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PHP RFC: Escape PDO placeholders
PostgreSQL, and possibly other databases, allow the usage of the question mark (“?”) character in operators, either alone or part of a multi-character operator. In fact, as of today, core Postgres currently has 21 operators that include it in their names. Most of them belong to geometric types, but 3 of them apply to the jsonb type, which has been introduced in Postgres 9.4 and has a much wider and growing audience. Unfortunately it is impossible to use them with the PDO extension, due to a clash with the positional placeholder, which can't currently be disabled or escaped.
Improve the PDO SQL parser so that question marks can be escaped by doubling them, in order to follow the SQL standard.
Backward Incompatible Changes
What breaks, and what is the justification for it?
Proposed PHP Version(s)
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To Existing Extensions
All PDO drivers will be somehow affected by the change, but there is no API change.
Make sure there are no open issues when the vote starts!
Unaffected PHP Functionality
List existing areas/features of PHP that will not be changed by the RFC.
This helps avoid any ambiguity, shows that you have thought deeply about the RFC's impact, and helps reduces mail list noise.
This sections details areas where the feature might be improved in future, but that are not currently proposed in this RFC.
Proposed Voting Choices
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Patches and Tests
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For changes affecting the core language, you should also provide a patch for the language specification.
After the project is implemented, this section should contain
- the version(s) it was merged to
- a link to the git commit(s)
- a link to the PHP manual entry for the feature
- a link to the language specification section (if any)
Links to external references, discussions or RFCs
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