org.eclipse.dirigible.database.sql

Interface ISqlDialect<SELECT extends SelectBuilder,INSERT extends InsertBuilder,UPDATE extends UpdateBuilder,DELETE extends DeleteBuilder,CREATE extends CreateBranchingBuilder,DROP extends DropBranchingBuilder,NEXT extends NextValueSequenceBuilder,LAST extends LastValueIdentityBuilder>

Type Parameters:

SELECT - the generic type

INSERT - the generic type

UPDATE - the generic type

DELETE - the generic type

CREATE - the generic type

DROP - the generic type

NEXT - the generic type

All Superinterfaces:

ISqlFactory<SELECT,INSERT,UPDATE,DELETE,CREATE,DROP,NEXT,LAST>, ISqlKeywords

All Known Implementing Classes:

DefaultSqlDialect, DerbySqlDialect, H2SqlDialect, HanaSqlDialect, MySQLSqlDialect, PostgresSqlDialect, SybaseSqlDialect

public interface ISqlDialect<SELECT extends SelectBuilder,INSERT extends InsertBuilder,UPDATE extends UpdateBuilder,DELETE extends DeleteBuilder,CREATE extends CreateBranchingBuilder,DROP extends DropBranchingBuilder,NEXT extends NextValueSequenceBuilder,LAST extends LastValueIdentityBuilder>
extends ISqlFactory<SELECT,INSERT,UPDATE,DELETE,CREATE,DROP,NEXT,LAST>, ISqlKeywords

The SQL Dialect interface.

Field Summary

Fields inherited from interface org.eclipse.dirigible.database.sql.ISqlKeywords

ALTER, CLOSE, COMMA, EQUALS, FUNCTION_CURRENT_DATE, FUNCTION_CURRENT_TIME, FUNCTION_CURRENT_TIMESTAMP, KEYWORD_AND, KEYWORD_AS, KEYWORD_ASC, KEYWORD_CHECK, KEYWORD_COLUMN, KEYWORD_CONSTRAINT, KEYWORD_CREATE, KEYWORD_DELETE, KEYWORD_DESC, KEYWORD_DISTINCT, KEYWORD_DROP, KEYWORD_FETCH, KEYWORD_FOR_UPDATE, KEYWORD_FOREIGN, KEYWORD_FROM, KEYWORD_FULL, KEYWORD_GROUP_BY, KEYWORD_HAVING, KEYWORD_IDENTITY, KEYWORD_INDEX, KEYWORD_INNER, KEYWORD_INSERT, KEYWORD_INTO, KEYWORD_JOIN, KEYWORD_KEY, KEYWORD_LEFT, KEYWORD_LIMIT, KEYWORD_NEXT, KEYWORD_NEXT_VALUE_FOR, KEYWORD_NOT, KEYWORD_NULL, KEYWORD_OFFSET, KEYWORD_ON, KEYWORD_ONLY, KEYWORD_OR, KEYWORD_ORDER_BY, KEYWORD_OUTER, KEYWORD_PRIMARY, KEYWORD_REFERENCES, KEYWORD_RIGHT, KEYWORD_ROWS, KEYWORD_SELECT, KEYWORD_SEQUENCE, KEYWORD_SET, KEYWORD_START, KEYWORD_TABLE, KEYWORD_UNION, KEYWORD_UNIQUE, KEYWORD_UPDATE, KEYWORD_VALUES, KEYWORD_VIEW, KEYWORD_WHERE, KEYWORD_WITH, METADATA_ALIAS, METADATA_GLOBAL_TEMPORARY, METADATA_LOCAL_TEMPORARY, METADATA_SYNONYM, METADATA_SYSTEM_TABLE, METADATA_TABLE, METADATA_TABLE_TYPES, METADATA_VIEW, OPEN, QUESTION, SPACE, STAR, TABLE, UNDERSCROE

Method Summary

Modifier and Type	Method and Description
int	count(Connection connection, String table) Returns the count of rows in the given table.
boolean	exists(Connection connection, String table) Check existence of a table.
String	functionCurrentDate() Gives the dialect specific name of the CURRENT_DATE function.
String	functionCurrentTime() Gives the dialect specific name of the CURRENT_TIME function.
String	functionCurrentTimestamp() Gives the dialect specific name of the CURRENT_TIMESTAMP function.
String	getDatabaseName(Connection connection) Returns the database name
String	getDataTypeName(DataType dataType) Default implementation returns the direct toString() conversion.
String	getIdentityArgument() Identity argument for a column for the create table script Default is "IDENTITY".
String	getNotNullArgument() NOT NULL argument for a column for the create table script Default is "NOT NULL".
String	getPrimaryKeyArgument() PRIMARY KEY argument for a column for the create table script Default is "PRIMARY KEY".
String	getSchemaFilterScript() If the database supports schema filtering SQL statements (see isSchemaFilterSupported()), this method provides the corresponding SQL statement.
String	getUniqueArgument() UNIQUE argument for a column for the create table script Default is "UNIQUE".
boolean	isCatalogForSchema() Does this database support catalogs synonymous to schemas.
boolean	isSchemaFilterSupported() Checks if the database is capable of schema-level filtering statements (e.g.
boolean	isSequenceSupported() Checks if the database is capable to create and use Sequences.

Methods inherited from interface org.eclipse.dirigible.database.sql.ISqlFactory

create, delete, drop, expression, insert, lastval, nextval, select, update

Method Detail

getDataTypeName

String getDataTypeName(DataType dataType)

Default implementation returns the direct toString() conversion. It may get overridden for specific database dialects

Parameters:

dataType - the data type

Returns:

the data type name

getPrimaryKeyArgument

String getPrimaryKeyArgument()

PRIMARY KEY argument for a column for the create table script Default is "PRIMARY KEY".

Returns:

the primary key argument

getIdentityArgument

String getIdentityArgument()

Identity argument for a column for the create table script Default is "IDENTITY".

Returns:

the primary key argument

getNotNullArgument

String getNotNullArgument()

NOT NULL argument for a column for the create table script Default is "NOT NULL".

Returns:

the not null argument

getUniqueArgument

String getUniqueArgument()

UNIQUE argument for a column for the create table script Default is "UNIQUE".

Returns:

the unique argument

exists

boolean exists(Connection connection,
               String table)
        throws SQLException

Check existence of a table.

Specified by:

exists in interface ISqlFactory<SELECT extends SelectBuilder,INSERT extends InsertBuilder,UPDATE extends UpdateBuilder,DELETE extends DeleteBuilder,CREATE extends CreateBranchingBuilder,DROP extends DropBranchingBuilder,NEXT extends NextValueSequenceBuilder,LAST extends LastValueIdentityBuilder>

Parameters:

connection - the current connection

table - the table name

Returns:

true if the table exists and false otherwise

Throws:

SQLException - the SQL exception

count

int count(Connection connection,
          String table)
   throws SQLException

Returns the count of rows in the given table.

Specified by:

count in interface ISqlFactory<SELECT extends SelectBuilder,INSERT extends InsertBuilder,UPDATE extends UpdateBuilder,DELETE extends DeleteBuilder,CREATE extends CreateBranchingBuilder,DROP extends DropBranchingBuilder,NEXT extends NextValueSequenceBuilder,LAST extends LastValueIdentityBuilder>

Parameters:

connection - the current connection

table - the table name

Returns:

count of rows

Throws:

SQLException - the SQL exception

isSchemaFilterSupported

boolean isSchemaFilterSupported()

Checks if the database is capable of schema-level filtering statements (e.g. to reduce the provisioned schemas down to those that the current user is entitled to see).

Returns:

true if the feature is supported , false otherwise

getSchemaFilterScript

String getSchemaFilterScript()

If the database supports schema filtering SQL statements (see isSchemaFilterSupported()), this method provides the corresponding SQL statement.

Returns:

a filtering SQL statement

isCatalogForSchema

boolean isCatalogForSchema()

Does this database support catalogs synonymous to schemas.

Returns:

whether it is a catalog for schema

functionCurrentDate

String functionCurrentDate()

Gives the dialect specific name of the CURRENT_DATE function.

Returns:

the name of the function

functionCurrentTime

String functionCurrentTime()

Gives the dialect specific name of the CURRENT_TIME function.

Returns:

the name of the function

functionCurrentTimestamp

String functionCurrentTimestamp()

Gives the dialect specific name of the CURRENT_TIMESTAMP function.

Returns:

the name of the function

isSequenceSupported

boolean isSequenceSupported()

Checks if the database is capable to create and use Sequences.

Returns:

true if the feature is supported , false otherwise

getDatabaseName

String getDatabaseName(Connection connection)

Returns the database name

Parameters:

connection - the active database connection

Returns:

the database name