init - add project files

tools/jet-2.12.0/internal/jet/group_by_clause.go

@@ -0,0 +1,41 @@
+package jet
+
+// GroupByClause interface
+type GroupByClause interface {
+	serializeForGroupBy(statement StatementType, out *SQLBuilder)
+}
+
+// GROUPING_SETS operator allows grouping of the rows in a table by multiple sets of columns in a single query.
+// This can be useful when we want to analyze data by different combinations of columns, without having to write separate
+// queries for each combination.
+func GROUPING_SETS(expressions ...Expression) GroupByClause {
+	return Func("GROUPING SETS", expressions...)
+}
+
+// ROLLUP operator is used with the GROUP BY clause to generate all prefixes of a group of columns including the empty list.
+// It creates extra rows in the result set that represent the subtotal values for each combination of columns.
+func ROLLUP(expressions ...Expression) GroupByClause {
+	return Func("ROLLUP", expressions...)
+}
+
+// CUBE operator is used with the GROUP BY clause to generate subtotals for all possible combinations of a group of columns.
+// It creates extra rows in the result set that represent the subtotal values for each combination of columns.
+func CUBE(expressions ...Expression) GroupByClause {
+	return Func("CUBE", expressions...)
+}
+
+// GROUPING function is used to identify which columns are included in a grouping set or a subtotal row. It takes as input
+// the name of a column and returns 1 if the column is not included in the current grouping set, and 0 otherwise.
+// It can be also used with multiple parameters to check if a set of columns is included in the current grouping set. The result
+// of the GROUPING function would then be an integer bit mask having 1’s for the arguments which have GROUPING(argument) as 1.
+func GROUPING(expressions ...Expression) IntegerExpression {
+	return IntExp(Func("GROUPING", expressions...))
+}
+
+// WITH_ROLLUP operator is used with the GROUP BY clause to generate all prefixes of a group of columns including the empty list.
+// It creates extra rows in the result set that represent the subtotal values for each combination of columns.
+func WITH_ROLLUP(expressions ...Expression) GroupByClause {
+	return CustomExpression(
+		parametersSerializer(expressions), Token("WITH ROLLUP"),
+	)
+}