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[#4292] Fix empty GROUP BY () for Derby

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This commit is contained in:
lukaseder 2015-05-30 09:49:48 +02:00
parent 1fc179ce61
commit 117e441d12
1 changed files with 11 additions and 6 deletions
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17
jOOQ/src/main/java/org/jooq/impl/SelectQueryImpl.java
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@ -1091,15 +1091,20 @@ class SelectQueryImpl<R extends Record> extends AbstractResultQuery<R> implement
if (getGroupBy().isEmpty()) {
// [#1681] Use the constant field from the dummy table Sybase ASE, Ingres
if (asList().contains(dialect)) {
if (asList().contains(family)) {
context.sql("empty_grouping_dummy_table.dual");
}
// Some dialects don't support empty GROUP BY () clauses
else if (asList(CUBRID, DERBY, FIREBIRD, HSQLDB, MARIADB, MYSQL, POSTGRES, SQLITE).contains(dialect)) {
context.sql('(')
.visit(DSL.select(one()))
.sql(')');
// [#4292] Some dialects accept constant expressions in GROUP BY
// Note that dialects may consider constants as indexed field
// references, as in the ORDER BY clause!
else if (asList(DERBY).contains(family)) {
context.sql('0');
}
// [#4292] Some dialects don't support empty GROUP BY () clauses
else if (asList(CUBRID, FIREBIRD, HSQLDB, MARIADB, MYSQL, POSTGRES, SQLITE).contains(family)) {
context.sql('(').visit(DSL.select(one())).sql(')');
}
// Few dialects support the SQL standard "grand total" (i.e. empty grouping set)