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

Artifact 212d810e02a51c0ff9784a19d55e35d23382005d:


# 2002 March 6
#
# 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 PRAGMA command.
#
# $Id: pragma.test,v 1.15 2004/06/26 19:35:30 drh Exp $

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

# Test organization:
#
# pragma-1.*: Test cache_size, default_cache_size and synchronous on main db.
# pragma-2.*: Test synchronous on attached db.
# pragma-3.*: Test detection of table/index inconsistency by integrity_check.
# pragma-4.*: Test cache_size and default_cache_size on attached db.
# pragma-5.*: Test that pragma synchronous may not be used inside of a
#             transaction.
#

# Delete the preexisting database to avoid the special setup
# that the "all.test" script does.
#
db close
file delete test.db
set DB [sqlite3 db test.db]

do_test pragma-1.1 {
  execsql {
    PRAGMA cache_size;
    PRAGMA default_cache_size;
    PRAGMA synchronous;
  }
} {2000 2000 2}
do_test pragma-1.2 {
  execsql {
    PRAGMA cache_size=1234;
    PRAGMA cache_size;
    PRAGMA default_cache_size;
    PRAGMA synchronous;
  }
} {1234 2000 2}
do_test pragma-1.3 {
  db close
  sqlite3 db test.db
  execsql {
    PRAGMA cache_size;
    PRAGMA default_cache_size;
    PRAGMA synchronous;
  }
} {2000 2000 2}
do_test pragma-1.4 {
  execsql {
    PRAGMA synchronous=OFF;
    PRAGMA cache_size;
    PRAGMA default_cache_size;
    PRAGMA synchronous;
  }
} {2000 2000 0}
do_test pragma-1.5 {
  execsql {
    PRAGMA cache_size=4321;
    PRAGMA cache_size;
    PRAGMA default_cache_size;
    PRAGMA synchronous;
  }
} {4321 2000 0}
do_test pragma-1.6 {
  execsql {
    PRAGMA synchronous=ON;
    PRAGMA cache_size;
    PRAGMA default_cache_size;
    PRAGMA synchronous;
  }
} {4321 2000 1}
do_test pragma-1.7 {
  db close
  sqlite3 db test.db
  execsql {
    PRAGMA cache_size;
    PRAGMA default_cache_size;
    PRAGMA synchronous;
  }
} {2000 2000 2}
do_test pragma-1.8 {
  execsql {
    PRAGMA default_cache_size=123;
    PRAGMA cache_size;
    PRAGMA default_cache_size;
    PRAGMA synchronous;
  }
} {123 123 2}
do_test pragma-1.9 {
  db close
  set ::DB [sqlite3 db test.db]
  execsql {
    PRAGMA cache_size;
    PRAGMA default_cache_size;
    PRAGMA synchronous;
  }
} {123 123 2}
do_test pragma-1.10 {
  execsql {
    PRAGMA synchronous=NORMAL;
    PRAGMA cache_size;
    PRAGMA default_cache_size;
    PRAGMA synchronous;
  }
} {123 123 1}
do_test pragma-1.11 {
  execsql {
    PRAGMA synchronous=FULL;
    PRAGMA cache_size;
    PRAGMA default_cache_size;
    PRAGMA synchronous;
  }
} {123 123 2}
do_test pragma-1.12 {
  db close
  set ::DB [sqlite3 db test.db]
  execsql {
    PRAGMA cache_size;
    PRAGMA default_cache_size;
    PRAGMA synchronous;
  }
} {123 123 2}

# Make sure the pragma handler understands numeric values in addition
# to keywords like "off" and "full".
#
do_test pragma-1.13 {
  execsql {
    PRAGMA synchronous=0;
    PRAGMA synchronous;
  }
} {0}
do_test pragma-1.14 {
  execsql {
    PRAGMA synchronous=2;
    PRAGMA synchronous;
  }
} {2}

# Test turning "flag" pragmas on and off.
#
do_test pragma-1.15 {
  execsql {
    PRAGMA vdbe_listing=YES;
    PRAGMA vdbe_listing;
  }
} {1}
do_test pragma-1.16 {
  execsql {
    PRAGMA vdbe_listing=NO;
    PRAGMA vdbe_listing;
  }
} {0}
do_test pragma-1.17 {
  execsql {
    PRAGMA parser_trace=ON;
    PRAGMA parser_trace=OFF;
  }
} {}
do_test pragma-1.18 {
  execsql {
    PRAGMA bogus = -1234;  -- Parsing of negative values
  }
} {}

# Test modifying the safety_level of an attached database.
do_test pragma-2.1 {
  file delete -force test2.db
  file delete -force test2.db-journal
  execsql {
    ATTACH 'test2.db' AS aux;
  } 
} {}
do_test pragma-2.2 {
  execsql {
    pragma aux.synchronous;
  } 
} {2}
do_test pragma-2.3 {
  execsql {
    pragma aux.synchronous = OFF;
    pragma aux.synchronous;
    pragma synchronous;
  } 
} {0 2}
do_test pragma-2.4 {
  execsql {
    pragma aux.synchronous = ON;
    pragma synchronous;
    pragma aux.synchronous;
  } 
} {2 1}

# Construct a corrupted index and make sure the integrity_check
# pragma finds it.
#
if {![sqlite3 -has-codec]} {
do_test pragma-3.1 {
  execsql {
    BEGIN;
    CREATE TABLE t2(a,b,c);
    CREATE INDEX i2 ON t2(a);
    INSERT INTO t2 VALUES(11,2,3);
    INSERT INTO t2 VALUES(22,3,4);
    COMMIT;
    SELECT rowid, * from t2;
  }
} {1 11 2 3 2 22 3 4}
do_test pragma-3.2 {
  set rootpage [execsql {SELECT rootpage FROM sqlite_master WHERE name='i2'}]
  set db [btree_open test.db 100 0]
  btree_begin_transaction $db
  set c [btree_cursor $db $rootpage 1]
  btree_first $c
  btree_delete $c
  btree_commit $db
  btree_close $db
  execsql {PRAGMA integrity_check}
} {{rowid 1 missing from index i2} {wrong # of entries in index i2}}
}; # endif has-codec

do_test pragma-3.3 {
  execsql {
    DROP INDEX i2;
  } 
} {}

# Test modifying the cache_size of an attached database.
do_test pragma-4.1 {
  execsql {
    pragma aux.cache_size;
    pragma aux.default_cache_size;
  } 
} {2000 2000}
do_test pragma-4.2 {
  execsql {
    pragma aux.cache_size = 50;
    pragma aux.cache_size;
    pragma aux.default_cache_size;
  } 
} {50 2000}
do_test pragma-4.3 {
  execsql {
    pragma aux.default_cache_size = 456;
    pragma aux.cache_size;
    pragma aux.default_cache_size;
  } 
} {456 456}
do_test pragma-4.4 {
  execsql {
    pragma cache_size;
    pragma default_cache_size;
  } 
} {123 123}
do_test pragma-4.5 {
  execsql {
    DETACH aux;
    ATTACH 'test3.db' AS aux;
    pragma aux.cache_size;
    pragma aux.default_cache_size;
  } 
} {2000 2000}
do_test pragma-4.6 {
  execsql {
    DETACH aux;
    ATTACH 'test2.db' AS aux;
    pragma aux.cache_size;
    pragma aux.default_cache_size;
  } 
} {456 456}

# Test that modifying the sync-level in the middle of a transaction is
# disallowed.
do_test pragma-5.0 {
  execsql {
    pragma synchronous;
  } 
} {2}
do_test pragma-5.1 {
  catchsql {
    BEGIN;
    pragma synchronous = OFF;
  } 
} {1 {Safety level may not be changed inside a transaction}}
do_test pragma-5.2 {
  execsql {
    pragma synchronous;
  } 
} {2}
catchsql {COMMIT;}

# Test schema-query pragmas
#
do_test pragma-6.1 {
  foreach {idx name file} [execsql {pragma database_list}] {
    lappend res $idx $name
  }
  set res
} {0 main 1 temp 2 aux}
do_test pragma-6.2 {
  execsql {
    pragma table_info(t2)
  }
} {0 a numeric 0 {} 0 1 b numeric 0 {} 0 2 c numeric 0 {} 0}
do_test pragma-6.3 {
  execsql {
    CREATE TABLE t3(a int references t2(b), b UNIQUE);
    pragma foreign_key_list(t3);
  }
} {0 0 t2 a b}
do_test pragma-6.4 {
  execsql {
    pragma index_list(t3);
  }
} {0 sqlite_autoindex_t3_1 1}
do_test pragma-6.5 {
  execsql {
    CREATE INDEX t3i1 ON t3(a,b);
    pragma index_info(t3i1);
  }
} {0 0 a 1 1 b}

# Miscellaneous tests
#
do_test pragma-7.1 {
  # Make sure a pragma knows to read the schema if it needs to
  db close
  sqlite3 db test.db
  execsql {
    pragma index_list(t3);
  }
} {0 t3i1 0 1 sqlite_autoindex_t3_1 1}
do_test pragma-7.2 {
  db close
  sqlite3 db test.db
  catchsql {
    pragma encoding=bogus;
  }
} {1 {unsupported encoding: bogus}}
do_test pragma-7.3 {
  db close
  sqlite3 db test.db
  execsql {
    pragma lock_status;
  }
} {main unlocked temp closed}



finish_test