String username
String password
String drivername
String dbURL
String queryTemplate
int resultSetType
int resultSetConcurrency
org.apache.flink.api.table.typeutils.RowTypeInfo rowTypeInfo
boolean hasNext
Object[][] parameterValues
String username
String password
String drivername
String dbURL
String query
int batchInterval
Connection dbConn
PreparedStatement upload
int batchCount
int[] typesArray
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