Function isWriteSelect

backend/plugin/parser/pg/query_antlr.go:91–99

isWriteSelect reports whether a SelectStmt actually writes — and so must not take the read-only editor path. A SELECT writes if it has an INTO target (SELECT ... INTO creates a table) or any of its CTE terms is data-modifying. This is the unified write-detection primitive for the read-only gate; cl

(n *ast.SelectStmt)

// classifyQueryType (query_type.go) keeps reporting the root statement type for its
// own consumers — only the detection is shared, not the classifiers' outputs.
func isWriteSelect(n *ast.SelectStmt) bool {
	if n == nil {
		return false
	}
	if hasOmniIntoClause(n) {
		return true
	}
	return containsWriteCTE(n)
}

// containsWriteCTE reports whether any common table expression in the tree is
// data-modifying. Fail-safe by construction — a whitelist, not a denylist: a CTE