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Overview
Comment:Corrections to the statement that defines when the "PRAGMA page_size" macro is not a no-op.
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SHA1: 1d425258b18a892386ba914e56e8e2aef8ae3b32
User & Date: drh 2016-09-12 10:59:11
Context
2016-09-12
15:39
Split out the "Document Lists and Indexes" category at top of the categorical document list. Change the name of "Result Codes" to "Result and Error Codes" to make the document easier to find. check-in: 8f221f2df8 user: drh tags: trunk
10:59
Corrections to the statement that defines when the "PRAGMA page_size" macro is not a no-op. check-in: 1d425258b1 user: drh tags: trunk
08:34
Fix the search script so that it can search for individual pragmas. Fix a mismatched tag in the document headers causing the search script to index the menubar on every page. check-in: 4d25c80abf user: dan tags: trunk
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Changes to pages/pragma.in.

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    <p>^When a new database is created, SQLite assigned a page size to
    the database based on platform and filesystem.  For many years,
    the default page size was almost always 1024 bytes, but beginning
    with SQLite [version 3.12.0] in 2016, the default page size increased
    to 4096.

    <p>^The page_size pragma will only cause an immediate change in the
    page size if it is issued while the database is still empty (prior 
    to the first CREATE statement) and if the database is not in


    [WAL mode].  ^(If the page_size pragma is
    used to specify a new page size just prior to
    running the [VACUUM] command and if the database is not in
    [WAL | WAL journal mode] then [VACUUM] will change the page
    size to the new value.)^</p>

    <p>^The [SQLITE_DEFAULT_PAGE_SIZE] compile-time option can be used
    to change the default page size assigned to new databases.







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    <p>^When a new database is created, SQLite assigned a page size to
    the database based on platform and filesystem.  For many years,
    the default page size was almost always 1024 bytes, but beginning
    with SQLite [version 3.12.0] in 2016, the default page size increased
    to 4096.

    <p>^The page_size pragma will only set in the
    page size if it is issued before any other SQL statements that
    cause I/O against the database file.
    SQL statements that cause I/O against the database file include
    "CREATE", "SELECT", "BEGIN IMMEDIATE", and "PRAGMA journal_mode=WAL".
    ^(If the page_size pragma is
    used to specify a new page size just prior to
    running the [VACUUM] command and if the database is not in
    [WAL | WAL journal mode] then [VACUUM] will change the page
    size to the new value.)^</p>

    <p>^The [SQLITE_DEFAULT_PAGE_SIZE] compile-time option can be used
    to change the default page size assigned to new databases.