Method getDb

fe/src/main/java/org/apache/impala/catalog/Catalog.java:203–207

Gets the Db object from the Catalog using a case-insensitive lookup on the name. Returns null if no matching database is found.

(String dbName)

   * Returns null if no matching database is found.
   */
  public Db getDb(String dbName) {
    Preconditions.checkArgument(dbName != null && !dbName.isEmpty(),
        "Null or empty database name given as argument to Catalog.getDb");
    return dbCache_.get(dbName.toLowerCase());
  }

  /**
   * Removes a database from the metadata cache. Returns the value removed or null