io.druid.sql.calcite.planner

Class Calcites

java.lang.Object

io.druid.sql.calcite.planner.Calcites

public class Calcites
extends Object

Utility functions for Calcite.

Method Summary

Modifier and Type	Method and Description
static org.joda.time.DateTime	calciteDateTimeLiteralToJoda(org.apache.calcite.rex.RexNode literal, org.joda.time.DateTimeZone timeZone) Translates "literal" (a TIMESTAMP or DATE literal) to milliseconds since the epoch using the provided session time zone.
static org.joda.time.DateTime	calciteDateToJoda(int date, org.joda.time.DateTimeZone timeZone) The inverse of jodaToCalciteDate(DateTime, DateTimeZone).
static org.joda.time.DateTime	calciteTimestampToJoda(long timestamp, org.joda.time.DateTimeZone timeZone) The inverse of jodaToCalciteTimestamp(DateTime, DateTimeZone).
static org.apache.calcite.schema.SchemaPlus	createRootSchema(org.apache.calcite.schema.Schema druidSchema, AuthorizerMapper authorizerMapper)
static Charset	defaultCharset()
static String	escapeStringLiteral(String s)
static String	findOutputNamePrefix(String basePrefix, NavigableSet<String> strings)
static StringComparator	getStringComparatorForSqlTypeName(org.apache.calcite.sql.type.SqlTypeName sqlTypeName)
static StringComparator	getStringComparatorForValueType(ValueType valueType)
static ValueType	getValueTypeForSqlTypeName(org.apache.calcite.sql.type.SqlTypeName sqlTypeName)
static boolean	isIntLiteral(org.apache.calcite.rex.RexNode rexNode) Checks if a RexNode is a literal int or not.
static int	jodaToCalciteDate(org.joda.time.DateTime dateTime, org.joda.time.DateTimeZone timeZone) Calcite expects "DATE" types to be number of days from the epoch to the UTC date matching the local time fields.
static org.apache.calcite.util.DateString	jodaToCalciteDateString(org.joda.time.DateTime dateTime, org.joda.time.DateTimeZone timeZone) Calcite expects DATE literals to be represented by DateStrings in the local time zone.
static long	jodaToCalciteTimestamp(org.joda.time.DateTime dateTime, org.joda.time.DateTimeZone timeZone) Calcite expects "TIMESTAMP" types to be an instant that has the expected local time fields if printed as UTC.
static org.apache.calcite.util.TimestampString	jodaToCalciteTimestampString(org.joda.time.DateTime dateTime, org.joda.time.DateTimeZone timeZone) Calcite expects TIMESTAMP literals to be represented by TimestampStrings in the local time zone.
static org.apache.calcite.util.TimeString	jodaToCalciteTimeString(org.joda.time.DateTime dateTime, org.joda.time.DateTimeZone timeZone) Calcite expects TIME literals to be represented by TimeStrings in the local time zone.
static void	setSystemProperties()

Methods inherited from class java.lang.Object

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

Method Detail

setSystemProperties

public static void setSystemProperties()

defaultCharset

public static Charset defaultCharset()

createRootSchema

public static org.apache.calcite.schema.SchemaPlus createRootSchema(org.apache.calcite.schema.Schema druidSchema,
                                                                    AuthorizerMapper authorizerMapper)

escapeStringLiteral

public static String escapeStringLiteral(String s)

getValueTypeForSqlTypeName

public static ValueType getValueTypeForSqlTypeName(org.apache.calcite.sql.type.SqlTypeName sqlTypeName)

getStringComparatorForSqlTypeName

public static StringComparator getStringComparatorForSqlTypeName(org.apache.calcite.sql.type.SqlTypeName sqlTypeName)

getStringComparatorForValueType

public static StringComparator getStringComparatorForValueType(ValueType valueType)

jodaToCalciteTimestamp

public static long jodaToCalciteTimestamp(org.joda.time.DateTime dateTime,
                                          org.joda.time.DateTimeZone timeZone)

Calcite expects "TIMESTAMP" types to be an instant that has the expected local time fields if printed as UTC.

Parameters:

dateTime - joda timestamp

timeZone - session time zone

Returns:

Calcite style millis

jodaToCalciteDate

public static int jodaToCalciteDate(org.joda.time.DateTime dateTime,
                                    org.joda.time.DateTimeZone timeZone)

Calcite expects "DATE" types to be number of days from the epoch to the UTC date matching the local time fields.

Parameters:

dateTime - joda timestamp

timeZone - session time zone

Returns:

Calcite style date

jodaToCalciteTimestampString

public static org.apache.calcite.util.TimestampString jodaToCalciteTimestampString(org.joda.time.DateTime dateTime,
                                                                                   org.joda.time.DateTimeZone timeZone)

Calcite expects TIMESTAMP literals to be represented by TimestampStrings in the local time zone.

Parameters:

dateTime - joda timestamp

timeZone - session time zone

Returns:

Calcite style Calendar, appropriate for literals

jodaToCalciteTimeString

public static org.apache.calcite.util.TimeString jodaToCalciteTimeString(org.joda.time.DateTime dateTime,
                                                                         org.joda.time.DateTimeZone timeZone)

Calcite expects TIME literals to be represented by TimeStrings in the local time zone.

Parameters:

dateTime - joda timestamp

timeZone - session time zone

Returns:

Calcite style Calendar, appropriate for literals

jodaToCalciteDateString

public static org.apache.calcite.util.DateString jodaToCalciteDateString(org.joda.time.DateTime dateTime,
                                                                         org.joda.time.DateTimeZone timeZone)

Calcite expects DATE literals to be represented by DateStrings in the local time zone.

Parameters:

dateTime - joda timestamp

timeZone - session time zone

Returns:

Calcite style Calendar, appropriate for literals

calciteDateTimeLiteralToJoda

public static org.joda.time.DateTime calciteDateTimeLiteralToJoda(org.apache.calcite.rex.RexNode literal,
                                                                  org.joda.time.DateTimeZone timeZone)

Translates "literal" (a TIMESTAMP or DATE literal) to milliseconds since the epoch using the provided session time zone.

Parameters:

literal - TIMESTAMP or DATE literal

timeZone - session time zone

Returns:

milliseconds time

calciteTimestampToJoda

public static org.joda.time.DateTime calciteTimestampToJoda(long timestamp,
                                                            org.joda.time.DateTimeZone timeZone)

The inverse of jodaToCalciteTimestamp(DateTime, DateTimeZone).

Parameters:

timestamp - Calcite style timestamp

timeZone - session time zone

Returns:

joda timestamp, with time zone set to the session time zone

calciteDateToJoda

public static org.joda.time.DateTime calciteDateToJoda(int date,
                                                       org.joda.time.DateTimeZone timeZone)

The inverse of jodaToCalciteDate(DateTime, DateTimeZone).

Parameters:

date - Calcite style date

timeZone - session time zone

Returns:

joda timestamp, with time zone set to the session time zone

isIntLiteral

public static boolean isIntLiteral(org.apache.calcite.rex.RexNode rexNode)

Checks if a RexNode is a literal int or not. If this returns true, then RexLiteral.intValue(literal) can be used to get the value of the literal.

Parameters:

rexNode - the node

Returns:

true if this is an int

findOutputNamePrefix

public static String findOutputNamePrefix(String basePrefix,
                                          NavigableSet<String> strings)