feat(sql): escapes reserved words#1856
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chapmandu
changed the title
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@chapmandu It looks like this change is attempting to automatically escape reserved SQL keywords so users can create tables with names like While this can technically work, I’m not sure this is the right direction. Allowing reserved words as identifiers can create maintenance challenges outside the ORM layer. In most cases, frameworks discourage using reserved keywords rather than accommodating them. It might be safer to either document this limitation clearly or throw a meaningful error instead of implicitly supporting it. |
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Unfortunately, our database schema contained words that became reserved in later versions of MySQL. We had to fork and patch wheels 2.5 before we could upgrade our database version. If we were to upgrade to 3.0, we would require a resolution to this issue, or fork 3.0 and patch it. |
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Thanks for identifying this issue @chapmandu — supporting legacy databases with reserved-word identifiers is a real need, and your use case (table/column names becoming reserved in newer MySQL versions) is exactly the kind of problem a framework should handle. After reviewing this PR, I've taken a different approach in #1874 that addresses the same problem for all database adapters rather than just MySQL: Key differences from this PR:
The approach in #1874 should handle your legacy database scenario across any supported database engine. |
…d word conflicts
Add adapter-specific identifier quoting ($quoteIdentifier) for all 6 database adapters:
- MySQL: backticks (`name`)
- SQL Server: square brackets ([name])
- PostgreSQL, Oracle, SQLite: double-quotes ("name")
- H2: no-op (case-sensitive with quoted identifiers)
Quote table names in FROM, JOIN, DELETE, UPDATE, INSERT clauses and column names
in WHERE, SET, ORDER BY, INSERT column lists, and JOIN ON conditions. SELECT
clause only quotes table name prefixes (not column names) to maintain compatibility
with SQL Server's triple-subquery pagination.
Add $stripIdentifierQuotes helper for comparing rendered SQL containing mixed
quoting styles (used in MSSQL pagination and $identitySelect across all adapters).
Fix read.cfc empty-result regex to handle quoted table prefixes in column lists.
Update test expectations to be adapter-aware using qi() helper that delegates
to the current adapter's quoting character.
Closes #1856
Co-Authored-By: Claude Opus 4.6 <[email protected]>
3 participants
Ensures MySQL reserved words (like groups, order, key, etc.) are properly escaped with backticks when used as table names, preventing SQL syntax errors.
Changes:
$escapeReservedWords() in MySQL adapter checks table names against reserved word list
$fromClause() calls the adapter's escape function when building SQL
Test:
Added test: "escapes MySQL reserved word 'groups' in from clause"
This feature does not define reserved words for all db adapters, only MySQL