SQLite UNION Query Behavior with ORDER BY and Functions When working with SQLite, a common task is to combine results from multiple queries using the UNION operator. However, a specific issue arises when attempting to use a function like lower() in the ORDER BY clause of a UNION query. The query fails with the error:…
SQLite CVE-2020-15358: A Medium Severity Vulnerability in Versions Prior to 3.32.3 SQLite, a widely-used embedded database engine, has been subject to various security vulnerabilities over the years. One such vulnerability, identified as CVE-2020-15358, has been flagged as a medium severity issue with a CVSS score of 5.5. This vulnerability affects SQLite versions prior to 3.32.3…
Query Performance Degradation with Date-Based Filtering When executing a query in SQLite that involves filtering based on a specific date, you may encounter significant performance degradation, especially when the query involves correlated subqueries or joins. This issue often manifests when the query planner is unable to leverage existing indexes effectively due to the structure of…
SQLite Version Discrepancy Between System and Python Environment When working with SQLite in a Python Flask application on macOS, a common issue arises when the SQLite version used by the Python environment is older than the version installed on the system. This discrepancy can lead to compatibility issues, especially when relying on features introduced in…
In-Memory Database Accessibility Across Multiple Processes The core issue revolves around the accessibility of an SQLite in-memory database across multiple processes. SQLite is designed to be a lightweight, serverless database engine, and its in-memory database feature is typically used for temporary data storage within a single process. However, there are scenarios where developers attempt to…
Database Growth Despite Minimal Data Insertion SQLite databases are known for their lightweight and efficient design, but under certain conditions, they can exhibit unexpected behavior, such as rapid and unexplained growth in file size. This issue often manifests when the database file grows significantly larger than the actual data it contains, even when no new…
SQLite Shell Segmentation Fault in Interactive Mode on Solaris 10 SPARCv9 The issue at hand involves a segmentation fault occurring in the SQLite shell (sqlite3) when running in interactive mode on a Solaris 10 SPARCv9 system. The segmentation fault is triggered during the initialization of the terminal I/O subsystem, specifically within the readline library. This…
SQLite Query Planner Prefers Superset Index Over More Efficient Option The core issue revolves around the SQLite query planner’s tendency to favor an index that covers more columns in the WHERE clause, even when a more efficient index exists. In this scenario, the query involves joining three tables: Games, Relations, and Classifications. The query planner…
SQLITE_CANTOPEN Error When Opening WAL Databases on V1 VFS The SQLITE_CANTOPEN error is a common yet perplexing issue that arises when attempting to open SQLite databases in Write-Ahead Logging (WAL) mode using a Version 1 Virtual File System (VFS). This error typically occurs when the VFS does not support the Shared Memory (SHM) feature, which…
Parameter Binding Fails in Tabular Output Modes (Box/Markdown/Table/Column) The issue at hand revolves around the SQLite Command Line Interface (CLI) failing to bind parameters correctly when using tabular output modes such as box, markdown, table, and column. This problem manifests in the pre-release version 3.33.0 of SQLite, where parameterized queries do not produce the expected…