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https://issues.apache.org/jira/browse/CALCITE-3606?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16998815#comment-16998815
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Jin Xing commented on CALCITE-3606:
-----------------------------------
Hi, Ran Cao ~
Yes, seems current RelBuilder#projectNamed failed to rename the fields.
If we run below tests
{code:java}
@Test public void testDEV() {
final RelBuilder builder = RelBuilder.create(config().build());
RelNode rel = builder
.values(new String[] {"x"}, 0)
.values(new String[] {"y"}, 1)
.union(true)
.projectNamed(
ImmutableList.of(builder.field(0)), ImmutableList.of("col0"), false)
.build();
System.out.println(rel.getRowType());
System.out.println(RelOptUtil.toString(rel));
}{code}
We get
{code:java}
RecordType(INTEGER x)
LogicalUnion(all=[true])
LogicalValues(tuples=[[{ 0 }]])
LogicalValues(tuples=[[{ 1 }]])
{code}
As we can see, the row type is not as expected.
For the exception you mentioned – – _*column "EXPR$0" of relation
"example_table" does not exist,*_ would you please elaborate by stacktrace or
unit test?
Best,
Jin
> batch insert failed
> -------------------
>
> Key: CALCITE-3606
> URL: https://issues.apache.org/jira/browse/CALCITE-3606
> Project: Calcite
> Issue Type: Wish
> Components: core
> Affects Versions: 1.21.0
> Reporter: Ran Cao
> Priority: Major
>
> when I try to execute sql like (insert into example_table (column1,column2)
> values (value1,value2),(value1,value2)), it will failed with error message
> like this: column "EXPR$0" of relation "example_table" does not exist. I find
> the reason is that when converting SqlNode(insert sql) to
> RelNode(TableModify), one of the steps is to change the column that stored in
> RelDataType from the fake column name (like "EXPR$0") to the real column name
> (like "id"). But when the values part in sql is more than one , the step
> above-mentioned will skip because the RelNode is instance of LogicalUnion
> instead of Project, the code refered to org.apache.calcite.tools.RelBuilder
> line 1461:
> if (input instanceof Project && fieldNames != null) {
> // change the column name
> }
>
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