Development

Understanding the Absence of Scan Status Functions in SQLite Extensions The core issue revolves around the unavailability of sqlite3_stmt_scanstatus and sqlite3_stmt_scanstatus_v2 functions within SQLite extensions. These functions are designed to provide diagnostic information about query execution, such as the number of rows scanned by specific components of a prepared statement. However, extensions cannot directly access…

Issue Overview: Compiling SQLite 3.41.0 with DJGPP on MS-DOS Compiling SQLite 3.41.0 using DJGPP, a GCC port for MS-DOS, presents a unique set of challenges due to the inherent limitations of the MS-DOS operating system and the specific runtime environment provided by DJGPP. SQLite, being a modern database engine, relies on certain operating system features…

The MAX_PATHNAME=512 Limitation in SQLite Unix VFS SQLite, a widely-used embedded database engine, employs a Virtual File System (VFS) abstraction layer to interact with the underlying operating system’s file system. This abstraction allows SQLite to be portable across various platforms, including Unix-like systems. However, one notable limitation in SQLite’s Unix VFS implementation is the hard-coded…

Behavior of -echo Flag in SQLite CLI: Expected vs. Observed Output The -echo command-line argument in SQLite’s CLI is designed to print SQL statements before executing them, which is particularly useful for debugging scripts or verifying input commands. However, users have reported a discrepancy between expected and observed behavior in SQLite versions 3.40.1 and later….

Issue Overview: Inconsistent Documentation and Segfaults in sqlite3_db_config() The sqlite3_db_config() function in SQLite is a powerful tool for configuring database connections at runtime. However, its documentation has been a source of confusion, particularly regarding the varargs parameters required for different configuration options. The primary issue revolves around the inconsistency in the documentation, which fails to…

Understanding the Challenge of Loading SQLite from memfd via mmap The core issue revolves around the feasibility of loading an SQLite database from a memory file descriptor (memfd) using memory mapping (mmap) for read-only, immutable access. This scenario arises in highly isolated environments where traditional file system access is restricted, and the database must be…

Issue Overview: Temporary Tables Are Not Included in .dump Output When working with SQLite, temporary tables are a powerful feature for managing transient data that does not need to persist beyond the current session. These tables are typically created in the temp schema, which is separate from the main schema that houses permanent tables. However,…

Project Configuration Mismatch in System.Data.SQLite Build Process Issue Overview: Target Framework Declaration Conflicts in Legacy .NET Projects The core issue revolves around a build failure when attempting to compile System.Data.SQLite projects using Visual Studio 2019 or 2022, with the error "Your project does not reference ‘.NETFramework,Version=v4.7’ framework." This error indicates a mismatch between the project’s…

Issue Overview: Assertion Failures and Data Corruption in LSM1 During Large Blob Insertions The core issue revolves around assertion failures and data corruption in the LSM1 database engine when inserting large blobs (512 KB and 1 MB) into the database, particularly when the database size exceeds 2.0 GB. The problem manifests in two distinct scenarios:…

Issue Overview: Integrating SQLite WASM with JavaScript for Executable SQL Examples The integration of SQLite WASM with JavaScript to create executable SQL examples in web components presents a unique set of challenges and opportunities. This approach allows developers to embed interactive SQL queries directly into articles, blogs, or documentation, enabling readers to execute and visualize…