Optimization: When doing an UPDATE on a table with indexes on expressions, do not update the expression indexes if they do not refer to any of the columns of the table being updated.Allow the xBestIndex() method of virtual table implementations to return SQLITE_CONSTRAINT to indicate that the proposed query plan is unusable and should not be given further consideration.Added the SQLITE_DBCONFIG_DEFENSIVE option which disables the ability to create corrupt database files using ordinary SQL.Added support for read-only shadow tables when the SQLITE_DBCONFIG_DEFENSIVE option is enabled.Added the PRAGMA legacy_alter_table command, which if enabled causes the ALTER TABLE command to behave like older version of SQLite (prior to version 3.25.0) for compatibility.Added PRAGMA table_xinfo that works just like PRAGMA table_info except that it also shows hidden columns in virtual tables.Added the explain virtual table as a run-time loadable extension.Add a limit counter to the query planner to prevent excessive sqlite3_prepare() times for certain pathological SQL inputs.Added support for the sqlite3_normalized_sql() interface, when compiling with SQLITE_ENABLE_NORMALIZE.Enhanced triggers so that they can use table-valued functions that exist in schemas other than the schema where the trigger is defined.Enhancements to the CLI: Improvements to the ".help" command. The SQLITE_HISTORY environment variable, if it exists, specifies the name of the command-line editing history file The --deserialize option associated with opening a new database cause the database file to be read into memory and accessed using the sqlite3_deserialize() API. This simplifies running tests on a database without modifying the file on disk.Enhancements to the geopoly extension: Always stores polygons using the binary format, which is faster and uses less space. Added the geopoly_regular() function. Added the geopoly_ccw() function.Enhancements to the session extension: Added the SQLITE_CHANGESETAPPLY_INVERT flag Added the sqlite3changeset_start_v2() interface and the SQLITE_CHANGESETSTART_INVERT flag. Added the changesetfuzz.c test-case generator utility.Hashes:SQLITE_SOURCE_ID: "2018-12-01 12:34:55 bf8c1b2b7a5960c282e543b9c293686dccff272512d08865f4600fb58238b4f9"SHA3-256 for sqlite3.c: 72c08830da9b5d1cb397c612c0e870d7f5eb41a323b41aa3d8aa5ae9ccedb2c4
Dll Files Com Fixer License Key Generator V1 6
The output of sqlite3_trace_v2() now shows each individual SQL statement run within a trigger. Add the ability to read from WAL mode databases even if the application lacks write permission on the database and its containing directory, as long as the -shm and -wal files exist in that directory. Added the rtreecheck() scalar SQL function to the R-Tree extension. Added the sqlite3_vtab_nochange() and sqlite3_value_nochange() interfaces to help virtual table implementations optimize UPDATE operations. Added the sqlite3_vtab_collation() interface. Added support for the "^" initial token syntax in FTS5. New extensions: The Zipfile virtual table can read and write a ZIP Archive. Added the fsdir(PATH) table-valued function to the fileio.c extension, for listing the files in a directory. The sqlite_btreeinfo eponymous virtual table for introspecting and estimating the sizes of the btrees in a database. The Append VFS is a VFS shim that allows an SQLite database to be appended to some other file. This allows (for example) a database to be appended to an executable that then opens and reads the database. Query planner enhancements: The optimization that uses an index to quickly compute an aggregate min() or max() is extended to work with indexes on expressions. The decision of whether to implement a FROM-clause subquery as a co-routine or using query flattening now considers whether the result set of the outer query is "complex" (if it contains functions or expression subqueries). A complex result set biases the decision toward the use of co-routines. The planner avoids query plans that use indexes with unknown collating functions. The planner omits unused LEFT JOINs even if they are not the right-most joins of a query. Other performance optimizations: A smaller and faster implementation of text to floating-point conversion subroutine: sqlite3AtoF(). The Lemon parser generator creates a faster parser. Use the strcspn() C-library routine to speed up the LIKE and GLOB operators. Improvements to the command-line shell: The ".schema" command shows the structure of virtual tables. Added support for reading and writing SQLite Archive files using the .archive command. Added the experimental .expert command Added the ".eqp trigger" variant of the ".eqp" command Enhance the ".lint fkey-indexes" command so that it works with WITHOUT ROWID tables. If the filename argument to the shell is a ZIP archive rather than an SQLite database, then the shell automatically opens that ZIP archive using the Zipfile virtual table. Added the edit() SQL function. Added the .excel command to simplify exporting database content to a spreadsheet. Databases are opened using Append VFS when the --append flag is used on the command line or with the .open command. Enhance the SQLITE_ENABLE_UPDATE_DELETE_LIMIT compile-time option so that it works for WITHOUT ROWID tables. Provide the sqlite_offset(X) SQL function that returns the byte offset into the database file to the beginning of the record holding value X, when compiling with -DSQLITE_ENABLE_OFFSET_SQL_FUNC. Bug fixes: Infinite loop on an UPDATE that uses an OR operator in the WHERE clause. Problem introduced with 3.17.0 and reported on the mailing list about one year later. Ticket 47b2581aa9bfecec. Incorrect query results when the skip-ahead-distinct optimization is used. Ticket ef9318757b152e3a. Incorrect query results on a join with a ORDER BY DESC. Ticket 123c9ba32130a6c9. Inconsistent result set column names between CREATE TABLE AS and a simple SELECT. Ticket 3b4450072511e621 Assertion fault when doing REPLACE on an index on an expression. Ticket dc3f932f5a147771 Assertion fault when doing an IN operator on a constant index. Ticket aa98619ad08ddcabHashes:SQLITE_SOURCE_ID: "2018-01-22 18:45:57 0c55d179733b46d8d0ba4d88e01a25e10677046ee3da1d5b1581e86726f2171d"SHA3-256 for sqlite3.c: 206df47ebc49cd1710ac0dd716ce5de5854826536993f4feab7a49d136b85069
Approximately 25% better performance from the R-Tree extension. Uses compiler built-ins (ex: __builtin_bswap32() or _byteswap_ulong()) for byteswapping when available. Uses the sqlite3_blob key/value access object instead of SQL for pulling content out of R-Tree nodes Other miscellaneous enhancements such as loop unrolling. Add the SQLITE_DEFAULT_LOOKASIDE compile-time option.Increase the default lookaside size from 512,125 to 1200,100 as this provides better performance while only adding 56KB of extra memory per connection. Memory-sensitive applications can restore the old default at compile-time, start-time, or run-time.Use compiler built-ins __builtin_sub_overflow(), __builtin_add_overflow(), and __builtin_mul_overflow() when available. (All compiler built-ins can be omitted with the SQLITE_DISABLE_INTRINSIC compile-time option.)Added the SQLITE_ENABLE_NULL_TRIM compile-time option, which can result in significantly smaller database files for some applications, at the risk of being incompatible with older versions of SQLite.Change SQLITE_DEFAULT_PCACHE_INITSZ from 100 to 20, for improved performance.Added the SQLITE_UINT64_TYPE compile-time option as an analog to SQLITE_INT64_TYPE.Perform some UPDATE operations in a single pass instead of in two passes.Enhance the session extension to support WITHOUT ROWID tables.Fixed performance problems and potential stack overflows when creating views from multi-row VALUES clauses with hundreds of thousands of rows.Added the sha1.c extension.In the command-line shell, enhance the ".mode" command so that it restores the default column and row separators for modes "line", "list", "column", and "tcl". Enhance the SQLITE_DIRECT_OVERFLOW_READ option so that it works in WAL mode as long as the pages being read are not in the WAL file.Enhance the Lemon parser generator so that it can store the parser object as a stack variable rather than allocating space from the heap and make use of that enhancement in the amalgamation.Other performance improvements. Uses about 6.5% fewer CPU cycles.Bug Fixes:Throw an error if the ON clause of a LEFT JOIN references tables to the right of the ON clause. This is the same behavior as PostgreSQL. Formerly, SQLite silently converted the LEFT JOIN into an INNER JOIN. Fix for ticket 25e335f802dd.Use the correct affinity for columns of automatic indexes. Ticket 7ffd1ca1d2ad4ec.Ensure that the sqlite3_blob_reopen() interface can correctly handle short rows. Fix for ticket e6e962d6b0f06f46e.Hashes:SQLITE_SOURCE_ID: "2017-02-13 16:02:40 ada05cfa86ad7f5645450ac7a2a21c9aa6e57d2c"SHA1 for sqlite3.c: cc7d708bb073c44102a59ed63ce6142da1f174d1
Potentially Disruptive Change:The SQLITE_DEFAULT_PAGE_SIZE is increased from 1024 to 4096. The SQLITE_DEFAULT_CACHE_SIZE is changed from 2000 to -2000 so the same amount of cache memory is used by default. See the application note on the version 3.12.0 page size change for further information.Performance enhancements:Enhancements to the Lemon parser generator so that it creates a smaller and faster SQL parser.Only create master journal files if two or more attached databases are all modified, do not have PRAGMA synchronous set to OFF, and do not have the journal_mode set to OFF, MEMORY, or WAL.Only create statement journal files when their size exceeds a threshold. Otherwise the journal is held in memory and no I/O occurs. The threshold can be configured at compile-time using SQLITE_STMTJRNL_SPILL or at start-time using sqlite3_config(SQLITE_CONFIG_STMTJRNL_SPILL).The query planner is able to optimize IN operators on virtual tables even if the xBestIndex method does not set the sqlite3_index_constraint_usage.omit flag of the virtual table column to the left of the IN operator.The query planner now does a better job of optimizing virtual table accesses in a 3-way or higher join where constraints on the virtual table are split across two or more other tables of the join.More efficient handling of application-defined SQL functions, especially in cases where the application defines hundreds or thousands of custom functions.The query planner considers the LIMIT clause when estimating the cost of ORDER BY.The configure script (on unix) automatically detects pread() and pwrite() and sets compile-time options to use those OS interfaces if they are available.Reduce the amount of memory needed to hold the schema.Other miscellaneous micro-optimizations for improved performance and reduced memory usage.New Features:Added the SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER option to sqlite3_db_config() which allows the two-argument version of the fts3_tokenizer() SQL function to be enabled or disabled at run-time.Added the sqlite3rbu_bp_progress() interface to the RBU extension.The PRAGMA defer_foreign_keys=ON statement now also disables RESTRICT actions on foreign key.Added the sqlite3_system_errno() interface.Added the SQLITE_DEFAULT_SYNCHRONOUS and SQLITE_DEFAULT_WAL_SYNCHRONOUS compile-time options. The SQLITE_DEFAULT_SYNCHRONOUS compile-time option replaces the SQLITE_EXTRA_DURABLE option, which is no longer supported.Enhanced the ".stats" command in the command-line shell to show more information about I/O performance obtained from /proc, when available.Bug fixes:Make sure the sqlite3_set_auxdata() values from multiple triggers within a single statement do not interfere with one another. Ticket dc9b1c91.Fix the code generator for expressions of the form "x IN (SELECT...)" where the SELECT statement on the RHS is a correlated subquery. Ticket 5e3c886796e5512e.Fix a harmless TSAN warning associated with the sqlite3_db_readonly() interface.Hashes:SQLITE_SOURCE_ID: "2016-03-29 10:14:15 e9bb4cf40f4971974a74468ef922bdee481c988b"SHA1 for sqlite3.c: cba2be96d27cb51978cd4a200397a4ad178986eb
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