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https://issues.apache.org/jira/browse/TRAFODION-3290?focusedWorklogId=222659&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-222659
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ASF GitHub Bot logged work on TRAFODION-3290:
---------------------------------------------
Author: ASF GitHub Bot
Created on: 03/Apr/19 22:05
Start Date: 03/Apr/19 22:05
Worklog Time Spent: 10m
Work Description: DaveBirdsall commented on pull request #1822:
[TRAFODION-3290] Give better errors for case where table is all LOB columns
URL: https://github.com/apache/trafodion/pull/1822
Formerly, certain UPDATE STATISTICS commands would fail with an odd syntax
error if one were attempting to create a persistent sample table on a base
table having all LOB columns. With the changes here, we will now get a helpful
9233 error message instead.
In a few other circumstances, the 9220 warning message text was not
accurate. The text for this message has now been revised.
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Issue Time Tracking
-------------------
Worklog Id: (was: 222659)
Time Spent: 10m
Remaining Estimate: 0h
> Creating a sample table on an all-LOB table fails with syntax error
> -------------------------------------------------------------------
>
> Key: TRAFODION-3290
> URL: https://issues.apache.org/jira/browse/TRAFODION-3290
> Project: Apache Trafodion
> Issue Type: Bug
> Components: sql-cmp
> Affects Versions: 2.4
> Reporter: David Wayne Birdsall
> Assignee: David Wayne Birdsall
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> The following script reproduces the problem:
> {quote}control query default TRAF_BLOB_AS_VARCHAR 'OFF';
> control query default TRAF_CLOB_AS_VARCHAR 'OFF';
> drop table if exists t1;
> create table t1 (c_clob clob, c_blob blob);
> insert into t1 values (stringtolob('clob_1'), stringtolob('blob_1'));
> update statistics for table t1 on (c_clob, c_blob) sample random 50 percent
> persistent;
> update statistics for table t1 create sample random 100 percent;
> update statistics for table t1 on every column sample random 100 percent
> persistent;
> update statistics for table t1 on every key sample random 100 percent
> persistent;
> update statistics for table t1 on existing column sample random 100 percent
> persistent;
> update statistics for table t1 on necessary column sample random 100 percent
> persistent;
> {quote}
> When run, attempts to create a sample table fail with a syntax error. Instead
> we should fail with error 9246, as shown below:
> {quote}>>obey repro.sql;
> >>control query default TRAF_BLOB_AS_VARCHAR 'OFF';
> --- SQL operation complete.
> >>control query default TRAF_CLOB_AS_VARCHAR 'OFF';
> --- SQL operation complete.
> >>
> >>drop table if exists t1;
> --- SQL operation complete.
> >>
> >>create table t1 (c_clob clob, c_blob blob);
> --- SQL operation complete.
> >>insert into t1 values (stringtolob('clob_1'), stringtolob('blob_1'));
> --- 1 row(s) inserted.
> >>
> >>update statistics for table t1 on (c_clob, c_blob) sample random 50 percent
> >>persistent;
> *** ERROR[9246] UPDATE STATISTICS is not supported on LOB columns. Column
> C_BLOB is a LOB column.
> --- SQL operation failed with errors.
> >>
> >>update statistics for table t1 create sample random 100 percent;
> *** ERROR[9214] Object
> TRAFODION.SCH.TRAF_SAMPLE_00469125659506823465_1553720877_834150 could not be
> created.
> *** ERROR[15001] A syntax error occurred at or before:
> create table TRAFODION.SCH.TRAF_SAMPLE_00469125659506823465_1553720877_834150
> ( ) ATTRIBUTES ALIGNED FORMAT;
> ^ (86 characters from start of SQL statement)
> *** ERROR[8822] The statement was not prepared.
> *** ERROR[8839] Transaction was aborted.
> --- SQL operation failed with errors.
> >>update statistics for table t1 on every column sample random 100 percent
> >>persistent;
> *** ERROR[9214] Object
> TRAFODION.SCH.TRAF_SAMPLE_00469125659506823465_1553720916_953637 could not be
> created.
> *** ERROR[15001] A syntax error occurred at or before:
> create table TRAFODION.SCH.TRAF_SAMPLE_00469125659506823465_1553720916_953637
> ( ) ATTRIBUTES ALIGNED FORMAT;
> ^ (86 characters from start of SQL statement)
> *** ERROR[8822] The statement was not prepared.
> *** ERROR[8839] Transaction was aborted.
> --- SQL operation failed with errors.
> >>update statistics for table t1 on every key sample random 100 percent
> >>persistent;
> *** ERROR[9214] Object
> TRAFODION.SCH.TRAF_SAMPLE_00469125659506823465_1553720950_701762 could not be
> created.
> *** ERROR[15001] A syntax error occurred at or before:
> create table TRAFODION.SCH.TRAF_SAMPLE_00469125659506823465_1553720950_701762
> ( ) ATTRIBUTES ALIGNED FORMAT;
> ^ (86 characters from start of SQL statement)
> *** ERROR[8822] The statement was not prepared.
> *** ERROR[8839] Transaction was aborted.
> --- SQL operation failed with errors.
> >>update statistics for table t1 on existing column sample random 100 percent
> >>persistent;
> *** WARNING[9220] The table is empty, so no persistent sample table was
> created.
> *** WARNING[9217] The statement will have no effect because no histograms are
> currently maintained for the table.
> --- SQL operation completed with warnings.
> >>update statistics for table t1 on necessary column sample random 100
> >>percent persistent;
> *** WARNING[9220] The table is empty, so no persistent sample table was
> created.
> *** WARNING[9218] The statement will have no effect because no histograms
> need to be updated.
> --- SQL operation completed with warnings.
> >>exit;
> End of MXCI Session
> {quote}
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