Zhuoluo Yang created FLINK-6039:
-----------------------------------
Summary: Row of TableFunction should support flexible number of
fields
Key: FLINK-6039
URL: https://issues.apache.org/jira/browse/FLINK-6039
Project: Flink
Issue Type: Improvement
Reporter: Zhuoluo Yang
Assignee: Zhuoluo Yang
In actual world, especially while processing log with TableFunction. The format
of log in actual world is flexible. Thus, the number of fields should not be
fixed.
For examples, we should make the three following types of of TableFunction
works.
{code}
// Test for incomplete row
class TableFunc4 extends TableFunction[Row] {
def eval(str: String): Unit = {
if (str.contains("#")) {
str.split("#").foreach({ s =>
val row = new Row(3)
row.setField(0, s) // And we only set values for one column
collect(row)
})
}
}
override def getResultType: TypeInformation[Row] = {
new RowTypeInfo(BasicTypeInfo.STRING_TYPE_INFO,
BasicTypeInfo.INT_TYPE_INFO,
BasicTypeInfo.INT_TYPE_INFO)
}
}
// Test for incomplete row
class TableFunc5 extends TableFunction[Row] {
def eval(str: String): Unit = {
if (str.contains("#")) {
str.split("#").foreach({ s =>
val row = new Row(1) // ResultType is three columns, we have only one
here
row.setField(0, s)
collect(row)
})
}
}
override def getResultType: TypeInformation[Row] = {
new RowTypeInfo(BasicTypeInfo.STRING_TYPE_INFO,
BasicTypeInfo.INT_TYPE_INFO,
BasicTypeInfo.INT_TYPE_INFO)
}
}
// Test for overflow row
class TableFunc6 extends TableFunction[Row] {
def eval(str: String): Unit = {
if (str.contains("#")) {
str.split("#").foreach({ s =>
val row = new Row(5) // ResultType is two columns, we have five
columns here
row.setField(0, s)
row.setField(1, s.length)
row.setField(2, s.length)
row.setField(3, s.length)
row.setField(4, s.length)
collect(row)
})
}
}
override def getResultType: TypeInformation[Row] = {
new RowTypeInfo(BasicTypeInfo.STRING_TYPE_INFO,
BasicTypeInfo.INT_TYPE_INFO)
}
}
{code}
Actually, the TableFunc4 and TableFunc6 has already worked correctly with
current version. This issue will make TableFunc5 works.
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