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https://issues.apache.org/jira/browse/CALCITE-5660?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tanner Clary updated CALCITE-5660:
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Description:
When indexing an array in BigQuery, you are required to wrap the index in one
of four position keywords: {{OFFSET}}, {{ORDINAL}}, {{SAFE_OFFSET}}, and
{{SAFE_ORDINAL}}.
{{OFFSET(index)}}: The index starts at zero. Produces an error if the index is
out of range.
{{SAFE_OFFSET(index)}}: The index starts at zero. Returns NULL if the index is
out of range.
{{ORDINAL(index)}}: The index starts at one. Produces an error if the index is
out of range.
{{SAFE_ORDINAL(index)}}: The index starts at one. Returns NULL if the index is
out of range.
These operators are very similar to the existing {{ITEM}} operator currently
used to index an array in Calcite. I believe the offset and out of bounds
behavior for the existing implementation could be parameterized to support the
above operators.
[Link to BigQuery
docs|https://cloud.google.com/bigquery/docs/reference/standard-sql/operators#array_subscript_operator]
I will have a PR open for this in the next day or two, in the meantime any
comments, questions, or suggestions are welcome as always.
was:
When indexing an array in BigQuery, you are required to wrap the index in one
of four position keywords: {{OFFSET}}, {{ORDINAL}}, {{SAFE_OFFSET}}, and
{{SAFE_ORDINAL}}.
{{OFFSET(index)}}: The index starts at zero. Produces an error if the index is
out of range.
SAFE_OFFSET(index)}}: The index starts at zero. Returns NULL if the index is
out of range.
{{ORDINAL(index)}}: The index starts at one. Produces an error if the index is
out of range.
{{SAFE_ORDINAL(index)}}: The index starts at one. Returns NULL if the index is
out of range.
These operators are very similar to the existing {{ITEM}} operator currently
used to index an array in Calcite. I believe the offset and out of bounds
behavior for the existing implementation could be parameterized to support the
above operators.
[Link to BigQuery
docs|https://cloud.google.com/bigquery/docs/reference/standard-sql/operators#array_subscript_operator]
I will have a PR open for this in the next day or two, in the meantime any
comments, questions, or suggestions are welcome as always.
> Implement BigQuery Array Subscript Operators
> --------------------------------------------
>
> Key: CALCITE-5660
> URL: https://issues.apache.org/jira/browse/CALCITE-5660
> Project: Calcite
> Issue Type: Task
> Reporter: Tanner Clary
> Assignee: Tanner Clary
> Priority: Major
>
> When indexing an array in BigQuery, you are required to wrap the index in one
> of four position keywords: {{OFFSET}}, {{ORDINAL}}, {{SAFE_OFFSET}}, and
> {{SAFE_ORDINAL}}.
> {{OFFSET(index)}}: The index starts at zero. Produces an error if the index
> is out of range.
> {{SAFE_OFFSET(index)}}: The index starts at zero. Returns NULL if the index
> is out of range.
> {{ORDINAL(index)}}: The index starts at one. Produces an error if the index
> is out of range.
> {{SAFE_ORDINAL(index)}}: The index starts at one. Returns NULL if the index
> is out of range.
> These operators are very similar to the existing {{ITEM}} operator currently
> used to index an array in Calcite. I believe the offset and out of bounds
> behavior for the existing implementation could be parameterized to support
> the above operators.
> [Link to BigQuery
> docs|https://cloud.google.com/bigquery/docs/reference/standard-sql/operators#array_subscript_operator]
> I will have a PR open for this in the next day or two, in the meantime any
> comments, questions, or suggestions are welcome as always.
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