gudusoft.gsqlparser.ext.catalog

Interface Column

All Known Implementing Classes:

SimpleCatalog.SimpleColumn

public interface Column

Represents a column in a database table.

Originally derived from Apache Calcite's catalog interfaces.

Method Summary

Modifier and Type	Method and Description
String	getComment() Returns the comment or description of the column.
Integer	getDecimalDigits() Returns the number of decimal digits (for numeric types).
String	getDefaultValue() Returns the default value of the column.
String	getName() Returns the name of the column.
int	getOrdinalPosition() Returns the ordinal position of the column in the table (1-based).
Integer	getSize() Returns the column size (e.g., VARCHAR length, INTEGER precision).
String	getTypeName() Returns the SQL type name of the column (e.g., "VARCHAR", "INTEGER", "DECIMAL").
boolean	isNullable() Returns whether the column allows NULL values.

Method Detail

getName

String getName()

Returns the name of the column.

Returns:

Column name

getTypeName

String getTypeName()

Returns the SQL type name of the column (e.g., "VARCHAR", "INTEGER", "DECIMAL").

Returns:

SQL type name

getOrdinalPosition

int getOrdinalPosition()

Returns the ordinal position of the column in the table (1-based).

Returns:

Ordinal position

isNullable

boolean isNullable()

Returns whether the column allows NULL values.

Returns:

true if nullable, false otherwise

getSize

Integer getSize()

Returns the column size (e.g., VARCHAR length, INTEGER precision).

Returns:

Column size, or null if not applicable

getDecimalDigits

Integer getDecimalDigits()

Returns the number of decimal digits (for numeric types).

Returns:

Decimal digits, or null if not applicable

getDefaultValue

String getDefaultValue()

Returns the default value of the column.

Returns:

Default value, or null if none

getComment

String getComment()

Returns the comment or description of the column.

Returns:

Column comment, or null if none