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https://issues.apache.org/jira/browse/DERBY-6956?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16126715#comment-16126715
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Bryan Pendleton commented on DERBY-6956:
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And in the particular code path tickled by the CREATE TABLE AS SELECT
statement, in the code:
{code:java}
public boolean isUserCreatableType() throws StandardException
{
switch (typeId.getJDBCTypeId())
{
case Types.JAVA_OBJECT:
return getTypeId().getBaseTypeId().isAnsiUDT();
case Types.DECIMAL:
return
(getPrecision() <= typeId.getMaximumPrecision()) &&
(getScale() <= typeId.getMaximumScale()) &&
(getMaximumWidth() <= typeId.getMaximumMaximumWidth());
default: break;
}
return true;
}
{code}
the problem is that getMaximumWidth() returns 33, which is larger than the 31
limit for DECIMAL.
So, somehow, the statement thinks it's trying to create a field of width 33,
even though the source table is DECIMAL(31,6).
And, sure enough, if I change the repro so that the DECIMALCOLUMN column is
DECIMAL(29,6), the test passes and the error is not thrown.
> Create table as Select cannot copy Decimal columns
> --------------------------------------------------
>
> Key: DERBY-6956
> URL: https://issues.apache.org/jira/browse/DERBY-6956
> Project: Derby
> Issue Type: Bug
> Components: JDBC, SQL
> Affects Versions: 10.13.1.1
> Environment: Windows 7, DataGrip
> Reporter: Murat Cengiz
> Labels: newbie
>
> I create a test table with the following query:
> CREATE TABLE "DERBYTEST" ("STRINGCOLUMN" varchar(255), "INTEGERCOLUMN"
> integer, "SHORTCOLUMN" varchar(255), "LONGCOLUMN" bigint, "DOUBLECOLUMN"
> double, "FLOATCOLUMN" double, "DECIMALCOLUMN" decimal(31, 6), "BOOLEANCOLUMN"
> smallint, "DATECOLUMN" timestamp, "DATETIMECOLUMN" timestamp, "ID" integer,
> "LASTMODTIME" timestamp, PRIMARY KEY ("ID"))
> this query completes successfully
> I later try to copy the table with the following query:
> CREATE TABLE "DERBYTEST_TEMP" AS SELECT * FROM DERBYTEST WITH NO DATA
> This throws the following exception:
> [42X71][30000] Invalid data type 'DECIMAL(31, 6)' for column 'DECIMALCOLUMN'
> Everything works perfectly fine if I remove the decimal column.
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