SQLSTATE 2200T appears when PostgreSQL meets an ill-formed XML processing instruction in an XML value or literal.
PostgreSQL Error 2200T – invalid_xml_processing_instruction – means the database found a malformed processing instruction inside an XML value. Fix it by removing or escaping the stray '<?' sequence or by adding the required name and content parts before saving the XML column.
PostgreSQL Error 2200T
SQLSTATE 2200T signals that PostgreSQL tried to parse an XML value that contains a malformed processing instruction. A processing instruction must start with "". Any deviation triggers this error.
The error appears while inserting, updating, casting, or validating XML data using operators such as XMLPARSE, xmlelement, or when selecting from xml columns.
It can occur in client applications, functions, or triggers that manipulate XML.
Improperly formed processing instructions, stray "" sequences cause the fault. Copy-pasted XML and dynamic string concatenation are common culprits.
Correct or remove the bad processing instruction. Validate the XML with an external linter or PostgreSQL's XMLPARSE before storage.
Escape the "
Data import scripts often inject bad XML. Add a CHECK constraint using xpath to catch malformed nodes early. ORMs that stringify objects might need explicit XML escaping.
Store XML in TEXT until validated, then cast to XML. Use parameterized queries to avoid accidental concatenation issues.
Keep automated tests that insert edge-case XML.
Galaxy's SQL editor highlights malformed XML literals in real time and its AI copilot suggests valid XML snippets, reducing chances of committing bad XML to the database.
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PostgreSQL validates XML against the XML 1.0 standard, so XML 1.1 constructs may fail.
No. The XML data type always enforces well-formedness. Store in TEXT if you need to bypass checks.
Yes. Galaxy's linting engine underlines malformed XML snippets and suggests corrections via the AI copilot.
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