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SQLite training in Houston TX on 2019-11-05 (details)
Part of the 2019 Tcl Conference

Artifact 719c35cbbcc04dde8e5a54a6f69851a0af9ed1f2:


# 2011 January 27
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#*************************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this script is testing the FTS3 module.
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
ifcapable !fts3 { finish_test ; return }
set ::testprefix fts3aux1

do_execsql_test 1.1 {
  CREATE VIRTUAL TABLE t1 USING fts4;
  INSERT INTO t1 VALUES('one two three four');
  INSERT INTO t1 VALUES('three four five six');
  INSERT INTO t1 VALUES('one three five seven');

  CREATE VIRTUAL TABLE terms USING fts4aux(t1);
  SELECT term, documents, occurrences FROM terms WHERE col = '*';
} {
  five  2 2     four  2 2     one   2 2     seven 1 1 
  six   1 1     three 3 3     two   1 1
}

do_execsql_test 1.2 {
  INSERT INTO t1 VALUES('one one one three three three');
  SELECT term, documents, occurrences FROM terms WHERE col = '*';
} { 
  five  2 2     four  2 2     one   3 5     seven 1 1 
  six   1 1     three 4 6     two   1 1
}

do_execsql_test 1.3 {
  DELETE FROM t1;
  SELECT term, documents, occurrences FROM terms WHERE col = '*';
} {}

do_execsql_test 1.4 {
  INSERT INTO t1 VALUES('a b a b a b a');
  INSERT INTO t1 SELECT * FROM t1;
  INSERT INTO t1 SELECT * FROM t1;
  INSERT INTO t1 SELECT * FROM t1;
  INSERT INTO t1 SELECT * FROM t1;
  INSERT INTO t1 SELECT * FROM t1;
  INSERT INTO t1 SELECT * FROM t1;
  INSERT INTO t1 SELECT * FROM t1;
  INSERT INTO t1 SELECT * FROM t1;
  SELECT term, documents, occurrences FROM terms WHERE col = '*';
} {a 256 1024    b 256 768}

#-------------------------------------------------------------------------
# The following tests verify that the fts4aux module uses the full-text
# index to reduce the number of rows scanned in the following circumstances:
#
#   * when there is equality comparison against the term column using the 
#     BINARY collating sequence. 
#
#   * when there is a range constraint on the term column using the BINARY 
#     collating sequence. 
#
# And also uses the full-text index to optimize ORDER BY clauses of the 
# form "ORDER BY term ASC" or equivalent.
#
# Test organization is:
#
#   fts3aux1-2.1.*: equality constraints.
#   fts3aux1-2.2.*: range constraints.
#   fts3aux1-2.3.*: ORDER BY optimization.
# 

do_execsql_test 2.0 {
  DROP TABLE t1;
  DROP TABLE terms;

  CREATE VIRTUAL TABLE x1 USING fts4(x);
  INSERT INTO x1(x1) VALUES('nodesize=24');
  CREATE VIRTUAL TABLE terms USING fts4aux(x1);

  CREATE VIEW terms_v AS 
  SELECT term, documents, occurrences FROM terms WHERE col = '*';

  INSERT INTO x1 VALUES('braes brag bragged bragger bragging');
  INSERT INTO x1 VALUES('brags braid braided braiding braids');
  INSERT INTO x1 VALUES('brain brainchild brained braining brains');
  INSERT INTO x1 VALUES('brainstem brainstems brainstorm brainstorms'); 
}

proc rec {varname x} {
  global $varname
  incr $varname
  return 1
}
db func rec rec

# Use EQP to show that the WHERE expression "term='braid'" uses a different
# index number (1) than "+term='braid'" (0).
#
do_execsql_test 2.1.1.1 {
  EXPLAIN QUERY PLAN SELECT * FROM terms WHERE term='braid'
} { 0 0 0 {SCAN TABLE terms VIRTUAL TABLE INDEX 1: (~0 rows)} }
do_execsql_test 2.1.1.2 {
  EXPLAIN QUERY PLAN SELECT * FROM terms WHERE +term='braid'
} {0 0 0 {SCAN TABLE terms VIRTUAL TABLE INDEX 0: (~0 rows)}}

# Now show that using "term='braid'" means the virtual table returns
# only 1 row to SQLite, but "+term='braid'" means all 19 are returned.
#
do_test 2.1.2.1 {
  set cnt 0
  execsql { SELECT * FROM terms_v WHERE rec('cnt', term) AND term='braid' }
  set cnt
} {2}
do_test 2.1.2.2 {
  set cnt 0
  execsql { SELECT * FROM terms_v WHERE rec('cnt', term) AND +term='braid' }
  set cnt
} {38}

# Similar to the test immediately above, but using a term ("breakfast") that 
# is not featured in the dataset.
#
do_test 2.1.3.1 {
  set cnt 0
  execsql { SELECT * FROM terms_v WHERE rec('cnt', term) AND term='breakfast' }
  set cnt
} {0}
do_test 2.1.3.2 {
  set cnt 0
  execsql { SELECT * FROM terms_v WHERE rec('cnt', term) AND +term='breakfast' }
  set cnt
} {38}

do_execsql_test 2.1.4.1 { SELECT * FROM terms_v WHERE term='braid' } {braid 1 1}
do_execsql_test 2.1.4.2 { SELECT * FROM terms_v WHERE +term='braid'} {braid 1 1}
do_execsql_test 2.1.4.3 { SELECT * FROM terms_v WHERE term='breakfast'  } {}
do_execsql_test 2.1.4.4 { SELECT * FROM terms_v WHERE +term='breakfast' } {}

do_execsql_test 2.1.4.5 { SELECT * FROM terms_v WHERE term='cba'  } {}
do_execsql_test 2.1.4.6 { SELECT * FROM terms_v WHERE +term='cba' } {}
do_execsql_test 2.1.4.7 { SELECT * FROM terms_v WHERE term='abc'  } {}
do_execsql_test 2.1.4.8 { SELECT * FROM terms_v WHERE +term='abc' } {}

# Special case: term=NULL
#
do_execsql_test 2.1.5 { SELECT * FROM terms WHERE term=NULL } {}

do_execsql_test 2.2.1.1 {
  EXPLAIN QUERY PLAN SELECT * FROM terms WHERE term>'brain'
} { 0 0 0 {SCAN TABLE terms VIRTUAL TABLE INDEX 2: (~0 rows)} }
do_execsql_test 2.2.1.2 {
  EXPLAIN QUERY PLAN SELECT * FROM terms WHERE +term>'brain'
} { 0 0 0 {SCAN TABLE terms VIRTUAL TABLE INDEX 0: (~0 rows)} }

do_execsql_test 2.2.1.3 {
  EXPLAIN QUERY PLAN SELECT * FROM terms WHERE term<'brain'
} { 0 0 0 {SCAN TABLE terms VIRTUAL TABLE INDEX 4: (~0 rows)} }
do_execsql_test 2.2.1.4 {
  EXPLAIN QUERY PLAN SELECT * FROM terms WHERE +term<'brain'
} { 0 0 0 {SCAN TABLE terms VIRTUAL TABLE INDEX 0: (~0 rows)} }

do_execsql_test 2.2.1.5 {
  EXPLAIN QUERY PLAN SELECT * FROM terms WHERE term BETWEEN 'brags' AND 'brain'
} { 0 0 0 {SCAN TABLE terms VIRTUAL TABLE INDEX 6: (~0 rows)} }
do_execsql_test 2.2.1.6 {
  EXPLAIN QUERY PLAN SELECT * FROM terms WHERE +term BETWEEN 'brags' AND 'brain'
} { 0 0 0 {SCAN TABLE terms VIRTUAL TABLE INDEX 0: (~0 rows)} }

do_test 2.2.2.1 {
  set cnt 0
  execsql { SELECT * FROM terms WHERE rec('cnt', term) AND term>'brain' }
  set cnt
} {18}
do_test 2.2.2.2 {
  set cnt 0
  execsql { SELECT * FROM terms WHERE rec('cnt', term) AND +term>'brain' }
  set cnt
} {38}
do_execsql_test 2.2.2.3 {
  SELECT term, documents, occurrences FROM terms_v WHERE term>'brain'
} {
  brainchild 1 1 brained 1 1 braining 1 1 brains 1 1 
  brainstem 1 1 brainstems 1 1 brainstorm 1 1 brainstorms 1 1
}
do_execsql_test 2.2.2.4 {
  SELECT term, documents, occurrences FROM terms_v WHERE +term>'brain'
} {
  brainchild 1 1 brained 1 1 braining 1 1 brains 1 1 
  brainstem 1 1 brainstems 1 1 brainstorm 1 1 brainstorms 1 1
}
do_execsql_test 2.2.2.5 {
  SELECT term, documents, occurrences FROM terms_v WHERE term>='brain'
} {
  brain 1 1
  brainchild 1 1 brained 1 1 braining 1 1 brains 1 1 
  brainstem 1 1 brainstems 1 1 brainstorm 1 1 brainstorms 1 1
}
do_execsql_test 2.2.2.6 {
  SELECT term, documents, occurrences FROM terms_v WHERE +term>='brain'
} {
  brain 1 1
  brainchild 1 1 brained 1 1 braining 1 1 brains 1 1 
  brainstem 1 1 brainstems 1 1 brainstorm 1 1 brainstorms 1 1
}

do_execsql_test 2.2.2.7 {
  SELECT term, documents, occurrences FROM terms_v WHERE term>='abc'
} {
  braes 1 1 brag 1 1 bragged 1 1 bragger 1 1 
  bragging 1 1 brags 1 1 braid 1 1 braided 1 1 
  braiding 1 1 braids 1 1 brain 1 1 brainchild 1 1 
  brained 1 1 braining 1 1 brains 1 1 brainstem 1 1 
  brainstems 1 1 brainstorm 1 1 brainstorms 1 1
}
do_execsql_test 2.2.2.8 {
  SELECT term, documents, occurrences FROM terms_v WHERE +term>='abc'
} {
  braes 1 1 brag 1 1 bragged 1 1 bragger 1 1 
  bragging 1 1 brags 1 1 braid 1 1 braided 1 1 
  braiding 1 1 braids 1 1 brain 1 1 brainchild 1 1 
  brained 1 1 braining 1 1 brains 1 1 brainstem 1 1 
  brainstems 1 1 brainstorm 1 1 brainstorms 1 1
}

do_execsql_test 2.2.2.9 {
  SELECT term, documents, occurrences FROM terms_v WHERE term>='brainstorms'
} {brainstorms 1 1}
do_execsql_test 2.2.2.10 {
  SELECT term, documents, occurrences FROM terms_v WHERE term>='brainstorms'
} {brainstorms 1 1}
do_execsql_test 2.2.2.11 { SELECT * FROM terms_v WHERE term>'brainstorms' } {}
do_execsql_test 2.2.2.12 { SELECT * FROM terms_v WHERE term>'brainstorms' } {}

do_execsql_test 2.2.2.13 { SELECT * FROM terms_v WHERE term>'cba' } {}
do_execsql_test 2.2.2.14 { SELECT * FROM terms_v WHERE term>'cba' } {}

do_test 2.2.3.1 {
  set cnt 0
  execsql { SELECT * FROM terms WHERE rec('cnt', term) AND term<'brain' }
  set cnt
} {22}
do_test 2.2.3.2 {
  set cnt 0
  execsql { SELECT * FROM terms WHERE rec('cnt', term) AND +term<'brain' }
  set cnt
} {38}
do_execsql_test 2.2.3.3 {
  SELECT term, documents, occurrences FROM terms_v WHERE term<'brain'
} {
  braes 1 1 brag 1 1 bragged 1 1 bragger 1 1 bragging 1 1 
  brags 1 1 braid 1 1 braided 1 1 braiding 1 1 braids 1 1
}
do_execsql_test 2.2.3.4 {
  SELECT term, documents, occurrences FROM terms_v WHERE +term<'brain'
} {
  braes 1 1 brag 1 1 bragged 1 1 bragger 1 1 bragging 1 1 
  brags 1 1 braid 1 1 braided 1 1 braiding 1 1 braids 1 1
}
do_execsql_test 2.2.3.5 {
  SELECT term, documents, occurrences FROM terms_v WHERE term<='brain'
} {
  braes 1 1 brag 1 1 bragged 1 1 bragger 1 1 bragging 1 1 
  brags 1 1 braid 1 1 braided 1 1 braiding 1 1 braids 1 1
  brain 1 1
}
do_execsql_test 2.2.3.6 {
  SELECT term, documents, occurrences FROM terms_v WHERE +term<='brain'
} {
  braes 1 1 brag 1 1 bragged 1 1 bragger 1 1 bragging 1 1 
  brags 1 1 braid 1 1 braided 1 1 braiding 1 1 braids 1 1
  brain 1 1
}

do_test 2.2.4.1 {
  set cnt 0
  execsql { 
    SELECT term, documents, occurrences FROM terms 
    WHERE rec('cnt', term) AND term BETWEEN 'brags' AND 'brain' 
  }
  set cnt
} {12}
do_test 2.2.4.2 {
  set cnt 0
  execsql { 
    SELECT term, documents, occurrences FROM terms 
    WHERE rec('cnt', term) AND +term BETWEEN 'brags' AND 'brain' 
  }
  set cnt
} {38}
do_execsql_test 2.2.4.3 {
  SELECT term, documents, occurrences FROM terms_v 
  WHERE rec('cnt', term) AND term BETWEEN 'brags' AND 'brain' 
} {
  brags 1 1 braid 1 1 braided 1 1 braiding 1 1 braids 1 1 brain 1 1 
}
do_execsql_test 2.2.4.4 {
  SELECT term, documents, occurrences FROM terms_v 
  WHERE rec('cnt', term) AND +term BETWEEN 'brags' AND 'brain' 
} {
  brags 1 1 braid 1 1 braided 1 1 braiding 1 1 braids 1 1 brain 1 1 
}
do_execsql_test 2.2.4.5 {
  SELECT term, documents, occurrences FROM terms_v 
  WHERE rec('cnt', term) AND term > 'brags' AND term < 'brain' 
} {
  braid 1 1 braided 1 1 braiding 1 1 braids 1 1
}
do_execsql_test 2.2.4.6 {
  SELECT term, documents, occurrences FROM terms_v 
  WHERE rec('cnt', term) AND +term > 'brags' AND +term < 'brain' 
} {
  braid 1 1 braided 1 1 braiding 1 1 braids 1 1
}

# Check that "ORDER BY term ASC" and equivalents are sorted by the
# virtual table implementation. Any other ORDER BY clause requires
# SQLite to sort results using a temporary b-tree.
#
foreach {tn sort orderby} {
  1    0    "ORDER BY term ASC"
  2    0    "ORDER BY term"
  3    1    "ORDER BY term DESC"
  4    1    "ORDER BY documents ASC"
  5    1    "ORDER BY documents"
  6    1    "ORDER BY documents DESC"
  7    1    "ORDER BY occurrences ASC"
  8    1    "ORDER BY occurrences"
  9    1    "ORDER BY occurrences DESC"
} {

  set res [list 0 0 0 {SCAN TABLE terms VIRTUAL TABLE INDEX 0: (~0 rows)}]
  if {$sort} { lappend res 0 0 0 {USE TEMP B-TREE FOR ORDER BY} }

  set sql "SELECT * FROM terms $orderby"
  do_execsql_test 2.3.1.$tn "EXPLAIN QUERY PLAN $sql" $res
}

#-------------------------------------------------------------------------
# The next set of tests, fts3aux1-3.*, test error conditions in the 
# fts4aux module. Except, fault injection testing (OOM, IO error etc.) is 
# done in fts3fault2.test
#

do_execsql_test 3.1.1 {
  CREATE VIRTUAL TABLE t2 USING fts4;
}

do_catchsql_test 3.1.2 {
  CREATE VIRTUAL TABLE terms2 USING fts4aux;
} {1 {wrong number of arguments to fts4aux constructor}}
do_catchsql_test 3.1.3 {
  CREATE VIRTUAL TABLE terms2 USING fts4aux(t2, t2);
} {1 {wrong number of arguments to fts4aux constructor}}

do_execsql_test 3.2.1 {
  CREATE VIRTUAL TABLE terms3 USING fts4aux(does_not_exist)
}
do_catchsql_test 3.2.2 {
  SELECT * FROM terms3
} {1 {SQL logic error or missing database}}
do_catchsql_test 3.2.3 {
  SELECT * FROM terms3 WHERE term = 'abc'
} {1 {SQL logic error or missing database}}

do_catchsql_test 3.3.1 {
  INSERT INTO terms VALUES(1,2,3);
} {1 {table terms may not be modified}}
do_catchsql_test 3.3.2 {
  DELETE FROM terms
} {1 {table terms may not be modified}}
do_catchsql_test 3.3.3 {
  UPDATE terms set documents = documents+1;
} {1 {table terms may not be modified}}


#-------------------------------------------------------------------------
# The following tests - fts4aux-4.* - test that joins work with fts4aux
# tables. And that fts4aux provides reasonably sane cost information via
# xBestIndex to the query planner.
#
db close
forcedelete test.db
sqlite3 db test.db
do_execsql_test 4.1 {
  CREATE VIRTUAL TABLE x1 USING fts4(x);
  CREATE VIRTUAL TABLE terms USING fts4aux(x1);
  CREATE TABLE x2(y);
  CREATE TABLE x3(y);
  CREATE INDEX i1 ON x3(y);

  INSERT INTO x1 VALUES('a b c d e');
  INSERT INTO x1 VALUES('f g h i j');
  INSERT INTO x1 VALUES('k k l l a');

  INSERT INTO x2 SELECT term FROM terms WHERE col = '*';
  INSERT INTO x3 SELECT term FROM terms WHERE col = '*';
}

proc do_plansql_test {tn sql r} {
  uplevel do_execsql_test $tn [list "EXPLAIN QUERY PLAN $sql ; $sql"] [list $r]
}

do_plansql_test 4.2 {
  SELECT y FROM x2, terms WHERE y = term AND col = '*'
} {
  0 0 0 {SCAN TABLE x2 (~1000000 rows)} 
  0 1 1 {SCAN TABLE terms VIRTUAL TABLE INDEX 1: (~0 rows)} 
  a b c d e f g h i j k l
}

do_plansql_test 4.3 {
  SELECT y FROM terms, x2 WHERE y = term AND col = '*'
} {
  0 0 1 {SCAN TABLE x2 (~1000000 rows)} 
  0 1 0 {SCAN TABLE terms VIRTUAL TABLE INDEX 1: (~0 rows)} 
  a b c d e f g h i j k l
}

do_plansql_test 4.4 {
  SELECT y FROM x3, terms WHERE y = term AND col = '*'
} {
  0 0 1 {SCAN TABLE terms VIRTUAL TABLE INDEX 0: (~0 rows)} 
  0 1 0 {SEARCH TABLE x3 USING COVERING INDEX i1 (y=?) (~10 rows)}
  a b c d e f g h i j k l
}

do_plansql_test 4.5 {
  SELECT y FROM terms, x3 WHERE y = term AND occurrences>1 AND col = '*'
} {
  0 0 0 {SCAN TABLE terms VIRTUAL TABLE INDEX 0: (~0 rows)} 
  0 1 1 {SEARCH TABLE x3 USING COVERING INDEX i1 (y=?) (~10 rows)}
  a k l
}

#-------------------------------------------------------------------------
# The following tests check that fts4aux can handle an fts table with an
# odd name (one that requires quoting for use in SQL statements). And that
# the argument to the fts4aux constructor is properly dequoted before use.
#
#
do_execsql_test 5.1 {
  CREATE VIRTUAL TABLE "abc '!' def" USING fts4(x, y);
  INSERT INTO "abc '!' def" VALUES('XX', 'YY');

  CREATE VIRTUAL TABLE terms3 USING fts4aux("abc '!' def");
  SELECT * FROM terms3;
} {xx * 1 1 xx 0 1 1 yy * 1 1 yy 1 1 1}

do_execsql_test 5.2 {
  CREATE VIRTUAL TABLE "%%^^%%" USING fts4aux('abc ''!'' def');
  SELECT * FROM "%%^^%%";
} {xx * 1 1 xx 0 1 1 yy * 1 1 yy 1 1 1}


finish_test