Module jakarta.json

Package com.exasol.adapter.dialects.exasol

Class ExasolColumnMetadataReader

java.lang.Object

com.exasol.adapter.jdbc.AbstractMetadataReader

com.exasol.adapter.jdbc.BaseColumnMetadataReader

com.exasol.adapter.dialects.exasol.ExasolColumnMetadataReader

All Implemented Interfaces:

com.exasol.adapter.jdbc.ColumnMetadataReader, com.exasol.adapter.jdbc.MetadataReader

public class ExasolColumnMetadataReader
extends com.exasol.adapter.jdbc.BaseColumnMetadataReader

This class implements Exasol-specific reading of column metadata.

Field Summary

Fields inherited from class com.exasol.adapter.jdbc.BaseColumnMetadataReader

AUTOINCREMENT_COLUMN, CHAR_OCTET_LENGTH_COLUMN, DATA_TYPE_COLUMN, DEFAULT_VALUE_COLUMN, LOGGER, NAME_COLUMN, NULLABLE_COLUMN, REMARKS_COLUMN, SCALE_COLUMN, SIZE_COLUMN, TYPE_NAME_COLUMN

Fields inherited from class com.exasol.adapter.jdbc.AbstractMetadataReader

connection, properties

Constructor Summary

Constructors

Constructor	Description
ExasolColumnMetadataReader(Connection connection, com.exasol.adapter.AdapterProperties properties, com.exasol.adapter.dialects.IdentifierConverter identifierConverter)	Create a new instance of the ExasolColumnMetadataReader.

Method Summary

Modifier and Type	Method	Description
protected int	extractSrid(String typeDescriptionString)	Extract the spacial reference system identifier (SRID) from a type description.
com.exasol.adapter.metadata.DataType	mapJdbcType(com.exasol.adapter.jdbc.JDBCTypeDescription jdbcTypeDescription)
com.exasol.adapter.jdbc.JDBCTypeDescription	readJdbcTypeDescription(ResultSet remoteColumn)

Methods inherited from class com.exasol.adapter.jdbc.BaseColumnMetadataReader

convertDecimal, getColumnsFromResultSet, getNumberTypeFromProperty, isRemoteColumnNullable, mapColumnName, mapColumns, mapColumns, mapJdbcTypeNumericToDecimalWithFallbackToDouble, mapOrSkipColumn, readColumnName

Methods inherited from class com.exasol.adapter.jdbc.AbstractMetadataReader

getCatalogNameFilter, getSchemaNameFilter

Methods inherited from class java.lang.Object

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

Constructor Detail

ExasolColumnMetadataReader

public ExasolColumnMetadataReader(Connection connection,
                                  com.exasol.adapter.AdapterProperties properties,
                                  com.exasol.adapter.dialects.IdentifierConverter identifierConverter)

Create a new instance of the ExasolColumnMetadataReader.

Parameters:

connection - JDBC connection through which the column metadata is read from the remote database

properties - user-defined adapter properties

identifierConverter - converter between source and Exasol identifiers

Method Detail

mapJdbcType

public com.exasol.adapter.metadata.DataType mapJdbcType(com.exasol.adapter.jdbc.JDBCTypeDescription jdbcTypeDescription)

Specified by:

mapJdbcType in interface com.exasol.adapter.jdbc.ColumnMetadataReader

Overrides:

mapJdbcType in class com.exasol.adapter.jdbc.BaseColumnMetadataReader

readJdbcTypeDescription

public com.exasol.adapter.jdbc.JDBCTypeDescription readJdbcTypeDescription(ResultSet remoteColumn)
                                                                    throws SQLException

Overrides:

readJdbcTypeDescription in class com.exasol.adapter.jdbc.BaseColumnMetadataReader

Throws:

SQLException

extractSrid

protected int extractSrid(String typeDescriptionString)

Extract the spacial reference system identifier (SRID) from a type description.

Parameters:

typeDescriptionString - a type description like GEOMETRY(1234) or GEOMETRY.

Returns:

the SRID from the type description or the default value DEFAULT_SPACIAL_REFERENCE_SYSTEM_IDENTIFIER