THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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The type name of timestamp is pretty long and inconvenient for users, we can introduce abbreviation for them to make it more convenient. The abbreviation name mapping as following:
- TIMESTAMP / TIMESTAMP WITHOUT TIME ZONE <=> TIMESTAMP_NTZ which synonyms TIMESTAMPTIMESTAMP
- TIMESTAMP WITH LOCAL TIME ZONE <=> TIMESTAMP_LTZ
- TIMESTAMP WITH TIME ZONE <=> TIMESTAMP_TZ (supports them in the future)
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