вот план запроса. Академики, подкиньте, пожалуйста, идейку, где копать???
|--Bookmark Lookup(BOOKMARK: ([Bmk1001]), OBJECT: ([TorgSB_N].[dbo].[_1SJOURN] AS [J])) 1 4 3 Bookmark Lookup Bookmark Lookup BOOKMARK: ([Bmk1001]), OBJECT: ([TorgSB_N].[dbo].[_1SJOURN] AS [J]) [J].[IDDOCDEF], [J].[DATE_TIME_IDDOC] 1.0 6.2500001E-3 0.0000011 300 0.03251927 [RegP].[SP2654], [RegP].[SP1131], [RegP].[SP1132], [RegP].[SP2706], [RegP].[SP2707], [RegP].[SP3597], [RegP].[SP3601], [RegP].[SP1133], [RegP].[SP2655], [RegP].[SP2799], [RegP].[SP3286], [RegP].[SP3665], [J].[IDDOCDEF], [J].[DATE_TIME_IDDOC] [NULL] PLAN_ROW 0 1.0
|--Nested Loops(Left Outer Join, OUTER REFERENCES: ([RegP].[SP1132])) 1 5 4 Nested Loops Left Outer Join OUTER REFERENCES: ([RegP].[SP1132]) [NULL] 1.0 0.0 0.00001254 205 2.6268167E-2 [RegP].[SP2654], [RegP].[SP1131], [RegP].[SP1132], [RegP].[SP2706], [RegP].[SP2707], [RegP].[SP3597], [RegP].[SP3601], [RegP].[SP1133], [RegP].[SP2655], [RegP].[SP2799], [RegP].[SP3286], [RegP].[SP3665], [Bmk1001] [NULL] PLAN_ROW 0 1.0
|--Nested Loops(Left Semi Join, WHERE: ([RegP].[SP1131]=[Doc].[SP249])) 1 6 5 Nested Loops Left Semi Join WHERE: ([RegP].[SP1131]=[Doc].[SP249]) [NULL] 1.0 0.0 2.7815544E-4 175 0.01335981 [RegP].[SP2654], [RegP].[SP1131], [RegP].[SP1132], [RegP].[SP2706], [RegP].[SP2707], [RegP].[SP3597], [RegP].[SP3601], [RegP].[SP1133], [RegP].[SP2655], [RegP].[SP2799], [RegP].[SP3286], [RegP].[SP3665] [NULL] PLAN_ROW 0 1.0
| |--Clustered Index Seek(OBJECT: ([TorgSB_N].[dbo].[RG1130].[PK_RG1130] AS [RegP]), SEEK: ([RegP].[PERIOD]='Apr 1 2008 12:00AM'), WHERE: ([RegP].[SP1133]>0.00000) ORDERED FORWARD) 1 7 6 Clustered Index Seek Clustered Index Seek OBJECT: ([TorgSB_N].[dbo].[RG1130].[PK_RG1130] AS [RegP]), SEEK: ([RegP].[PERIOD]='Apr 1 2008 12:00AM'), WHERE: ([RegP].[SP1133]>0.00000) ORDERED FORWARD [RegP].[SP2654], [RegP].[SP1131], [RegP].[SP1132], [RegP].[SP2706], [RegP].[SP2707], [RegP].[SP3597], [RegP].[SP3601], [RegP].[SP1133], [RegP].[SP2655], [RegP].[SP2799], [RegP].[SP3286], [RegP].[SP3665] 1.0 6.3284999E-3 8.0320715E-5 175 6.4088209E-3 [RegP].[SP2654], [RegP].[SP1131], [RegP].[SP1132], [RegP].[SP2706], [RegP].[SP2707], [RegP].[SP3597], [RegP].[SP3601], [RegP].[SP1133], [RegP].[SP2655], [RegP].[SP2799], [RegP].[SP3286], [RegP].[SP3665] [NULL] PLAN_ROW 0 1.0
| |--Clustered Index Seek(OBJECT: ([TorgSB_N].[dbo].[DT239].[PK_DT239] AS [Doc]), SEEK: ([Doc].[IDDOC]=' D4D2CEE') ORDERED FORWARD) 1 8 6 Clustered Index Seek Clustered Index Seek OBJECT: ([TorgSB_N].[dbo].[DT239].[PK_DT239] AS [Doc]), SEEK: ([Doc].[IDDOC]=' D4D2CEE') ORDERED FORWARD [Doc].[SP249] 26.617744 6.3284999E-3 1.0785937E-4 62 6.6520781E-3 [Doc].[SP249] [NULL] PLAN_ROW 0 3.0
|--Index Seek(OBJECT: ([TorgSB_N].[dbo].[_1SJOURN].[IDDOC] AS [J]), SEEK: ([J].[IDDOC]=right(Convert([RegP].[SP1132]), 9)) ORDERED FORWARD) 1 12 5 Index Seek Index Seek OBJECT: ([TorgSB_N].[dbo].[_1SJOURN].[IDDOC] AS [J]), SEEK: ([J].[IDDOC]=right(Convert([RegP].[SP1132]), 9)) ORDERED FORWARD [Bmk1001] 1.0 6.3284999E-3 7.9605998E-5 38 1.2895818E-2 [Bmk1001] [NULL] PLAN_ROW 0 3.0