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49 lines
1.4 KiB
Scheme
49 lines
1.4 KiB
Scheme
(module ssql-postgresql
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(*postgresql-translator*)
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(cond-expand
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(chicken-4
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(import chicken scheme)
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(use ssql postgresql foops data-structures))
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(chicken-5
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(import scheme ssql postgresql foops (chicken format) (chicken string))))
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(define *postgresql-translator*
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(let ((type->sql-converters
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`((,boolean? . boolean->sql)
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,@(*ansi-translator* 'type->sql-converters)))
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(clauses-order (append (*ansi-translator* 'clauses-order)
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'(returning))))
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(derive-object (*ansi-translator* self)
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((escape-string string)
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(escape-string (ssql-connection) string))
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((boolean->sql boolean)
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(if boolean "'t'" "'f'"))
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((clauses-order) clauses-order)
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((type->sql-converters) type->sql-converters)
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((array (elements ...))
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(sprintf "ARRAY[~A]"
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(string-intersperse
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(map (lambda (el)
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(self 'ssql->sql el))
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elements)
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", "))))))
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(define-operators *postgresql-translator*
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(limit prefix)
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(offset prefix)
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(returning prefix "RETURNING" ", ")
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(random function)
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(@> infix)
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(<@ infix))
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(register-sql-engine! connection? *postgresql-translator*)
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)
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