Fill Values for Missing Data from Database Using Apache Cassandra Database C++ Interface - MATLAB & Simulink

Fill Values for Missing Data from Database Using ApacheCassandraDatabase C++ Interface

When you import data from a Cassandra^®database into MATLAB^®using thepartitionReadorexecutecqlfunctions of the Apache Cassandra database C++ interface, these functions convert the fill values for missing data from the Cassandra column to the corresponding MATLAB values. This table identifies the data types in a Cassandra database column (Cassandra Query Language, or CQL, data type) and the corresponding fill value for missing data in the MATLAB table.

CQL Data Type	MATLAB Fill Value
`ascii`
`bigint`	`0`
`blob`	`[]`
`boolean`	`false`
`counter`	`0`
`date`	`NaT`
`decimal`
`double`	`NaN`
`float`	`NaN`
`inet`
`int`	`0`
`list<type>`	`[]`
`map<keyType,valueType>`	`0x2 table`(empty table)
`set<type>`	`[]`
`smallint`	`0`
`text`
`time`	`NaN`
`timestamp`	`NaT`
`timeuuid`
`tinyint`	`0`
`tuple<Type1,...,TypeN>`	`1xntable`, where the missing value in each variable is the MATLAB fill value for the corresponding CQL data type
user-defined type (UDT)	`1xntable`, where the missing value in each variable is the MATLAB fill value for the corresponding CQL data type
`uuid`
`varchar`
`varint`

Fill Values for Missing Data from Database Using ApacheCassandraDatabase C++ Interface

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