SQLite’s Lack of "IF NOT EXISTS" for ADD COLUMN SQLite is a lightweight, serverless database engine that is widely used in embedded systems, mobile applications, and small-scale projects. One of its limitations is the absence of an "IF NOT EXISTS" clause for the ALTER TABLE ADD COLUMN statement. This means that if you attempt to…
FTS5 Module Not Found Despite Correct PRAGMA Settings The core issue revolves around the inability to activate and load the FTS5 extension in SQLite when using a Pascal compiler on a Windows x64 system. The user has confirmed that the SQLite3.dll they are using supports FTS5, as evidenced by successful operations in SQLite Manager with…
Conditional Execution in SQLite Shell Failing Due to Dash Shell Limitations The core issue revolves around attempting to execute conditional logic within the SQLite shell using the .shell meta-command. The user intends to use Bash-specific constructs, such as the double-bracket [[ syntax, for conditional evaluations. However, the SQLite shell defaults to using /bin/dash as the…
GCC LTO Compilation Error with memcmp Size Overflow When attempting to build SQLite version 3.34.0 using GCC with Link-Time Optimization (LTO) enabled, a compilation error occurs. The error message indicates that the memcmp function is being called with a size argument that exceeds the maximum allowable object size. Specifically, the error message reads: ../sqlite/sqlite3.c: In…
SQLite3.DLL Not Found Error in 64-bit Applications When developing applications that utilize SQLite3.DLL, one common issue that arises is the "SQLite3.DLL not found" error. This error typically occurs when there is a mismatch between the bitness of the application and the SQLite3.DLL file. Specifically, this issue is prevalent when an application is developed on a…
Specifying NOCASE and RTRIM Collations in a Single SQLite Query When working with SQLite, one of the most common requirements is to perform case-insensitive comparisons or to trim trailing spaces from strings before comparison. SQLite provides built-in collation sequences like NOCASE and RTRIM to handle these scenarios. However, a frequent question arises: how can you…
SQLite Thread Safety in Multi-Threaded Applications SQLite is a lightweight, serverless database engine widely used in applications ranging from embedded systems to mobile apps. One of its key features is its ability to operate in different threading modes, which determine how the database handles concurrent access from multiple threads. The two primary modes of interest…
SQLite WAL Replication Challenges in Distributed Environments Streaming replication of SQLite databases, particularly the Write-Ahead Logging (WAL) changes, to cloud storage solutions like Amazon S3, presents a unique set of challenges. SQLite is renowned for its simplicity and lightweight nature, making it a popular choice for embedded systems and applications requiring a local database. However,…
SQLite’s File Handling Behavior During High-Frequency INSERTs SQLite is a lightweight, serverless database engine that is widely used in applications requiring embedded database functionality. One of the key aspects of SQLite’s design is its handling of database files during transactions, particularly when performing high-frequency operations like bulk INSERTs. The core issue revolves around whether SQLite…
Reserved Bytes Mismatch During Page Size Reduction The core issue revolves around the SQLite VACUUM command failing to enforce the limit on the number of reserved bytes when the page size is reduced. This results in a corrupted database file that is no longer recognized as a valid SQLite database. The problem manifests when a…