Compiling SQLite Extensions Separately From Core Library: Feasibility & Solutions

Compiling SQLite Extensions Separately From Core Library: Feasibility & Solutions

BySQLite.work Team

Understanding the Amalgamation Build Process and Extension Integration The SQLite amalgamation is a single C code file (sqlite3.c) and header (sqlite3.h) that combines the entire core library and its built-in extensions into a unified codebase. This design simplifies integration into projects by eliminating external dependencies. However, this monolithic structure raises questions about isolating specific extensions—such…

Memory Leak Issues in SQLite 3.22: Pathsearch and Readfile Functions

Memory Leak Issues in SQLite 3.22: Pathsearch and Readfile Functions

BySQLite.work Team

Memory Leak in Pathsearch Function of Lemon.c The first issue revolves around a potential memory leak in the pathsearch function located in the lemon.c file of SQLite version 3.22. The pathsearch function is responsible for locating files within a specified path, and it dynamically allocates memory to store the path strings. However, under certain conditions,…

Loading Large Files into SQLite: Performance and GUI Hangs

Loading Large Files into SQLite: Performance and GUI Hangs

BySQLite.work Team

Issue Overview: Loading Large Files into SQLite and GUI Viewer Hangs When working with SQLite, one of the most common tasks is importing large datasets into a database. The process of loading a large file, such as a 2.5GB text file with 67 million lines, into an SQLite database can be both time-consuming and resource-intensive….

SQLite C# Update Query Not Affecting Database: Parameter Substitution Issue

SQLite C# Update Query Not Affecting Database: Parameter Substitution Issue

BySQLite.work Team

Issue Overview: SQLite Update Query Execution Without Database Impact When working with SQLite in a C# environment, developers often utilize the SQLiteConnection.Execute method to execute SQL commands such as UPDATE, INSERT, or DELETE. However, a common issue arises when the Execute method returns a success code (e.g., 1), indicating that the query was executed, but…

Password Protection Broken in SQLite 1.0.113: Migration and Rollback Solutions

Password Protection Broken in SQLite 1.0.113: Migration and Rollback Solutions

BySQLite.work Team

Understanding the Removal of SQLITE_HAS_CODEC and Its Impact on Database Encryption Issue Overview The core issue revolves around the removal of the SQLITE_HAS_CODEC feature from SQLite version 3.32.1 and its downstream impact on the System.Data.SQLite NuGet package (version 1.0.113.1). This feature was responsible for enabling password protection and encryption of SQLite databases using methods like…

Precision Loss in geopoly_json Affects geopoly_contains_point Results

Precision Loss in geopoly_json Affects geopoly_contains_point Results

BySQLite.work Team

Geopoly Coordinate Representation Discrepancy: JSON Serialization vs. Internal BLOB Storage Issue Overview: Mismatch Between geopoly_json Output and Internal Polygon Representation The core problem arises from discrepancies in how the SQLite Geopoly extension handles coordinate precision during serialization versus internal computations. When using the geopoly_contains_point() function with polygon coordinates stored directly as text (e.g., ‘[[0,0],[1,0],[1,1.000001],[0,0]]’), the…

Managing and Organizing SQLite Code Repositories Effectively

Managing and Organizing SQLite Code Repositories Effectively

BySQLite.work Team

Issue Overview: The Challenge of Organizing and Versioning SQLite Code Snippets When working on data enrichment projects or any long-term database development effort, SQLite developers often accumulate a large number of SQL queries, scripts, and code snippets. These snippets are typically written to handle specific tasks such as data quality checks, transformations, or enrichment processes….

Missing Canonical Functions and DateTime Handling Issues in SQLite EF6 Provider

Missing Canonical Functions and DateTime Handling Issues in SQLite EF6 Provider

BySQLite.work Team

Incomplete Canonical Function Implementation in SQLite EF6 Provider The core challenges revolve around three interconnected problems in the System.Data.SQLite.EF6.dll’s SQL generation logic. First, the absence of critical canonical function mappings prevents Entity Framework 6 (EF6) from translating LINQ-to-Entities queries into valid SQLite-specific SQL. Canonical functions like DateTime.Now, AddMilliseconds, or mathematical operations lack equivalent implementations in…

Optimizing SQLite LIKE/GLOB Queries with BINARY and NOCASE Collation

Optimizing SQLite LIKE/GLOB Queries with BINARY and NOCASE Collation

BySQLite.work Team

Understanding the Impact of Collation on LIKE/GLOB Optimization in SQLite Issue Overview The core issue revolves around the optimization of SQLite queries that use the LIKE or GLOB operators, particularly when dealing with columns declared as TEXT and the implications of different collation sequences (BINARY and NOCASE). The primary concern is that the default BINARY…

Unexpected Query Results Due to Equivalence Transfer Optimization in SQLite

Unexpected Query Results Due to Equivalence Transfer Optimization in SQLite

BySQLite.work Team

Issue Overview: Unexpected Query Results with Equivalence Transfer Optimization The core issue revolves around a discrepancy in query results when using equivalence transfer optimization in SQLite, particularly when dealing with INTEGER PRIMARY KEY columns. The problem manifests when executing a query that involves joining two tables, t1 and t2, where the join condition includes both…