org.pentaho.aggdes.model

Interface Dialect

public interface Dialect

Description of the capabilities of a database, its SQL dialect, and driver.

Field Summary

Fields

Modifier and Type	Field and Description
static String	NL

Method Summary

Methods

Modifier and Type	Method and Description
void	comment(StringBuilder buf, String s) Appends a single-line comment to a string builder.
String	getDoubleTypeString() Returns the SQL type string for integer values.
String	getIntegerTypeString() Returns the SQL type string for integer values.
int	getMaximumColumnNameLength() Returns the maximum length of a column name.
int	getMaximumTableNameLength() Returns the maximum length of a table name.
void	quoteIdentifier(StringBuilder buf, String... names) Appends to a buffer one or more identifiers, quoted appropriately for this Dialect.
String	removeInvalidIdentifierCharacters(String str)
boolean	supportsPrecision(DatabaseMetaData meta, String type) Returns true if database column ddl supports precision , ie INT(10) vs.
void	terminateCommand(StringBuilder buf) Terminates a SQL command.

Field Detail

NL

static final String NL

Method Detail

quoteIdentifier

void quoteIdentifier(StringBuilder buf,
                   String... names)

Appends to a buffer one or more identifiers, quoted appropriately for this Dialect.

For example, in the SQL Server dialect, quoteIdentifier(buf, "foo", "bar baz") generates "[foo].[bar baz]".

Parameters:

buf - Buffer

names - One of more identifers

getIntegerTypeString

String getIntegerTypeString()

Returns the SQL type string for integer values.

This value is assumed to the be type returned by the COUNT() aggregate function. Typically "INTEGER".

Returns:

integer type string

getDoubleTypeString

String getDoubleTypeString()

Returns the SQL type string for integer values.

This value is assumed to the be type returned by the SUM() and AVG() aggregate functions. Typically "DOUBLE".

Returns:

double type string

removeInvalidIdentifierCharacters

String removeInvalidIdentifierCharacters(String str)

getMaximumTableNameLength

int getMaximumTableNameLength()

Returns the maximum length of a table name.

Returns:

maximum length of a table name

getMaximumColumnNameLength

int getMaximumColumnNameLength()

Returns the maximum length of a column name.

Returns:

maximum length of a column name

comment

void comment(StringBuilder buf,
           String s)

Appends a single-line comment to a string builder.

Parameters:

s - String

buf - String builder

terminateCommand

void terminateCommand(StringBuilder buf)

Terminates a SQL command.

For most dialects, this appends ";{newline}" to buf.

Parameters:

buf - String builder

supportsPrecision

boolean supportsPrecision(DatabaseMetaData meta,
                        String type)
                          throws SQLException

Returns true if database column ddl supports precision , ie INT(10) vs. INT

Parameters:

meta - database metadata object

type - the type of the column

Returns:

true if supports precision

Throws:

SQLException