Understanding Sudden Database File Splitting into 2GB Chunks 1. Core Symptoms and Environmental Context The primary issue involves an SQLite database (my_database.db) unexpectedly splitting into multiple files with extensions like .001, .002, each approximately 2GB in size. These files are not valid SQLite databases and appear sporadically during operations involving heavy INSERT, REPLACE, and DELETE…
Issue Overview: Precision and Naming of a New Unix Timestamp Function in SQLite The core issue revolves around the proposal to introduce a new date/time function in SQLite that converts a given date/time argument into a Unix timestamp. A Unix timestamp represents the number of seconds since the Unix epoch, which is 1970-01-01 00:00:00 UTC….
WAL Mode Transition Failures Due to Active Temp Database Prepared Statements When attempting to switch the main database between WAL (Write-Ahead Logging) and other journal modes, SQLite may block the operation if there is an active prepared statement associated with the temp database. This occurs even when the prepared statement is as simple as a…
Understanding the Transactional Guarantees of SQLite Backup Operations The SQLite backup API (sqlite3_backup_init(), sqlite3_backup_step(), and sqlite3_backup_finish()) is designed to create a byte-for-byte copy of a source database into a destination database. A critical aspect of this process is its transactional atomicity: either the entire backup completes successfully, leaving the destination database in a state identical…
Understanding SQLite Syntax and Core Functionality SQLite is a lightweight, serverless, and self-contained SQL database engine that is widely used in embedded systems, mobile applications, and small-to-medium-sized projects. Unlike traditional relational database management systems (RDBMS) such as MySQL or PostgreSQL, SQLite does not require a separate server process and stores the entire database as a…
Decoding the Relationship Between Backup Progress Tracking and Completion Signaling The SQLite Backup API provides developers with a powerful mechanism to create online backups of databases. Two critical functions in this API—sqlite3_backup_step() and sqlite3_backup_remaining()—are central to understanding backup progress and completion. However, their interplay often leads to confusion, particularly around whether a return value of…
Understanding the SQLite Database Integration with IIS in Blazor/ASP.NET Core 6.0 When deploying a Blazor/ASP.NET Core 6.0 application that utilizes SQLite as its database engine to a managed server running IIS and Plesk-Obsidian, developers often encounter a "500 (Internal Server Error)" when making Web-API calls. This error typically indicates that the server is unable to…
Issue Overview: Compilation Error with sqlite3_session Identifier When compiling SQLite with the SQLITE_ENABLE_PREUPDATE_HOOK and SQLITE_ENABLE_SESSION options enabled, a syntax error occurs related to the sqlite3_session identifier. The error manifests as follows: MSVC Compiler Error: sqlite3.c(206932): error C2061: syntax error: identifier ‘sqlite3_session’ GCC Compiler Error: sqlite3.c:206932:3: error: unknown type name ‘sqlite3_session’ The error arises because the…
Understanding SQLite’s Durability Landscape and Litestream’s Role SQLite is a widely adopted embedded database due to its simplicity, portability, and zero-configuration design. However, its default durability guarantees are often misunderstood. By default, SQLite employs a synchronous mode that ensures transactions are flushed to disk before acknowledging a write operation. This behavior is controlled by the…
Issue Overview: JSON1 Extension Fails with Assertion pNode->eU==1 The core issue revolves around an assertion failure in the JSON1 extension of SQLite when attempting to execute a simple JSON query. Specifically, the assertion pNode->eU==1 fails, causing the program to abort with a core dump. This issue manifests when the JSON1 extension is compiled as a…