public ASTNode preAnalyze()

in core/src/main/java/org/apache/hcatalog/cli/SemanticAnalysis/HCatSemanticAnalyzer.java [59:154]
69 lines of code
52 McCabe index (conditional complexity)

    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_ALTERPARTS_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.");

        }
    }