Package org.apache.calcite.sql.dialect

Class PostgresqlSqlDialect

java.lang.Object

org.apache.calcite.sql.SqlDialect

org.apache.calcite.sql.dialect.PostgresqlSqlDialect

public class PostgresqlSqlDialect
extends SqlDialect

A SqlDialect implementation for the PostgreSQL database.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.calcite.sql.SqlDialect

SqlDialect.CalendarPolicy, SqlDialect.Context, SqlDialect.DatabaseProduct, SqlDialect.FakeUtil

Field Summary

Fields

Modifier and Type	Field	Description
static SqlDialect	DEFAULT
private static RelDataTypeSystem	POSTGRESQL_TYPE_SYSTEM	PostgreSQL type system.

Fields inherited from class org.apache.calcite.sql.SqlDialect

BUILT_IN_OPERATORS_LIST, CALCITE, DUMMY, EMPTY_CONTEXT, LOGGER, nullCollation

Constructor Summary

Constructors

Constructor	Description
PostgresqlSqlDialect(SqlDialect.Context context)	Creates a PostgresqlSqlDialect.

Method Summary

Modifier and Type	Method	Description
SqlNode	getCastSpec(RelDataType type)
protected boolean	requiresAliasForFromItems()
boolean	supportsCharSet()	Returns whether the dialect supports character set names as part of a data type, for instance VARCHAR(30) CHARACTER SET `ISO-8859-1`.
boolean	supportsNestedAggregations()	Returns whether the dialect supports nested aggregations, for instance SELECT SUM(SUM(1)) .
void	unparseCall(SqlWriter writer, SqlCall call, int leftPrec, int rightPrec)

Methods inherited from class org.apache.calcite.sql.SqlDialect

allowsAs, create, defaultNullDirection, emptyContext, emulateNullDirection, emulateNullDirectionWithIsNull, getCalendarPolicy, getDatabaseProduct, getNullCollation, getProduct, getTypeSystem, hasImplicitTableAlias, identifierNeedsToBeQuoted, quoteIdentifier, quoteIdentifier, quoteIdentifier, quoteStringLiteral, quoteStringLiteralUnicode, quoteTimestampLiteral, rewriteSingleValueExpr, supportsAggregateFunction, supportsAliasedValues, supportsFunction, supportsOffsetFetch, supportsWindowFunctions, unparseDateTimeLiteral, unparseFetchUsingAnsi, unparseFetchUsingLimit, unparseOffsetFetch, unparseSqlDatetimeArithmetic, unparseSqlIntervalLiteral, unparseSqlIntervalQualifier, unquoteStringLiteral

Methods inherited from class java.lang.Object

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

Field Detail

POSTGRESQL_TYPE_SYSTEM

private static final RelDataTypeSystem POSTGRESQL_TYPE_SYSTEM

PostgreSQL type system.

DEFAULT

public static final SqlDialect DEFAULT

Constructor Detail

PostgresqlSqlDialect

public PostgresqlSqlDialect(SqlDialect.Context context)

Creates a PostgresqlSqlDialect.

Method Detail

supportsCharSet

public boolean supportsCharSet()

Description copied from class: SqlDialect

Returns whether the dialect supports character set names as part of a data type, for instance VARCHAR(30) CHARACTER SET `ISO-8859-1`.

Overrides:

supportsCharSet in class SqlDialect

getCastSpec

public SqlNode getCastSpec(RelDataType type)

Overrides:

getCastSpec in class SqlDialect

requiresAliasForFromItems

protected boolean requiresAliasForFromItems()

Overrides:

requiresAliasForFromItems in class SqlDialect

supportsNestedAggregations

public boolean supportsNestedAggregations()

Description copied from class: SqlDialect

Returns whether the dialect supports nested aggregations, for instance SELECT SUM(SUM(1)) .

Overrides:

supportsNestedAggregations in class SqlDialect

unparseCall

public void unparseCall(SqlWriter writer,
                        SqlCall call,
                        int leftPrec,
                        int rightPrec)

Overrides:

unparseCall in class SqlDialect