fix(cubesql): Support CAST in HAVING clause

Author: MazterQyou

rust/cubesql/cubesql/src/compile/mod.rs

@@ -14727,4 +14727,46 @@ ORDER BY \"COUNT(count)\" DESC"
             }
         )
     }
+
+    #[tokio::test]
+    async fn test_thoughtspot_having_cast_float8() {
+        init_logger();
+
+        let logical_plan = convert_select_to_query_plan(
+            r#"
+            WITH "qt_0" AS (
+                SELECT "ta_1"."customer_gender" "ca_1"
+                FROM "KibanaSampleDataEcommerce" "ta_1"
+                GROUP BY "ca_1"
+                HAVING CAST(COUNT("ta_1"."count") AS FLOAT8) < 10.0
+            )
+            SELECT count(DISTINCT "ta_2"."ca_1") "ca_2"
+            FROM "qt_0" "ta_2"
+            "#
+            .to_string(),
+            DatabaseProtocol::PostgreSQL,
+        )
+        .await
+        .as_logical_plan();
+
+        assert_eq!(
+            logical_plan.find_cube_scan().request,
+            V1LoadRequestQuery {
+                measures: Some(vec![]),
+                dimensions: Some(vec!["KibanaSampleDataEcommerce.customer_gender".to_string()]),
+                segments: Some(vec![]),
+                time_dimensions: None,
+                order: None,
+                limit: None,
+                offset: None,
+                filters: Some(vec![V1LoadRequestQueryFilterItem {
+                    member: Some("KibanaSampleDataEcommerce.count".to_string()),
+                    operator: Some("lt".to_string()),
+                    values: Some(vec!["10".to_string()]),
+                    or: None,
+                    and: None
+                }])
+            }
+        )
+    }
 }

rust/cubesql/cubesql/src/sql/statement.rs

@@ -315,6 +315,10 @@ trait Visitor<'ast, E: Error> {
             self.visit_table_with_joins(from)?;
         }
 
+        if let Some(having) = &mut select.having {
+            self.visit_expr(having)?;
+        }
+
         Ok(())
     }