173 lines
8.0 KiB
HTML
173 lines
8.0 KiB
HTML
<!DOCTYPE html>
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<link href="../sqlite.css" rel="stylesheet">
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<title>SQLite Release 3.24.0 On 2018-06-04</title>
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</head>
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<body>
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Small. Fast. Reliable.<br>Choose any three.
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<h2>SQLite Release 3.24.0 On 2018-06-04</h2><p><ol class='lessindent'>
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<li> Add support for PostgreSQL-style <a href="../lang_upsert.html">UPSERT</a>.
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<li> Add support for <a href="../rtree.html#auxcol">auxiliary columns in r-tree tables</a>.
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<li> Add C-language APIs for discovering SQL keywords used by
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SQLite: <a href="../c3ref/keyword_check.html">sqlite3_keyword_count()</a>, <a href="../c3ref/keyword_check.html">sqlite3_keyword_name()</a>, and
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<a href="../c3ref/keyword_check.html">sqlite3_keyword_check()</a>.
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<li> Add C-language APIs for dynamic strings based on the
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<a href="../c3ref/str.html">sqlite3_str</a> object.
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<li> Enhance <a href="../lang_altertable.html">ALTER TABLE</a> so that it recognizes "true" and "false" as
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valid arguments to DEFAULT.
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<li> Add the sorter-reference optimization as a compile-time option.
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Only available if compiled with SQLITE_ENABLE_SORTER_REFERENCES.
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<li> Improve the format of the <a href="../eqp.html">EXPLAIN QUERY PLAN</a> raw output, so that
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it gives better information about the query plan and about the
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relationships between the various components of the plan.
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<li> Added the <a href="../c3ref/c_dbconfig_defensive.html#sqlitedbconfigresetdatabase">SQLITE_DBCONFIG_RESET_DATABASE</a> option to the
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<a href="../c3ref/db_config.html">sqlite3_db_config()</a> API.
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<p><b><a href="../cli.html">CLI</a> Enhancements:</b>
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<li> Automatically intercepts the raw <a href="../eqp.html">EXPLAIN QUERY PLAN</a>
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output and reformats it into an ASCII-art graph.
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<li> Lines that begin with "#" and that are not in the middle of an
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SQL statement are interpreted as comments.
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<li> Added the --append option to the ".backup" command.
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<li> Added the ".dbconfig" command.
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<p><b>Performance:</b>
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<li> <a href="../lang_update.html">UPDATE</a> avoids unnecessary low-level disk writes when the contents
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of the database file do not actually change.
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For example, "UPDATE t1 SET x=25 WHERE y=?" generates no extra
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disk I/O if the value in column x is already 25. Similarly,
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when doing <a href="../lang_update.html">UPDATE</a> on records that span multiple pages, only
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the subset of pages that actually change are written to disk.
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This is a low-level performance optimization only and does not
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affect the behavior of TRIGGERs or other higher level SQL
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structures.
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<li> Queries that use ORDER BY and LIMIT now try to avoid computing
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rows that cannot possibly come in under the LIMIT. This can greatly
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improve performance of ORDER BY LIMIT queries, especially when the
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LIMIT is small relative to the number of unrestricted output rows.
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<li> The <a href="../optoverview.html#or_opt">OR optimization</a> is allowed to proceed
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even if the OR expression has also been converted into an IN
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expression. Uses of the OR optimization are now also
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<a href="../eqp.html#or-opt">more clearly shown</a> in the <a href="../eqp.html">EXPLAIN QUERY PLAN</a> output.
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<li> The query planner is more aggressive about using
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<a href="../optoverview.html#autoindex">automatic indexes</a> for views and subqueries for which it is
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not possible to create a persistent index.
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<li> Make use of the one-pass UPDATE and DELETE query plans in the
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<a href="../rtree.html">R-Tree extension</a> where appropriate.
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<li> Performance improvements in the LEMON-generated parser.
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<p><b>Bug fixes:</b>
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<li> For the right-hand table of a LEFT JOIN, compute the values
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of expressions directly rather than loading precomputed values
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out of an <a href="../expridx.html">expression index</a> as the expression index might
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not contain the correct value. Ticket
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<a href="https://sqlite.org/src/info/7fa8049685b50b5aeb0c2">7fa8049685b50b5aeb0c2</a>
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<li> Do not attempt to use terms from the WHERE clause to enable
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indexed lookup of the right-hand table of a LEFT JOIN. Ticket
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<a href="https://sqlite.org/src/info/4ba5abf65c5b0f9a96a7a">4ba5abf65c5b0f9a96a7a</a>
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<li> Fix a memory leak that can occur following a failure to open error
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in the <a href="../csv.html">CSV virtual table</a>
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<li> Fix a long-standing problem wherein a corrupt schema on the
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<a href="../fileformat2.html#seqtab">sqlite_sequence</a> table used by <a href="../autoinc.html">AUTOINCREMENT</a> can lead to
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a crash. Ticket
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<a href="https://www.sqlite.org/src/info/d8dc2b3a58cd5dc29">d8dc2b3a58cd5dc2918a1</a>
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<li> Fix the <a href="../json1.html#jeach">json_each()</a> function so that it returns
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valid results on its "fullkey" column when the input is a simple value
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rather than an array or object.
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<p><b>Hashes:</b>
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<li>SQLITE_SOURCE_ID: "2018-06-04 19:24:41 c7ee0833225bfd8c5ec2f9bf62b97c4e04d03bd9566366d5221ac8fb199a87ca"
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<li>SHA3-256 for sqlite3.c: 0d384704e1c66026228336d1e91771d295bf688c9c44c7a44f25a4c16c26ab3c
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</ol></p>
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<p>A <a href="../changes.html">complete list of SQLite releases</a>
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in a single page and a <a href="../chronology.html">chronology</a> are both also available.
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A detailed history of every
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check-in is available at
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<a href="http://www.sqlite.org/src/timeline">
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SQLite version control site</a>.</p>
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