@Override
public ASTNode preAnalyze(HiveSemanticAnalyzerHookContext context, ASTNode ast)
throws SemanticException {
this.ast = ast;
switch (ast.getToken().getType()) {
// HCat wants to intercept following tokens and special-handle them.
case HiveParser.TOK_CREATETABLE:
hook = new CreateTableHook();
return hook.preAnalyze(context, ast);
case HiveParser.TOK_CREATEDATABASE:
hook = new CreateDatabaseHook();
return hook.preAnalyze(context, ast);
case HiveParser.TOK_ALTERTABLE_PARTITION:
if (((ASTNode) ast.getChild(1)).getToken().getType()
== HiveParser.TOK_ALTERTABLE_FILEFORMAT) {
return ast;
} else if (((ASTNode) ast.getChild(1)).getToken().getType()
== HiveParser.TOK_ALTERTABLE_MERGEFILES) {
// unsupported
throw new SemanticException("Operation not supported.");
} else {
return ast;
}
// HCat will allow these operations to be performed.
// Database DDL
case HiveParser.TOK_SHOWDATABASES:
case HiveParser.TOK_DROPDATABASE:
case HiveParser.TOK_SWITCHDATABASE:
case HiveParser.TOK_DESCDATABASE:
case HiveParser.TOK_ALTERDATABASE_PROPERTIES:
// Index DDL
case HiveParser.TOK_ALTERINDEX_PROPERTIES:
case HiveParser.TOK_CREATEINDEX:
case HiveParser.TOK_DROPINDEX:
case HiveParser.TOK_SHOWINDEXES:
// View DDL
// "alter view add partition" does not work because of the nature of implementation
// of the DDL in hive. Hive will internally invoke another Driver on the select statement,
// and HCat does not let "select" statement through. I cannot find a way to get around it
// without modifying hive code. So just leave it unsupported.
// case HiveParser.TOK_ALTERVIEW_ADDPARTS:
case HiveParser.TOK_ALTERVIEW_DROPPARTS:
case HiveParser.TOK_ALTERVIEW_PROPERTIES:
case HiveParser.TOK_ALTERVIEW_RENAME:
case HiveParser.TOK_CREATEVIEW:
case HiveParser.TOK_DROPVIEW:
// Authorization DDL
case HiveParser.TOK_CREATEROLE:
case HiveParser.TOK_DROPROLE:
case HiveParser.TOK_GRANT_ROLE:
case HiveParser.TOK_GRANT_WITH_OPTION:
case HiveParser.TOK_GRANT:
case HiveParser.TOK_REVOKE_ROLE:
case HiveParser.TOK_REVOKE:
case HiveParser.TOK_SHOW_GRANT:
case HiveParser.TOK_SHOW_ROLE_GRANT:
// Misc DDL
case HiveParser.TOK_LOCKTABLE:
case HiveParser.TOK_UNLOCKTABLE:
case HiveParser.TOK_SHOWLOCKS:
case HiveParser.TOK_DESCFUNCTION:
case HiveParser.TOK_SHOWFUNCTIONS:
case HiveParser.TOK_EXPLAIN:
// Table DDL
case HiveParser.TOK_ALTERTABLE_ADDPARTS:
case HiveParser.TOK_ALTERTABLE_ADDCOLS:
case HiveParser.TOK_ALTERTABLE_CHANGECOL_AFTER_POSITION:
case HiveParser.TOK_ALTERTABLE_SERDEPROPERTIES:
case HiveParser.TOK_ALTERTABLE_CLUSTER_SORT:
case HiveParser.TOK_ALTERTABLE_DROPPARTS:
case HiveParser.TOK_ALTERTABLE_PROPERTIES:
case HiveParser.TOK_ALTERTABLE_RENAME:
case HiveParser.TOK_ALTERTABLE_RENAMECOL:
case HiveParser.TOK_ALTERTABLE_REPLACECOLS:
case HiveParser.TOK_ALTERTABLE_SERIALIZER:
case HiveParser.TOK_ALTERTABLE_TOUCH:
case HiveParser.TOK_DESCTABLE:
case HiveParser.TOK_DROPTABLE:
case HiveParser.TOK_SHOW_TABLESTATUS:
case HiveParser.TOK_SHOWPARTITIONS:
case HiveParser.TOK_SHOWTABLES:
return ast;
// In all other cases, throw an exception. Its a white-list of allowed operations.
default:
throw new SemanticException("Operation not supported.");
}
}
@Override
public void postAnalyze(
HiveSemanticAnalyzerHookContext context, List<Task<? extends Serializable>> rootTasks)
throws SemanticException {
try {
switch (ast.getToken().getType()) {
case HiveParser.TOK_CREATETABLE:
case HiveParser.TOK_CREATEDATABASE:
case HiveParser.TOK_ALTERTABLE_PARTITION:
// HCat will allow these operations to be performed.
// Database DDL
case HiveParser.TOK_SHOWDATABASES:
case HiveParser.TOK_DROPDATABASE:
case HiveParser.TOK_SWITCHDATABASE:
case HiveParser.TOK_DESCDATABASE:
case HiveParser.TOK_ALTERDATABASE_PROPERTIES:
// Index DDL
case HiveParser.TOK_ALTERINDEX_PROPERTIES:
case HiveParser.TOK_CREATEINDEX:
case HiveParser.TOK_DROPINDEX:
case HiveParser.TOK_SHOWINDEXES:
// View DDL
// case HiveParser.TOK_ALTERVIEW_ADDPARTS:
case HiveParser.TOK_ALTERVIEW_DROPPARTS:
case HiveParser.TOK_ALTERVIEW_PROPERTIES:
case HiveParser.TOK_ALTERVIEW_RENAME:
case HiveParser.TOK_CREATEVIEW:
case HiveParser.TOK_DROPVIEW:
// Authorization DDL
case HiveParser.TOK_CREATEROLE:
case HiveParser.TOK_DROPROLE:
case HiveParser.TOK_GRANT_ROLE:
case HiveParser.TOK_GRANT_WITH_OPTION:
case HiveParser.TOK_GRANT:
case HiveParser.TOK_REVOKE_ROLE:
case HiveParser.TOK_REVOKE:
case HiveParser.TOK_SHOW_GRANT:
case HiveParser.TOK_SHOW_ROLE_GRANT:
// Misc DDL
case HiveParser.TOK_LOCKTABLE:
case HiveParser.TOK_UNLOCKTABLE:
case HiveParser.TOK_SHOWLOCKS:
case HiveParser.TOK_DESCFUNCTION:
case HiveParser.TOK_SHOWFUNCTIONS:
case HiveParser.TOK_EXPLAIN:
// Table DDL
case HiveParser.TOK_ALTERTABLE_ADDPARTS:
case HiveParser.TOK_ALTERTABLE_ADDCOLS:
case HiveParser.TOK_ALTERTABLE_CHANGECOL_AFTER_POSITION:
case HiveParser.TOK_ALTERTABLE_SERDEPROPERTIES:
case HiveParser.TOK_ALTERTABLE_CLUSTER_SORT:
case HiveParser.TOK_ALTERTABLE_DROPPARTS:
case HiveParser.TOK_ALTERTABLE_PROPERTIES:
case HiveParser.TOK_ALTERTABLE_RENAME:
case HiveParser.TOK_ALTERTABLE_RENAMECOL:
case HiveParser.TOK_ALTERTABLE_REPLACECOLS:
case HiveParser.TOK_ALTERTABLE_SERIALIZER:
case HiveParser.TOK_ALTERTABLE_TOUCH:
case HiveParser.TOK_DESCTABLE:
case HiveParser.TOK_DROPTABLE:
case HiveParser.TOK_SHOW_TABLESTATUS:
case HiveParser.TOK_SHOWPARTITIONS:
case HiveParser.TOK_SHOWTABLES:
break;
default:
throw new HCatException(
ErrorType.ERROR_INTERNAL_EXCEPTION, "Unexpected token: " + ast.getToken());
}
authorizeDDL(context, rootTasks);
} catch (HCatException e) {
throw new SemanticException(e);
} catch (HiveException e) {
throw new SemanticException(e);
}
if (hook != null) {
hook.postAnalyze(context, rootTasks);
}
}