I am using ANTLR3.1 for developing a SQL parser
One of my main rule looks like this
sql_statement:
sql_statement_command (';')?
But when generating parser codes from grammar file to C source, it always take
a very long time and consume as much as 5G memory because of the optional
semicolon
Then in order to make the development easier, I make the semicolon a mandatory
by removing the question mark, like this
sql_statement:
sql_statement_command ';'
It does make the building faster and require much less memory.
But the problem now is, when parsing a statement without the semicolon, such as
the following
select * from tt
ANTLR won't handle this but issue a signal 11
His is the stack information when this happening, when all test has been
matched and is going to match the last semicolon
Program received signal SIGSEGV, Segmentation fault.
0xb7370a09 in getMissingSymbol () from /home/oracle/install/lib/libantlr3c.so
(gdb) where
#0 0xb7370a09 in getMissingSymbol ()
from /home/oracle/install/lib/libantlr3c.so
#1 0xb73701d0 in recoverFromMismatchedToken ()
from /home/oracle/install/lib/libantlr3c.so
#2 0xb736f7bb in match () from /home/oracle/install/lib/libantlr3c.so
In my opinion, ANTLR should initialize an exception that can be processed by
his own way, not issue this signal
Anyone has any ideas of suggestions on this?
Thanks a lot
==============================
Regards,
Ronghui Yu
Sierra Atlantic
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