Enable oracle aggregation pushdown

[jles01]

Changes related to make aggregation calculated by oracle.

Fixes #5208

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[tooptoop4]

@jles01 no ImplementAvgBigint.java change? like https://github.com/prestosql/presto/pull/5563/files has

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[jles01]

@jles01 no ImplementAvgBigint.java change? like https://github.com/prestosql/presto/pull/5563/files has

I added the corresponding change, in addition I added fetch size as a parameter. For huge tables(100billions+) increasing it from default 1000 to 100000 is huge performance improvement.

[ebyhr]

I added fetch size as a parameter. For huge tables(100billions+) increasing it from default 1000 to 100000 is huge performance improvement.

@jles01 fetchSize is ongoing in #3775. I would recommend avoiding to mixup two enhancement in a PR.

[jles01]

ohhh did not saw that, will revert

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[ebyhr]

@jles01 Could you rebase on upstream to resolve conflicts? We changed directory structure and Java package. This wiki describes migration steps. https://github.com/trinodb/trino/wiki/Developer-Migration

[martint]

@cla-bot check

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