LOLoad should cache results of LoadMetadata.getSchema() for use in subsequent
calls to LOLoad.getSchema() or LOLoad.determineSchema()
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Key: PIG-1317
URL: https://issues.apache.org/jira/browse/PIG-1317
Project: Pig
Issue Type: Improvement
Affects Versions: 0.7.0
Reporter: Pradeep Kamath
Fix For: 0.7.0
In LOLoad.getProjectionMap(), the private method determineSchema() is called
which inturn calls LoadMetadata.getSchema() - the latter call could potentially
be expensive if the input file is read to determine the schema or a metadata
system is contacted to get the schema - determineSchema() can cache the schema
it gets so that subsequent calls use the cached version.
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