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1. Preface
2. Introduction to Transformations
3. Transformation Ports
4. Transformation Caches
6. Aggregator Transformation
7. Association Transformation
9. Case Converter Transformation
10. Classifier Transformation
11. Comparison Transformation
12. Consolidation Transformation
14. Data Processor Transformation
15. Decision Transformation
16. Duplicate Record Exception Transformation
17. Expression Transformation
18. Filter Transformation
19. Hierarchical to Relational Transformation
20. Java Transformation
21. Java Transformation API Reference
22. Java Expressions
23. Joiner Transformation
24. Key Generator Transformation
25. Labeler Transformation
26. Lookup Transformation
27. Lookup Caches
28. Dynamic Lookup Cache
29. Macro Transformation
30. Match Transformation
31. Match Transformations in Field Analysis
32. Match Transformations in Identity Analysis
33. Normalizer Transformation
34. Merge Transformation
35. Parser Transformation
36. Python Transformation
37. Rank Transformation
39. Relational to Hierarchical Transformation
40. REST Web Service Consumer Transformation
41. Router Transformation
42. Sequence Generator Transformation
43. Sorter Transformation
44. SQL Transformation
45. Standardizer Transformation
46. Union Transformation
47. Update Strategy Transformation
48. Web Service Consumer Transformation
49. Parsing Web Service SOAP Messages
50. Generating Web Service SOAP Messages
51. Weighted Average Transformation
52. Window Transformation
53. Write Transformation
54. Appendix A: Transformation Delimiters

# Frame

The frame determines which rows are included in the calculation for the current input row, based on their relative position to the current row.
If you use an aggregate function instead of LEAD or LAG, you must specify a window frame. LEAD and LAG reference individual row sand ignore the frame specification.
The start offset and end offset describe the number of rows that appear before and after the current input row. An offset of "0" represents the current input row. For example, a start offset of -3 and an end offset of 0 describes a frame including the current input row and the three rows before the current row.
The following image shows a frame with a start offset of -1 and an end offset of 1:
For every input row, the function performs an aggregate operation on the rows inside the frame. If you configure an aggregate expression like SUM with the preceding frame, the expression calculates the sum of the values within the frame and returns a value of 6000 for the input row.
You can also specify a frame that does not include the current input row. For example, a start offset of 10 and an end offset of 15 describes a frame that includes six total rows, from the tenth to the fifteenth row after the current row.
The start offset must be less than or equal to the end offset.
Offsets of
All Rows Preceding
and
All Rows Following
represent the first row of the partition and the last row of the partition. For example, if the start offset is All Rows Preceding and the end offset is -1, the frame includes one row before the current row and all rows before that.
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