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Get Table From Key

Description

This functor retrieves the sub-table corresponding to the given chain of keys from a given input table.

Inputs

Name Type Description
Table Table The input table.
Keys Tuple Chain of keys identifying the sub-table that will be retrieved.

Outputs

Name Type Description
Result Table The resulting sub-table.

Group

Table

Notes

This functor retrives all elements corresponding to the given tuple of keys in the input table. For example, given the table below

Key1* Key2* Key3* Value1 Value2 Value3
1 “a” 11 12 “bbbb” 23
1 “b” 22 12 “cccc” 23
2 “a” 11 12 “bbbb” 14
2 “a” 22 12 “aaaa” 23
2 “d” 22 12 “dddd” 12

retrieving the sub-table corresponding to the tuple of keys <2, “a”>

Key1* Key2* Key3* Value1 Value2 Value3
1 “a” 11 12 “bbbb” 23
1 “b” 22 12 “cccc” 23
2 “a” 11 12 “bbbb” 14
2 “a” 22 12 “aaaa” 23
2 “d” 22 12 “dddd”

yelds

Key3* Value1 Value2 Value3
11 12 “bbbb” 14
22 12 “aaaa” 23

and retriving the sub-table corresponding to the tuple of keys <2>:

Key1* Key2* Key3* Value1 Value2 Value3
1 “a” 11 12 “bbbb” 23
1 “b” 22 12 “cccc” 23
2 “a” 11 12 “bbbb” 14
2 “a” 22 12 “aaaa” 23
2 “d” 22 12 “dddd” 12

yelds

Key2* Key3* Value1 Value2 Value3
“a” 11 12 “bbbb” 14
“a” 22 12 “aaaa” 23
“d” 22 12 “dddd” 12

If the resulting sub-table does not have at least one column of keys or if the given tuple of keys is not present in the input table, an error is reported.

Internal Name

GetTableFromKey