DateTime to Epoch Conversion with Millisecond Precision in SQLite Converting a datetime string to the number of seconds since the Unix Epoch (January 1, 1970) with millisecond precision is a common requirement in database operations. SQLite provides several built-in functions to handle datetime conversions, but achieving millisecond precision can be tricky due to the way…
Benchmarking SQLite Versions with LumoSQL: Understanding the Process Benchmarking SQLite versions is a critical task for developers and database administrators who need to evaluate the performance of different SQLite releases under specific workloads. LumoSQL provides a robust framework for conducting these benchmarks, but the process is not without its challenges. The primary goal of benchmarking…
Incorrect Boolean Logic in CASE Expression Leading to Unexpected NULL Values The core issue revolves around the misuse of the CASE expression within an SQLite trigger, specifically when attempting to set a value based on the new.type column. The trigger is designed to insert a row into table t2 with a val column that should…
OLE Error 800A03EC During SQLite-to-Excel Export Process The OLE error 800A03EC is a Windows-specific error that occurs during the process of exporting data from SQLite to Excel. This error typically manifests when a user attempts to send query results from SQLite to Excel, but the operation fails midway, leaving Excel unopened while a background process…
Database Structure Design for Portfolio Management When designing a database for a portfolio management application, the primary challenge lies in determining the optimal structure to handle user-generated portfolios, modules, and associated media files. The goal is to ensure efficient data retrieval, updates, and sharing while maintaining a logical and scalable schema. The core considerations include…
SQLite3 Header Inclusion and Library Linking in C/C++ on Linux When working with SQLite3 in C/C++ on a Linux environment, one of the most common challenges developers face is correctly including the SQLite3 header file and linking the SQLite3 library to their project. This process is crucial for enabling the use of SQLite3 functions within…
Adding Custom Columns to SQLite Archive (SQLAR) Tables SQLite Archive (SQLAR) is a specialized use case of SQLite designed for storing and managing file archives, often used in applications like Fossil SCM. The SQLAR schema typically includes a table named sqlar with predefined columns such as name, mode, mtime, sz, and data. These columns store…
Test ext/session/sessionrebase.test:2.1.1 Fails on HPPA Architecture The issue at hand involves the failure of the SQLite test case ext/session/sessionrebase.test:2.1.1 specifically on the HPPA (Hewlett-Packard Precision Architecture) platform. This failure is unique to HPPA and has not been observed on other architectures. The error manifests as a Tcl scripting error, where the test fixture reports an…
SQLite Browser Misinterprets CHECK Constraint Syntax The issue at hand revolves around a misinterpretation of SQLite’s CHECK constraint syntax by a third-party tool, SQLite Browser. The error message Sqlite parse error: line 1:94: expecting RPAREN, found ‘OR’ suggests that SQLite Browser is unable to correctly parse the CHECK constraint within a CREATE TABLE statement. This…
SQLite Database Locked After Application Hot-Restart When working with SQLite3 (specifically SQLCipher) in a Flutter application using FFI (Foreign Function Interface), a common issue arises where the database becomes locked after an application hot-restart. This issue is particularly perplexing because the pragma lock_status command indicates that the database is unlocked, yet attempts to perform write…