Ambiguity in Subquery Results Leading to Inconsistent Output The core issue revolves around a SQLite query that produces inconsistent results due to an ambiguous subquery. The query involves a nested subquery within a join, and the ambiguity arises from the lack of a deterministic order in the subquery’s results. This ambiguity causes the query to…
Understanding GLOB Operator Behavior with Different Text Encodings The core issue arises when using the GLOB operator to compare values stored as integers containing binary data across databases with different text encodings (UTF-8 vs. UTF-16le). The GLOB operator interprets all inputs as text strings, triggering implicit type conversions that depend on the database’s active encoding….
Unicode Character Conversion in Windows SQLite Shell The issue at hand revolves around the behavior of the Windows SQLite shell (sqlite3.exe) when handling Unicode characters, specifically the Unicode right single quotation mark (U+2019, ’) and its conversion to the ASCII apostrophe (U+0027, ‘). This conversion occurs during the pasting of text into the SQLite shell,…
Understanding the Local .sqliterc Configuration Proposal and Its Implications The SQLite command-line interface (CLI) provides a mechanism for users to define persistent configuration settings through initialization files. By default, the SQLite CLI reads a .sqliterc file from the user’s home directory (~/.sqliterc) or paths specified by the XDG Base Directory Specification. A recent proposal suggested…
Issue Overview: Incorrect Query Result Due to JSON Function Behavior The core issue revolves around an SQLite query that produces an unexpected empty result when JSON functions are involved. The query in question involves a table t0 with a single column c0, a view v0 that uses a CASE statement combined with the json_patch function,…
Issue Overview: LEFT JOIN with Subquery Flattening Yields Incorrect Results The core issue revolves around the incorrect results returned by a SQLite query involving a LEFT JOIN with a subquery. Specifically, the problem arises when SQLite attempts to optimize the query by flattening the subquery in the right operand of the LEFT JOIN. This optimization,…
Issue Overview: Mismatched Results When Modifying OR false in EXISTS Subquery The core issue revolves around an SQLite query returning inconsistent results when a seemingly redundant OR false condition is removed from a WHERE clause within an EXISTS subquery. The original query involves a LEFT OUTER JOIN between a table and a subquery derived from…
Understanding Base85 Encoding Variations in SQLite and Third-Party Tools The core issue revolves around differing outputs produced by SQLite’s base85() function compared to online Base85 encoding tools when processing the same input data. A user observed that encoding the blob "test" using SQLite’s base85() yields KHkS=, while an online encoder returns FCfN8. The base64() function,…
Issue Overview: Compilation Errors Due to Duplicate Definitions and Missing Library References When attempting to compile the SQLite shell with custom extensions and the EXTRA_INIT mechanism, users often encounter two primary types of errors: duplicate symbol definitions during linking and undefined references to external library functions. These errors are typically rooted in the interplay between…
Issue Overview: SQLITE_DEFAULT_FILE_PERMISSIONS Not Affecting File Permissions The core issue revolves around the inability to set the default file permissions for SQLite database files to 600 (read and write permissions for the owner only) using the SQLITE_DEFAULT_FILE_PERMISSIONS compile-time option. The user attempted to compile their application with the flag -DSQLITE_DEFAULT_FILE_PERMISSIONS=0600, expecting that any newly created…