[jira] [Created] (FLINK-15995) TO_BASE64 sql operator change operandTypeChecker from OperandTypes.ANY to OperandTypes.family(SqlTypeFamily.STRING)

["hailong wang (Jira)" <ji...@apache.org>]

hailong wang created FLINK-15995:
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             Summary: TO_BASE64 sql operator change operandTypeChecker from OperandTypes.ANY to OperandTypes.family(SqlTypeFamily.STRING) 
                 Key: FLINK-15995
                 URL: https://issues.apache.org/jira/browse/FLINK-15995
             Project: Flink
          Issue Type: Improvement
          Components: Table SQL / Planner
    Affects Versions: 1.10.0
            Reporter: hailong wang
             Fix For: 1.11.0


For the TO_BASE64 sql operator, the operandTypeChecker is OperandTypes.ANY which is too large. I think we should change it to OperandTypes.family(SqlTypeFamily.STRING) .

For if users use 

 
{code:java}
testSqlApi("to_base64(11)", "AQIDBA=="){code}
 

it will throw 
{code:java}
Caused by: org.apache.flink.api.common.InvalidProgramException: Table program cannot be compiled. This is a bug. Please file an issue.Caused by: org.apache.flink.api.common.InvalidProgramException: Table program cannot be compiled. This is a bug. Please file an issue. at org.apache.flink.table.runtime.generated.CompileUtils.doCompile(CompileUtils.java:81) at org.apache.flink.table.runtime.generated.CompileUtils.lambda$compile$1(CompileUtils.java:66) at org.apache.flink.shaded.guava18.com.google.common.cache.LocalCache$LocalManualCache$1.load(LocalCache.java:4742) at org.apache.flink.shaded.guava18.com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3527) at org.apache.flink.shaded.guava18.com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2319) at org.apache.flink.shaded.guava18.com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2282) at org.apache.flink.shaded.guava18.com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2197) ... 30 moreCaused by: org.codehaus.commons.compiler.CompileException: Line 206, Column 150: No applicable constructor/method found for actual parameters "int"; candidates are: "public static java.lang.String org.apache.flink.table.runtime.functions.SqlFunctionUtils.toBase64(org.apache.flink.table.dataformat.BinaryString)", "public static java.lang.String org.apache.flink.table.runtime.functions.SqlFunctionUtils.toBase64(byte[])" at org.codehaus.janino.UnitCompiler.compileError(UnitCompiler.java:12124)
{code}
it is confusing to users

 



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