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Add functions plpy.quote_ident, plpy.quote_literal, plpy.quote_nullable, which wrap the equivalent SQL functions. To be able to propagate char * constness properly, make the argument of quote_literal_cstr() const char *. This also makes it more consistent with quote_identifier(). Jan Urbański, reviewed by Hitoshi Harada, some refinements by Peter Eisentraut
57 lines
991 B
Plaintext
57 lines
991 B
Plaintext
-- test quoting functions
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CREATE FUNCTION quote(t text, how text) RETURNS text AS $$
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if how == "literal":
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return plpy.quote_literal(t)
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elif how == "nullable":
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return plpy.quote_nullable(t)
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elif how == "ident":
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return plpy.quote_ident(t)
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else:
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raise plpy.Error("unrecognized quote type %s" % how)
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$$ LANGUAGE plpythonu;
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SELECT quote(t, 'literal') FROM (VALUES
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('abc'),
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('a''bc'),
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('''abc'''),
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(''),
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(''''),
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('xyzv')) AS v(t);
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quote
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-----------
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'abc'
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'a''bc'
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'''abc'''
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''
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''''
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'xyzv'
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(6 rows)
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SELECT quote(t, 'nullable') FROM (VALUES
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('abc'),
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('a''bc'),
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('''abc'''),
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(''),
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(''''),
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(NULL)) AS v(t);
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quote
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-----------
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'abc'
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'a''bc'
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'''abc'''
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''
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''''
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NULL
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(6 rows)
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SELECT quote(t, 'ident') FROM (VALUES
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('abc'),
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('a b c'),
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('a " ''abc''')) AS v(t);
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quote
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--------------
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abc
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"a b c"
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"a "" 'abc'"
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(3 rows)
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