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Functions
- #c
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- [a:b]
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- A()
- A.( x )
- [a 1 ,…a n ]
- abs()
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- age()
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- ali_open()
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- T.alter( F i ,…; F’ i ,… )
- and()
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- z()
- zeros()
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- Intersection of sequences
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- Chart Elements
T.derive( A/cs,x:C,…;wi,… )
Description:
Add fields of a cluster composite table to a cluster memory table /cluster cursor according to the latter’s key values.
Syntax:
T.derive(A/cs,x:C,…;wi,...)
Note:
The function adds one or more fields of cluster composite table T to cluster memory table A or cluster cursor/multicursor cs according to key values of the latter.
Parameters:
|
T |
A composite table |
|
A/cs |
A cluster memory table /cluster cursor/cluster multicursor |
|
x |
Field value |
|
C |
Column alias |
|
wi |
Filtering condition; separate multiple conditions, which should be met at the same time, by comma(s) |
Return value:
A cluster cursor
Example:
|
|
A |
|
|
1 |
=file("emp1.ctx",["192.168.0.118:8281"]) |
|
|
2 |
=A1.open() |
Open a cluster table
|
|
3 |
=file("emp2.ctx",["192.168.0.151:8281"]).open().memory() |
Return a cluster memory table
|
|
4 |
=A2.derive(A3,DEPT,SALARY).fetch() |
Add fields of the cluster composite table to A3’s cluster memory table by the latter’s key values
|
|
5 |
=file("emp2.ctx",["192.168.0.151:8281"]).open().cursor() |
|
|
6 |
=A2.derive(A5,DEPT,SALARY).fetch() |
Add fields of the cluster composite table to A5’s cluster cursor by the latter’s key values
|
