SQLite3 Executable Missing After Downloading DLL Files When attempting to run SQLite3 on a Windows 10 machine with an x64 processor, users often encounter confusion when they download and unzip the SQLite package, only to find files like sqlite3.dll and sqlite3.def instead of the expected sqlite3.exe. This issue arises because the downloaded package contains the…
SQLite Provider Not Found Error in .NET Framework 4.7.2 with EF 6.x When integrating SQLite with the .NET Framework 4.7.2 and Entity Framework (EF) 6.x, a common issue arises when attempting to call the resulting library from VBA via a COM interface. The error message "provider not found" typically indicates that the SQLite provider is…
SQLite3.c Compilation Error Due to Mixed Declarations and Code The core issue revolves around a compilation error encountered when attempting to build SQLite3 using the C89 standard. The error message specifically points to a violation of the ISO C90 (commonly referred to as C89) standard, which prohibits mixed declarations and code within a function. The…
SQLite User Authentication and Precompiled DLLs SQLite is a lightweight, serverless, and self-contained database engine that is widely used in applications requiring embedded database functionality. One of the lesser-known features of SQLite is its ability to support user authentication through the SQLITE_USER_AUTHENTICATION compile-time option and the sqlite3_user_authenticate() interface. This feature allows developers to implement password-protected…
SQLite RETURNING Clause and Partial Cursor Consumption The SQLite RETURNING clause, introduced to provide PostgreSQL-like functionality for returning modified rows after INSERT, UPDATE, or DELETE operations, exhibits a unique behavior that can catch developers off-guard. Specifically, the RETURNING clause requires explicit consumption of the resulting cursor to ensure that all modifications are applied. This behavior…
SQLite PENDING_BYTE and Locking Behavior in Sub-1GB Databases The SQLite database engine employs a sophisticated locking mechanism to ensure data integrity and concurrency control. One of the key components of this mechanism is the PENDING_BYTE, which is a byte used for setting PENDING locks. The PENDING_BYTE is typically located at the 0x40000000 (1 GB) offset…
VFS Extensions for Compression and Web Access in SQLite SQLite is renowned for its lightweight, serverless, and embedded nature, making it a popular choice for a wide range of applications. However, as data volumes grow and the need for efficient storage and access mechanisms becomes more pressing, developers often seek to extend SQLite’s capabilities. Two…
RETURNING Clause Limitations in CTEs and Subqueries The RETURNING clause in SQLite is a powerful feature that allows users to retrieve the rows affected by an INSERT, UPDATE, or DELETE operation. However, its current implementation has notable limitations, particularly when used within Common Table Expressions (CTEs) and subqueries. The RETURNING clause is not supported in…
SQLite WAL Mode Configuration Fails on VxWorks with HRFS When attempting to configure SQLite to use Write-Ahead Logging (WAL) mode on VxWorks 7 with the HRFS file system, the operation fails, and the journal mode reverts to "delete" instead of "WAL". This issue arises despite other journal modes functioning correctly. The problem is rooted in…
Savepoint Rollback Prevents Subsequent Savepoint Changes from Persisting When working with SQLite, understanding the behavior of savepoints, rollbacks, and releases is crucial for ensuring data integrity and expected transaction outcomes. A common issue arises when changes made between a savepoint and release statement do not persist in the database if a previous savepoint was rolled…