org.apache.hadoop.hive.ql.parse
Class BaseSemanticAnalyzer

java.lang.Object
  org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer

Direct Known Subclasses:

DDLSemanticAnalyzer, ExplainSemanticAnalyzer, ExportSemanticAnalyzer, FunctionSemanticAnalyzer, ImportSemanticAnalyzer, LoadSemanticAnalyzer, SemanticAnalyzer

public abstract class BaseSemanticAnalyzer
extends Object

BaseSemanticAnalyzer.

Nested Class Summary

static class

BaseSemanticAnalyzer.tableSpec tableSpec.

Field Summary

protected static String	COLUMNAR_SERDE
protected HiveConf	conf
protected SessionState.LogHelper	console
protected Context	ctx
protected Hive	db
protected FetchTask	fetchTask
static int	HIVE_COLUMN_ORDER_ASC
static int	HIVE_COLUMN_ORDER_DESC
protected HashMap<String,String>	idToTableNameMap
protected HashSet<ReadEntity>	inputs ReadEntitites that are passed to the hooks.
protected LineageInfo	linfo Lineage information for the query.
protected org.apache.commons.logging.Log	LOG
protected HashSet<WriteEntity>	outputs List of WriteEntities that are passed to the hooks.
protected QueryProperties	queryProperties
protected static String	RCFILE_INPUT
protected static String	RCFILE_OUTPUT
protected List<Task<? extends Serializable>>	rootTasks
protected static String	SEQUENCEFILE_INPUT
protected static String	SEQUENCEFILE_OUTPUT
protected TableAccessInfo	tableAccessInfo
protected static String	TEXTFILE_INPUT
protected static String	TEXTFILE_OUTPUT

Constructor Summary

BaseSemanticAnalyzer(HiveConf conf)

Method Summary

void	analyze(ASTNode ast, Context ctx)
protected void	analyzeDDLSkewedValues(List<List<String>> skewedValues, ASTNode child) Handle skewed values in DDL.
abstract void	analyzeInternal(ASTNode ast)
protected List<String>	analyzeSkewedTablDDLColNames(List<String> skewedColNames, ASTNode child) Analyze list bucket column names
protected boolean	analyzeStoredAdDirs(ASTNode child) process stored as directories
static String	charSetString(String charSetName, String charSetString)
protected HashMap<String,String>	extractPartitionSpecs(org.antlr.runtime.tree.Tree partspec)
protected List<String>	getColumnNames(ASTNode ast)
protected List<Order>	getColumnNamesOrder(ASTNode ast)
protected List<FieldSchema>	getColumns(ASTNode ast)
static List<FieldSchema>	getColumns(ASTNode ast, boolean lowerCase) Get the list of FieldSchema out of the ASTNode.
Hive	getDb()
FetchTask	getFetchTask()
HashMap<String,String>	getIdToTableNameMap()
HashSet<ReadEntity>	getInputs()
LineageInfo	getLineageInfo() Gets the lineage information.
HashSet<WriteEntity>	getOutputs()
QueryProperties	getQueryProperties()
List<FieldSchema>	getResultSchema()
List<Task<? extends Serializable>>	getRootTasks()
protected List<String>	getSkewedValueFromASTNode(ASTNode ast) Given a ASTNode, return list of values.
protected List<String>	getSkewedValuesFromASTNode(Node node) Retrieve skewed values from ASTNode.
TableAccessInfo	getTableAccessInfo() Gets the table access information.
protected static String	getTypeStringFromAST(ASTNode typeNode)
static String	getUnescapedName(ASTNode tableOrColumnNode) Get dequoted name from a table/column node.
static String	getUnescapedName(ASTNode tableOrColumnNode, String currentDatabase)
static String	getUnescapedUnqualifiedTableName(ASTNode node) Get the unqualified name from a table node.
protected void	handleGenericFileFormat(ASTNode node)
void	init()
void	initCtx(Context ctx)
boolean	isValidPrefixSpec(Table tTable, Map<String,String> spec) Checks if given specification is proper specification for prefix of partition cols, for table partitioned by ds, hr, min valid ones are (ds='2008-04-08'), (ds='2008-04-08', hr='12'), (ds='2008-04-08', hr='12', min='30') invalid one is for example (ds='2008-04-08', min='30')
static void	readProps(ASTNode prop, Map<String,String> mapProp) Converts parsed key/value properties pairs into a map.
protected void	reset()
void	setFetchTask(FetchTask fetchTask)
void	setLineageInfo(LineageInfo linfo) Sets the lineage information.
void	setTableAccessInfo(TableAccessInfo tableAccessInfo) Sets the table access information.
static String	stripQuotes(String val)
static String	unescapeIdentifier(String val) Remove the encapsulating "`" pair from the identifier.
static String	unescapeSQLString(String b)
void	validate()

Methods inherited from class java.lang.Object

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

Field Detail

db

protected final Hive db

conf

protected final HiveConf conf

rootTasks

protected List<Task<? extends Serializable>> rootTasks

fetchTask

protected FetchTask fetchTask

LOG

protected final org.apache.commons.logging.Log LOG

console

protected final SessionState.LogHelper console

ctx

protected Context ctx

idToTableNameMap

protected HashMap<String,String> idToTableNameMap

queryProperties

protected QueryProperties queryProperties

HIVE_COLUMN_ORDER_ASC

public static int HIVE_COLUMN_ORDER_ASC

HIVE_COLUMN_ORDER_DESC

public static int HIVE_COLUMN_ORDER_DESC

inputs

protected HashSet<ReadEntity> inputs

ReadEntitites that are passed to the hooks.

outputs

protected HashSet<WriteEntity> outputs

List of WriteEntities that are passed to the hooks.

linfo

protected LineageInfo linfo

Lineage information for the query.

tableAccessInfo

protected TableAccessInfo tableAccessInfo

TEXTFILE_INPUT

protected static final String TEXTFILE_INPUT

TEXTFILE_OUTPUT

protected static final String TEXTFILE_OUTPUT

SEQUENCEFILE_INPUT

protected static final String SEQUENCEFILE_INPUT

SEQUENCEFILE_OUTPUT

protected static final String SEQUENCEFILE_OUTPUT

RCFILE_INPUT

protected static final String RCFILE_INPUT

RCFILE_OUTPUT

protected static final String RCFILE_OUTPUT

COLUMNAR_SERDE

protected static final String COLUMNAR_SERDE

Constructor Detail

BaseSemanticAnalyzer

public BaseSemanticAnalyzer(HiveConf conf)
                     throws SemanticException

Throws:

SemanticException

Method Detail

getIdToTableNameMap

public HashMap<String,String> getIdToTableNameMap()

analyzeInternal

public abstract void analyzeInternal(ASTNode ast)
                              throws SemanticException

Throws:

SemanticException

init

public void init()

initCtx

public void initCtx(Context ctx)

analyze

public void analyze(ASTNode ast,
                    Context ctx)
             throws SemanticException

Throws:

SemanticException

validate

public void validate()
              throws SemanticException

Throws:

SemanticException

getRootTasks

public List<Task<? extends Serializable>> getRootTasks()

getFetchTask

public FetchTask getFetchTask()

Returns:

the fetchTask

setFetchTask

public void setFetchTask(FetchTask fetchTask)

Parameters:

fetchTask - the fetchTask to set

reset

protected void reset()

stripQuotes

public static String stripQuotes(String val)

charSetString

public static String charSetString(String charSetName,
                                   String charSetString)
                            throws SemanticException

Throws:

SemanticException

getUnescapedName

public static String getUnescapedName(ASTNode tableOrColumnNode)

Get dequoted name from a table/column node.

Parameters:

tableOrColumnNode - the table or column node

Returns:

for table node, db.tab or tab. for column node column.

getUnescapedName

public static String getUnescapedName(ASTNode tableOrColumnNode,
                                      String currentDatabase)

getUnescapedUnqualifiedTableName

public static String getUnescapedUnqualifiedTableName(ASTNode node)

Get the unqualified name from a table node. This method works for table names qualified with their schema (e.g., "db.table") and table names without schema qualification. In both cases, it returns the table name without the schema.

Parameters:

node - the table node

Returns:

the table name without schema qualification (i.e., if name is "db.table" or "table", returns "table")

unescapeIdentifier

public static String unescapeIdentifier(String val)

Remove the encapsulating "`" pair from the identifier. We allow users to use "`" to escape identifier for table names, column names and aliases, in case that coincide with Hive language keywords.

readProps

public static void readProps(ASTNode prop,
                             Map<String,String> mapProp)

Converts parsed key/value properties pairs into a map.

Parameters:

prop - ASTNode parent of the key/value pairs

mapProp - property map which receives the mappings

unescapeSQLString

public static String unescapeSQLString(String b)

getInputs

public HashSet<ReadEntity> getInputs()

getOutputs

public HashSet<WriteEntity> getOutputs()

getResultSchema

public List<FieldSchema> getResultSchema()

Returns:

the schema for the fields which will be produced when the statement is executed, or null if not known

getColumns

protected List<FieldSchema> getColumns(ASTNode ast)
                                throws SemanticException

Throws:

SemanticException

handleGenericFileFormat

protected void handleGenericFileFormat(ASTNode node)
                                throws SemanticException

Throws:

SemanticException

getColumns

public static List<FieldSchema> getColumns(ASTNode ast,
                                           boolean lowerCase)
                                    throws SemanticException

Get the list of FieldSchema out of the ASTNode.

Throws:

SemanticException

getColumnNames

protected List<String> getColumnNames(ASTNode ast)

getColumnNamesOrder

protected List<Order> getColumnNamesOrder(ASTNode ast)

getTypeStringFromAST

protected static String getTypeStringFromAST(ASTNode typeNode)
                                      throws SemanticException

Throws:

SemanticException

getLineageInfo

public LineageInfo getLineageInfo()

Gets the lineage information.

Returns:

LineageInfo associated with the query.

setLineageInfo

public void setLineageInfo(LineageInfo linfo)

Sets the lineage information.

Parameters:

linfo - The LineageInfo structure that is set in the optimization phase.

getTableAccessInfo

public TableAccessInfo getTableAccessInfo()

Gets the table access information.

Returns:

TableAccessInfo associated with the query.

setTableAccessInfo

public void setTableAccessInfo(TableAccessInfo tableAccessInfo)

Sets the table access information.

Parameters:

taInfo - The TableAccessInfo structure that is set in the optimization phase.

extractPartitionSpecs

protected HashMap<String,String> extractPartitionSpecs(org.antlr.runtime.tree.Tree partspec)
                                                throws SemanticException

Throws:

SemanticException

isValidPrefixSpec

public final boolean isValidPrefixSpec(Table tTable,
                                       Map<String,String> spec)
                                throws HiveException

Checks if given specification is proper specification for prefix of partition cols, for table partitioned by ds, hr, min valid ones are (ds='2008-04-08'), (ds='2008-04-08', hr='12'), (ds='2008-04-08', hr='12', min='30') invalid one is for example (ds='2008-04-08', min='30')

Parameters:

spec - specification key-value map

Returns:

true if the specification is prefix; never returns false, but throws

Throws:

HiveException

getDb

public Hive getDb()

getQueryProperties

public QueryProperties getQueryProperties()

getSkewedValueFromASTNode

protected List<String> getSkewedValueFromASTNode(ASTNode ast)

Given a ASTNode, return list of values. use case: create table xyz list bucketed (col1) with skew (1,2,5) AST Node is for (1,2,5)

Parameters:

ast -

Returns:

getSkewedValuesFromASTNode

protected List<String> getSkewedValuesFromASTNode(Node node)
                                           throws SemanticException

Retrieve skewed values from ASTNode.

Parameters:

node -

Returns:

Throws:

SemanticException

analyzeSkewedTablDDLColNames

protected List<String> analyzeSkewedTablDDLColNames(List<String> skewedColNames,
                                                    ASTNode child)
                                             throws SemanticException

Analyze list bucket column names

Parameters:

skewedColNames -

child -

Returns:

Throws:

SemanticException

analyzeDDLSkewedValues

protected void analyzeDDLSkewedValues(List<List<String>> skewedValues,
                                      ASTNode child)
                               throws SemanticException

Handle skewed values in DDL. It can be used by both skewed by ... on () and set skewed location ().

Parameters:

skewedValues -

child -

Throws:

SemanticException

analyzeStoredAdDirs

protected boolean analyzeStoredAdDirs(ASTNode child)

process stored as directories

Parameters:

child -

Returns: