SQLite REAL Constant Doubling Bug in Specific Integer Ranges

SQLite REAL Constant Doubling Bug in Specific Integer Ranges

BySQLite.work Team

Issue Overview: Erroneous Doubling of REAL Constants in 18446744073709550592~18446744073709551609 Range The core issue revolves around SQLite’s handling of integer literals exceeding 9223372036854775807 (2^63-1) when converted to 8-byte IEEE floating point numbers (REAL storage class). For integer values within specific ranges starting with prefixes like 18446744073709550592 (~1.8446744e+19), SQLite versions 3.47.0 through 3.48.0 produce doubled floating-point representations…

Resolving Missing API Exports When Building SQLite Extensions via EXTRA_SRC on Windows

Resolving Missing API Exports When Building SQLite Extensions via EXTRA_SRC on Windows

BySQLite.work Team

Windows-Specific Library Export Failures with EXTRA_SRC and Amalgamation Conflicts Issue Overview: EXTRA_SRC Extensions Break SQLite API Visibility in Windows DLLs When compiling SQLite extensions from the ext/misc/ directory using the EXTRA_SRC build parameter on Windows platforms, developers encounter a critical issue where the resulting shared library (DLL) loses all standard SQLite API exports. This manifests…

Cross-Compiling SQLite Testfixture for Windows on Linux Using MinGW: Issues and Solutions

Cross-Compiling SQLite Testfixture for Windows on Linux Using MinGW: Issues and Solutions

BySQLite.work Team

Issue Overview: Cross-Compiling SQLite Testfixture for Windows on Linux Cross-compiling SQLite’s testfixture for Windows on a Linux system using MinGW involves generating a Windows-compatible executable (testfixture.exe) from a Linux environment. The process requires configuring the build system to target the Windows platform while ensuring that all dependencies, headers, and libraries are correctly resolved. However, the…

Query Performance Discrepancy Between SQLite CLI and C API: Subquery Materialization and Join Ordering

Query Performance Discrepancy Between SQLite CLI and C API: Subquery Materialization and Join Ordering

BySQLite.work Team

Issue Overview: Query Plan Variance Across SQLite Versions and Compile Options The core issue revolves around a SQL query exhibiting drastically different execution times (100x slower) when executed via a C program using the SQLite C API compared to the SQLite command-line interface (CLI). This discrepancy persists even when the CLI is compiled from source…

Identifying and Resolving Open Transactions in SQLite

Identifying and Resolving Open Transactions in SQLite

BySQLite.work Team

Issue Overview: Detecting Uncommitted Transactions in SQLite When working with SQLite, one of the most common issues developers encounter is the inability to start a new transaction because an existing transaction is still open. This situation often arises when a program attempts to execute a BEGIN EXCLUSIVE TRANSACTION statement but receives the error message "Can’t…

Resolving “nope” Error Caused by Trigger in SQLite

Resolving “nope” Error Caused by Trigger in SQLite

BySQLite.work Team

Issue Overview: Understanding the "nope" Error and Its Context The "nope" error message in SQLite is a cryptic and non-descriptive error that often leaves developers scratching their heads. This error typically surfaces when a trigger is involved in the database operations. Triggers in SQLite are special procedures that are automatically executed in response to specific…

Real-Time SQLite Database Backup Strategies for WAL Mode in Lightroom

Real-Time SQLite Database Backup Strategies for WAL Mode in Lightroom

BySQLite.work Team

Issue Overview: Real-Time Backup Challenges with SQLite WAL Mode in Lightroom Photographers and applications like Adobe Lightroom rely on SQLite databases configured with Write-Ahead Logging (WAL) mode for performance and concurrency. The core challenge arises when users need to create real-time backups of the database and its associated WAL files without modifying the application code…

Compiling dbhash.exe on Windows and Linux: Troubleshooting and Solutions

Compiling dbhash.exe on Windows and Linux: Troubleshooting and Solutions

BySQLite.work Team

Issue Overview: Compilation Errors and Missing Dependencies The core issue revolves around the compilation of the dbhash utility, a tool provided by SQLite for generating a hash of the database content. Users attempting to compile dbhash on both Windows and Linux platforms are encountering errors, primarily due to missing dependencies, incorrect build environments, or incomplete…

Compiling SQLite FILEIO.DLL: Resolving Linker Errors on Windows

Compiling SQLite FILEIO.DLL: Resolving Linker Errors on Windows

BySQLite.work Team

Understanding the FILEIO.DLL Compilation Errors When attempting to compile the FILEIO.DLL extension for SQLite3 on a Windows system, users often encounter a series of linker errors that prevent the successful creation of the DLL. These errors typically manifest as unresolved external symbols, such as _opendir, _readdir, _closedir, and _sqlite3_win32_utf8_to_unicode. These symbols are critical for the…

SQLite 3.48.0 Build System Transition Issues and Legacy Compiler Compatibility Challenges

SQLite 3.48.0 Build System Transition Issues and Legacy Compiler Compatibility Challenges

BySQLite.work Team

Build Configuration Shifts, Compilation Failures, and Release Artifact Inconsistencies The impending release of SQLite 3.48.0 introduces significant changes to the build infrastructure that have exposed several critical issues affecting different categories of users. At the core lies the migration from GNU Autoconf to Autosetup for configuration management, a transition that interacts unexpectedly with legacy build…