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Rename function 'isexists' and 'isdefined' to
'exist' and 'defined' accordingly. Old names are saved not mentioned in docs - for compatibility with old applications. Per discussion http://archives.postgresql.org/pgsql-hackers/2006-10/msg00571.php
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@ -66,12 +66,12 @@ select ('aa=>NULL, c=>d , b=>16'::hstore->'aa') is null;
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-- exists/defined
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select isexists('a=>NULL, b=>qq', 'a');
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select isexists('a=>NULL, b=>qq', 'b');
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select isexists('a=>NULL, b=>qq', 'c');
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select isdefined('a=>NULL, b=>qq', 'a');
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select isdefined('a=>NULL, b=>qq', 'b');
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select isdefined('a=>NULL, b=>qq', 'c');
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select exist('a=>NULL, b=>qq', 'a');
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select exist('a=>NULL, b=>qq', 'b');
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select exist('a=>NULL, b=>qq', 'c');
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select defined('a=>NULL, b=>qq', 'a');
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select defined('a=>NULL, b=>qq', 'b');
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select defined('a=>NULL, b=>qq', 'c');
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-- delete
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