Examples with SystemViewFactory com.questdb.ql.sys.SystemViewFactory used on opensource projects

Example 1 with SystemViewFactory

use of com.questdb.ql.sys.SystemViewFactory in project questdb by bluestreak01.

the class QueryModel method collectJournalMetadata.

public RecordMetadata collectJournalMetadata(Factory factory) throws ParserException {
    if (journalMetadata != null) {
        return journalMetadata;
    }
    ExprNode readerNode = getJournalName();
    if (readerNode.type != ExprNode.LITERAL && readerNode.type != ExprNode.CONSTANT) {
        throw QueryError.$(readerNode.position, "Journal name must be either literal or string constant");
    }
    String reader = stripMarker(Chars.stripQuotes(readerNode.token));
    SystemViewFactory systemViewFactory = SysFactories.getFactory(reader);
    if (systemViewFactory != null) {
        return systemViewFactory.getMetadata();
    }
    int status = factory.getConfiguration().exists(reader);
    if (status == JournalConfiguration.DOES_NOT_EXIST) {
        throw QueryError.$(readerNode.position, "Journal does not exist");
    }
    if (status == JournalConfiguration.EXISTS_FOREIGN) {
        throw QueryError.$(readerNode.position, "Journal directory is of unknown format");
    }
    try {
        return journalMetadata = factory.getConfiguration().readMetadata(reader);
    } catch (JournalException e) {
        throw QueryError.$(readerNode.position, e.getMessage());
    }
}