Example usage for org.apache.spark.sql SaveMode ErrorIfExists

Introduction

In this page you can find the example usage for org.apache.spark.sql SaveMode ErrorIfExists.

Prototype

SaveMode ErrorIfExists

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Document

ErrorIfExists mode means that when saving a DataFrame to a data source, if data already exists, an exception is expected to be thrown.

Usage

From source file:com.thinkbiganalytics.kylo.catalog.spark.SparkUtil.java

License:Apache License

/**
 * Returns the save mode with the specified name.
 *
 * @throws IllegalArgumentException if no save mode has the specified name
 *//*from w w  w  .j a va 2  s  .  c o  m*/
@Nonnull
public static SaveMode toSaveMode(final String s) {
    Preconditions.checkNotNull(s, "Save mode cannot be null");
    switch (s.toLowerCase()) {
    case "overwrite":
        return SaveMode.Overwrite;

    case "append":
        return SaveMode.Append;

    case "ignore":
        return SaveMode.Ignore;

    case "error":
    case "errorifexists":
    case "default":
        return SaveMode.ErrorIfExists;

    default:
        log.debug("Unknown save mode: {}", s);
        throw new IllegalArgumentException("Unknown save mode: " + s
                + ". Accepted save modes are 'overwrite', 'append', 'ignore', 'error', 'errorifexists'.");
    }
}

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