Resolving Mangled Entry Points in SQLite.Interop.dll When Building System.Data.SQLite from Source

Resolving Mangled Entry Points in SQLite.Interop.dll When Building System.Data.SQLite from Source

BySQLite.work Team

Issue Overview: Mismatched Entry Points Between Managed System.Data.SQLite and Native SQLite.Interop.dll When integrating the managed System.Data.SQLite library with the native SQLite.Interop.dll, a critical requirement is that the managed assembly must locate and bind to specific exported functions (entry points) in the native DLL. These entry points are the bridges between the .NET runtime and the…

OPFS-sahpool VFS Filename Encoding Bug and WASM Build Issues in SQLite

OPFS-sahpool VFS Filename Encoding Bug and WASM Build Issues in SQLite

BySQLite.work Team

Issue Overview: OPFS-sahpool VFS Filename Encoding Bug and WASM Build Challenges The core issue revolves around a bug in the OPFS-sahpool VFS (Virtual File System) implementation in SQLite/WASM, specifically related to filename encoding when files are reused from the SahPool. When a file is returned to the pool and later reused for another database, the…

Resolving SQLITE_NOMEM During Large Database Export in SQLite Wasm

Resolving SQLITE_NOMEM During Large Database Export in SQLite Wasm

BySQLite.work Team

Database Serialization Failure with SQLITE_NOMEM in WebAssembly (Wasm) Environments Issue Overview: Serialization Failure During Wasm Database Export When attempting to export a large SQLite database (500+ MB) in a WebAssembly (Wasm) environment using the sqlite3_js_db_export method or the Promiser API’s export command, the operation fails with the error code SQLITE_NOMEM ("out of memory"). This issue…

Inconsistent Query Results with SQLite WAL Mode and Immutable Flag

Inconsistent Query Results with SQLite WAL Mode and Immutable Flag

BySQLite.work Team

Understanding the Behavior of SQLite WAL Mode on Read-Only Filesystems SQLite’s Write-Ahead Logging (WAL) mode is a powerful feature that allows concurrent reads and writes by separating the write operations into a separate log file (the WAL file) while allowing readers to access the main database file directly. This mode is particularly useful for improving…

SQLite 3.44.0 JSONB Scope, Aggregate ORDER BY Quirks, & Documentation Fixes

SQLite 3.44.0 JSONB Scope, Aggregate ORDER BY Quirks, & Documentation Fixes

BySQLite.work Team

JSONB Implementation Scope and Usage Clarifications The introduction of JSONB in SQLite 3.44.0 beta has sparked debates about its intended role. JSONB is a binary representation of JSON designed for efficient storage and processing within SQLite. However, confusion arose due to conflicting interpretations of its purpose. Users questioned whether JSONB should be treated as a…

Optimizing SQLite’s Default MMAP Limit for 64-bit Environments

Optimizing SQLite’s Default MMAP Limit for 64-bit Environments

BySQLite.work Team

Understanding SQLite’s Default MMAP Limit and Its Implications SQLite’s memory-mapped I/O (MMAP) feature is a powerful mechanism that allows the database to map portions of its file directly into the process’s address space, bypassing the traditional file I/O operations. This can significantly improve performance for certain workloads by reducing the overhead associated with system calls…

Out-of-Memory Error in SQLite Due to json_valid Function

Out-of-Memory Error in SQLite Due to json_valid Function

BySQLite.work Team

Issue Overview: Out-of-Memory Error Triggered by json_valid in SQLite The core issue revolves around an unexpected out-of-memory error in SQLite when executing a query involving the json_valid function. The error occurs in a specific environment where SQLite is compiled with the SQLITE_ENABLE_STAT4 option, and the query involves a comparison operation with the result of json_valid(2)….

Optimizing SQLite Queries Combining FTS and Non-FTS Indexes

Optimizing SQLite Queries Combining FTS and Non-FTS Indexes

BySQLite.work Team

Understanding the Query Planner’s Behavior with FTS and Non-FTS Indexes The core issue revolves around the inefficiency of the SQLite query planner when combining Full-Text Search (FTS) indexes with non-FTS indexes. The problem manifests when attempting to filter records using both FTS and non-FTS criteria, particularly when the FTS filter returns a broad result set….

Efficiently Querying and Updating Geopoly Tables in SQLite

Efficiently Querying and Updating Geopoly Tables in SQLite

BySQLite.work Team

Issue Overview: Querying and Updating Geopoly Tables for Spatial Containment When working with spatial data in SQLite, particularly with the geopoly extension, one common task is to determine which polygon (in this case, an ecoregion) contains a given point (in this case, a material citation). The goal is to efficiently list all material citations along…

Implementing Natural Sort Order in SQLite: Challenges and Solutions

Implementing Natural Sort Order in SQLite: Challenges and Solutions

BySQLite.work Team

Understanding Natural Sort Order and Its Importance in SQLite Natural sort order, often referred to as human-friendly sorting, is a method of sorting strings that contain numbers in a way that is intuitive to humans. Unlike lexicographical sorting, which treats numbers as characters and sorts them based on their ASCII values, natural sort order recognizes…