SQLite

# 2009 August 06
#
# 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. This file 
# implements tests for the extra functionality provided by the ANALYZE 
# command when the library is compiled with SQLITE_ENABLE_STAT2 defined.
#

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

ifcapable !stat2 {
  finish_test
  return

#
# analyze2-5.*: Check that collation sequences are used as described above
#               even when the only available version of the collation 
#               function require UTF-16 encoded arguments.
#
# analyze2-6.*: Check that the library behaves correctly when one of the
#               sqlite_stat2 or sqlite_stat1 tables are missing.
#
# analyze2-7.*: Check that in a shared-schema situation, nothing goes
#               wrong if sqlite_stat2 data is read by one connection,
#               and freed by another.
# 

proc eqp {sql {db db}} {
  uplevel execsql [list "EXPLAIN QUERY PLAN $sql"] $db
}

do_test analyze2-1.1 {
  execsql { CREATE TABLE t1(x PRIMARY KEY) }
  for {set i 0} {$i < 1000} {incr i} {
    execsql { INSERT INTO t1 VALUES($i) }
  }

  sqlite3 db test.db
  execsql ANALYZE
  eqp { SELECT * FROM t5,t6 WHERE t5.rowid=t6.rowid AND 
        t5.a>1 AND t5.a<15 AND
        t6.a>1
  }
} {0 1 {TABLE t6 WITH INDEX t6i} 1 0 {TABLE t5 USING PRIMARY KEY}}

#--------------------------------------------------------------------
# These tests, analyze2-7.*, test that the sqlite_stat2 functionality
# works in shared-cache mode. Note that these tests reuse the database
# created for the analyze2-6.* tests.
#
ifcapable shared_cache {
  db close
  set ::enable_shared_cache [sqlite3_enable_shared_cache 1]

  proc incr_schema_cookie {zDb} {
    foreach iOffset {24 40} {
      set cookie [hexio_get_int [hexio_read $zDb $iOffset 4]]
      incr cookie
      hexio_write $zDb $iOffset [hexio_render_int32 $cookie]
    }
  }

  do_test analyze2-7.1 {
    sqlite3 db1 test.db
    sqlite3 db2 test.db
    db1 cache size 0
    db2 cache size 0
    execsql { SELECT count(*) FROM t5 } db1
  } {20}
  do_test analyze2-7.2 {
    incr_schema_cookie test.db
    execsql { SELECT count(*) FROM t5 } db2
  } {20}
  do_test analyze2-7.3 {
    incr_schema_cookie test.db
    execsql { SELECT count(*) FROM t5 } db1
  } {20}
  do_test analyze2-7.4 {
    incr_schema_cookie test.db
    execsql { SELECT count(*) FROM t5 } db2
  } {20}

  do_test analyze2-7.5 {
    eqp { SELECT * FROM t5,t6 WHERE t5.rowid=t6.rowid AND 
          t5.a>1 AND t5.a<15 AND
          t6.a>1
    } db1
  } {0 1 {TABLE t6 WITH INDEX t6i} 1 0 {TABLE t5 USING PRIMARY KEY}}
  do_test analyze2-7.6 {
    incr_schema_cookie test.db
    execsql { SELECT * FROM sqlite_master } db2
    eqp { SELECT * FROM t5,t6 WHERE t5.rowid=t6.rowid AND 
          t5.a>1 AND t5.a<15 AND
          t6.a>1
    } db2
  } {0 1 {TABLE t6 WITH INDEX t6i} 1 0 {TABLE t5 USING PRIMARY KEY}}
  do_test analyze2-7.7 {
    incr_schema_cookie test.db
    execsql { SELECT * FROM sqlite_master } db1
    eqp { SELECT * FROM t5,t6 WHERE t5.rowid=t6.rowid AND 
          t5.a>1 AND t5.a<15 AND
          t6.a>1
    } db1
  } {0 1 {TABLE t6 WITH INDEX t6i} 1 0 {TABLE t5 USING PRIMARY KEY}}

  do_test analyze2-7.8 {
    execsql { DELETE FROM sqlite_stat2 } db2
    execsql { SELECT * FROM sqlite_master } db1
    eqp { SELECT * FROM t5,t6 WHERE t5.rowid=t6.rowid AND 
          t5.a>1 AND t5.a<15 AND
          t6.a>1
    } db1
  } {0 1 {TABLE t6 WITH INDEX t6i} 1 0 {TABLE t5 USING PRIMARY KEY}}
  do_test analyze2-7.9 {
    execsql { SELECT * FROM sqlite_master } db2
    eqp { SELECT * FROM t5,t6 WHERE t5.rowid=t6.rowid AND 
          t5.a>1 AND t5.a<15 AND
          t6.a>1
    } db2
  } {0 1 {TABLE t6 WITH INDEX t6i} 1 0 {TABLE t5 USING PRIMARY KEY}}

  do_test analyze2-7.10 {
    incr_schema_cookie test.db
    execsql { SELECT * FROM sqlite_master } db1
    eqp { SELECT * FROM t5,t6 WHERE t5.rowid=t6.rowid AND 
          t5.a>1 AND t5.a<15 AND
          t6.a>1
    } db1
  } {0 0 {TABLE t5 WITH INDEX t5i} 1 1 {TABLE t6 USING PRIMARY KEY}}

  db1 close
  db2 close
  sqlite3_enable_shared_cache $::enable_shared_cache
}

finish_test