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Commitdd1daa0

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Allow NumericOnly to be "+ FCONST".
The NumericOnly grammar production accepted ICONST, + ICONST, - ICONST,FCONST, and - FCONST, but for some reason not + FCONST. This led tostrange inconsistencies likeregression=# set random_page_cost = +4;SETregression=# set random_page_cost = 4000000000;SETregression=# set random_page_cost = +4000000000;ERROR: syntax error at or near "4000000000"(because 4000000000 is too large to be an ICONST). While there'sno actual functional reason to need to write a "+", if we allowit for integers it seems like we should allow it for numerics too.It's been like that forever, so back-patch to all supported branches.Discussion:https://postgr.es/m/30908.1496006184@sss.pgh.pa.us
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‎src/backend/parser/gram.y

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@@ -3688,6 +3688,7 @@ opt_by:BY{}
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NumericOnly:
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FCONST{$$ = makeFloat($1); }
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|'+'FCONST{$$ = makeFloat($2); }
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|'-'FCONST
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{
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$$ = makeFloat($2);

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