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Add view list for metadata getTables method #262

Merged
merged 2 commits into from
Oct 29, 2024
Merged

Add view list for metadata getTables method #262

merged 2 commits into from
Oct 29, 2024

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cdmikechen
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Linked issue: #261

hantmac
hantmac reviewed Aug 25, 2024
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databend-jdbc/src/main/java/com/databend/jdbc/DatabendDatabaseMetaData.java Outdated
@@ -889,6 +886,20 @@ public ResultSet getTables(String catalog, String schemaPattern, String tableNam
buildFilters(sql, filters);
sql.append("\nORDER BY table_type, table_catalog, table_schema, table_name");

if (types == null || types.length == 0 || Arrays.stream(types).allMatch(t -> t.equalsIgnoreCase("VIEW"))) {
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IMHO, using table as the default table type is better and has much better compatibility。

@rad-pat
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rad-pat commented Aug 26, 2024

I think views will be listed with latest Databend, they were incorrectly excluded from the information_schema.tables at one point: databendlabs/databend#16039

@hantmac
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hantmac commented Aug 26, 2024

I think views will be listed with latest Databend, they were incorrectly excluded from the information_schema.tables at one point: datafuselabs/databend#16039

@rad-pat Aha,thanks for reminding. This pr databendlabs/databend#16058 has made table and view both in information_scham.tables.

@cdmikechen
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cdmikechen commented Aug 27, 2024 •
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@hantmac
I use databend v1.2.538-nightly. Does it mean I need to update databend to lastest version?

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hantmac commented Aug 28, 2024

@hantmac I use databend v1.2.538-nightly. Does it mean I need to update databend to lastest version?

@hantmac I use databend v1.2.538-nightly. Does it mean I need to update databend to lastest version?

@cdmikechen Maybe we can use table as default type and merge this pr. It will back capability. Some users do not want to upgrade databend. What do you think ?

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rad-pat commented Aug 28, 2024

I think that on current, or older versions where the bug does not exist, the user will get 2 views returned, one from the table query and one from the view query. The test in this PR is not accurate, it only tests that at least one view is returned. In the SQLAlchemy library, I had to allow for the bug in certain versions: https://github.com/datafuselabs/databend-sqlalchemy/blob/3226f10e0f8b6aa85185208583977037b33ec99f/databend_sqlalchemy/databend_dialect.py#L819

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hantmac commented Aug 29, 2024

I think that on current, or older versions where the bug does not exist, the user will get 2 views returned, one from the table query and one from the view query. The test in this PR is not accurate, it only tests that at least one view is returned. In the SQLAlchemy library, I had to allow for the bug in certain versions: https://github.com/datafuselabs/databend-sqlalchemy/blob/3226f10e0f8b6aa85185208583977037b33ec99f/databend_sqlalchemy/databend_dialect.py#L819

There is a condition https://github.com/datafuselabs/databend-jdbc/pull/262/files#diff-edd43fca3337c0ab2e0fa92af785f7021454a5485f2aea20e11b73fc50ae51d4R889, only if the type == view the SQL will return from view query.

@cdmikechen
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I think that on current, or older versions where the bug does not exist, the user will get 2 views returned, one from the table query and one from the view query. The test in this PR is not accurate, it only tests that at least one view is returned. In the SQLAlchemy library, I had to allow for the bug in certain versions: https://github.com/datafuselabs/databend-sqlalchemy/blob/3226f10e0f8b6aa85185208583977037b33ec99f/databend_sqlalchemy/databend_dialect.py#L819

There is a condition https://github.com/datafuselabs/databend-jdbc/pull/262/files#diff-edd43fca3337c0ab2e0fa92af785f7021454a5485f2aea20e11b73fc50ae51d4R889, only if the type == view the SQL will return from view query.

I'll be reworking the codes this week to make it as compatible and adaptable as possible with different versions of databend.

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hantmac commented Sep 30, 2024

@cdmikechen Hi bro , what's the pr progressing?

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@hantmac
I'm sorry things have been a little busy lately. I will try to take care of this pr when I have time recently.

hantmac
hantmac approved these changes Oct 29, 2024
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LGTM

@hantmac hantmac merged commit 875f4e9 into databendlabs:main Oct 29, 2024
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@cdmikechen @rad-pat @hantmac