Rick (while I am reading and trying DERBY-4415), that seems like there is no other way to use prod jars and yet stop the parser from binding?
Would it be at all possible to use the javacc compiler with sqlgrammar.jj (that are probably bundled in derby.jar) to do the work? Pavel. Rick Hillegas <richard.hille...@sun.com> Sent by: richard.hille...@sun.com 03/09/2010 01:13 PM Please respond to "Derby Discussion" <derby-user@db.apache.org> To Derby Discussion <derby-user@db.apache.org> cc Subject Re: Extracting dependencies from SQL statements Hi Pavel, You are right, the XmlTreeWalker class also tries to stop the compiler after parsing. This can only be done with a debug engine. The error you are seeing comes from the bind() phase of compilation. Derby is complaining that the query doesn't make sense: the objects it mentions don't exist. There's another issue linked from the XmlTreeWalker issue. Take a look at DERBY-4415. This is a slightly more involved solution but may get you closer. This solution assumes that you are trying to examine the various phases of the AST for a query against real objects in your database. This should work with the production jars. Hope this is more useful, -Rick Pavel Bortnovskiy wrote: > > Once again, Rick, thanks for your prompt response. To answer your > questions: > > (1) The compilation errors initially had to do with the SanityManager > and ContextId not available in prod jars. > > (2) Since I am trying to get this code to work in our application, > using debug jars may not be desirable. > More over, our app is using Derby's in-memory tables as well as its > NetworkServerController. > So, this parsing/tree-walking code should not conflict with the other > two uses. > > In the comments for DERBY-791, I did notice "We should provide some > mechanism for printing these trees in production (non-debug) servers". > So, I ran XmlTreeWalker linking only to > db-derby-10.5.3.0-bin/lib/derby.jar, but got the same exception: > > <?xml version="1.0" encoding="UTF-8"?> > <queryTree> > <queryText>select a from t, s where t.a = s.a</queryText> > Exception in thread "main" java.sql.SQLSyntaxErrorException: > Table/View 'T' does not exist. > at > org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown > Source) > at > org.apache.derby.impl.jdbc.Util.generateCsSQLException(Unknown Source) > at > org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(Unknown > Source) > at > org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(Unknown > Source) > at > org.apache.derby.impl.jdbc.EmbedConnection.handleException(Unknown > Source) > at > org.apache.derby.impl.jdbc.ConnectionChild.handleException(Unknown > Source) > at > org.apache.derby.impl.jdbc.EmbedPreparedStatement.<init>(Unknown Source) > at > org.apache.derby.impl.jdbc.EmbedPreparedStatement20.<init>(Unknown > Source) > at > org.apache.derby.impl.jdbc.EmbedPreparedStatement30.<init>(Unknown > Source) > at > org.apache.derby.impl.jdbc.EmbedPreparedStatement40.<init>(Unknown > Source) > at > org.apache.derby.jdbc.Driver40.newEmbedPreparedStatement(Unknown Source) > at > org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown > Source) > at > org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown > Source) > at XmlTreeWalker.execute(XmlTreeWalker.java:130) > at XmlTreeWalker.main(XmlTreeWalker.java:111) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) > > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > > at java.lang.reflect.Method.invoke(Method.java:597) > at > com.intellij.rt.execution.application.AppMain.main(AppMain.java:110) > Caused by: java.sql.SQLException: Table/View 'T' does not exist. > at > org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown > Source) > at > org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA(Unknown > Source) > ... 20 more > Caused by: ERROR 42X05: Table/View 'T' does not exist. > at > org.apache.derby.iapi.error.StandardException.newException(Unknown > Source) > at > org.apache.derby.impl.sql.compile.FromBaseTable.bindTableDescriptor(Unknown > Source) > at > org.apache.derby.impl.sql.compile.FromBaseTable.bindNonVTITables(Unknown > Source) > at > org.apache.derby.impl.sql.compile.FromList.bindTables(Unknown Source) > at > org.apache.derby.impl.sql.compile.SelectNode.bindNonVTITables(Unknown > Source) > at > org.apache.derby.impl.sql.compile.DMLStatementNode.bindTables(Unknown > Source) > at > org.apache.derby.impl.sql.compile.DMLStatementNode.bind(Unknown Source) > at > org.apache.derby.impl.sql.compile.CursorNode.bindStatement(Unknown > Source) > at > org.apache.derby.impl.sql.GenericStatement.prepMinion(Unknown Source) > at org.apache.derby.impl.sql.GenericStatement.prepare(Unknown > Source) > at > org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.prepareInternalStatement(Unknown > Source) > ... 14 more > > Regards, > Pavel. > > > > > > *Rick Hillegas <richard.hille...@sun.com>* > Sent by: richard.hille...@sun.com > > 03/09/2010 11:22 AM > Please respond to > "Derby Discussion" <derby-user@db.apache.org> > > > > To > Derby Discussion <derby-user@db.apache.org> > cc > > Subject > Re: Extracting dependencies from SQL statements > > > > > > > > > > Hi Pavel, > > These programs should be run using the Derby debug jars. I have edited > the introductory comment to try to make this clear. The debug logic must > be compiled into Derby in order for compilation to stop after parsing. > If you need a solution which runs against the production jars, take a > look at the related issue DERBY-791. > > Hope this helps, > -Rick > > Pavel Bortnovskiy wrote: > > > > I was able to compile both files by disabling SanityManager method > > invocation and replacing ContextId.LANG_CONNECTION with its string > > "LanguageConnectionContext". > > No other changes to ASTParser and TreeWalker have been done, however, > > when running them the following exception is thrown: > > > > Parsing: > > select a from t, s where t.a = s.a > > Exception in thread "main" java.sql.SQLSyntaxErrorException: > > Table/View 'T' does not exist. > > at > > > org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown > > Source) > > at > > org.apache.derby.impl.jdbc.Util.generateCsSQLException(Unknown Source) > > at > > > org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(Unknown > > > Source) > > at > > > org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(Unknown > > > Source) > > at > > org.apache.derby.impl.jdbc.EmbedConnection.handleException(Unknown > > Source) > > at > > org.apache.derby.impl.jdbc.ConnectionChild.handleException(Unknown > > Source) > > at > > org.apache.derby.impl.jdbc.EmbedPreparedStatement.<init>(Unknown Source) > > at > > org.apache.derby.impl.jdbc.EmbedPreparedStatement20.<init>(Unknown > > Source) > > at > > org.apache.derby.impl.jdbc.EmbedPreparedStatement30.<init>(Unknown > > Source) > > at > > org.apache.derby.impl.jdbc.EmbedPreparedStatement40.<init>(Unknown > > Source) > > at > > org.apache.derby.jdbc.Driver40.newEmbedPreparedStatement(Unknown Source) > > at > > org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown > > Source) > > at > > org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown > > Source) > > at TreeWalker.execute(TreeWalker.java:95) > > at TreeWalker.main(TreeWalker.java:79) > > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > > at > > > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) > > > > > at > > > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > > > > > at java.lang.reflect.Method.invoke(Method.java:597) > > at > > com.intellij.rt.execution.application.AppMain.main(AppMain.java:110) > > > > > > > > > > > > *Rick Hillegas <richard.hille...@sun.com>* > > Sent by: richard.hille...@sun.com > > > > 03/09/2010 08:35 AM > > Please respond to > > "Derby Discussion" <derby-user@db.apache.org> > > > > > > > > To > > Derby Discussion <derby-user@db.apache.org> > > cc > > > > Subject > > Re: Extracting dependencies from SQL statements > > > > > > > > > > > > > > > > > > > > Hi Pavel, > > > > I don't know of an easy way to do this. You could run the statement > > through the Derby parser to get the parsed representation, the Abstract > > Syntax Tree. Then you could write a Visitor to walk the AST, looking for > > the nodes which represent tables. See the following JIRAs for some > > pointers on how to produce and walk the AST: DERBY-3946 and DERBY-791. > > > > Unfortunately, there is no systematic primer on the AST nodes > > themselves. All we have is the javadoc for the package > > org.apache.derby.impl.sql.compile. > > > > Hope this helps, > > -Rick > > > > Pavel Bortnovskiy wrote: > > > > > > Hello: > > > > > > is it possible to use Derby's SQL parser to "extract" dependencies > > > from a given SQL statement? > > > (or access the parser once the statement has been parsed). > > > > > > Whether it's a simple SELECT or a JOIN, UNION or a more complex > > > statement, I would like to get a list of tables that this statement > > > would depend on. > > > Looking for FROM clauses and attempting to do the parsing myself seems > > > like a difficult, error prone and impractical way to approach this. > > > > > > Any suggestions, please? > > > > > > Thanks, > > > Pavel. > > > > > > > > > > > > Jefferies archives and monitors outgoing and incoming e-mail. The > > > contents of this email, including any attachments, are confidential to > > > the ordinary user of the email address to which it was addressed. 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