Lack of Fixed URL for Latest SQLite Amalgamation Downloads The core issue revolves around the absence of a fixed URL that points to the latest version of the SQLite amalgamation. The SQLite amalgamation is a single-file version of the SQLite library, which combines all the necessary source code into one file, making it easier to…
SQLite "No Such Table" Error During HTTPD Service Restart The "no such table" error in SQLite is a common issue that arises when a database query attempts to access a table that does not exist in the specified database. In the context of an HTTPD service restart, this error can occur intermittently, particularly when multiple…
The Challenge of Implementing Decimal Division in SQLite The SQLite database engine introduced a decimal extension to handle decimal arithmetic with precision, addressing the limitations of floating-point arithmetic. This extension provides functions like decimal_add, decimal_sub, and decimal_mul for addition, subtraction, and multiplication, respectively. However, one notable omission is the decimal_div function, which would handle division….
Geopoly Query Performance Degradation Compared to Simple BETWEEN Joins When working with geospatial data in SQLite, the geopoly extension provides a powerful way to handle complex spatial queries, such as finding all points within a specific radius of a given location. However, in some cases, the performance of geopoly queries can be significantly slower compared…
UTF-8 Rendering Issues in SQLite via Perl DBI and JavaScript When working with SQLite databases in a web environment, particularly when migrating from MySQL, UTF-8 encoding issues can arise at multiple stages. These issues often manifest when rendering data in web applications, especially when using Perl’s DBI::SQLite module or JavaScript for front-end interactions. The core…
Token-Based Matching in SQLite FTS: MATCH(‘x’) vs MATCH(‘x*’) SQLite’s Full-Text Search (FTS) is a powerful feature that allows for efficient text-based queries. However, its behavior can sometimes be counterintuitive, especially when dealing with prefix searches and tokenization. The core issue here revolves around the difference between MATCH(‘x’) and MATCH(‘x*’) in SQLite FTS. While both queries…
SQLite strftime Truncation and BCE Year Handling The core issue revolves around the behavior of SQLite’s strftime function when dealing with dates around Julian Day Zero and BCE (Before Common Era) years. Specifically, the strftime function’s %Y format specifier truncates the year value to four characters, which can lead to unexpected results when working with…
Unexpected EXPLAIN QUERY PLAN Output Changes with SQLITE_MAX_MMAP_SIZE=8589934592 When configuring SQLite with a high value for SQLITE_MAX_MMAP_SIZE, specifically 8589934592 (8GB), certain tests fail due to unexpected changes in the EXPLAIN QUERY PLAN output. The issue manifests in the bigmmap test suite, where the query plan output differs from the expected result. This discrepancy is not…
SQLite Database Locking During Schema Migration When attempting to remove a column from an SQLite database and replace it with a new one, a common issue that arises is the database table becoming locked. This typically occurs during the execution of a schema migration script, particularly when using a JDBC driver. The error message A…
Non-Indexed Columns in gaialight Table Causing Ingest Slowdown The core issue revolves around a significant slowdown in data ingestion after adding two non-indexed columns (ra and dec) to the gaialight table in an SQLite database. The database is part of a Python application designed to ingest a subset of the Gaia star catalog into two…