autovacuum.test

sqlite-3.4.1,嵌入式数据库.是一个功能强大的开源数据库,给学习和研发以及小型公司的发展带来了全所未有的好处.

    INSERT INTO av2 VALUES('av2 a', 'av2 b', 'av2 c');

    CREATE TABLE av3(a PRIMARY KEY, b, c);
    CREATE INDEX av3_i1 ON av3(b);
    INSERT INTO av3 VALUES('av3 a', 'av3 b', 'av3 c');

    CREATE TABLE av4(a, b, c);
    CREATE INDEX av4_i1 ON av4(a);
    CREATE INDEX av4_i2 ON av4(b);
    CREATE INDEX av4_i3 ON av4(c);
    CREATE INDEX av4_i4 ON av4(a, b, c);
    INSERT INTO av4 VALUES('av4 a', 'av4 b', 'av4 c');
  }
} {}

do_test autovacuum-2.5.2 {
  execsql {
    SELECT name, rootpage FROM sqlite_master;
  }
} [list av1 3  sqlite_autoindex_av1_1 4 \
        av2 5  sqlite_autoindex_av2_1 6 av2_i1 7 av2_i2 8 \
        av3 9 sqlite_autoindex_av3_1 10 av3_i1 11 \
        av4 12 av4_i1 13 av4_i2 14 av4_i3 15 av4_i4 16 \
]

# The following 4 tests are SELECT queries that use the indices created.
# If the root-pages in the internal schema are not updated correctly when
# a table or indice is moved, these queries will fail. They are repeated
# after each table is dropped (i.e. as test cases 2.5.*.[1..4]).
do_test autovacuum-2.5.2.1 {
  execsql {
    SELECT * FROM av1 WHERE a = 'av1 a';
  }
} {{av1 a} {av1 b} {av1 c}}
do_test autovacuum-2.5.2.2 {
  execsql {
    SELECT * FROM av2 WHERE a = 'av2 a' AND b = 'av2 b' AND c = 'av2 c'
  }
} {{av2 a} {av2 b} {av2 c}}
do_test autovacuum-2.5.2.3 {
  execsql {
    SELECT * FROM av3 WHERE a = 'av3 a' AND b = 'av3 b';
  }
} {{av3 a} {av3 b} {av3 c}}
do_test autovacuum-2.5.2.4 {
  execsql {
    SELECT * FROM av4 WHERE a = 'av4 a' AND b = 'av4 b' AND c = 'av4 c';
  }
} {{av4 a} {av4 b} {av4 c}}

# Drop table av3. Indices av4_i2, av4_i3 and av4_i4 are moved to fill the two
# root pages vacated. The operation proceeds as:
# Step 1: Delete av3_i1 (root-page 11). Move root-page of av4_i4 to page 11.
# Step 2: Delete av3 (root-page 10). Move root-page of av4_i3 to page 10.
# Step 3: Delete sqlite_autoindex_av1_3 (root-page 9). Move av4_i2 to page 9.
do_test autovacuum-2.5.3 {
  execsql {
    DROP TABLE av3;
    SELECT name, rootpage FROM sqlite_master;
  }
} [list av1 3  sqlite_autoindex_av1_1 4 \
        av2 5  sqlite_autoindex_av2_1 6 av2_i1 7 av2_i2 8 \
        av4 12 av4_i1 13 av4_i2 9 av4_i3 10 av4_i4 11 \
]
do_test autovacuum-2.5.3.1 {
  execsql {
    SELECT * FROM av1 WHERE a = 'av1 a';
  }
} {{av1 a} {av1 b} {av1 c}}
do_test autovacuum-2.5.3.2 {
  execsql {
    SELECT * FROM av2 WHERE a = 'av2 a' AND b = 'av2 b' AND c = 'av2 c'
  }
} {{av2 a} {av2 b} {av2 c}}
do_test autovacuum-2.5.3.3 {
  execsql {
    SELECT * FROM av4 WHERE a = 'av4 a' AND b = 'av4 b' AND c = 'av4 c';
  }
} {{av4 a} {av4 b} {av4 c}}

# Drop table av1:
# Step 1: Delete av1 (root page 4). Root-page of av4_i1 fills the gap.
# Step 2: Delete sqlite_autoindex_av1_1 (root page 3). Move av4 to the gap.
do_test autovacuum-2.5.4 {
  execsql {
    DROP TABLE av1;
    SELECT name, rootpage FROM sqlite_master;
  }
} [list av2 5  sqlite_autoindex_av2_1 6 av2_i1 7 av2_i2 8 \
        av4 3 av4_i1 4 av4_i2 9 av4_i3 10 av4_i4 11 \
]
do_test autovacuum-2.5.4.2 {
  execsql {
    SELECT * FROM av2 WHERE a = 'av2 a' AND b = 'av2 b' AND c = 'av2 c'
  }
} {{av2 a} {av2 b} {av2 c}}
do_test autovacuum-2.5.4.4 {
  execsql {
    SELECT * FROM av4 WHERE a = 'av4 a' AND b = 'av4 b' AND c = 'av4 c';
  }
} {{av4 a} {av4 b} {av4 c}}

# Drop table av4:
# Step 1: Delete av4_i4.
# Step 2: Delete av4_i3.
# Step 3: Delete av4_i2.
# Step 4: Delete av4_i1. av2_i2 replaces it.
# Step 5: Delete av4. av2_i1 replaces it.
do_test autovacuum-2.5.5 {
  execsql {
    DROP TABLE av4;
    SELECT name, rootpage FROM sqlite_master;
  }
} [list av2 5 sqlite_autoindex_av2_1 6 av2_i1 3 av2_i2 4]
do_test autovacuum-2.5.5.2 {
  execsql {
    SELECT * FROM av2 WHERE a = 'av2 a' AND b = 'av2 b' AND c = 'av2 c'
  }
} {{av2 a} {av2 b} {av2 c}}

#--------------------------------------------------------------------------
# Test cases autovacuum-3.* test the operation of the "PRAGMA auto_vacuum"
# command.
#
do_test autovacuum-3.1 {
  execsql {
    PRAGMA auto_vacuum;
  }
} {1}
do_test autovacuum-3.2 {
  db close
  sqlite3 db test.db
  execsql {
    PRAGMA auto_vacuum;
  }
} {1}
do_test autovacuum-3.3 {
  execsql {
    PRAGMA auto_vacuum = 0;
    PRAGMA auto_vacuum;
  }
} {1}

do_test autovacuum-3.4 {
  db close
  file delete -force test.db
  sqlite3 db test.db
  execsql {
    PRAGMA auto_vacuum;
  }
} $AUTOVACUUM
do_test autovacuum-3.5 {
  execsql {
    CREATE TABLE av1(x);
    PRAGMA auto_vacuum;
  }
} $AUTOVACUUM
do_test autovacuum-3.6 {
  execsql {
    PRAGMA auto_vacuum = 1;
    PRAGMA auto_vacuum;
  }
} $AUTOVACUUM
do_test autovacuum-3.7 {
  execsql {
    DROP TABLE av1;
  }
  file_pages
} [expr $AUTOVACUUM?1:2]


#-----------------------------------------------------------------------
# Test that if a statement transaction around a CREATE INDEX statement is
# rolled back no corruption occurs.
#
do_test autovacuum-4.0 {
  # The last round of tests may have left the db in non-autovacuum mode.
  # Reset everything just in case.
  #
  db close
  file delete -force test.db test.db-journal
  sqlite3 db test.db
  execsql {
    PRAGMA auto_vacuum = 1;
    PRAGMA auto_vacuum;
  }
} {1}
do_test autovacuum-4.1 {
  execsql {
    CREATE TABLE av1(a, b);
    BEGIN;
  }
  for {set i 0} {$i<100} {incr i} {
    execsql "INSERT INTO av1 VALUES($i, '[string repeat X 200]');"
  }
  execsql "INSERT INTO av1 VALUES(99, '[string repeat X 200]');"
  execsql {
    SELECT sum(a) FROM av1;
  }
} {5049}
do_test autovacuum-4.2 {
  catchsql {
    CREATE UNIQUE INDEX av1_i ON av1(a);
  }
} {1 {indexed columns are not unique}}
do_test autovacuum-4.3 {
  execsql {
    SELECT sum(a) FROM av1;
  }
} {5049}
do_test autovacuum-4.4 {
  execsql {
    COMMIT;
  }
} {}

ifcapable integrityck {

# Ticket #1727
do_test autovacuum-5.1 {
  db close
  sqlite3 db :memory:
  db eval {
    PRAGMA auto_vacuum=1;
    CREATE TABLE t1(a);
    CREATE TABLE t2(a);
    DROP TABLE t1;
    PRAGMA integrity_check;
  }
} ok

}

# Ticket #1728.
#
# In autovacuum mode, when tables or indices are deleted, the rootpage
# values in the symbol table have to be updated.  There was a bug in this
# logic so that if an index/table was moved twice, the second move might
# not occur.  This would leave the internal symbol table in an inconsistent
# state causing subsequent statements to fail.
#
# The problem is difficult to reproduce.  The sequence of statements in
# the following test are carefully designed make it occur and thus to
# verify that this very obscure bug has been resolved.
# 
ifcapable integrityck&&memorydb {

do_test autovacuum-6.1 {
  db close
  sqlite3 db :memory:
  db eval {
    PRAGMA auto_vacuum=1;
    CREATE TABLE t1(a, b);
    CREATE INDEX i1 ON t1(a);
    CREATE TABLE t2(a);
    CREATE INDEX i2 ON t2(a);
    CREATE TABLE t3(a);
    CREATE INDEX i3 ON t2(a);
    CREATE INDEX x ON t1(b);
    DROP TABLE t3;
    PRAGMA integrity_check;
    DROP TABLE t2;
    PRAGMA integrity_check;
    DROP TABLE t1;
    PRAGMA integrity_check;
  }
} {ok ok ok}

}

#---------------------------------------------------------------------
# Test cases autovacuum-7.X test the case where a page must be moved
# and the destination location collides with at least one other
# entry in the page hash-table (internal to the pager.c module. 
#
do_test autovacuum-7.1 {
  db close
  file delete -force test.db
  file delete -force test.db-journal
  sqlite3 db test.db

  execsql {
    PRAGMA auto_vacuum=1;
    CREATE TABLE t1(a, b, PRIMARY KEY(a, b));
    INSERT INTO t1 VALUES(randstr(400,400),randstr(400,400));
    INSERT INTO t1 SELECT randstr(400,400), randstr(400,400) FROM t1; -- 2
    INSERT INTO t1 SELECT randstr(400,400), randstr(400,400) FROM t1; -- 4
    INSERT INTO t1 SELECT randstr(400,400), randstr(400,400) FROM t1; -- 8
    INSERT INTO t1 SELECT randstr(400,400), randstr(400,400) FROM t1; -- 16
    INSERT INTO t1 SELECT randstr(400,400), randstr(400,400) FROM t1; -- 32
  }

  expr {[file size test.db] / 1024}
} {73}

do_test autovacuum-7.2 {
  execsql {
    CREATE TABLE t2(a, b, PRIMARY KEY(a, b));
    INSERT INTO t2 SELECT randstr(400,400), randstr(400,400) FROM t1; -- 2
    CREATE TABLE t3(a, b, PRIMARY KEY(a, b));
    INSERT INTO t3 SELECT randstr(400,400), randstr(400,400) FROM t1; -- 2
    CREATE TABLE t4(a, b, PRIMARY KEY(a, b));
    INSERT INTO t4 SELECT randstr(400,400), randstr(400,400) FROM t1; -- 2
    CREATE TABLE t5(a, b, PRIMARY KEY(a, b));
    INSERT INTO t5 SELECT randstr(400,400), randstr(400,400) FROM t1; -- 2
  }
  expr {[file size test.db] / 1024}
} {354}

do_test autovacuum-7.3 {
  db close
  sqlite3 db test.db
  execsql {
    BEGIN;
    DELETE FROM t4;
    COMMIT;
    SELECT count(*) FROM t1;
  }
  expr {[file size test.db] / 1024}
} {286}

finish_test