test/index.test

# 2001 September 15
#
# 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 file is testing the CREATE INDEX statement.
#
# $Id: index.test,v 1.18 2002/07/13 03:11:54 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl

# Create a basic index and verify it is added to sqlite_master
#
do_test index-1.1 {
  execsql {CREATE TABLE test1(f1 int, f2 int, f3 int)}
  execsql {CREATE INDEX index1 ON test1(f1)}
  execsql {SELECT name FROM sqlite_master WHERE type!='meta' ORDER BY name}
} {index1 test1}
do_test index-1.1b {
  execsql {SELECT name, sql, tbl_name, type FROM sqlite_master 
           WHERE name='index1'}
} {index1 {CREATE INDEX index1 ON test1(f1)} test1 index}
do_test index-1.1c {
  db close
  sqlite db test.db
  execsql {SELECT name, sql, tbl_name, type FROM sqlite_master 
           WHERE name='index1'}
} {index1 {CREATE INDEX index1 ON test1(f1)} test1 index}
do_test index-1.1d {
  db close
  sqlite db test.db
  execsql {SELECT name FROM sqlite_master WHERE type!='meta' ORDER BY name}
} {index1 test1}

# Verify that the index dies with the table
#
do_test index-1.2 {
  execsql {DROP TABLE test1}
  execsql {SELECT name FROM sqlite_master WHERE type!='meta' ORDER BY name}
} {}

# Try adding an index to a table that does not exist
#
do_test index-2.1 {
  set v [catch {execsql {CREATE INDEX index1 ON test1(f1)}} msg]
  lappend v $msg
} {1 {no such table: test1}}

# Try adding an index on a column of a table where the table
# exists but the column does not.
#
do_test index-2.1 {
  execsql {CREATE TABLE test1(f1 int, f2 int, f3 int)}
  set v [catch {execsql {CREATE INDEX index1 ON test1(f4)}} msg]
  lappend v $msg
} {1 {table test1 has no column named f4}}

# Try an index with some columns that match and others that do now.
#
do_test index-2.2 {
  set v [catch {execsql {CREATE INDEX index1 ON test1(f1, f2, f4, f3)}} msg]
  execsql {DROP TABLE test1}
  lappend v $msg
} {1 {table test1 has no column named f4}}

# Try creating a bunch of indices on the same table
#
set r {}
for {set i 1} {$i<100} {incr i} {
  lappend r index$i
}
do_test index-3.1 {
  execsql {CREATE TABLE test1(f1 int, f2 int, f3 int, f4 int, f5 int)}
  for {set i 1} {$i<100} {incr i} {
    set sql "CREATE INDEX index$i ON test1(f[expr {($i%5)+1}])"
    execsql $sql
  }
  execsql {SELECT name FROM sqlite_master 
           WHERE type='index' AND tbl_name='test1'
           ORDER BY name}
} $r


# Verify that all the indices go away when we drop the table.
#
do_test index-3.3 {
  execsql {DROP TABLE test1}
  execsql {SELECT name FROM sqlite_master 
           WHERE type='index' AND tbl_name='test1'
           ORDER BY name}
} {}

# Create a table and insert values into that table.  Then create
# an index on that table.  Verify that we can select values
# from the table correctly using the index.
#
# Note that the index names "index9" and "indext" are chosen because
# they both have the same hash.
#
do_test index-4.1 {
  execsql {CREATE TABLE test1(cnt int, power int)}
  for {set i 1} {$i<20} {incr i} {
    execsql "INSERT INTO test1 VALUES($i,[expr {int(pow(2,$i))}])"
  }
  execsql {CREATE INDEX index9 ON test1(cnt)}
  execsql {CREATE INDEX indext ON test1(power)}
  execsql {SELECT name FROM sqlite_master WHERE type!='meta' ORDER BY name}
} {index9 indext test1}
do_test index-4.2 {
  execsql {SELECT cnt FROM test1 WHERE power=4}
} {2}
do_test index-4.3 {
  execsql {SELECT cnt FROM test1 WHERE power=1024}
} {10}
do_test index-4.4 {
  execsql {SELECT power FROM test1 WHERE cnt=6}
} {64}
do_test index-4.5 {
  execsql {DROP INDEX indext}
  execsql {SELECT power FROM test1 WHERE cnt=6}
} {64}
do_test index-4.6 {
  execsql {SELECT cnt FROM test1 WHERE power=1024}
} {10}
do_test index-4.7 {
  execsql {CREATE INDEX indext ON test1(cnt)}
  execsql {SELECT power FROM test1 WHERE cnt=6}
} {64}
do_test index-4.8 {
  execsql {SELECT cnt FROM test1 WHERE power=1024}
} {10}
do_test index-4.9 {
  execsql {DROP INDEX index9}
  execsql {SELECT power FROM test1 WHERE cnt=6}
} {64}
do_test index-4.10 {
  execsql {SELECT cnt FROM test1 WHERE power=1024}
} {10}
do_test index-4.11 {
  execsql {DROP INDEX indext}
  execsql {SELECT power FROM test1 WHERE cnt=6}
} {64}
do_test index-4.12 {
  execsql {SELECT cnt FROM test1 WHERE power=1024}
} {10}
do_test index-4.13 {
  execsql {DROP TABLE test1}
  execsql {SELECT name FROM sqlite_master WHERE type!='meta' ORDER BY name}
} {}

# Do not allow indices to be added to sqlite_master
#
do_test index-5.1 {
  set v [catch {execsql {CREATE INDEX index1 ON sqlite_master(name)}} msg]
  lappend v $msg
} {1 {table sqlite_master may not have new indices added}}
do_test index-5.2 {
  execsql {SELECT name FROM sqlite_master WHERE type!='meta'}
} {}

# Do not allow indices with duplicate names to be added
#
do_test index-6.1 {
  execsql {CREATE TABLE test1(f1 int, f2 int)}
  execsql {CREATE TABLE test2(g1 real, g2 real)}
  execsql {CREATE INDEX index1 ON test1(f1)}
  set v [catch {execsql {CREATE INDEX index1 ON test2(g1)}} msg]
  lappend v $msg
} {1 {index index1 already exists}}
do_test index-6.1b {
  execsql {SELECT name FROM sqlite_master WHERE type!='meta' ORDER BY name}
} {index1 test1 test2}
do_test index-6.2 {
  set v [catch {execsql {CREATE INDEX test1 ON test2(g1)}} msg]
  lappend v $msg
} {1 {there is already a table named test1}}
do_test index-6.2b {
  execsql {SELECT name FROM sqlite_master WHERE type!='meta' ORDER BY name}
} {index1 test1 test2}
do_test index-6.3 {
  execsql {DROP TABLE test1}
  execsql {DROP TABLE test2}
  execsql {SELECT name FROM sqlite_master WHERE type!='meta' ORDER BY name}
} {}
do_test index-6.4 {
  execsql {
    CREATE TABLE test1(a,b);
    CREATE INDEX index1 ON test1(a);
    CREATE INDEX index2 ON test1(b);
    CREATE INDEX index3 ON test1(a,b);
    DROP TABLE test1;
    SELECT name FROM sqlite_master WHERE type!='meta' ORDER BY name;
  }
} {}

# Create a primary key
#
do_test index-7.1 {
  execsql {CREATE TABLE test1(f1 int, f2 int primary key)}
  for {set i 1} {$i<20} {incr i} {
    execsql "INSERT INTO test1 VALUES($i,[expr {int(pow(2,$i))}])"
  }
  execsql {SELECT count(*) FROM test1}
} {19}
do_test index-7.2 {
  execsql {SELECT f1 FROM test1 WHERE f2=65536}
} {16}
do_test index-7.3 {
  execsql {
    SELECT name FROM sqlite_master 
    WHERE type='index' AND tbl_name='test1'
  }
} {{(test1 autoindex 1)}}
do_test index-7.4 {
  execsql {DROP table test1}
  execsql {SELECT name FROM sqlite_master WHERE type!='meta'}
} {}

# Make sure we cannot drop a non-existant index.
#
do_test index-8.1 {
  set v [catch {execsql {DROP INDEX index1}} msg]
  lappend v $msg
} {1 {no such index: index1}}

# Make sure we don't actually create an index when the EXPLAIN keyword
# is used.
#
do_test index-9.1 {
  execsql {CREATE TABLE tab1(a int)}
  execsql {EXPLAIN CREATE INDEX idx1 ON tab1(a)}
  execsql {SELECT name FROM sqlite_master WHERE tbl_name='tab1'}
} {tab1}
do_test index-9.2 {
  execsql {CREATE INDEX idx1 ON tab1(a)}
  execsql {SELECT name FROM sqlite_master WHERE tbl_name='tab1' ORDER BY name}
} {idx1 tab1}

# Allow more than one entry with the same key.
#
do_test index-10.0 {
  execsql {
    CREATE TABLE t1(a int, b int);
    CREATE INDEX i1 ON t1(a);
    INSERT INTO t1 VALUES(1,2);
    INSERT INTO t1 VALUES(2,4);
    INSERT INTO t1 VALUES(3,8);
    INSERT INTO t1 VALUES(1,12);
    SELECT b FROM t1 WHERE a=1 ORDER BY b;
  }
} {2 12}
do_test index-10.1 {
  execsql {
    SELECT b FROM t1 WHERE a=2 ORDER BY b;
  }
} {4}
do_test index-10.2 {
  execsql {
    DELETE FROM t1 WHERE b=12;
    SELECT b FROM t1 WHERE a=1 ORDER BY b;
  }
} {2}
do_test index-10.3 {
  execsql {
    DELETE FROM t1 WHERE b=2;
    SELECT b FROM t1 WHERE a=1 ORDER BY b;
  }
} {}
do_test index-10.4 {
  execsql {
    DELETE FROM t1;
    INSERT INTO t1 VALUES (1,1);
    INSERT INTO t1 VALUES (1,2);
    INSERT INTO t1 VALUES (1,3);
    INSERT INTO t1 VALUES (1,4);
    INSERT INTO t1 VALUES (1,5);
    INSERT INTO t1 VALUES (1,6);
    INSERT INTO t1 VALUES (1,7);
    INSERT INTO t1 VALUES (1,8);
    INSERT INTO t1 VALUES (1,9);
    INSERT INTO t1 VALUES (2,0);
    SELECT b FROM t1 WHERE a=1 ORDER BY b;
  }
} {1 2 3 4 5 6 7 8 9}
do_test index-10.5 {
  execsql {
    DELETE FROM t1 WHERE b IN (2, 4, 6, 8);
    SELECT b FROM t1 WHERE a=1 ORDER BY b;
  }
} {1 3 5 7 9}
do_test index-10.6 {
  execsql {
    DELETE FROM t1 WHERE b>2;
    SELECT b FROM t1 WHERE a=1 ORDER BY b;
  }
} {1}
do_test index-10.7 {
  execsql {
    DELETE FROM t1 WHERE b=1;
    SELECT b FROM t1 WHERE a=1 ORDER BY b;
  }
} {}
do_test index-10.8 {
  execsql {
    SELECT b FROM t1 ORDER BY b;
  }
} {0}

# Automatically create an index when we specify a primary key.
#
do_test index-11.1 {
  execsql {
    CREATE TABLE t3(
      a text,
      b int,
      c float,
      PRIMARY KEY(b)
    );
  }
  for {set i 1} {$i<=50} {incr i} {
    execsql "INSERT INTO t3 VALUES('x${i}x',$i,0.$i)"
  }
  set sqlite_search_count 0
  concat [execsql {SELECT c FROM t3 WHERE b==10}] $sqlite_search_count
} {0.10 3}

# Numeric strings should compare as if they were numbers.  So even if the
# strings are not character-by-character the same, if they represent the
# same number they should compare equal to one another.  Verify that this
# is true in indices.
#
do_test index-12.1 {
  execsql {
    CREATE TABLE t4(a,b);
    INSERT INTO t4 VALUES('0.0',1);
    INSERT INTO t4 VALUES('0.00',2);
    INSERT INTO t4 VALUES('abc',3);
    INSERT INTO t4 VALUES('-1.0',4);
    INSERT INTO t4 VALUES('+1.0',5);
    INSERT INTO t4 VALUES('0',6);
    INSERT INTO t4 VALUES('00000',7);
    SELECT a FROM t4 ORDER BY b;
  }
} {0.0 0.00 abc -1.0 +1.0 0 00000}
do_test index-12.2 {
  execsql {
    SELECT a FROM t4 WHERE a==0 ORDER BY b
  }
} {0.0 0.00 0 00000}
do_test index-12.3 {
  execsql {
    SELECT a FROM t4 WHERE a<0.5 ORDER BY b
  }
} {0.0 0.00 -1.0 0 00000}
do_test index-12.4 {
  execsql {
    SELECT a FROM t4 WHERE a>-0.5 ORDER BY b
  }
} {0.0 0.00 abc +1.0 0 00000}
do_test index-12.5 {
  execsql {
    CREATE INDEX t4i1 ON t4(a);
    SELECT a FROM t4 WHERE a==0 ORDER BY b
  }
} {0.0 0.00 0 00000}
do_test index-12.6 {
  execsql {
    SELECT a FROM t4 WHERE a<0.5 ORDER BY b
  }
} {0.0 0.00 -1.0 0 00000}
do_test index-12.7 {
  execsql {
    SELECT a FROM t4 WHERE a>-0.5 ORDER BY b
  }
} {0.0 0.00 abc +1.0 0 00000}

# Make sure we cannot drop an automatically created index.
#
do_test index-13.1 {
  execsql {
   CREATE TABLE t5(
      a int UNIQUE,
      b float PRIMARY KEY,
      c varchar(10),
      UNIQUE(a,c)
   );
   INSERT INTO t5 VALUES(1,2,3);
   SELECT * FROM t5;
  }
} {1 2 3}
do_test index-13.2 {
  set ::idxlist [execsql {
    SELECT name FROM sqlite_master WHERE type="index" AND tbl_name="t5";
  }]
  llength $::idxlist
} {3}
for {set i 0} {$i<[llength $::idxlist]} {incr i} {
  do_test index-13.3.$i {
    catchsql "
      DROP INDEX '[lindex $::idxlist $i]';
    "
  } {1 {index associated with UNIQUE or PRIMARY KEY constraint cannot be dropped}}
}
do_test index-13.4 {
  execsql {
    INSERT INTO t5 VALUES('a','b','c');
    SELECT * FROM t5;
  }
} {1 2 3 a b c}

finish_test