SQLite

Check-in [58acc2a8b3]
Login

Many hyperlinks are disabled.
Use anonymous login to enable hyperlinks.

Overview
Comment:Allow an automatic index on a WHERE constraint where the RHS is does not reference another table as long as the RHS is not a constant.
Downloads: Tarball | ZIP archive
Timelines: family | ancestors | descendants | both | autoindex-improvements
Files: files | file ages | folders
SHA1: 58acc2a8b38c5f13175c191697b4d2b663db1872
User & Date: drh 2014-06-17 09:00:54.229
Context
2014-06-17
09:52
Simplification to the logic that prevents automatic indexes from being formed on constant expressions. (check-in: 36d67e1dd2 user: drh tags: autoindex-improvements)
09:00
Allow an automatic index on a WHERE constraint where the RHS is does not reference another table as long as the RHS is not a constant. (check-in: 58acc2a8b3 user: drh tags: autoindex-improvements)
02:46
Do not attempt to create an automatic index on a constant constraint, as doing so is pointless. (check-in: d6883e960f user: drh tags: autoindex-improvements)
Changes
Unified Diff Ignore Whitespace Patch
Changes to ext/rtree/rtree6.test.
88
89
90
91
92
93
94
95
96
97
98
99






100
101
102
103
104
105
106
do_eqp_test rtree6.2.3 {
  SELECT * FROM t1,t2 WHERE k=ii
} {
  0 0 0 {SCAN TABLE t1 VIRTUAL TABLE INDEX 2:} 
  0 1 1 {SEARCH TABLE t2 USING INTEGER PRIMARY KEY (rowid=?)}
}

do_eqp_test rtree6.2.4 {
  SELECT * FROM t1,t2 WHERE v=10 and x1<10 and x2>10
} {
  0 0 0 {SCAN TABLE t1 VIRTUAL TABLE INDEX 2:C0E1} 
  0 1 1 {SEARCH TABLE t2 USING AUTOMATIC COVERING INDEX (v=?)}






}

do_eqp_test rtree6.2.5 {
  SELECT * FROM t1,t2 WHERE k=ii AND x1<v
} {
  0 0 0 {SCAN TABLE t1 VIRTUAL TABLE INDEX 2:} 
  0 1 1 {SEARCH TABLE t2 USING INTEGER PRIMARY KEY (rowid=?)}







|
|



>
>
>
>
>
>







88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
do_eqp_test rtree6.2.3 {
  SELECT * FROM t1,t2 WHERE k=ii
} {
  0 0 0 {SCAN TABLE t1 VIRTUAL TABLE INDEX 2:} 
  0 1 1 {SEARCH TABLE t2 USING INTEGER PRIMARY KEY (rowid=?)}
}

do_eqp_test rtree6.2.4.1 {
  SELECT * FROM t1,t2 WHERE v=+ii and x1<10 and x2>10
} {
  0 0 0 {SCAN TABLE t1 VIRTUAL TABLE INDEX 2:C0E1} 
  0 1 1 {SEARCH TABLE t2 USING AUTOMATIC COVERING INDEX (v=?)}
}
do_eqp_test rtree6.2.4.2 {
  SELECT * FROM t1,t2 WHERE v=10 and x1<10 and x2>10
} {
  0 0 0 {SCAN TABLE t1 VIRTUAL TABLE INDEX 2:C0E1} 
  0 1 1 {SCAN TABLE t2}
}

do_eqp_test rtree6.2.5 {
  SELECT * FROM t1,t2 WHERE k=ii AND x1<v
} {
  0 0 0 {SCAN TABLE t1 VIRTUAL TABLE INDEX 2:} 
  0 1 1 {SEARCH TABLE t2 USING INTEGER PRIMARY KEY (rowid=?)}
Changes to src/where.c.
4525
4526
4527
4528
4529
4530
4531
4532



4533
4534
4535
4536
4537
4538
4539
   && !pSrc->isRecursive
  ){
    /* Generate auto-index WhereLoops */
    WhereTerm *pTerm;
    WhereTerm *pWCEnd = pWC->a + pWC->nTerm;
    for(pTerm=pWC->a; rc==SQLITE_OK && pTerm<pWCEnd; pTerm++){
      if( pTerm->prereqRight & pNew->maskSelf ) continue;
      if( pTerm->prereqRight==0 ) continue;



      if( termCanDriveIndex(pTerm, pSrc, 0) ){
        pNew->u.btree.nEq = 1;
        pNew->u.btree.nSkip = 0;
        pNew->u.btree.pIndex = 0;
        pNew->nLTerm = 1;
        pNew->aLTerm[0] = pTerm;
        /* TUNING: One-time cost for computing the automatic index is







|
>
>
>







4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
   && !pSrc->isRecursive
  ){
    /* Generate auto-index WhereLoops */
    WhereTerm *pTerm;
    WhereTerm *pWCEnd = pWC->a + pWC->nTerm;
    for(pTerm=pWC->a; rc==SQLITE_OK && pTerm<pWCEnd; pTerm++){
      if( pTerm->prereqRight & pNew->maskSelf ) continue;
      if( pTerm->prereqRight==0
       && sqlite3ExprIsConstant(pTerm->pExpr->pRight) ){
        continue;
      }
      if( termCanDriveIndex(pTerm, pSrc, 0) ){
        pNew->u.btree.nEq = 1;
        pNew->u.btree.nSkip = 0;
        pNew->u.btree.pIndex = 0;
        pNew->nLTerm = 1;
        pNew->aLTerm[0] = pTerm;
        /* TUNING: One-time cost for computing the automatic index is
Changes to test/tpch01.test.
164
165
166
167
168
169
170
171



172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187


               o_year
       order by
               o_year;}]
  set ::eqpres
} {/0 0 0 {SEARCH TABLE part USING INDEX bootleg_pti .P_TYPE=..} 0 1 2 {SEARCH TABLE lineitem USING INDEX lpki2 .L_PARTKEY=..}.*/}
do_test tpch01-1.1b {
  set ::eqpres
} {/.* customer .* nation AS n1 .* nation AS n2 .*/}




do_eqp_test tpch01-1.2 {
select
    c_custkey,    c_name,    sum(l_extendedprice * (1 - l_discount)) as revenue,
    c_acctbal,    n_name,    c_address,    c_phone,    c_comment
from
    customer,    orders,    lineitem,    nation
where
    c_custkey = o_custkey    and l_orderkey = o_orderkey
    and o_orderdate >=  '1994-08-01'    and o_orderdate < date('1994-08-01', '+3 month')
    and l_returnflag = 'R'    and c_nationkey = n_nationkey
group by
    c_custkey,    c_name,    c_acctbal,    c_phone,    n_name, c_address,    c_comment
order by
    revenue desc;
} {0 0 1 {SEARCH TABLE orders USING INDEX odi (O_ORDERDATE>? AND O_ORDERDATE<?)} 0 1 0 {SEARCH TABLE customer USING INDEX cpki (C_CUSTKEY=?)} 0 2 3 {SEARCH TABLE nation USING INDEX npki (N_NATIONKEY=?)} 0 3 2 {SEARCH TABLE lineitem USING INDEX lpki (L_ORDERKEY=?)} 0 0 0 {USE TEMP B-TREE FOR GROUP BY} 0 0 0 {USE TEMP B-TREE FOR ORDER BY}}









|
>
>
>
















>
>
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
               o_year
       order by
               o_year;}]
  set ::eqpres
} {/0 0 0 {SEARCH TABLE part USING INDEX bootleg_pti .P_TYPE=..} 0 1 2 {SEARCH TABLE lineitem USING INDEX lpki2 .L_PARTKEY=..}.*/}
do_test tpch01-1.1b {
  set ::eqpres
} {/.* customer .* nation AS n1 .*/}
do_test tpch01-1.1c {
  set ::eqpres
} {/.* supplier .* nation AS n2 .*/}

do_eqp_test tpch01-1.2 {
select
    c_custkey,    c_name,    sum(l_extendedprice * (1 - l_discount)) as revenue,
    c_acctbal,    n_name,    c_address,    c_phone,    c_comment
from
    customer,    orders,    lineitem,    nation
where
    c_custkey = o_custkey    and l_orderkey = o_orderkey
    and o_orderdate >=  '1994-08-01'    and o_orderdate < date('1994-08-01', '+3 month')
    and l_returnflag = 'R'    and c_nationkey = n_nationkey
group by
    c_custkey,    c_name,    c_acctbal,    c_phone,    n_name, c_address,    c_comment
order by
    revenue desc;
} {0 0 1 {SEARCH TABLE orders USING INDEX odi (O_ORDERDATE>? AND O_ORDERDATE<?)} 0 1 0 {SEARCH TABLE customer USING INDEX cpki (C_CUSTKEY=?)} 0 2 3 {SEARCH TABLE nation USING INDEX npki (N_NATIONKEY=?)} 0 3 2 {SEARCH TABLE lineitem USING INDEX lpki (L_ORDERKEY=?)} 0 0 0 {USE TEMP B-TREE FOR GROUP BY} 0 0 0 {USE TEMP B-TREE FOR ORDER BY}}

finish_test