FrameQL is a Declearative language that takes SQL-ish language to perform video analytic

A valid FrameQL program is a frameQLstatements. frameQL statements will consists of multiple frameQL statement. Each frameQLstatement can be either ddlStatement or dmlStatement, *** transactionStatement*** Since FrameQL will be used mainly for video exploratory purpose, we will focus on dmlStatement, specifically, selectStatement.

A selectStatement will contain querySpecification that starts with SELECT.

Each querySepcification will take the form of of:

     SELECT ***selectSpec*** ***selectElements***
    ***fromClause***  ***errorTolerenceExpression*** ***confLevelExpression***

Where selectSpec can be empty or DISTINCT.

selectElements is a list of attribltes from the table returned in fromClause

fromClause will take the form of

FROM tableSources WHERE (expressions)

We built a grammar using ANTLR

antlr4 -Dlanguage=Python3 *.g4 -o ../build

Go to ../build and execute:

in build, run:

grun frameQL root -gui

It will ask for inputs in the command prompt

Or we can provide input txt file via:

grun frameQL root -gui query.txt

In the end, grun will output the parse tree

Just export CLASSPATH

export CLASSPATH=".:/usr/local/lib/antlr-4.7.1-complete.jar:$CLASSPATH"