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https://issues.apache.org/jira/browse/DRILL-2763?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daniel Barclay (Drill) resolved DRILL-2763.
-------------------------------------------
Resolution: Fixed
Superseded by combination of DRILL-3216 (fixes) and DRILL-3308 (remainder).
> [umbrella] Implement INFORMATION_SCHEMA.COLUMNS enough for relevant tools
> -------------------------------------------------------------------------
>
> Key: DRILL-2763
> URL: https://issues.apache.org/jira/browse/DRILL-2763
> Project: Apache Drill
> Issue Type: Bug
> Components: Storage - Information Schema
> Reporter: Daniel Barclay (Drill)
> Assignee: Daniel Barclay (Drill)
> Fix For: 1.1.0
>
>
> \[Edit: Problems marked with "\[3216]" were fixed by DRILL-3216.]
> Note: This JIRA report is/was intended in part for for tracking specific
> noticed differences between Drill and standard SQL (not necessarily
> differences we've already decided to fix), and also in part as a reminder of
> this likelihood of running into problems with tools that we care about (even
> that set of problems isn't known now).
> Drill's {{INFORMATION_SCHEMA.COLUMNS}} is not compliant with SQL:2011.
> *A. {{COLUMNS}} columns existing in Drill that are not compliant with
> standard SQL*:
> 1. *TDB*: {{TABLE_NAME}} holds the original form of the identifier but
> _might_ need to be uppercased here to be compliant (or possibly internal
> matching queries (e.g., for JDBC's getColumns(...)) could be
> case-insensitive).
> 2. *TDB*: {{COLUMN_NAME}} holds the original form of the identifier but
> _might_ need to be uppercased here to be compliant (or possibly internal
> matching queries (e.g., for JDBC's getColumns(...)) could be
> case-insensitive).
> 3. \[3216] {{ORDINAL_POSITION}} values are zero-based rather than being
> one-based.
> 4. \[3216] {{CHARACTER_MAXIMUM_LENGTH}}, {{NUMERIC_PRECISION_RADIX}},
> {{NUMERIC_SCALE}}, and {{NUMERIC_PRECISION}} use {{-1}} instead of {{NULL}}
> for the "not-applicable" case.
> 5. \[3216] {{NUMERIC_PRECISION}} for non-{{DECIMAL}}/{{NUMERIC}} exact
> numeric types (e.g., {{INTEGER}}) and approximate numeric types (e.g.,
> {{DOUBLE}}) is {{-1}} (logical null) instead of the specified values.
> 6. \[3216] {{NUMERIC_SCALE}} for non-{{DECIMAL}}/{{NUMERIC}} exact numeric
> types is {{-1}} instead of {{0}}.
> 7. \[3216] {{NUMERIC_SCALE}} for approximate numeric types is {{-1}} instead
> of the number of bits of precision (24 and 53(?)).
> 8. \[3216] {{NUMERIC_PRECISION_RADIX}} for integral exact numeric types is
> {{-1}} instead of {{10}}.
> 9. \[3216] {{NUMERIC_PRECISION_RADIX}} for approximate exact numeric types is
> {{-1}} instead of {{2}}.
> 10. \[3216] {{CHARACTER_MAXIMUM_LENGTH}} for types {{CHAR}}, {{BINARY}}, and
> {{VAR BINARY}} is {{-1}} instead of the corresponding length.
> 11. \[3216] {{DATA_TYPE}} values for {{INTERVAL}} with {{YEAR}} and/or
> {{MONTH}} and for {{INTERVAL}} with {{DAY}}, {{HOUR}}, {{MINUTE}}, and/or
> {{SECOND}} are "{{INTERVAL_YEAR_MONTH}}" and "{{INTERVAL_DATA_TIME}}",
> respectively, instead of the data type name "{{INTERVAL}}".
> 12. \[3216] {{DATA_TYPE}} values for non-atomic types seem to be type
> descriptors ({{<data type>}} syntax; e.g., "{{VARCHAR(65536) ARRAY}}")
> instead of just data type names (e.g., "{{ARRAY}}").
> *B. Standard {{COLUMNS}} columns that don't exist in Drill and that probably
> are more relevant*:
> 1. \[3216] {{CHARACTER_OCTET_LENGTH}} does not exist. (Drill's JDBC driver
> needs to return this, and currently tries to compute it itself.)
> 2. \[3216] {{DATETIME_PRECISION}} does not exist. (Drill's JDBC driver
> probably needs it to compute its {{getColumns()}}'s {{COLUMN_SIZE}}
> correctly.)
> 3. \[3216] {{INTERVAL_TYPE}} does not exist. (Drill's JDBC driver needs this
> to compute its {{getColumns()}}'s {{COLUMN_SIZE}} correctly once
> {{COLUMNS.DATA_TYPE}} is correct.}
> 4. \[3216] {{INTERVAL_PRECISION}} does not exist. (Drill's JDBC driver needs
> this to compute its {{getColumns()}}'s {{COLUMN_SIZE}} correctly.)
> \[TBD]:
> 5. {{MAXIMUM_CARDINALITY}} does not exist. (This might be relevant for
> JDBC's {{getColumns()}}'s {{COLUMN_SIZE}}.)
> *C. Standard {{COLUMNS}} columns that don't exist in Drill but are less
> likely to be relevant (listed for completeness)*:
> - \[3216] {{COLUMN_DEFAULT}}
> - {{CHARACTER_SET_CATALOG}}
> - {{CHARACTER_SET_SCHEMA}}
> - {{CHARACTER_SET_NAME}}
> - {{COLLATION_CATALOG}}
> - {{COLLATION_SCHEMA}}
> - {{COLLATION_NAME}}
> - {{DOMAIN_CATALOG}}
> - {{DOMAIN_SCHEMA}}
> - {{DOMAIN_NAME}}
> - {{UDT_CATALOG}}
> - {{UDT_SCHEMA}}
> - {{UDT_NAME}}
> - {{SCOPE_CATALOG}}
> - {{SCOPE_SCHEMA}}
> - {{SCOPE_NAME}}
> - {{DTD_IDENTIFIER}}
> - {{IS_SELF_REFERENCING}}
> - {{IS_IDENTITY}}
> - {{IDENTITY_GENERATION}}
> - {{IDENTITY_START}}
> - {{IDENTITY_INCREMENT}}
> - {{IDENTITY_MAXIMUM}}
> - {{IDENTITY_MINIMUM}}
> - {{IDENTITY_CYCLE}}
> - {{IS_GENERATED}}
> - {{GENERATION_EXPRESSION}}
> - {{IS_SYSTEM_TIME_PERIOD_START}}
> - {{IS_SYSTEM_TIME_PERIOD_END}}
> - {{SYSTEM_TIME_PERIOD_TIMESTAMP_GENERATION}}
> - {{IS_UPDATABLE}}
> - {{DECLARED_DATA_TYPE}}
> - {{DECLARED_NUMERIC_PRECISION}}
> - {{DECLARED_NUMERIC_SCALE}}
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