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https://issues.apache.org/jira/browse/CALCITE-6909?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17938087#comment-17938087
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Yu Xu edited comment on CALCITE-6909 at 3/25/25 3:05 AM:
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Yes, but a problem that DECIMAL only support precision from [1, 9], and this
precision is not fitable when use want to bigger precision, so here maybe need
with multiple DECIMAL to support bigger precision for user and Decimal
equivalent to Decimal32, [~nobigo] Can refer as follow :
h2. Decimal Value
Ranges[|https://clickhouse.com/docs/sql-reference/data-types/decimal#decimal-value-ranges]
* Decimal(P, S) - ( -1 * 10^(P - S), 1 * 10^(P - S) )
* Decimal32(S) - ( -1 * 10^(9 - S), 1 * 10^(9 - S) )
* Decimal64(S) - ( -1 * 10^(18 - S), 1 * 10^(18 - S) )
* Decimal128(S) - ( -1 * 10^(38 - S), 1 * 10^(38 - S) )
* Decimal256(S) - ( -1 * 10^(76 - S), 1 * 10^(76 - S) )
was (Author: JIRAUSER307770):
Yes, but a problem that DECIMAL only support precision from [1, 9], and this
precision is not fitable when use want to bigger precision, so here maybe need
with multiple DECIMAL to support bigger precision for user. [~nobigo]
> Support ClickHouse Dailect with Decimal type
> --------------------------------------------
>
> Key: CALCITE-6909
> URL: https://issues.apache.org/jira/browse/CALCITE-6909
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.39.0
> Reporter: Yu Xu
> Assignee: Yu Xu
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.40.0
>
>
> Currently Calcite not support Decimal type in ClickHouse dialect.
> In ClickHouse:
> * *P - precision. Valid range: [ 1 : 76 ].*
> * *S - scale. Valid range: [ 0 : P ].*
> Depending on P parameter value Decimal(P, S) is a synonym for:
> * *P from [ 1 : 9 ] - for Decimal32(S)*
> * *P from [ 10 : 18 ] - for Decimal64(S)*
> * *P from [ 19 : 38 ] - for Decimal128(S)*
> * *P from [ 39 : 76 ] - for Decimal256(S)*
>
> we can refer to doc with:
> [https://clickhouse.com/docs/sql-reference/data-types/decimal]
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