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Inconsistent AM/PM Formatting and Missing 12-Hour Clock/ISO Week Support in SQLite’s strftime Function Issue Overview: Conflicting Implementations of %p/%P Modifiers and Absence of Standardized 12-Hour Time/ISO Week Formats The core issue revolves around three interrelated problems with SQLite’s implementation of the strftime function: Case Sensitivity Inconsistencies with %p and %P Modifiers The %p format specifier…

Understanding SQLite HTML Output Mode and Its Limitations SQLite’s HTML output mode is a convenient feature that allows users to export query results directly into an HTML table format. This mode is particularly useful for generating quick HTML representations of database tables or views without requiring additional tools or scripts. However, the simplicity of this…

Issue Overview: U+FEFF Character Stripping in SQLite WASM Wrapper The core issue revolves around the behavior of the SQLite WASM wrapper when decoding byte sequences into JavaScript strings. Specifically, the wrapper strips the leading U+FEFF character, also known as the Byte Order Mark (BOM), during the decoding process. This behavior is a result of the…

Issue Overview: Extending PRAGMA module_list for Enhanced Debugging Capabilities The core issue revolves around the desire to enhance the PRAGMA module_list command in SQLite to provide more detailed debugging information. Currently, PRAGMA module_list returns a virtual table with a single column, name, which lists the names of the modules registered with the SQLite database connection….

Issue Overview: strftime’s Behavior with Negative Years and ISO 8601 Year Representations SQLite’s date and time functions are widely used for manipulating and formatting dates, and they generally handle a broad range of dates, including those with negative years. However, the strftime function exhibits specific behaviors when dealing with negative years and ISO 8601 year…

Display Width Calculation Inconsistencies in Column-Oriented Output Modes Issue Overview The core problem revolves around SQLite’s handling of Unicode characters in its column-oriented output modes (e.g., table, box, markdown). When non-spacing combining characters (e.g., U+0308 COMBINING DIAERESIS) are present in strings, the SQLite shell calculates column widths based on the character count (string length) rather…

SQLite’s Type Handling and cursor.description Behavior SQLite’s dynamic typing system and its interaction with Python’s DB API specification create a unique challenge when retrieving column data types via cursor.description. In SQLite, columns have type affinity rather than rigid data types, allowing values of any type to be stored in any column. This contrasts with databases…

JSON Output and Non-Printable Characters: The DEL Character Issue When working with SQLite, particularly in scenarios where JSON output is required, handling non-printable characters can be a challenging task. One such character that often causes issues is the DEL character (0x7F). This character, along with other non-printable characters, can lead to unexpected behavior in JSON…

Issue Overview: Contradictions Between SQLite Documentation and Source Code Behavior The core issue revolves around whether specific SQLite C API functions designed to retrieve column values from query results can fail due to memory allocation (malloc) errors. The SQLite documentation explicitly states that only a subset of sqlite3_column_* functions—specifically those handling text, BLOB, or byte…

Unexpected Line Feed Behavior in SQLite Shell Column Output The SQLite shell’s column mode output is exhibiting anomalous behavior on Windows 7 environments when compiled with MSYS GCC using the _WIN32 flag. The core issue manifests as unwanted empty lines being inserted between each record in the output when using .mode column command. This behavior…