Examples with DDLDropIndexStatement com.alibaba.cobar.parser.ast.stmt.ddl.DDLDropIndexStatement used on opensource projects

Example 1 with DDLDropIndexStatement

use of com.alibaba.cobar.parser.ast.stmt.ddl.DDLDropIndexStatement in project cobar by alibaba.

the class MySQLDDLParser method ddlStmt.

/**
     * nothing has been pre-consumed
     */
public DDLStatement ddlStmt() throws SQLSyntaxErrorException {
    Identifier idTemp1;
    Identifier idTemp2;
    SpecialIdentifier siTemp;
    switch(lexer.token()) {
        case KW_ALTER:
            boolean ignore = false;
            if (lexer.nextToken() == KW_IGNORE) {
                ignore = true;
                lexer.nextToken();
            }
            switch(lexer.token()) {
                case KW_TABLE:
                    lexer.nextToken();
                    idTemp1 = identifier();
                    DDLAlterTableStatement alterTableStatement = new DDLAlterTableStatement(ignore, idTemp1);
                    return alterTable(alterTableStatement);
                default:
                    throw err("Only ALTER TABLE is supported");
            }
        case KW_CREATE:
            switch(lexer.nextToken()) {
                case KW_UNIQUE:
                case KW_FULLTEXT:
                case KW_SPATIAL:
                    lexer.nextToken();
                case KW_INDEX:
                    lexer.nextToken();
                    idTemp1 = identifier();
                    for (; lexer.token() != KW_ON; lexer.nextToken()) ;
                    lexer.nextToken();
                    idTemp2 = identifier();
                    return new DDLCreateIndexStatement(idTemp1, idTemp2);
                case KW_TABLE:
                    lexer.nextToken();
                    return createTable(false);
                case IDENTIFIER:
                    siTemp = specialIdentifiers.get(lexer.stringValueUppercase());
                    if (siTemp != null) {
                        switch(siTemp) {
                            case TEMPORARY:
                                lexer.nextToken();
                                match(KW_TABLE);
                                return createTable(true);
                            case POLICY:
                                lexer.nextToken();
                                Identifier policyName = identifier();
                                match(PUNC_LEFT_PAREN);
                                ExtDDLCreatePolicy policy = new ExtDDLCreatePolicy(policyName);
                                for (int j = 0; lexer.token() != PUNC_RIGHT_PAREN; ++j) {
                                    if (j > 0) {
                                        match(PUNC_COMMA);
                                    }
                                    Integer id = lexer.integerValue().intValue();
                                    match(LITERAL_NUM_PURE_DIGIT);
                                    Expression val = exprParser.expression();
                                    policy.addProportion(id, val);
                                }
                                match(PUNC_RIGHT_PAREN);
                                return policy;
                        }
                    }
                default:
                    throw err("unsupported DDL for CREATE");
            }
        case KW_DROP:
            switch(lexer.nextToken()) {
                case KW_INDEX:
                    lexer.nextToken();
                    idTemp1 = identifier();
                    match(KW_ON);
                    idTemp2 = identifier();
                    return new DDLDropIndexStatement(idTemp1, idTemp2);
                case KW_TABLE:
                    lexer.nextToken();
                    return dropTable(false);
                case IDENTIFIER:
                    siTemp = specialIdentifiers.get(lexer.stringValueUppercase());
                    if (siTemp != null) {
                        switch(siTemp) {
                            case TEMPORARY:
                                lexer.nextToken();
                                match(KW_TABLE);
                                return dropTable(true);
                            case POLICY:
                                lexer.nextToken();
                                Identifier policyName = identifier();
                                return new ExtDDLDropPolicy(policyName);
                        }
                    }
                default:
                    throw err("unsupported DDL for DROP");
            }
        case KW_RENAME:
            lexer.nextToken();
            match(KW_TABLE);
            idTemp1 = identifier();
            match(KW_TO);
            idTemp2 = identifier();
            List<Pair<Identifier, Identifier>> list;
            if (lexer.token() != PUNC_COMMA) {
                list = new ArrayList<Pair<Identifier, Identifier>>(1);
                list.add(new Pair<Identifier, Identifier>(idTemp1, idTemp2));
                return new DDLRenameTableStatement(list);
            }
            list = new LinkedList<Pair<Identifier, Identifier>>();
            list.add(new Pair<Identifier, Identifier>(idTemp1, idTemp2));
            for (; lexer.token() == PUNC_COMMA; ) {
                lexer.nextToken();
                idTemp1 = identifier();
                match(KW_TO);
                idTemp2 = identifier();
                list.add(new Pair<Identifier, Identifier>(idTemp1, idTemp2));
            }
            return new DDLRenameTableStatement(list);
        case IDENTIFIER:
            SpecialIdentifier si = specialIdentifiers.get(lexer.stringValueUppercase());
            if (si != null) {
                switch(si) {
                    case TRUNCATE:
                        return truncate();
                }
            }
        default:
            throw err("unsupported DDL");
    }
}