Merge pull request #2864 from NickPapatonis/Issue_2860

#2860 Add partition ranges to columnstore visualization

Author: BrentOzar

sp_BlitzIndex.sql

@@ -34,6 +34,7 @@ ALTER PROCEDURE dbo.sp_BlitzIndex
     @OutputTableName NVARCHAR(256) = NULL ,
 	@IncludeInactiveIndexes BIT = 0 /* Will skip indexes with no reads or writes */,
     @ShowAllMissingIndexRequests BIT = 0 /*Will make all missing index requests show up*/,
+	@ShowPartitionRanges BIT = 0 /* Will add partition range values column to columnstore visualization */,
 	@SortOrder NVARCHAR(50) = NULL, /* Only affects @Mode = 2. */
 	@SortDirection NVARCHAR(4) = 'DESC', /* Only affects @Mode = 2. */
     @Help TINYINT = 0,
@@ -126,6 +127,7 @@ DECLARE @LineFeed NVARCHAR(5);
 DECLARE @DaysUptimeInsertValue NVARCHAR(256);
 DECLARE @DatabaseToIgnore NVARCHAR(MAX);
 DECLARE @ColumnList NVARCHAR(MAX);
+DECLARE @PartitionCount INT;
 
 /* Let's get @SortOrder set to lower case here for comparisons later */
 SET @SortOrder = REPLACE(LOWER(@SortOrder), N' ', N'_');
@@ -2753,6 +2755,7 @@ BEGIN
 				SELECT @ColumnList = @ColumnList + column_name + N'', ''
 					FROM DistinctColumns
 					ORDER BY column_id;
+				SELECT @PartitionCount = COUNT(1) FROM ' + QUOTENAME(@DatabaseName) + N'.sys.partitions WHERE object_id = @ObjectID AND data_compression IN (3,4);
 				END';
 
 		IF @Debug = 1
@@ -2769,27 +2772,62 @@ BEGIN
 				PRINT SUBSTRING(@dsql, 36000, 40000);
 			END;
 
-        EXEC sp_executesql @dsql, N'@ObjectID INT, @ColumnList NVARCHAR(MAX) OUTPUT', @ObjectID, @ColumnList OUTPUT;
+        EXEC sp_executesql @dsql, N'@ObjectID INT, @ColumnList NVARCHAR(MAX) OUTPUT, @PartitionCount INT OUTPUT', @ObjectID, @ColumnList OUTPUT, @PartitionCount OUTPUT;
+
+		IF @PartitionCount < 2
+			SET @ShowPartitionRanges = 0;
 
 		IF @Debug = 1
-			SELECT @ColumnList AS ColumnstoreColumnList;
+			SELECT @ColumnList AS ColumnstoreColumnList, @PartitionCount AS PartitionCount, @ShowPartitionRanges AS ShowPartitionRanges;
 
 		IF @ColumnList <> ''
 		BEGIN
 			/* Remove the trailing comma */
 			SET @ColumnList = LEFT(@ColumnList, LEN(@ColumnList) - 1);
 
-			SET @dsql = N'USE ' + QUOTENAME(@DatabaseName) + N'; SELECT partition_number, row_group_id, total_rows, deleted_rows, ' + @ColumnList + N'
+			SET @dsql = N'USE ' + QUOTENAME(@DatabaseName) + N'; 
+				SELECT partition_number, '
+				+ CASE WHEN @ShowPartitionRanges = 1 THEN N' COALESCE(range_start_op + '' '' + range_start + '' '', '''') + COALESCE(range_end_op + '' '' + range_end, '''') AS partition_range, ' ELSE N' ' END
+				+ N' row_group_id, total_rows, deleted_rows, ' 
+				+ @ColumnList
+				+ CASE WHEN @ShowPartitionRanges = 1 THEN N'
 				FROM (
-					SELECT c.name AS column_name, p.partition_number,
-						rg.row_group_id, rg.total_rows, rg.deleted_rows,
-						details = CAST(seg.min_data_id AS VARCHAR(20)) + '' to '' + CAST(seg.max_data_id AS VARCHAR(20)) + '', '' + CAST(CAST((seg.on_disk_size / 1024.0 / 1024) AS DECIMAL(18,0)) AS VARCHAR(20)) + '' MB''
-					FROM ' + QUOTENAME(@DatabaseName) + N'.sys.column_store_row_groups rg 
-					INNER JOIN ' + QUOTENAME(@DatabaseName) + N'.sys.columns c ON rg.object_id = c.object_id
-					INNER JOIN ' + QUOTENAME(@DatabaseName) + N'.sys.partitions p ON rg.object_id = p.object_id AND rg.partition_number = p.partition_number
-                    INNER JOIN ' + QUOTENAME(@DatabaseName) + N'.sys.index_columns ic on ic.column_id = c.column_id AND ic.object_id = c.object_id AND ic.index_id = p.index_id
-					LEFT OUTER JOIN ' + QUOTENAME(@DatabaseName) + N'.sys.column_store_segments seg ON p.partition_id = seg.partition_id AND ic.index_column_id = seg.column_id AND rg.row_group_id = seg.segment_id
-					WHERE rg.object_id = @ObjectID
+					SELECT column_name, partition_number, row_group_id, total_rows, deleted_rows, details,
+						range_start_op,
+						CASE
+							WHEN format_type IS NULL THEN CAST(range_start_value AS NVARCHAR(4000))
+							ELSE CONVERT(NVARCHAR(4000), range_start_value, format_type) END range_start,
+						range_end_op,
+						CASE
+							WHEN format_type IS NULL THEN CAST(range_end_value AS NVARCHAR(4000))
+							ELSE CONVERT(NVARCHAR(4000), range_end_value, format_type) END range_end' ELSE N' ' END + N'
+					FROM (
+						SELECT c.name AS column_name, p.partition_number, rg.row_group_id, rg.total_rows, rg.deleted_rows,
+							details = CAST(seg.min_data_id AS VARCHAR(20)) + '' to '' + CAST(seg.max_data_id AS VARCHAR(20)) + '', '' + CAST(CAST((seg.on_disk_size / 1024.0 / 1024) AS DECIMAL(18,0)) AS VARCHAR(20)) + '' MB''' 
+							+ CASE WHEN @ShowPartitionRanges = 1 THEN N',
+							CASE
+								WHEN pp.system_type_id IN (40, 41, 42, 43, 58, 61) THEN 126
+								WHEN pp.system_type_id IN (59, 62) THEN 3
+								WHEN pp.system_type_id IN (60, 122) THEN 2
+								ELSE NULL END format_type,
+							CASE WHEN pf.boundary_value_on_right = 0 THEN ''>'' ELSE ''>='' END range_start_op,
+							prvs.value range_start_value,
+							CASE WHEN pf.boundary_value_on_right = 0 THEN ''<='' ELSE ''<'' END range_end_op,
+							prve.value range_end_value ' ELSE N' ' END + N'
+						FROM ' + QUOTENAME(@DatabaseName) + N'.sys.column_store_row_groups rg 
+						INNER JOIN ' + QUOTENAME(@DatabaseName) + N'.sys.columns c ON rg.object_id = c.object_id
+						INNER JOIN ' + QUOTENAME(@DatabaseName) + N'.sys.partitions p ON rg.object_id = p.object_id AND rg.partition_number = p.partition_number
+						INNER JOIN ' + QUOTENAME(@DatabaseName) + N'.sys.index_columns ic on ic.column_id = c.column_id AND ic.object_id = c.object_id AND ic.index_id = p.index_id ' + CASE WHEN @ShowPartitionRanges = 1 THEN N' 
+						LEFT OUTER JOIN ' + QUOTENAME(@DatabaseName) + N'.sys.indexes i ON i.object_id = rg.object_id AND i.index_id = rg.index_id
+						LEFT OUTER JOIN ' + QUOTENAME(@DatabaseName) + N'.sys.partition_schemes ps ON ps.data_space_id = i.data_space_id
+						LEFT OUTER JOIN ' + QUOTENAME(@DatabaseName) + N'.sys.partition_functions pf ON pf.function_id = ps.function_id
+						LEFT OUTER JOIN ' + QUOTENAME(@DatabaseName) + N'.sys.partition_parameters pp ON pp.function_id = pf.function_id
+						LEFT OUTER JOIN ' + QUOTENAME(@DatabaseName) + N'.sys.partition_range_values prvs ON prvs.function_id = pf.function_id AND prvs.boundary_id = p.partition_number - 1
+						LEFT OUTER JOIN ' + QUOTENAME(@DatabaseName) + N'.sys.partition_range_values prve ON prve.function_id = pf.function_id AND prve.boundary_id = p.partition_number ' ELSE N' ' END 
+						+ N' LEFT OUTER JOIN ' + QUOTENAME(@DatabaseName) + N'.sys.column_store_segments seg ON p.partition_id = seg.partition_id AND ic.index_column_id = seg.column_id AND rg.row_group_id = seg.segment_id
+						WHERE rg.object_id = @ObjectID' 
+						+ CASE WHEN @ShowPartitionRanges = 1 THEN N'
+					) AS y ' ELSE N' ' END + N'
 				) AS x
 				PIVOT (MAX(details) FOR column_name IN ( ' + @ColumnList + N')) AS pivot1
 				ORDER BY partition_number, row_group_id;';