org.apache.hadoop.hive.ql.ddl

Class ShowUtils

java.lang.Object

org.apache.hadoop.hive.ql.ddl.ShowUtils

public final class ShowUtils
extends Object

Utilities for SHOW ... commands.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ShowUtils.TextMetaDataTable Helps to format tables in SHOW ...

Field Summary

Fields

Modifier and Type	Field and Description
static int	ALIGNMENT
static int	DEFAULT_STRINGBUILDER_SIZE
static String	FIELD_DELIM
static String	LINE_DELIM

Method Summary

Modifier and Type	Method and Description
static void	appendNonNull(StringBuilder builder, Object value)
static void	appendNonNull(StringBuilder builder, Object value, boolean firstColumn)
static void	asJson(OutputStream out, Map<String,Object> data) Convert the map to a JSON string.
static String	convertToString(org.apache.hadoop.hive.metastore.api.Date val)
static String	convertToString(org.apache.hadoop.hive.metastore.api.Decimal val)
static String	convertToString(org.apache.hadoop.hive.metastore.api.Timestamp val)
static String[]	extractColumnValues(org.apache.hadoop.hive.metastore.api.FieldSchema column, boolean isColumnStatsAvailable, org.apache.hadoop.hive.metastore.api.ColumnStatisticsObj columnStatisticsObj)
static void	formatOutput(String[] fields, StringBuilder tableInfo) Prints a row the given fields to a formatted line.
static void	formatOutput(String[] fields, StringBuilder tableInfo, boolean isLastLinePadded, boolean isFormatted) Prints a row with the given fields into the builder.
static void	formatOutput(String name, String value, StringBuilder tableInfo) Prints the name value pair, and if the value contains newlines, it adds one more empty field before the two values (Assumes, the name value pair is already indented with it).
static void	formatOutput(String name, String value, StringBuilder tableInfo, boolean isOutputPadded) Prints the name value pair If the output is padded then unescape the value, so it could be printed in multiple lines.
static DataOutputStream	getOutputStream(org.apache.hadoop.fs.Path outputFile, DDLOperationContext context)
static String	propertiesToString(Map<String,String> properties, Set<String> exclude) Creates a String from the properties in this format: 'property_name1'='property_value1', 'property_name2'='property_value2', ...
static void	writeToFile(String data, String file, DDLOperationContext context)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

FIELD_DELIM

public static final String FIELD_DELIM

See Also:

Constant Field Values

LINE_DELIM

public static final String LINE_DELIM

See Also:

Constant Field Values

DEFAULT_STRINGBUILDER_SIZE

public static final int DEFAULT_STRINGBUILDER_SIZE

See Also:

Constant Field Values

ALIGNMENT

public static final int ALIGNMENT

See Also:

Constant Field Values

Method Detail

getOutputStream

public static DataOutputStream getOutputStream(org.apache.hadoop.fs.Path outputFile,
                                               DDLOperationContext context)
                                        throws HiveException

Throws:

HiveException

propertiesToString

public static String propertiesToString(Map<String,String> properties,
                                        Set<String> exclude)

Creates a String from the properties in this format: 'property_name1'='property_value1', 'property_name2'='property_value2', ... Properties are listed in alphabetical order.

Parameters:

properties - The properties to list.

exclude - Property names to exclude.

writeToFile

public static void writeToFile(String data,
                               String file,
                               DDLOperationContext context)
                        throws IOException

Throws:

IOException

appendNonNull

public static void appendNonNull(StringBuilder builder,
                                 Object value)

appendNonNull

public static void appendNonNull(StringBuilder builder,
                                 Object value,
                                 boolean firstColumn)

extractColumnValues

public static String[] extractColumnValues(org.apache.hadoop.hive.metastore.api.FieldSchema column,
                                           boolean isColumnStatsAvailable,
                                           org.apache.hadoop.hive.metastore.api.ColumnStatisticsObj columnStatisticsObj)

convertToString

public static String convertToString(org.apache.hadoop.hive.metastore.api.Decimal val)

convertToString

public static String convertToString(org.apache.hadoop.hive.metastore.api.Date val)

convertToString

public static String convertToString(org.apache.hadoop.hive.metastore.api.Timestamp val)

asJson

public static void asJson(OutputStream out,
                          Map<String,Object> data)
                   throws HiveException

Convert the map to a JSON string.

Throws:

HiveException

formatOutput

public static void formatOutput(String[] fields,
                                StringBuilder tableInfo,
                                boolean isLastLinePadded,
                                boolean isFormatted)

Prints a row with the given fields into the builder. The last field could be a multiline field, and the extra lines should be padded.

Parameters:

fields - The fields to print

tableInfo - The target builder

isLastLinePadded - Is the last field could be printed in multiple lines, if contains newlines?

formatOutput

public static void formatOutput(String[] fields,
                                StringBuilder tableInfo)

Prints a row the given fields to a formatted line.

Parameters:

fields - The fields to print

tableInfo - The target builder

formatOutput

public static void formatOutput(String name,
                                String value,
                                StringBuilder tableInfo)

Prints the name value pair, and if the value contains newlines, it adds one more empty field before the two values (Assumes, the name value pair is already indented with it).

Parameters:

name - The field name to print

value - The value to print - might contain newlines

tableInfo - The target builder

formatOutput

public static void formatOutput(String name,
                                String value,
                                StringBuilder tableInfo,
                                boolean isOutputPadded)

Prints the name value pair If the output is padded then unescape the value, so it could be printed in multiple lines. In this case it assumes the pair is already indented with a field delimiter

Parameters:

name - The field name to print

value - The value t print

tableInfo - The target builder

isOutputPadded - Should the value printed as a padded string?