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README
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README
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*** README - toySQL ***
Last update - 8th Mar 2018.
I've decided to go with ANTLR4 to take toySQL further.
It will make things a lot easier.
Acknowledgement - A big "thanks" to Github users bkiers (who
wrote "tiny-language-antlr4") and "mateiw" (who wrote
"littlebasic"). I will be using grammar code from both of
those projects. It will be very useful as I build up the
toySQL grammar.
Thanks to both of you for writing those apps and for
releasing them as "public domain"!
***************************
To compile - enter the toySQL directory and
type these commands -
$ antlr4 toySQL.g4
$ javac toySQL*.java
$ grun toySQL stmt -gui
( You might get a warning here -
"Warning: TestRig moved to org.antlr.v4.gui.TestRig; calling automatically"
Ignore it. )
Type a SQL "select" statement like one of the following -
select foo, bar ,baz from mytable where bar <= 42;
select foo, 42 as answer, baz as whatever from mytable;
select foo, "test" as mystring, bar from mytable where foo == "hi" and bar != 10;
Press ENTER then Ctrl-D. The Parse Tree Inspector should appear.
***************************
I still need to add the "case" clause, the "in" statement
and joins to the grammar.
This is (of course) "public domain".
"Share and enjoy"....... :)
- mooseman