Commita053437

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Dept of second thoughts: the IQ of estimate_array_length() needs to be

kept on par with that of scalararraysel(), else estimates that shouldtrack might not. Hence teach it about binary-compatible cases, too.

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Lines changed: 4 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -15,7 +15,7 @@`
`15`	`15`	`*`
`16`	`16`	`*`
`17`	`17`	`* IDENTIFICATION`
`18`		`- * $PostgreSQL: pgsql/src/backend/utils/adt/selfuncs.c,v 1.222 2007/01/2801:37:38 tgl Exp $`
	`18`	`+ * $PostgreSQL: pgsql/src/backend/utils/adt/selfuncs.c,v 1.223 2007/01/2802:53:34 tgl Exp $`
`19`	`19`	`*`
`20`	`20`	`*-------------------------------------------------------------------------`
`21`	`21`	`*/`
`@@ -1698,6 +1698,9 @@ scalararraysel(PlannerInfo *root,`
`1698`	`1698`	`int`
`1699`	`1699`	`estimate_array_length(Node*arrayexpr)`
`1700`	`1700`	`{`
	`1701`	`+/* look through any binary-compatible relabeling of arrayexpr */`
	`1702`	`+arrayexpr=strip_array_coercion(arrayexpr);`
	`1703`	`+`
`1701`	`1704`	`if (arrayexpr&&IsA(arrayexpr,Const))`
`1702`	`1705`	`{`
`1703`	`1706`	`Datumarraydatum= ((Const*)arrayexpr)->constvalue;`

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