer 21 integer}
# Overflow the column cache. Create queries involving more and more
# columns until the cache overflows. Verify correct operation throughout.