[
https://issues.apache.org/jira/browse/CALCITE-1946?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Julian Hyde updated CALCITE-1946:
---------------------------------
Fix Version/s: 1.15.0
> Dialects lacking support for nested aggregations should use sub select instead
> ------------------------------------------------------------------------------
>
> Key: CALCITE-1946
> URL: https://issues.apache.org/jira/browse/CALCITE-1946
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.14.0
> Reporter: Pawel Ruchaj
> Assignee: Julian Hyde
> Fix For: 1.15.0
>
>
> Below query, containing 2 SUM aggregation functions and sub-select, gets
> converted to a SQL that fails when executed in various SQL engines.
> h4. SQL
> {code:sql}
> SELECT SUM("net_weight1") AS "net_weight_converted"
> FROM (
> SELECT SUM(" net_weight") AS "net_weight1"
> FROM "foodmart"."product"
> GROUP BY "product_id")
> {code}
> h4. Expected:
> {code:sql}
> SELECT SUM("net_weight1") AS "net_weight_converted"
> FROM (SELECT
> "product_id",
> SUM("net_weight") AS "net_weight1"
> FROM "foodmart"."product"
> GROUP BY "product_id") AS "t0"
> {code}
> h4. Actual:
> {code:sql}
> SELECT SUM(SUM("net_weight")) AS "net_weight_converted"
> FROM "foodmart"."product"
> GROUP BY "product_id"
> {code}
> h4. Returned errors:
> - MySQL 5.1.73
> {code}Invalid use of group function{code}
> - MemSQL 5.5.8:
> {code}[HY000][1111] Invalid use of group function{code}
> - HP Vertica: 7.2.1-0:
> {code}[42803][2135] [Vertica][VJDBC](2135) ERROR: Aggregate function calls
> may not be nested java.lang.RuntimeException:
> com.vertica.support.exceptions.SyntaxErrorException: [Vertica][VJDBC](2135)
> ERROR: Aggregate function calls may not be nested{code}
> - PostgreSQL 9.6:
> {code}ERROR: aggregate function calls cannot be nested{code}
> h4. Test Case
> {code:java}
> @Test public void
> testEnginesLackingSupportForNestedAggregationsShouldUseSubSelectInstead() {
> final String query = "select\n"
> + " SUM(\"net_weight1\") as \"net_weight_converted\"\n"
> + " from ("
> + " select\n"
> + " SUM(\"net_weight\") as \"net_weight1\"\n"
> + " from \"foodmart\".\"product\"\n"
> + " group by \"product_id\")";
> final String expectedOracle = "SELECT SUM(SUM(\"net_weight\"))
> \"net_weight_converted\"\n"
> + "FROM \"foodmart\".\"product\"\n"
> + "GROUP BY \"product_id\"";
> final String expectedMySQL = "SELECT SUM(`net_weight1`) AS
> `net_weight_converted`\n"
> + "FROM (SELECT `product_id`, SUM(`net_weight`) AS `net_weight1`\n"
> + "FROM `foodmart`.`product`\n"
> + "GROUP BY `product_id`) AS `t0`";
> final String expectedVertica = "SELECT SUM(\"net_weight1\") AS
> \"net_weight_converted\"\n"
> + "FROM (SELECT \"product_id\", SUM(\"net_weight\") AS
> \"net_weight1\"\n"
> + "FROM \"foodmart\".\"product\"\n"
> + "GROUP BY \"product_id\") AS \"t0\"";
> final String expectedPostgresql = "SELECT SUM(\"net_weight1\") AS
> \"net_weight_converted\"\n"
> + "FROM (SELECT \"product_id\", SUM(\"net_weight\") AS
> \"net_weight1\"\n"
> + "FROM \"foodmart\".\"product\"\n"
> + "GROUP BY \"product_id\") AS \"t0\"";
> sql(query)
> .dialect(DatabaseProduct.ORACLE.getDialect())
> .ok(expectedOracle)
> .dialect(DatabaseProduct.MYSQL.getDialect())
> .ok(expectedMySQL)
> .dialect(DatabaseProduct.VERTICA.getDialect())
> .ok(expectedVertica)
> .dialect(DatabaseProduct.POSTGRESQL.getDialect())
> .ok(expectedPostgresql);
> }
> {code}
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
