Question

在测试Ignite 2.6.0（2018-07-16）时，发现(IF NOT EXISTS)语句中的CREATE TABLE不起作用。代码显示如下：

    Class.forName("org.apache.ignite.IgniteJdbcThinDriver");
    try (Connection conn = DriverManager.getConnection("jdbc:ignite:thin://127.0.0.1/"))
    {
        try (Statement stmt = conn.createStatement())
        {
            stmt.executeUpdate("CREATE TABLE IF NOT EXISTS City(id LONG PRIMARY KEY,"
                    + " name VARCHAR) WITH \"template=replicated\"");
        }
    }

第一次运行成功后，再次发生异常：

无法执行SQL查询[reqId = 0，req = JdbcQueryExecuteRequest [schemaName = PUBLIC，pageSize = 1024，maxRows = 0，sqlQry =创建表IF 不存在城市（id长主键，名称为VARCHAR） “ template = replicated”，args = []，stmtType = UPDATE_STMT_TYPE]]类 org.apache.ignite.internal.processors.query.IgniteSQLException：表已经存在：CITY，位于 org.apache.ignite.internal.processors.query.h2.ddl.DdlStatementsProcessor.convert（DdlStatementsProcessor.java:582）在 org.apache.ignite.internal.processors.query.h2.ddl.DdlStatementsProcessor.runDdlStatement（DdlStatementsProcessor.java:511）在 org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing.doRunPrepared（IgniteH2Indexing.java:1736）在 org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing.querySqlFields（IgniteH2Indexing.java:1671）在 org.apache.ignite.internal.processors.query.GridQueryProcessor $ 4.applyx（GridQueryProcessor.java:2035）在 org.apache.ignite.internal.processors.query.GridQueryProcessor $ 4.applyx（GridQueryProcessor.java:2030）在 org.apache.ignite.internal.util.lang.IgniteOutClosureX.apply（IgniteOutClosureX.java:36）在 org.apache.ignite.internal.processors.query.GridQueryProcessor.executeQuery（GridQueryProcessor.java:2578）在 org.apache.ignite.internal.processors.query.GridQueryProcessor.querySqlFields（GridQueryProcessor.java:2044）在 org.apache.ignite.internal.processors.odbc.jdbc.JdbcRequestHandler.executeQuery（JdbcRequestHandler.java:456）在 org.apache.ignite.internal.processors.odbc.jdbc.JdbcRequestHandler.handle（JdbcRequestHandler.java:203）在 org.apache.ignite.internal.processors.odbc.ClientListenerNioListener.onMessage（ClientListenerNioListener.java:160）在 org.apache.ignite.internal.processors.odbc.ClientListenerNioListener.onMessage（ClientListenerNioListener.java:44）在 org.apache.ignite.internal.util.nio.GridNioFilterChain $ TailFilter.onMessageReceived（GridNioFilterChain.java:279）在 org.apache.ignite.internal.util.nio.GridNioFilterAdapter.proceedMessageReceived（GridNioFilterAdapter.java:109）在 org.apache.ignite.internal.util.nio.GridNioAsyncNotifyFilter $ 3.body（GridNioAsyncNotifyFilter.java:97）在 org.apache.ignite.internal.util.worker.GridWorker.run（GridWorker.java:110）在 org.apache.ignite.internal.util.worker.GridWorkerPool $ 1.run（GridWorkerPool.java:70）在java.util.concurrent.ThreadPoolExecutor.runWorker（未知来源）在java.util.concurrent.ThreadPoolExecutor $ Worker.run（未知来源）在java.lang.Thread.run（未知来源）

Answer 1

检查相同，是的，这是一个问题。我为此创建了一个Jira问题：https://issues.apache.org/jira/browse/IGNITE-10414。

Answer 2

我今天遇到了这个问题，并通过修改的sql解决了它

"CREATE TABLE IF NOT EXISTS Timer"

到

"CREATE TABLE IF NOT EXISTS myCache.Timer"

（如果NOT EXISTS）在CREATE TABLE语句中不起作用

2 个答案: