feat: Allow filtering by IS DISTINCT FROM using the isdistinct operator

2023-04-06 13:02:03 -05:00
parent acf62320ef
commit d3b10e7b2a
7 changed files with 28 additions and 1 deletions
@@ -305,6 +305,8 @@ pgFmtFilter table (Filter fld (OpExpr hasNot oper)) = notOp <> " " <> case oper
     TriNull    -> "NULL"
     TriUnknown -> "UNKNOWN"

+   IsDistinctFrom val -> pgFmtField table fld <> " IS DISTINCT FROM " <> unknownLiteral val
+
   -- We don't use "IN", we use "= ANY". IN has the following disadvantages:
   -- + No way to use an empty value on IN: "col IN ()" is invalid syntax. With ANY we can do "= ANY('{}')"
   -- + Can invalidate prepared statements: multiple parameters on an IN($1, $2, $3) will lead to using different prepared statements and not take advantage of caching.