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Whenever a generated column is used, assume that all columns are used.

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FossilOrigin-Name: 6601da58032d18ae00b466c0f2077fb2b1ecd84225b56e1787724bea478eedc9
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drh 2019-11-21 19:37:00 +00:00
parent 57f7ece784
commit 522ebfa7ce
4 changed files with 33 additions and 14 deletions
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14
manifest
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@ -1,5 +1,5 @@
C Fix\sa\sproblem\sthat\scomes\sup\swhen\susing\sgenerated\scolumns\sthat\sevaluate\sto\sa\nconstant\sin\san\sindex\sand\sthen\smaking\suse\sof\sthat\sindex\sin\sa\sjoin.
D 2019-11-21T18:28:44.463
C Whenever\sa\sgenerated\scolumn\sis\sused,\sassume\sthat\sall\scolumns\sare\sused.
D 2019-11-21T19:37:00.986
F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@ -524,7 +524,7 @@ F src/pragma.h ec3b31eac9b1df040f1cc8cb3d89bc06605c3b4cb3d76f833de8d6d6c3f77f04
F src/prepare.c 6049beb71385f017af6fc320d2c75a4e50b75e280c54232442b785fbb83df057
F src/printf.c 9be6945837c839ba57837b4bc3af349eba630920fa5532aa518816defe42a7d4
F src/random.c 80f5d666f23feb3e6665a6ce04c7197212a88384
F src/resolve.c cf2391c93d425455388389e7a47674b9da107d2ed69ebf49979044d70dbeb045
F src/resolve.c 023397b50d09a3587a15169b713342e2d595ab29e14e54fd8f4a86b76c461d21
F src/rowset.c d977b011993aaea002cab3e0bb2ce50cf346000dff94e944d547b989f4b1fe93
F src/select.c 50ccaf5fc3566b897fd3090b63bd60605f2f3f38ac5709fda6c482510d71aa6c
F src/shell.c.in 4a3a9e1c11847b1904f2b01d087af1c052f660902755abab457cab1756817ded
@ -1021,7 +1021,7 @@ F test/fuzzer1.test 3d4c4b7e547aba5e5511a2991e3e3d07166cfbb8
F test/fuzzer2.test a85ef814ce071293bce1ad8dffa217cbbaad4c14
F test/fuzzerfault.test 8792cd77fd5bce765b05d0c8e01b9edcf8af8536
F test/gcfault.test dd28c228a38976d6336a3fc42d7e5f1ad060cb8c
F test/gencol1.test cb18ae911ed157058ea030988463bd1ec3315ba889b4aff4b8711551c393afae
F test/gencol1.test 6bdf7fbaa001321d01f35f7c33ccb847cf937b760877b9a32723e009983c13f7
F test/genesis.tcl 1e2e2e8e5cc4058549a154ff1892fe5c9de19f98
F test/having.test e4098a4b8962f9596035c3b87a8928a10648acc509f1bb8d6f96413bbf79a1b3
F test/hexlit.test 4a6a5f46e3c65c4bf1fa06f5dd5a9507a5627751
@ -1850,7 +1850,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
P 2d53a30cc23e53033af8e8666457654db5dcc453ed6cd176ce1d0bff4f528159
R 916b27815e9b3d41c41616a867889cc0
P 8b12e95fec7ce6e0de82a04ca3dfcf1a8e62e233b7382aa28a8a9be6e862b1af
R e99d34ba61fb6b297b18cc8c33e9b417
U drh
Z 2f4253a7507c4c18153791477951e376
Z 29f405b4db68236e1fc771220e887d13

2
manifest.uuid
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@ -1 +1 @@
8b12e95fec7ce6e0de82a04ca3dfcf1a8e62e233b7382aa28a8a9be6e862b1af
6601da58032d18ae00b466c0f2077fb2b1ecd84225b56e1787724bea478eedc9

20
src/resolve.c
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@ -551,9 +551,18 @@ static int lookupName(
/* If a column from a table in pSrcList is referenced, then record
** this fact in the pSrcList.a[].colUsed bitmask. Column 0 causes
** bit 0 to be set. Column 1 sets bit 1. And so forth. If the
** column number is greater than the number of bits in the bitmask
** then set the high-order bit of the bitmask.
** bit 0 to be set. Column 1 sets bit 1. And so forth.
**
** The colUsed mask is an optimization used to help determine if an
** index is a covering index. The correct answer is still obtained
** if the mask contains extra bits. But omitting bits from the mask
** might result in an incorrect answer.
**
** The high-order bit of the mask is a "we-use-them-all" bit.
** If the column number is greater than the number of bits in the bitmask
** then set the high-order bit of the bitmask. Also set the high-order
** bit if the column is a generated column, as that adds dependencies
** that are difficult to track, so we assume that all columns are used.
*/
if( pExpr->iColumn>=0 && pMatch!=0 ){
int n = pExpr->iColumn;
@ -561,7 +570,12 @@ static int lookupName(
if( n>=BMS ){
n = BMS-1;
}
assert( pExpr->y.pTab!=0 );
assert( pMatch->iCursor==pExpr->iTable );
if( pExpr->y.pTab->tabFlags & TF_HasGenerated ){
Column *pCol = pExpr->y.pTab->aCol + pExpr->iColumn;
if( pCol->colFlags & COLFLAG_GENERATED ) n = BMS-1;
}
pMatch->colUsed |= ((Bitmask)1)<<n;
}

11
test/gencol1.test
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@ -246,14 +246,19 @@ do_catchsql_test gencol1-8.20 {
# 2019-11-21 Problems in the new generated column logic
# reported by Yongheng Chen and Rui Zhong
do_execsql_test gencol1-9.10 {
DROP TABLE IF EXISTS t1;
DROP TABLE IF EXISTS t2;
DROP TABLE t1;
CREATE TABLE t1(aa , bb AS (17) UNIQUE);
INSERT INTO t1 VALUES(17);
CREATE TABLE t2(cc);
INSERT INTO t2 VALUES(41);
SELECT * FROM t2 JOIN t1 WHERE t1.bb=t1.aa AND t1.bb=17;
} {41 17 17}
do_execsql_test gencol1-9.20 {
CREATE TABLE t3(aa INT PRIMARY KEY, bb UNIQUE AS(aa));
INSERT INTO t3 VALUES(1);
SELECT 100, * FROM t3;
DELETE FROM t3 WHERE (SELECT bb FROM t3);
SELECT 200, * FROM t3;
} {100 1 1}
finish_test