1:56 p.m.
JDBC connector handling of convert is inconsistent
--------------------------------------------------
Key: TEIID-806
URL: https://jira.jboss.org/jira/browse/TEIID-806
Project: Teiid
Issue Type: Quality Risk
Components: JDBC Connector
Affects Versions: 6.0.0
Reporter: Steven Hawkins
Assignee: Steven Hawkins
Fix For: 6.3.0
If a source lacks the exact representation of a Teiid type we approximate it with the
closest source type. Pushed converts will typically not have the same affect as if they
are evaluated in the engine. For example sources lacking byte or tinyint types are having
conversions dropped rather, but the actual effect should be modulo the max byte value. We
also are not ensuring that the truncation or rounding behavior is the same for all
conversions - such as from a floating point number to a fixed point.
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2:08 p.m.
New subject: [JBoss JIRA] Commented: (TEIID-806) JDBC connector handling of convert is inconsistent
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https://jira.jboss.org/jira/browse/TEIID-806?page=com.atlassian.jira.plug...
]
Steven Hawkins commented on TEIID-806:
--------------------------------------
Boolean handling also currently typically only accounts to 0 and 1. however to and from
string operations should also account for TRUE and FALSE and allow for null values.
Based upon TEIID-800 char should also consistently be treated as char(1).
JDBC connector handling of convert is inconsistent
--------------------------------------------------
Key: TEIID-806
URL: https://jira.jboss.org/jira/browse/TEIID-806
Project: Teiid
Issue Type: Quality Risk
Components: JDBC Connector
Affects Versions: 6.0.0
Reporter: Steven Hawkins
Assignee: Steven Hawkins
Fix For: 6.3.0
If a source lacks the exact representation of a Teiid type we approximate it with the
closest source type. Pushed converts will typically not have the same affect as if they
are evaluated in the engine. For example sources lacking byte or tinyint types are having
conversions dropped rather, but the actual effect should be modulo the max byte value. We
also are not ensuring that the truncation or rounding behavior is the same for all
conversions - such as from a floating point number to a fixed point.
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4:36 p.m.
New subject: [JBoss JIRA] Updated: (TEIID-806) JDBC connector handling of convert is inconsistent
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https://jira.jboss.org/jira/browse/TEIID-806?page=com.atlassian.jira.plug...
]
Steven Hawkins updated TEIID-806:
---------------------------------
Fix Version/s: 6.2.0
(was: 6.3.0)
JDBC connector handling of convert is inconsistent
--------------------------------------------------
Key: TEIID-806
URL: https://jira.jboss.org/jira/browse/TEIID-806
Project: Teiid
Issue Type: Quality Risk
Components: JDBC Connector
Affects Versions: 6.0.0
Reporter: Steven Hawkins
Assignee: Steven Hawkins
Fix For: 6.2.0
If a source lacks the exact representation of a Teiid type we approximate it with the
closest source type. Pushed converts will typically not have the same affect as if they
are evaluated in the engine. For example sources lacking byte or tinyint types are having
conversions dropped rather, but the actual effect should be modulo the max byte value. We
also are not ensuring that the truncation or rounding behavior is the same for all
conversions - such as from a floating point number to a fixed point.
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4:47 p.m.
New subject: [JBoss JIRA] Resolved: (TEIID-806) JDBC connector handling of convert is inconsistent
[
https://jira.jboss.org/jira/browse/TEIID-806?page=com.atlassian.jira.plug...
]
Steven Hawkins resolved TEIID-806.
----------------------------------
Resolution: Done
Created a better base class (ConvertModifier) to represent the convert function. Also
ensured that type mappings more closely reflect Teiid type semantics. For example
integral types in oracle now use the trunc function to ensure that results are more
consistent (this will need to be done more pervasively - for example oracle division of
Teiid int types will actually be done as a number type and should also be
converted/truncated). Also fixed the use default decimal/varchar types that had default
length/precision/scale insufficient to hold all possible values. However to do this it is
assumed that bigdecimal maps to decimal(38, 19) and biginteger maps to decimal(38, 0) - or
whatever the maximum precision supported by the system is. This is inconsistent with our
internal type system, since we assume float/double are implicitly convertable to
bigdecimal and biginteger is implicitly convertable to bigdecimal. This should be
reexamined by TEIID-65/TEIID-7.
JDBC connector handling of convert is inconsistent
--------------------------------------------------
Key: TEIID-806
URL: https://jira.jboss.org/jira/browse/TEIID-806
Project: Teiid
Issue Type: Quality Risk
Components: JDBC Connector
Affects Versions: 6.0.0
Reporter: Steven Hawkins
Assignee: Steven Hawkins
Fix For: 6.2.0
If a source lacks the exact representation of a Teiid type we approximate it with the
closest source type. Pushed converts will typically not have the same affect as if they
are evaluated in the engine. For example sources lacking byte or tinyint types are having
conversions dropped rather, but the actual effect should be modulo the max byte value. We
also are not ensuring that the truncation or rounding behavior is the same for all
conversions - such as from a floating point number to a fixed point.
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12:43 p.m.
New subject: [JBoss JIRA] Closed: (TEIID-806) JDBC connector handling of convert is inconsistent
[
https://jira.jboss.org/browse/TEIID-806?page=com.atlassian.jira.plugin.sy...
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Steve Hawkins closed TEIID-806.
-------------------------------
JDBC connector handling of convert is inconsistent
--------------------------------------------------
Key: TEIID-806
URL: https://jira.jboss.org/browse/TEIID-806
Project: Teiid
Issue Type: Quality Risk
Components: JDBC Connector
Affects Versions: 6.0.0
Reporter: Steven Hawkins
Assignee: Steven Hawkins
Fix For: 6.2.0
If a source lacks the exact representation of a Teiid type we approximate it with the
closest source type. Pushed converts will typically not have the same affect as if they
are evaluated in the engine. For example sources lacking byte or tinyint types are having
conversions dropped rather, but the actual effect should be modulo the max byte value. We
also are not ensuring that the truncation or rounding behavior is the same for all
conversions - such as from a floating point number to a fixed point.
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5291
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5596
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4 comments
2 participants
participants (2)
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Steve Hawkins (JIRA) -
Steven Hawkins (JIRA)