Postgresql: Declare the same setting for nulls in indexes as in order by statement

alex-kulakov · alex-kulakov · commit 79981d1ffb54 · 2025-01-22T14:54:16.000+05:00
otherwise, index order conflicts with order by which cause longer query execution.
According to documentation default settings for nulls are exact opposite.
diff --git a/Orm/Xtensive.Orm.PostgreSql/Sql.Drivers.PostgreSql/v9_0/Translator.cs b/Orm/Xtensive.Orm.PostgreSql/Sql.Drivers.PostgreSql/v9_0/Translator.cs
@@ -30,6 +30,9 @@ public override void Translate(SqlCompilerContext context, object literalValue)
       }
     }
 
+    public override void TranslateSortOrder(IOutput output, bool ascending) =>
+      output.Append(ascending ? "ASC NULLS FIRST" : "DESC NULLS LAST");
+
     // Constructors
 
     public Translator(SqlDriver driver)

Original file line number	Diff line number	Diff line change
`@@ -30,6 +30,9 @@ public override void Translate(SqlCompilerContext context, object literalValue)`
`30`	`30`	`}`
`31`	`31`	`}`
`32`	`32`
	`33`	`+ public override void TranslateSortOrder(IOutput output, bool ascending) =>`
	`34`	`+ output.Append(ascending ? "ASC NULLS FIRST" : "DESC NULLS LAST");`
	`35`	`+`
`33`	`36`	`// Constructors`
`34`	`37`
`35`	`38`	`public Translator(SqlDriver driver)`