CQL: Identifiers and Keywords

Identifiers

Identifiers are alpha numeric strings, used to identify tables, columns and other objects. An identifier in CQL, must match to the regular expression ‘[a-zA-Z][a-zA-Z0-9_]*’.

Keywords

Keywords are subset of identifiers, which has special meaning in CQL.

Example

SELECT, UPDATE, WHERE, WITH are all keywords in cql.

Identifiers and keywords are case insensitive

Identifiers and keyword names are case insensitive.

For example,

a.   UPDATE, update, update are all same in CQL.

b.   firstName, firstname, FIRSTname are all same

Quoted Identifiers

Quoted identifiers are defined by enclosing the name in double quotes "". Quoted identifiers are case sensitive.

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