Package org.hibernate.dialect

Class CockroachDialect

java.lang.Object
org.hibernate.dialect.Dialect
org.hibernate.dialect.CockroachDialect
All Implemented Interfaces:
FunctionContributor, TypeContributor, ConversionContext
Direct Known Subclasses:
CockroachDB202SpatialDialect
public class CockroachDialect extends Dialect
A SQL dialect for CockroachDB 21.1 and above.

  • Field Details

  • Constructor Details

  • Method Details

    • fetchDataBaseVersion

      protected static DatabaseVersion fetchDataBaseVersion(DialectResolutionInfo info)

    • parseVersion

      public static DatabaseVersion parseVersion(String versionString)

    • getMinimumSupportedVersion

      protected DatabaseVersion getMinimumSupportedVersion()
      Description copied from class: Dialect
      Get the version of the SQL dialect that is the minimum supported by this implementation.
      Overrides:
      getMinimumSupportedVersion in class Dialect

    • columnType

      protected String columnType(int sqlTypeCode)
      Description copied from class: Dialect
      The database column type name for a given JDBC type code defined in Types or SqlTypes. This default implementation returns the ANSI-standard type name.

      This method may be overridden by concrete Dialects as an alternative to Dialect.registerColumnTypes(TypeContributions, ServiceRegistry) for simple registrations.

      Note that:

      1. Implementations of this method are expected to define a sensible mapping forTypes.NCLOB Types.NCHAR, and Types.NVARCHAR. On some database, these types are simply remapped to CLOB, CHAR, and VARCHAR.
      2. Mappings for Types.TIMESTAMP and Types.TIMESTAMP_WITH_TIMEZONE should support explicit specification of precision if possible.
      3. As specified by DdlTypeRegistry.getDescriptor(int), this method never receives Types.LONGVARCHAR, Types.LONGNVARCHAR, nor Types.LONGVARBINARY, which are considered synonyms for their non-LONG counterparts.
      4. On the other hand, the types SqlTypes.LONG32VARCHAR, SqlTypes.LONG32NVARCHAR, and SqlTypes.LONG32VARBINARY are not synonyms, and implementations of this method must define sensible mappings, for example to database-native TEXT or CLOB types.
      Overrides:
      columnType in class Dialect
      Parameters:
      sqlTypeCode - a SQL type code
      Returns:
      a column type name, with $l, $p, $s placeholders for length, precision, scale
      See Also:

    • castType

      protected String castType(int sqlTypeCode)
      Description copied from class: Dialect
      The SQL type to use in cast( ... as ... ) expressions when casting to the target type represented by the given JDBC type code.
      Overrides:
      castType in class Dialect
      Parameters:
      sqlTypeCode - The JDBC type code representing the target type
      Returns:
      The SQL type to use in cast()

    • registerColumnTypes

      protected void registerColumnTypes(TypeContributions typeContributions, ServiceRegistry serviceRegistry)
      Description copied from class: Dialect
      Register ANSI-standard column types using the length limits defined by Dialect.getMaxVarcharLength(), Dialect.getMaxNVarcharLength(), and Dialect.getMaxVarbinaryLength().

      This method is always called when a Dialect is instantiated.

      Overrides:
      registerColumnTypes in class Dialect

    • resolveSqlTypeDescriptor

      public JdbcType resolveSqlTypeDescriptor(String columnTypeName, int jdbcTypeCode, int precision, int scale, JdbcTypeRegistry jdbcTypeRegistry)
      Description copied from class: Dialect
      Assigns an appropriate JdbcType to a column of a JDBC result set based on the column type name, JDBC type code, precision, and scale.
      Overrides:
      resolveSqlTypeDescriptor in class Dialect
      Parameters:
      columnTypeName - the column type name
      jdbcTypeCode - the type code
      precision - the precision or 0
      scale - the scale or 0
      Returns:
      an appropriate instance of JdbcType

    • resolveSqlTypeCode

      protected Integer resolveSqlTypeCode(String columnTypeName, TypeConfiguration typeConfiguration)
      Description copied from class: Dialect
      Resolves the SqlTypes type code for the given column type name as reported by the database, or null if it can't be resolved.
      Overrides:
      resolveSqlTypeCode in class Dialect

    • contributeTypes

      public void contributeTypes(TypeContributions typeContributions, ServiceRegistry serviceRegistry)
      Description copied from class: Dialect
      A callback which allows the Dialect to contribute types.
      Overrides:
      contributeTypes in class Dialect
      Parameters:
      typeContributions - Callback to contribute the types
      serviceRegistry - The service registry

    • contributeCockroachTypes

      protected void contributeCockroachTypes(TypeContributions typeContributions, ServiceRegistry serviceRegistry)

    • initializeFunctionRegistry

      public void initializeFunctionRegistry(FunctionContributions functionContributions)
      Description copied from class: Dialect
      Initialize the given registry with any dialect-specific functions.

      Support for certain SQL functions is required, and if the database does not support a required function, then the dialect must define a way to emulate it.

      These required functions include the functions defined by the JPA query language specification:

      • avg(arg) - aggregate function
      • count([distinct ]arg) - aggregate function
      • max(arg) - aggregate function
      • min(arg) - aggregate function
      • sum(arg) - aggregate function
      • coalesce(arg0, arg1, ...)
      • nullif(arg0, arg1)
      • lower(arg)
      • upper(arg)
      • length(arg)
      • concat(arg0, arg1, ...)
      • locate(pattern, string[, start])
      • substring(string, start[, length])
      • trim([[spec ][character ]from] string)
      • abs(arg)
      • mod(arg0, arg1)
      • sqrt(arg)
      • current date
      • current time
      • current timestamp
      Along with an additional set of functions defined by ANSI SQL:
      • any(arg) - aggregate function
      • every(arg) - aggregate function
      • var_samp(arg) - aggregate function
      • var_pop(arg) - aggregate function
      • stddev_samp(arg) - aggregate function
      • stddev_pop(arg) - aggregate function
      • cast(arg as Type)
      • extract(field from arg)
      • ln(arg)
      • exp(arg)
      • power(arg0, arg1)
      • floor(arg)
      • ceiling(arg)
      • position(pattern in string)
      • substring(string from start[ for length])
      • overlay(string placing replacement from start[ for length])
      And the following functions for working with java.time types:
      • local date
      • local time
      • local datetime
      • offset datetime
      • instant
      And a number of additional "standard" functions:
      • left(string, length)
      • right(string, length)
      • replace(string, pattern, replacement)
      • pad(string with length spec[ character])
      • repeat(string, times)
      • pi
      • log10(arg)
      • log(base, arg)
      • sign(arg)
      • sin(arg)
      • cos(arg)
      • tan(arg)
      • asin(arg)
      • acos(arg)
      • atan(arg)
      • atan2(arg0, arg1)
      • round(arg0[, arg1])
      • truncate(arg0[, arg1])
      • sinh(arg)
      • tanh(arg)
      • cosh(arg)
      • least(arg0, arg1, ...)
      • greatest(arg0, arg1, ...)
      • degrees(arg)
      • radians(arg)
      • bitand(arg1, arg1)
      • bitor(arg1, arg1)
      • bitxor(arg1, arg1)
      • format(datetime as pattern)
      • collate(string as collation)
      • str(arg) - synonym of cast(a as String)
      • ifnull(arg0, arg1) - synonym of coalesce(a, b)
      Finally, the following functions are defined as abbreviations for extract(), and desugared by the parser:
      • second(arg) - synonym of extract(second from a)
      • minute(arg) - synonym of extract(minute from a)
      • hour(arg) - synonym of extract(hour from a)
      • day(arg) - synonym of extract(day from a)
      • month(arg) - synonym of extract(month from a)
      • year(arg) - synonym of extract(year from a)
      Note that according to this definition, the second() function returns a floating point value, contrary to the integer type returned by the native function with this name on many databases. Thus, we don't just naively map these HQL functions to the native SQL functions with the same names.
      Overrides:
      initializeFunctionRegistry in class Dialect

    • getTimeZoneSupport

      public TimeZoneSupport getTimeZoneSupport()
      Description copied from class: Dialect
      How the dialect supports time zone types like Types.TIMESTAMP_WITH_TIMEZONE.
      Overrides:
      getTimeZoneSupport in class Dialect

    • appendBooleanValueString

      public void appendBooleanValueString(SqlAppender appender, boolean bool)
      Description copied from class: Dialect
      Append the SQL literal expression representing the given boolean value to the given SqlAppender.
      Overrides:
      appendBooleanValueString in class Dialect
      Parameters:
      appender - The SqlAppender to append the literal expression to
      bool - The boolean value

    • getCascadeConstraintsString

      public String getCascadeConstraintsString()
      Description copied from class: Dialect
      The keyword that specifies that a drop table operation should be cascaded to its constraints, typically " cascade" where the leading space is required, or the empty string if there is no such keyword in this dialect.
      Overrides:
      getCascadeConstraintsString in class Dialect
      Returns:
      The cascade drop keyword, if any, with a leading space

    • supportsCurrentTimestampSelection

      public boolean supportsCurrentTimestampSelection()
      Description copied from class: Dialect
      Does this dialect support some way to retrieve the current timestamp value from the database?
      Overrides:
      supportsCurrentTimestampSelection in class Dialect
      Returns:
      True if the current timestamp can be retrieved; false otherwise.

    • isCurrentTimestampSelectStringCallable

      public boolean isCurrentTimestampSelectStringCallable()
      Description copied from class: Dialect
      Is the command returned by Dialect.getCurrentTimestampSelectString() treated as callable?

      Typically, this indicates the use of the JDBC escape syntax.

      Overrides:
      isCurrentTimestampSelectStringCallable in class Dialect
      Returns:
      if the Dialect.getCurrentTimestampSelectString() is treated as callable; false otherwise.

    • getCurrentTimestampSelectString

      public String getCurrentTimestampSelectString()
      Description copied from class: Dialect
      The command used to retrieve the current timestamp from the database.
      Overrides:
      getCurrentTimestampSelectString in class Dialect

    • supportsDistinctFromPredicate

      public boolean supportsDistinctFromPredicate()
      Description copied from class: Dialect
      Does this dialect support some kind of distinct from predicate?

      That is, does it support syntax like: 

       ... where FIRST_NAME IS DISTINCT FROM LAST_NAME
      Overrides:
      supportsDistinctFromPredicate in class Dialect
      Returns:
      True if this SQL dialect is known to support some kind of distinct from predicate; false otherwise

    • supportsIfExistsBeforeTableName

      public boolean supportsIfExistsBeforeTableName()
      Description copied from class: Dialect
      For dropping a table, can the phrase if exists be applied before the table name?
      Overrides:
      supportsIfExistsBeforeTableName in class Dialect
      Returns:
      true if if exists can be applied before the table name

    • supportsIfExistsBeforeConstraintName

      public boolean supportsIfExistsBeforeConstraintName()
      Description copied from class: Dialect
      For dropping a constraint with an alter table statement, can the phrase if exists be applied before the constraint name?
      Overrides:
      supportsIfExistsBeforeConstraintName in class Dialect
      Returns:
      true if if exists can be applied before the constraint name

    • supportsIfExistsAfterAlterTable

      public boolean supportsIfExistsAfterAlterTable()
      Description copied from class: Dialect
      For an alter table, can the phrase if exists be applied?
      Overrides:
      supportsIfExistsAfterAlterTable in class Dialect
      Returns:
      true if if exists can be applied after alter table

    • qualifyIndexName

      public boolean qualifyIndexName()
      Description copied from class: Dialect
      Do we need to qualify index names with the schema name?
      Overrides:
      qualifyIndexName in class Dialect
      Returns:
      true if we do

    • getIdentityColumnSupport

      public IdentityColumnSupport getIdentityColumnSupport()
      Description copied from class: Dialect
      Get the appropriate IdentityColumnSupport for this dialect.
      Overrides:
      getIdentityColumnSupport in class Dialect
      Returns:
      the IdentityColumnSupport

    • supportsValuesList

      public boolean supportsValuesList()
      Description copied from class: Dialect
      Does this dialect support values lists of form VALUES (1), (2), (3)?
      Overrides:
      supportsValuesList in class Dialect
      Returns:
      true if values list are supported

    • supportsPartitionBy

      public boolean supportsPartitionBy()
      Description copied from class: Dialect
      Does is dialect support partition by?
      Overrides:
      supportsPartitionBy in class Dialect

    • supportsNonQueryWithCTE

      public boolean supportsNonQueryWithCTE()
      Description copied from class: Dialect
      Does this dialect support insert, update, and delete statements with Common Table Expressions (CTEs)?
      Overrides:
      supportsNonQueryWithCTE in class Dialect
      Returns:
      true if non-query statements are supported with CTE

    • supportsRecursiveCTE

      public boolean supportsRecursiveCTE()
      Description copied from class: Dialect
      Does this dialect/database support recursive CTEs?
      Overrides:
      supportsRecursiveCTE in class Dialect
      Returns:
      true if recursive CTEs are supported

    • supportsConflictClauseForInsertCTE

      public boolean supportsConflictClauseForInsertCTE()
      Description copied from class: Dialect
      Does this dialect support the conflict clause for insert statements that appear in a CTE?
      Overrides:
      supportsConflictClauseForInsertCTE in class Dialect
      Returns:
      true if conflict clause is supported

    • getNoColumnsInsertString

      public String getNoColumnsInsertString()
      Description copied from class: Dialect
      The fragment used to insert a row without specifying any column values, usually just (), but sometimes default values.
      Overrides:
      getNoColumnsInsertString in class Dialect
      Returns:
      The appropriate empty values clause.

    • getCaseInsensitiveLike

      public String getCaseInsensitiveLike()
      Description copied from class: Dialect
      The name of the SQL operator that performs case-insensitive LIKE comparisons.
      Overrides:
      getCaseInsensitiveLike in class Dialect
      Returns:
      The dialect-specific case-insensitive like operator.

    • supportsCaseInsensitiveLike

      public boolean supportsCaseInsensitiveLike()
      Description copied from class: Dialect
      Does this dialect support case-insensitive LIKE comparisons?
      Overrides:
      supportsCaseInsensitiveLike in class Dialect
      Returns:
      true if the database supports case-insensitive like comparisons, false otherwise. The default is false.

    • supportsNullPrecedence

      public boolean supportsNullPrecedence()
      Description copied from class: Dialect
      Does this dialect support nulls first and nulls last?
      Overrides:
      supportsNullPrecedence in class Dialect

    • getNullOrdering

      public NullOrdering getNullOrdering()
      Description copied from class: Dialect
      Returns the default ordering of null.
      Overrides:
      getNullOrdering in class Dialect

    • supportsTupleCounts

      public boolean supportsTupleCounts()
      Description copied from class: Dialect
      Does this dialect support count(a,b)?
      Overrides:
      supportsTupleCounts in class Dialect
      Returns:
      True if the database supports counting tuples; false otherwise.

    • requiresParensForTupleDistinctCounts

      public boolean requiresParensForTupleDistinctCounts()
      Description copied from class: Dialect
      If Dialect.supportsTupleDistinctCounts() is true, does this dialect require the tuple to be delimited with parentheses?
      Overrides:
      requiresParensForTupleDistinctCounts in class Dialect
      Returns:
      boolean

    • getNativeIdentifierGeneratorStrategy

      public String getNativeIdentifierGeneratorStrategy()
      Description copied from class: Dialect
      The name identifying the "native" id generation strategy for this dialect.

      This is the name of the id generation strategy which should be used when "native" is specified in hbm.xml.

      Overrides:
      getNativeIdentifierGeneratorStrategy in class Dialect
      Returns:
      The name identifying the native generator strategy.

    • getSequenceSupport

      public SequenceSupport getSequenceSupport()
      Description copied from class: Dialect
      Get the appropriate SequenceSupport for this dialect.
      Overrides:
      getSequenceSupport in class Dialect

    • getQuerySequencesString

      public String getQuerySequencesString()
      Description copied from class: Dialect
      Get the select command used retrieve the names of all sequences.
      Overrides:
      getQuerySequencesString in class Dialect
      Returns:
      The select command; or null if sequences are not supported.

    • supportsLobValueChangePropagation

      public boolean supportsLobValueChangePropagation()
      Description copied from class: Dialect
      Does the dialect support propagating changes to LOB values back to the database? Talking about mutating the internal value of the locator, as opposed to supplying a new locator instance.
      Overrides:
      supportsLobValueChangePropagation in class Dialect
      Returns:
      True if the changes are propagated back to the database; false otherwise.

    • getSqlAstTranslatorFactory

      public SqlAstTranslatorFactory getSqlAstTranslatorFactory()
      Description copied from class: Dialect
      Return a SqlAstTranslatorFactory specific to this dialect, or null to use the standard translator.
      Overrides:
      getSqlAstTranslatorFactory in class Dialect
      See Also:

    • getNationalizationSupport

      public NationalizationSupport getNationalizationSupport()
      Description copied from class: Dialect
      Determines whether this database requires the use of explicitly nationalized character (Unicode) data types.

      That is, whether the use of Types.NCHAR, Types.NVARCHAR, and Types.NCLOB is required for nationalized character data.

      Overrides:
      getNationalizationSupport in class Dialect

    • getMaxIdentifierLength

      public int getMaxIdentifierLength()
      Description copied from class: Dialect
      What is the maximum identifier length supported by this dialect?
      Overrides:
      getMaxIdentifierLength in class Dialect
      Returns:
      The maximum length.

    • supportsStandardArrays

      public boolean supportsStandardArrays()
      Description copied from class: Dialect
      Does this database have native support for ANSI SQL standard arrays which are expressed in terms of the element type name: integer array.
      Overrides:
      supportsStandardArrays in class Dialect
      Returns:
      boolean

    • supportsTemporalLiteralOffset

      public boolean supportsTemporalLiteralOffset()
      Description copied from class: Dialect
      Does this dialect supports timezone offsets in temporal literals.
      Overrides:
      supportsTemporalLiteralOffset in class Dialect

    • appendDateTimeLiteral

      public void appendDateTimeLiteral(SqlAppender appender, TemporalAccessor temporalAccessor, TemporalType precision, TimeZone jdbcTimeZone)
      Description copied from class: Dialect
      Append a datetime literal representing the given java.time value to the given SqlAppender.
      Overrides:
      appendDateTimeLiteral in class Dialect

    • appendDateTimeLiteral

      public void appendDateTimeLiteral(SqlAppender appender, Date date, TemporalType precision, TimeZone jdbcTimeZone)
      Description copied from class: Dialect
      Append a datetime literal representing the given Date value to the given SqlAppender.
      Overrides:
      appendDateTimeLiteral in class Dialect

    • appendDateTimeLiteral

      public void appendDateTimeLiteral(SqlAppender appender, Calendar calendar, TemporalType precision, TimeZone jdbcTimeZone)
      Description copied from class: Dialect
      Append a datetime literal representing the given Calendar value to the given SqlAppender.
      Overrides:
      appendDateTimeLiteral in class Dialect

    • extractPattern

      public String extractPattern(TemporalUnit unit)
      The extract() function returns TemporalUnit.DAY_OF_WEEK numbered from 0 to 6. This isn't consistent with what most other databases do, so here we adjust the result by generating (extract(dayofweek,arg)+1)).
      Overrides:
      extractPattern in class Dialect
      Parameters:
      unit - the first argument

    • translateExtractField

      public String translateExtractField(TemporalUnit unit)
      Description copied from class: Dialect
      Return the name used to identify the given field as an argument to the extract() function, or of this dialect's equivalent function.

      This method does not need to handle TemporalUnit.NANOSECOND, TemporalUnit.NATIVE, TemporalUnit.OFFSET, TemporalUnit.DATE, TemporalUnit.TIME, TemporalUnit.WEEK_OF_YEAR, nor TemporalUnit.WEEK_OF_MONTH, which are already desugared by ExtractFunction.

      Overrides:
      translateExtractField in class Dialect

    • getFractionalSecondPrecisionInNanos

      public long getFractionalSecondPrecisionInNanos()
      microsecond is the smallest unit for an interval, and the highest precision for a timestamp.
      Overrides:
      getFractionalSecondPrecisionInNanos in class Dialect
      Returns:
      the precision, specified as a quantity of nanoseconds
      See Also:

    • timestampaddPattern

      public String timestampaddPattern(TemporalUnit unit, TemporalType temporalType, IntervalType intervalType)
      Description copied from class: Dialect
      Obtain a pattern for the SQL equivalent to a timestampadd() function call. The resulting pattern must contain ?1, ?2, and ?3 placeholders for the arguments.
      Overrides:
      timestampaddPattern in class Dialect
      Parameters:
      unit - The unit to add to the temporal
      temporalType - The type of the temporal
      intervalType - The type of interval to add or null if it's not a native interval

    • timestampdiffPattern

      public String timestampdiffPattern(TemporalUnit unit, TemporalType fromTemporalType, TemporalType toTemporalType)
      Description copied from class: Dialect
      Obtain a pattern for the SQL equivalent to a timestampdiff() function call. The resulting pattern must contain ?1, ?2, and ?3 placeholders for the arguments.
      Overrides:
      timestampdiffPattern in class Dialect
      Parameters:
      unit - the first argument
      fromTemporalType - true if the first argument is a timestamp, false if a date
      toTemporalType - true if the second argument is

    • translateDurationField

      public String translateDurationField(TemporalUnit unit)
      Description copied from class: Dialect
      Return the name used to identify the given unit of duration as an argument to #timestampadd() or #timestampdiff(), or of this dialect's equivalent functions.

      This method does not need to handle TemporalUnit.NANOSECOND, TemporalUnit.NATIVE, TemporalUnit.OFFSET, TemporalUnit.DAY_OF_WEEK, TemporalUnit.DAY_OF_MONTH, TemporalUnit.DAY_OF_YEAR, TemporalUnit.DATE, TemporalUnit.TIME, TemporalUnit.TIMEZONE_HOUR, TemporalUnit.TIMEZONE_MINUTE, TemporalUnit.WEEK_OF_YEAR, nor TemporalUnit.WEEK_OF_MONTH, which are not units of duration.

      Overrides:
      translateDurationField in class Dialect

    • appendDatetimeFormat

      public void appendDatetimeFormat(SqlAppender appender, String format)
      Description copied from class: Dialect
      Translate the given datetime format string from the pattern language defined by Java's DateTimeFormatter to whatever pattern language is understood by the native datetime formatting function for this database (often the to_char() function).

      Since it's never possible to translate every pattern letter sequences understood by DateTimeFormatter, only the following subset of pattern letters is accepted by Hibernate:

      • G: era
      • y: year of era
      • Y: year of week-based year
      • M: month of year
      • w: week of week-based year (ISO week number)
      • W: week of month
      • E: day of week (name)
      • e: day of week (number)
      • d: day of month
      • D: day of year
      • a: AM/PM
      • H: hour of day (24 hour time)
      • h: hour of AM/PM (12 hour time)
      • m: minutes
      • s: seconds
      • z,Z,x: timezone offset

      In addition, punctuation characters and single-quoted literal strings are accepted.

      Appends a pattern accepted by the function that formats dates and times in this dialect to a SQL fragment that is being constructed.

      Overrides:
      appendDatetimeFormat in class Dialect

    • getLimitHandler

      public LimitHandler getLimitHandler()
      Description copied from class: Dialect
      Obtain a LimitHandler that implements pagination support for Query.setMaxResults(int) and Query.setFirstResult(int).
      Overrides:
      getLimitHandler in class Dialect

    • getForUpdateString

      public String getForUpdateString(String aliases)
      Description copied from class: Dialect
      Get the FOR UPDATE OF column_list fragment appropriate for this dialect, given the aliases of the columns to be write locked.
      Overrides:
      getForUpdateString in class Dialect
      Parameters:
      aliases - The columns to be write locked.
      Returns:
      The appropriate FOR UPDATE OF column_list clause string.

    • getForUpdateString

      public String getForUpdateString(LockOptions lockOptions)
      Description copied from class: Dialect
      Given a set of LockOptions (lock level, timeout), determine the appropriate for update fragment to use to obtain the lock.
      Overrides:
      getForUpdateString in class Dialect
      Parameters:
      lockOptions - contains the lock mode to apply.
      Returns:
      The appropriate for update fragment.

    • getForUpdateString

      public String getForUpdateString(String aliases, LockOptions lockOptions)
      Description copied from class: Dialect
      Get the FOR UPDATE OF or FOR SHARE OF fragment appropriate for this dialect, given the aliases of the columns to be locked.
      Overrides:
      getForUpdateString in class Dialect
      Parameters:
      aliases - The columns to be locked.
      lockOptions - the lock options to apply
      Returns:
      The appropriate FOR UPDATE OF column_list clause string.

    • getWriteLockString

      public String getWriteLockString(int timeout)
      Description copied from class: Dialect
      Get the string to append to SELECT statements to acquire pessimistic WRITE locks for this dialect.

      Location of the returned string is treated the same as Dialect.getForUpdateString().

      Overrides:
      getWriteLockString in class Dialect
      Parameters:
      timeout - in milliseconds, -1 for indefinite wait and 0 for no wait.
      Returns:
      The appropriate LOCK clause string.

    • getWriteLockString

      public String getWriteLockString(String aliases, int timeout)
      Description copied from class: Dialect
      Get the string to append to SELECT statements to acquire WRITE locks for this dialect, given the aliases of the columns to be write locked.

      Location of the returned string is treated the same as Dialect.getForUpdateString().

      Overrides:
      getWriteLockString in class Dialect
      Parameters:
      aliases - The columns to be read locked.
      timeout - in milliseconds, -1 for indefinite wait and 0 for no wait.
      Returns:
      The appropriate LOCK clause string.

    • getReadLockString

      public String getReadLockString(int timeout)
      Description copied from class: Dialect
      Get the string to append to SELECT statements to acquire READ locks for this dialect.

      Location of the returned string is treated the same as Dialect.getForUpdateString().

      Overrides:
      getReadLockString in class Dialect
      Parameters:
      timeout - in milliseconds, -1 for indefinite wait and 0 for no wait.
      Returns:
      The appropriate LOCK clause string.

    • getReadLockString

      public String getReadLockString(String aliases, int timeout)
      Description copied from class: Dialect
      Get the string to append to SELECT statements to acquire READ locks for this dialect, given the aliases of the columns to be read locked.

      Location of the returned string is treated the same as Dialect.getForUpdateString().

      Overrides:
      getReadLockString in class Dialect
      Parameters:
      aliases - The columns to be read locked.
      timeout - in milliseconds, -1 for indefinite wait and 0 for no wait.
      Returns:
      The appropriate LOCK clause string.

    • getForUpdateNowaitString

      public String getForUpdateNowaitString()
      Description copied from class: Dialect
      Retrieves the FOR UPDATE NOWAIT syntax specific to this dialect.
      Overrides:
      getForUpdateNowaitString in class Dialect
      Returns:
      The appropriate FOR UPDATE NOWAIT clause string.

    • getForUpdateNowaitString

      public String getForUpdateNowaitString(String aliases)
      Description copied from class: Dialect
      Get the FOR UPDATE OF column_list NOWAIT fragment appropriate for this dialect, given the aliases of the columns to be write locked.
      Overrides:
      getForUpdateNowaitString in class Dialect
      Parameters:
      aliases - The columns to be write locked.
      Returns:
      The appropriate FOR UPDATE OF colunm_list NOWAIT clause string.

    • getForUpdateSkipLockedString

      public String getForUpdateSkipLockedString()
      Description copied from class: Dialect
      Retrieves the FOR UPDATE SKIP LOCKED syntax specific to this dialect.
      Overrides:
      getForUpdateSkipLockedString in class Dialect
      Returns:
      The appropriate FOR UPDATE SKIP LOCKED clause string.

    • getForUpdateSkipLockedString

      public String getForUpdateSkipLockedString(String aliases)
      Description copied from class: Dialect
      Get the FOR UPDATE OF column_list SKIP LOCKED fragment appropriate for this dialect, given the aliases of the columns to be write locked.
      Overrides:
      getForUpdateSkipLockedString in class Dialect
      Parameters:
      aliases - The columns to be write locked.
      Returns:
      The appropriate FOR UPDATE colunm_list SKIP LOCKED clause string.

    • supportsOuterJoinForUpdate

      public boolean supportsOuterJoinForUpdate()
      Description copied from class: Dialect
      Does this dialect support FOR UPDATE in conjunction with outer-joined rows?
      Overrides:
      supportsOuterJoinForUpdate in class Dialect
      Returns:
      True if outer-joined rows can be locked via FOR UPDATE.

    • useInputStreamToInsertBlob

      public boolean useInputStreamToInsertBlob()
      Description copied from class: Dialect
      Should LOBs (both BLOB and CLOB) be bound using stream operations, that is, using PreparedStatement.setBinaryStream(int, java.io.InputStream, int)).
      Overrides:
      useInputStreamToInsertBlob in class Dialect
      Returns:
      True if BLOBs and CLOBs should be bound using stream operations.

    • useConnectionToCreateLob

      public boolean useConnectionToCreateLob()
      Description copied from class: Dialect
      Should BLOB, CLOB, and NCLOB be created solely using respectively Connection.createBlob(), Connection.createClob(), and Connection.createNClob().
      Overrides:
      useConnectionToCreateLob in class Dialect
      Returns:
      True if BLOB, CLOB, and NCLOB should be created using JDBC Connection.

    • supportsOffsetInSubquery

      public boolean supportsOffsetInSubquery()
      Description copied from class: Dialect
      Does this dialect support offset in subqueries?

      For example: 

       select * from Table1 where col1 in (select col1 from Table2 order by col2 limit 1 offset 1)
      Overrides:
      supportsOffsetInSubquery in class Dialect
      Returns:
      true if it does

    • supportsWindowFunctions

      public boolean supportsWindowFunctions()
      Description copied from class: Dialect
      Does this dialect support window functions like row_number() over (..)?
      Overrides:
      supportsWindowFunctions in class Dialect
      Returns:
      true if the underlying database supports window functions, false otherwise. The default is false.

    • supportsLateral

      public boolean supportsLateral()
      Description copied from class: Dialect
      Does this dialect support the SQL lateral keyword or a proprietary alternative?
      Overrides:
      supportsLateral in class Dialect
      Returns:
      true if the underlying database supports lateral, false otherwise. The default is false.

    • supportsNoWait

      public boolean supportsNoWait()
      Description copied from class: Dialect
      Does this dialect support NO_WAIT timeout.
      Overrides:
      supportsNoWait in class Dialect
      Returns:
      true if NO_WAIT is supported

    • supportsWait

      public boolean supportsWait()
      Description copied from class: Dialect
      Does this dialect support WAIT timeout.
      Overrides:
      supportsWait in class Dialect
      Returns:
      true if WAIT is supported

    • supportsSkipLocked

      public boolean supportsSkipLocked()
      Description copied from class: Dialect
      Does this dialect support SKIP_LOCKED timeout.
      Overrides:
      supportsSkipLocked in class Dialect
      Returns:
      true if SKIP_LOCKED is supported

    • getFunctionalDependencyAnalysisSupport

      public FunctionalDependencyAnalysisSupport getFunctionalDependencyAnalysisSupport()
      Description copied from class: Dialect
      Get this dialect's level of support for primary key functional dependency analysis within GROUP BY and ORDER BY clauses.
      Overrides:
      getFunctionalDependencyAnalysisSupport in class Dialect

    • getWriteRowLockStrategy

      public RowLockStrategy getWriteRowLockStrategy()
      Description copied from class: Dialect
      The row lock strategy to use for write locks.
      Overrides:
      getWriteRowLockStrategy in class Dialect

    • getNameQualifierSupport

      public NameQualifierSupport getNameQualifierSupport()
      Description copied from class: Dialect
      The support for qualified identifiers.

      By default, decide based on DatabaseMetaData.

      Overrides:
      getNameQualifierSupport in class Dialect
      Returns:
      The NameQualifierSupport, or null to use DatabaseMetaData.

    • buildIdentifierHelper

      public IdentifierHelper buildIdentifierHelper(IdentifierHelperBuilder builder, DatabaseMetaData dbMetaData) throws SQLException
      Description copied from class: Dialect
      The IdentifierHelper indicated by this dialect for handling identifier conversions. Returning null is allowed and indicates that Hibernate should fall back to building a "standard" helper. In the fallback path, any changes made to the IdentifierHelperBuilder during this call will still be incorporated into the built IdentifierHelper.

      The incoming builder will have the following set:

      By default, Hibernate will do the following:

      Overrides:
      buildIdentifierHelper in class Dialect
      Parameters:
      builder - A partially-configured IdentifierHelperBuilder.
      dbMetaData - Access to the metadata returned from the driver if needed and if available. WARNING: it may be null.
      Returns:
      The IdentifierHelper instance to use, or null to indicate Hibernate should use its fallback path
      Throws:
      SQLException - Accessing the DatabaseMetaData can throw it. Just rethrow and Hibernate will handle it.
      See Also:

    • getViolatedConstraintNameExtractor

      public ViolatedConstraintNameExtractor getViolatedConstraintNameExtractor()
      Description copied from class: Dialect
      A ViolatedConstraintNameExtractor for extracting the name of a violated constraint from a SQLException.
      Specified by:
      getViolatedConstraintNameExtractor in interface ConversionContext
      Overrides:
      getViolatedConstraintNameExtractor in class Dialect

    • buildSQLExceptionConversionDelegate

      public SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate()
      Description copied from class: Dialect
      An instance of SQLExceptionConversionDelegate for interpreting dialect-specific error or SQLState codes.

      If this method is overridden to return a non-null value, the default SQLExceptionConverter will use the returned SQLExceptionConversionDelegate in addition to the following standard delegates:

      1. a "static" delegate based on the JDBC4-defined SQLException hierarchy, and
      2. a delegate that interprets SQLState codes as either X/Open or SQL-2003 codes, depending on what is reported by the JDBC driver.

      It is strongly recommended that every Dialect implementation override this method, since interpretation of a SQL error is much more accurate when based on the vendor-specific error code, rather than on the SQLState.

      Overrides:
      buildSQLExceptionConversionDelegate in class Dialect
      Returns:
      The SQLExceptionConversionDelegate for this dialect

    • getQueryHintString

      public String getQueryHintString(String query, List<String> hintList)
      Applies the hints to the query string. The hints can be index selection hints or join hints.

      For index selection hints, use the format <tablename>@{FORCE_INDEX=<index>[,<DIRECTION>]} where the optional DIRECTION is either ASC (ascending) or DESC (descending). Multiple index hints can be provided. The effect is that in the final SQL statement the hint is added to the table name mentioned in the hint.

      For join hints, use the format "<MERGE|HASH|LOOKUP|INVERTED> JOIN". Only one join hint will be added. It is applied to all join statements in the SQL statement.

      Hints are only added to select statements.

      Overrides:
      getQueryHintString in class Dialect
      Parameters:
      query - The query to which to apply the hint.
      hintList - The hints to apply
      Returns:
      the query with hints added

    • getDefaultIntervalSecondScale

      public int getDefaultIntervalSecondScale()
      Description copied from class: Dialect
      This is the default scale for a generated column of type INTERVAL SECOND mapped to a Duration.

      Usually 9 (nanoseconds) or 6 (microseconds).

      Overrides:
      getDefaultIntervalSecondScale in class Dialect
      Returns:
      the default scale, in decimal digits, of the fractional seconds field
      See Also:

    • getDmlTargetColumnQualifierSupport

      public DmlTargetColumnQualifierSupport getDmlTargetColumnQualifierSupport()
      Description copied from class: Dialect
      Get the minimum DmlTargetColumnQualifierSupport required by this dialect.
      Overrides:
      getDmlTargetColumnQualifierSupport in class Dialect
      Returns:
      the column qualifier support required by this dialect

    • supportsFromClauseInUpdate

      public boolean supportsFromClauseInUpdate()
      Description copied from class: Dialect
      Does this dialect support the from clause for update statements?
      Overrides:
      supportsFromClauseInUpdate in class Dialect
      Returns:
      true if from clause is supported