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SQLite training in Houston TX on 2019-11-05 (details)
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Overview
Comment:Add a test case to verify that "PRAGMA data_version" works as expected when an OTA client writes to the database.
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SHA1: 6441f2dc9e7f53de64bc15b1d766c885b2635112
User & Date: dan 2015-07-07 19:07:30
Context
2015-07-07
19:35
Merge the Fts5MultiSegIter and Fts5IndexIter objects. check-in: 6ace7354 user: dan tags: trunk
19:07
Add a test case to verify that "PRAGMA data_version" works as expected when an OTA client writes to the database. check-in: 6441f2dc user: dan tags: trunk
08:29
Further optimizations for fts5 b-tree seeks. check-in: f3789968 user: dan tags: trunk
Changes
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Changes to ext/ota/ota12.test.

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  do_test 2.$tn.11 {
    sqlite3ota ota test.db ota.db
    while {[ota step]=="SQLITE_OK"} {}
    ota close
  } {SQLITE_DONE}

}
































































finish_test










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  do_test 2.$tn.11 {
    sqlite3ota ota test.db ota.db
    while {[ota step]=="SQLITE_OK"} {}
    ota close
  } {SQLITE_DONE}

}

#-------------------------------------------------------------------------
# Test that "PRAGMA data_version" works when an OTA client writes the
# database.
#
do_multiclient_test tn {

  # Initialize a target (test.db) and ota (ota.db) database.
  #
  forcedelete ota.db
  sql1 $setup_sql

  # Check the initial database contains table "xx" with a single row.
  # Also save the current values of "PRAGMA data-version" for [db1] 
  # and [db2].
  #
  do_test 2.$tn.1 {
    list [sql1 { SELECT count(*) FROM xx }] [sql2 { SELECT count(*) FROM xx }]
  } {1 1}
  set V1 [sql1 {PRAGMA data_version}] 
  set V2 [sql2 {PRAGMA data_version}]

  # Check the values of data-version have not magically changed.
  #
  do_test 2.$tn.2 {
    list [sql1 {PRAGMA data_version}] [sql2 {PRAGMA data_version}]
  } [list $V1 $V2]

  # Start stepping the OTA. From the point of view of [db1] and [db2], the 
  # data-version values remain unchanged until the database contents are
  # modified. At which point the values are incremented.
  #
  sqlite3ota ota test.db ota.db
  set x 0
  while {[db one {SELECT count(*) FROM xx}]==1} {
    do_test 2.$tn.3.[incr x] {
      list [sql1 {PRAGMA data_version}] [sql2 {PRAGMA data_version}]
    } [list $V1 $V2]
    ota step
  }
  do_test 2.$tn.5.1 { expr {$V1 < [sql1 {PRAGMA data_version}]} } 1
  do_test 2.$tn.5.2 { expr {$V2 < [sql2 {PRAGMA data_version}]} } 1

  # Check the db contents is as expected.
  #
  do_test 2.$tn.4 {
    list [sql1 {SELECT count(*) FROM xx}] [sql2 {SELECT count(*) FROM xx}]
  } {3 3}

  set V1 [sql1 {PRAGMA data_version}] 
  set V2 [sql2 {PRAGMA data_version}]

  # Finish applying the OTA (i.e. do the incremental checkpoint). Check that
  # this does not cause the data-version values to change.
  #
  while {[ota step]=="SQLITE_OK"} { }
  ota close

  do_test 2.$tn.6 {
    list [sql1 {PRAGMA data_version}] [sql2 {PRAGMA data_version}]
  } [list $V1 $V2]

}

finish_test