[SPARK-30282][DOCS][FOLLOWUP] Update SQL migration guide for SHOW TBLPROPERTIES

[imback82]

What changes were proposed in this pull request?

This PR adds a migration guide for SHOW TBLPROPERTIES for Apache Spark 3.0.0.

Why are the changes needed?

The behavior of SHOW TBLPROPERTIES changed when the table does not exist. The migration guide reflects this user facing change.

Does this PR introduce any user-facing change?

Yes. This is a documentation change.

How was this patch tested?

No tests were added because this is a doc change.

[imback82]

cc: @dongjoon-hyun

[SparkQA]

Test build #116985 has finished for PR 27276 at commit d6fa318.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds the following public classes (experimental):
• class JavaRegressor(JavaPredictor, _JavaPredictorParams):
• class JavaRegressionModel(JavaPredictionModel, _JavaPredictorParams):
• class LinearRegression(JavaRegressor, _LinearRegressionParams, JavaMLWritable, JavaMLReadable):
• class LinearRegressionModel(JavaRegressionModel, _LinearRegressionParams, GeneralJavaMLWritable,
• class DecisionTreeRegressor(JavaRegressor, _DecisionTreeRegressorParams, JavaMLWritable,
• class DecisionTreeRegressionModel(
• class RandomForestRegressor(JavaRegressor, _RandomForestRegressorParams, JavaMLWritable,
• class RandomForestRegressionModel(
• class GBTRegressor(JavaRegressor, _GBTRegressorParams, JavaMLWritable, JavaMLReadable):
• class GBTRegressionModel(
• class AFTSurvivalRegression(JavaRegressor, _AFTSurvivalRegressionParams,
• class AFTSurvivalRegressionModel(JavaRegressionModel, _AFTSurvivalRegressionParams,
• class GeneralizedLinearRegression(JavaRegressor, _GeneralizedLinearRegressionParams,
• class GeneralizedLinearRegressionModel(JavaRegressionModel, _GeneralizedLinearRegressionParams,
• class FMRegressor(JavaRegressor, _FactorizationMachinesParams, JavaMLWritable, JavaMLReadable):
• class FMRegressionModel(JavaRegressionModel, _FactorizationMachinesParams, JavaMLWritable,

[SparkQA]

Test build #116983 has finished for PR 27276 at commit 7eecb41.

• This patch passes all tests.
• This patch does not merge cleanly.
• This patch adds no public classes.

[dongjoon-hyun]

Retest this please.

[dongjoon-hyun]

Could you merge the above two into one?

- Since Spark 3.0, `SHOW TBLPROPERTIES` will cause `AnalysisException` if the table does not exist. In Spark version 2.4 and earlier, this scenario caused `NoSuchTableException`. Also, `SHOW TBLPROPERTIES` on a temporary view will cause `AnalysisException`. In Spark version 2.4 and earlier, it returned an empty result.

[SparkQA]

Test build #117026 has finished for PR 27276 at commit d6fa318.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds the following public classes (experimental):
• class JavaRegressor(JavaPredictor, _JavaPredictorParams):
• class JavaRegressionModel(JavaPredictionModel, _JavaPredictorParams):
• class LinearRegression(JavaRegressor, _LinearRegressionParams, JavaMLWritable, JavaMLReadable):
• class LinearRegressionModel(JavaRegressionModel, _LinearRegressionParams, GeneralJavaMLWritable,
• class DecisionTreeRegressor(JavaRegressor, _DecisionTreeRegressorParams, JavaMLWritable,
• class DecisionTreeRegressionModel(
• class RandomForestRegressor(JavaRegressor, _RandomForestRegressorParams, JavaMLWritable,
• class RandomForestRegressionModel(
• class GBTRegressor(JavaRegressor, _GBTRegressorParams, JavaMLWritable, JavaMLReadable):
• class GBTRegressionModel(
• class AFTSurvivalRegression(JavaRegressor, _AFTSurvivalRegressionParams,
• class AFTSurvivalRegressionModel(JavaRegressionModel, _AFTSurvivalRegressionParams,
• class GeneralizedLinearRegression(JavaRegressor, _GeneralizedLinearRegressionParams,
• class GeneralizedLinearRegressionModel(JavaRegressionModel, _GeneralizedLinearRegressionParams,
• class FMRegressor(JavaRegressor, _FactorizationMachinesParams, JavaMLWritable, JavaMLReadable):
• class FMRegressionModel(JavaRegressionModel, _FactorizationMachinesParams, JavaMLWritable,

[dongjoon-hyun]

+1, LGTM. (Pending Jenkins.)

[SparkQA]

Test build #117027 has finished for PR 27276 at commit 68131b9.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[dongjoon-hyun]

Merged to master. Thank you, @imback82 .