000001  # 2013-11-04
000002  #
000003  # The author disclaims copyright to this source code.  In place of
000004  # a legal notice, here is a blessing:
000005  #
000006  #    May you do good and not evil.
000007  #    May you find forgiveness for yourself and forgive others.
000008  #    May you share freely, never taking more than you give.
000009  #
000010  #***********************************************************************
000011  #
000012  # Test cases for partial indices in WITHOUT ROWID tables
000013  #
000014  
000015  
000016  set testdir [file dirname $argv0]
000017  source $testdir/tester.tcl
000018  
000019  ifcapable !vtab {
000020    finish_test
000021    return
000022  }
000023  
000024  # Capture the output of a pragma in a TEMP table.
000025  #
000026  proc capture_pragma {db tabname sql} {
000027    $db eval "DROP TABLE IF EXISTS temp.$tabname"
000028    set once 1
000029    $db eval $sql x {
000030      if {$once} {
000031        set once 0
000032        set ins "INSERT INTO $tabname VALUES"
000033        set crtab "CREATE TEMP TABLE $tabname "
000034        set sep "("
000035        foreach col $x(*) {
000036          append ins ${sep}\$x($col)
000037          append crtab ${sep}\"$col\"
000038          set sep ,
000039        }
000040        append ins )
000041        append crtab )
000042        $db eval $crtab
000043      }
000044      $db eval $ins
000045    }
000046  }
000047  
000048  
000049  load_static_extension db wholenumber;
000050  do_test index7-1.1 {
000051    # Able to parse and manage partial indices
000052    execsql {
000053      CREATE TABLE t1(a,b,c PRIMARY KEY) WITHOUT rowid;
000054      CREATE INDEX t1a ON t1(a) WHERE a IS NOT NULL;
000055      CREATE INDEX t1b ON t1(b) WHERE b>10;
000056      CREATE VIRTUAL TABLE nums USING wholenumber;
000057      INSERT INTO t1(a,b,c)
000058         SELECT CASE WHEN value%3!=0 THEN value END, value, value
000059           FROM nums WHERE value<=20;
000060      SELECT count(a), count(b) FROM t1;
000061      PRAGMA integrity_check;
000062    }
000063  } {14 20 ok}
000064  
000065  # (The "partial" column of the PRAGMA index_list output is...)
000066  # EVIDENCE-OF: R-34457-09668 "1" if the index is a partial index and "0"
000067  # if not.
000068  #
000069  do_test index7-1.1a {
000070    capture_pragma db out {PRAGMA index_list(t1)}
000071    db eval {SELECT "name", "partial", '|' FROM out ORDER BY "name"}
000072  } {sqlite_autoindex_t1_1 0 | t1a 1 | t1b 1 |}
000073  
000074  # Make sure the count(*) optimization works correctly with
000075  # partial indices.  Ticket [a5c8ed66cae16243be6] 2013-10-03.
000076  #
000077  do_execsql_test index7-1.1.1 {
000078    SELECT count(*) FROM t1;
000079  } {20}
000080  
000081  # Error conditions during parsing...
000082  #
000083  do_test index7-1.2 {
000084    catchsql {
000085      CREATE INDEX bad1 ON t1(a,b) WHERE x IS NOT NULL;
000086    }
000087  } {1 {no such column: x}}
000088  do_test index7-1.3 {
000089    catchsql {
000090      CREATE INDEX bad1 ON t1(a,b) WHERE EXISTS(SELECT * FROM t1);
000091    }
000092  } {1 {subqueries prohibited in partial index WHERE clauses}}
000093  do_test index7-1.4 {
000094    catchsql {
000095      CREATE INDEX bad1 ON t1(a,b) WHERE a!=?1;
000096    }
000097  } {1 {parameters prohibited in partial index WHERE clauses}}
000098  do_test index7-1.5 {
000099    catchsql {
000100      CREATE INDEX bad1 ON t1(a,b) WHERE a!=random();
000101    }
000102  } {1 {non-deterministic functions prohibited in partial index WHERE clauses}}
000103  do_test index7-1.6 {
000104    catchsql {
000105      CREATE INDEX bad1 ON t1(a,b) WHERE a NOT LIKE 'abc%';
000106    }
000107  } {0 {}}
000108  do_execsql_test index7-1.7 {
000109    INSERT INTO t1(a,b,c)
000110       VALUES('abcde',1,101),('abdef',2,102),('xyz',3,103),('abcz',4,104);
000111    SELECT c FROM t1 WHERE a NOT LIKE 'abc%' AND a=7 ORDER BY +b;
000112  } {7}
000113  do_execsql_test index7-1.7eqp {
000114    EXPLAIN QUERY PLAN
000115    SELECT b FROM t1 WHERE a NOT LIKE 'abc%' AND a=7 ORDER BY +b;
000116  } {/SEARCH TABLE t1 USING COVERING INDEX bad1 /}
000117  do_execsql_test index7-1.8 {
000118    DELETE FROM t1 WHERE c>=101;
000119    DROP INDEX IF EXISTS bad1;
000120  } {}
000121  
000122  do_test index7-1.10 {
000123    execsql {
000124      ANALYZE;
000125      SELECT idx, stat FROM sqlite_stat1 ORDER BY idx;
000126      PRAGMA integrity_check;
000127    }
000128  } {t1 {20 1} t1a {14 1} t1b {10 1} ok}
000129  
000130  # STAT1 shows the partial indices have a reduced number of
000131  # rows.
000132  #
000133  do_test index7-1.11 {
000134    execsql {
000135      UPDATE t1 SET a=b;
000136      ANALYZE;
000137      SELECT idx, stat FROM sqlite_stat1 ORDER BY idx;
000138      PRAGMA integrity_check;
000139    }
000140  } {t1 {20 1} t1a {20 1} t1b {10 1} ok}
000141  
000142  do_test index7-1.11b {
000143    execsql {
000144      UPDATE t1 SET a=NULL WHERE b%3!=0;
000145      UPDATE t1 SET b=b+100;
000146      ANALYZE;
000147      SELECT idx, stat FROM sqlite_stat1 ORDER BY idx;
000148      PRAGMA integrity_check;
000149    }
000150  } {t1 {20 1} t1a {6 1} t1b {20 1} ok}
000151  
000152  do_test index7-1.12 {
000153    execsql {
000154      UPDATE t1 SET a=CASE WHEN b%3!=0 THEN b END;
000155      UPDATE t1 SET b=b-100;
000156      ANALYZE;
000157      SELECT idx, stat FROM sqlite_stat1 ORDER BY idx;
000158      PRAGMA integrity_check;
000159    }
000160  } {t1 {20 1} t1a {13 1} t1b {10 1} ok}
000161  
000162  do_test index7-1.13 {
000163    execsql {
000164      DELETE FROM t1 WHERE b BETWEEN 8 AND 12;
000165      ANALYZE;
000166      SELECT idx, stat FROM sqlite_stat1 ORDER BY idx;
000167      PRAGMA integrity_check;
000168    }
000169  } {t1 {15 1} t1a {10 1} t1b {8 1} ok}
000170  
000171  do_test index7-1.14 {
000172    execsql {
000173      REINDEX;
000174      ANALYZE;
000175      SELECT idx, stat FROM sqlite_stat1 ORDER BY idx;
000176      PRAGMA integrity_check;
000177    }
000178  } {t1 {15 1} t1a {10 1} t1b {8 1} ok}
000179  
000180  do_test index7-1.15 {
000181    execsql {
000182      CREATE INDEX t1c ON t1(c);
000183      ANALYZE;
000184      SELECT idx, stat FROM sqlite_stat1 ORDER BY idx;
000185      PRAGMA integrity_check;
000186    }
000187  } {t1 {15 1} t1a {10 1} t1b {8 1} t1c {15 1} ok}
000188  
000189  # Queries use partial indices as appropriate times.
000190  #
000191  do_test index7-2.1 {
000192    execsql {
000193      CREATE TABLE t2(a,b PRIMARY KEY) without rowid;
000194      INSERT INTO t2(a,b) SELECT value, value FROM nums WHERE value<1000;
000195      UPDATE t2 SET a=NULL WHERE b%5==0;
000196      CREATE INDEX t2a1 ON t2(a) WHERE a IS NOT NULL;
000197      SELECT count(*) FROM t2 WHERE a IS NOT NULL;
000198    }
000199  } {800}
000200  do_test index7-2.2 {
000201    execsql {
000202      EXPLAIN QUERY PLAN
000203      SELECT * FROM t2 WHERE a=5;
000204    }
000205  } {/.* TABLE t2 USING COVERING INDEX t2a1 .*/}
000206  ifcapable stat4||stat3 {
000207    do_test index7-2.3stat4 {
000208      execsql {
000209        EXPLAIN QUERY PLAN
000210        SELECT * FROM t2 WHERE a IS NOT NULL;
000211      }
000212    } {/.* TABLE t2 USING COVERING INDEX t2a1 .*/}
000213  } else {
000214    do_test index7-2.3stat4 {
000215      execsql {
000216        EXPLAIN QUERY PLAN
000217        SELECT * FROM t2 WHERE a IS NOT NULL AND a>0;
000218      }
000219    } {/.* TABLE t2 USING COVERING INDEX t2a1 .*/}
000220  }
000221  do_test index7-2.4 {
000222    execsql {
000223      EXPLAIN QUERY PLAN
000224      SELECT * FROM t2 WHERE a IS NULL;
000225    }
000226  } {~/.*INDEX t2a1.*/}
000227  
000228  do_execsql_test index7-2.101 {
000229    DROP INDEX t2a1;
000230    UPDATE t2 SET a=b, b=b+10000;
000231    SELECT b FROM t2 WHERE a=15;
000232  } {10015}
000233  do_execsql_test index7-2.102 {
000234    CREATE INDEX t2a2 ON t2(a) WHERE a<100 OR a>200;
000235    SELECT b FROM t2 WHERE a=15;
000236    PRAGMA integrity_check;
000237  } {10015 ok}
000238  do_execsql_test index7-2.102eqp {
000239    EXPLAIN QUERY PLAN
000240    SELECT b FROM t2 WHERE a=15;
000241  } {~/.*INDEX t2a2.*/}
000242  do_execsql_test index7-2.103 {
000243    SELECT b FROM t2 WHERE a=15 AND a<100;
000244  } {10015}
000245  do_execsql_test index7-2.103eqp {
000246    EXPLAIN QUERY PLAN
000247    SELECT b FROM t2 WHERE a=15 AND a<100;
000248  } {/.*INDEX t2a2.*/}
000249  do_execsql_test index7-2.104 {
000250    SELECT b FROM t2 WHERE a=515 AND a>200;
000251  } {10515}
000252  do_execsql_test index7-2.104eqp {
000253    EXPLAIN QUERY PLAN
000254    SELECT b FROM t2 WHERE a=515 AND a>200;
000255  } {/.*INDEX t2a2.*/}
000256  
000257  # Partial UNIQUE indices
000258  #
000259  do_execsql_test index7-3.1 {
000260    CREATE TABLE t3(a,b PRIMARY KEY) without rowid;
000261    INSERT INTO t3 SELECT value, value FROM nums WHERE value<200;
000262    UPDATE t3 SET a=999 WHERE b%5!=0;
000263    CREATE UNIQUE INDEX t3a ON t3(a) WHERE a<>999;
000264  } {}
000265  do_test index7-3.2 {
000266    # unable to insert a duplicate row a-value that is not 999.
000267    catchsql {
000268      INSERT INTO t3(a,b) VALUES(150, 'test1');
000269    }
000270  } {1 {UNIQUE constraint failed: t3.a}}
000271  do_test index7-3.3 {
000272    # can insert multiple rows with a==999 because such rows are not
000273    # part of the unique index.
000274    catchsql {
000275      INSERT INTO t3(a,b) VALUES(999, 'test1'), (999, 'test2');
000276    }
000277  } {0 {}}
000278  do_execsql_test index7-3.4 {
000279    SELECT count(*) FROM t3 WHERE a=999;
000280  } {162}
000281  integrity_check index7-3.5
000282  
000283  do_execsql_test index7-4.0 {
000284    VACUUM;
000285    PRAGMA integrity_check;
000286  } {ok}
000287  
000288  # Silently ignore database name qualifiers in partial indices.
000289  #
000290  do_execsql_test index7-5.0 {
000291    CREATE INDEX t3b ON t3(b) WHERE xyzzy.t3.b BETWEEN 5 AND 10;
000292                                 /* ^^^^^-- ignored */
000293    ANALYZE;
000294    SELECT count(*) FROM t3 WHERE t3.b BETWEEN 5 AND 10;
000295    SELECT stat+0 FROM sqlite_stat1 WHERE idx='t3b';
000296  } {6 6}
000297  
000298  # Verify that the problem identified by ticket [98d973b8f5] has been fixed.
000299  #
000300  do_execsql_test index7-6.1 {
000301    CREATE TABLE t5(a, b);
000302    CREATE TABLE t4(c, d);
000303    INSERT INTO t5 VALUES(1, 'xyz');
000304    INSERT INTO t4 VALUES('abc', 'not xyz');
000305    SELECT * FROM (SELECT * FROM t5 WHERE a=1 AND b='xyz'), t4 WHERE c='abc';
000306  } {
000307    1 xyz abc {not xyz}
000308  }
000309  do_execsql_test index7-6.2 {
000310    CREATE INDEX i4 ON t4(c) WHERE d='xyz';
000311    SELECT * FROM (SELECT * FROM t5 WHERE a=1 AND b='xyz'), t4 WHERE c='abc';
000312  } {
000313    1 xyz abc {not xyz}
000314  }
000315  do_execsql_test index7-6.3 {
000316    CREATE VIEW v4 AS SELECT * FROM t4;
000317    INSERT INTO t4 VALUES('def', 'xyz');
000318    SELECT * FROM v4 WHERE d='xyz' AND c='def'
000319  } {
000320    def xyz
000321  }
000322  do_eqp_test index7-6.4 {
000323    SELECT * FROM v4 WHERE d='xyz' AND c='def'
000324  } {SEARCH TABLE t4 USING INDEX i4 (c=?)}
000325  
000326  do_catchsql_test index7-6.5 {
000327    CREATE INDEX t5a ON t5(a) WHERE a=#1;
000328  } {1 {near "#1": syntax error}}
000329  
000330  
000331  finish_test