Development

Interop Binary Versioning Conflicts in Multi-Add-In Excel Environments Issue Overview The core problem revolves around version incompatibility in SQLite.Interop.dll files when multiple Excel add-ins attempt to load different versions of the library simultaneously. In Windows environments, the System.Data.SQLite NuGet package provides statically linked binaries (sqlite-netFx46-static-binary-x64-2015-1.0.117.0.zip) that allow developers to rename the interop DLL to include…

Issue Overview: UNIQUE Constraint Violation in iOS Cache Database Operations The core issue revolves around an unexpected UNIQUE constraint violation occurring during SQLite database operations in an iOS application environment. The specific error message reports a failed unique constraint on the request_key column of the cfurl_cache_response table during an INSERT operation. This table is not…

Memory Allocation Failures in WebAssembly-Based SQLite Implementations WebAssembly Memory Constraints and Browser-Specific Resource Management The "WebAssembly.Memory(): could not allocate memory" error occurs when a WebAssembly (WASM) module attempts to reserve memory beyond what the host environment permits. In SQLite WASM implementations using the Origin Private File System (OPFS) via the sqlite3-bundler-friendly.mjs module, this manifests during…

OPFS File Persistence Failure in SQLite WebAssembly Applications When integrating SQLite with WebAssembly (WASM) in Progressive Web Apps (PWAs), developers often encounter scenarios where database files created via the sqlite3-worker1-promiser.js API fail to persist in the Origin Private File System (OPFS). This manifests as empty file systems in tools like Chrome’s OPFS Explorer, even though…

Issue Overview: Persistent Local Storage in Remote JS Applications with SQLite The core issue revolves around implementing a persistent local storage solution for a JavaScript (JS) web application hosted on a remote server, where the application itself does not run on the server but is merely served to the client. The primary challenge is to…

Understanding the Need for ROWID Metadata in Query Projections The core issue revolves around the absence of a dedicated SQLite C API to retrieve the ROWID or equivalent primary key metadata for rows in query results (referred to as "projections"). Existing APIs such as sqlite3_column_table_name() and sqlite3_column_database_name() provide metadata about the source of column values,…

The Challenge of Asynchronous Operations in SQLite Virtual Tables The core issue revolves around the integration of asynchronous operations, particularly in JavaScript (JS), with SQLite’s virtual table API when using WebAssembly (WASM) builds. SQLite’s virtual tables allow developers to create custom data sources that behave like regular tables, enabling powerful extensions to the database engine….

Issue Overview: Importing CSV Data with CRLFs and Custom Separators When working with SQLite, importing CSV data that contains carriage return and line feed (CRLF) characters within fields can be particularly challenging, especially when custom separators are involved. The core issue arises from the mismatch between the data format exported from the source (in this…

Understanding Implicit Integer Conversion Warnings in SQLite Code Core Problem: Integer Precision Loss Across Variable Assignments The warnings arise due to assignments between variables of different integer types where the target type has a smaller storage size than the source type. In SQLite’s C codebase, variables such as i64 (64-bit integers), size_t (unsigned long), and…

Understanding the Limitation of SQLITE_CONFIG_LOG Post-Initialization SQLite is a widely-used, lightweight, and embedded relational database management system that offers a rich set of configuration options to tailor its behavior to specific application needs. One such configuration option is SQLITE_CONFIG_LOG, which allows developers to set up a custom logging function to handle SQLite’s internal logging. This…