IoTDBDatabaseMetadata (IoTDB Jdbc 0.9.1 API)

java.lang.Object
- org.apache.iotdb.jdbc.IoTDBDatabaseMetadata

All Implemented Interfaces:: DatabaseMetaData, Wrapper

public class IoTDBDatabaseMetadata
extends Object
implements DatabaseMetaData

Field Summary
- Fields inherited from interface java.sql.DatabaseMetaData
  attributeNoNulls, attributeNullable, attributeNullableUnknown, bestRowNotPseudo, bestRowPseudo, bestRowSession, bestRowTemporary, bestRowTransaction, bestRowUnknown, columnNoNulls, columnNullable, columnNullableUnknown, functionColumnIn, functionColumnInOut, functionColumnOut, functionColumnResult, functionColumnUnknown, functionNoNulls, functionNoTable, functionNullable, functionNullableUnknown, functionResultUnknown, functionReturn, functionReturnsTable, importedKeyCascade, importedKeyInitiallyDeferred, importedKeyInitiallyImmediate, importedKeyNoAction, importedKeyNotDeferrable, importedKeyRestrict, importedKeySetDefault, importedKeySetNull, procedureColumnIn, procedureColumnInOut, procedureColumnOut, procedureColumnResult, procedureColumnReturn, procedureColumnUnknown, procedureNoNulls, procedureNoResult, procedureNullable, procedureNullableUnknown, procedureResultUnknown, procedureReturnsResult, sqlStateSQL, sqlStateSQL99, sqlStateXOpen, tableIndexClustered, tableIndexHashed, tableIndexOther, tableIndexStatistic, typeNoNulls, typeNullable, typeNullableUnknown, typePredBasic, typePredChar, typePredNone, typeSearchable, versionColumnNotPseudo, versionColumnPseudo, versionColumnUnknown

Method Summary

All Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`boolean`	`allProceduresAreCallable()`
`boolean`	`allTablesAreSelectable()`
`boolean`	`autoCommitFailureClosesAllResultSets()`
`boolean`	`dataDefinitionCausesTransactionCommit()`
`boolean`	`dataDefinitionIgnoredInTransactions()`
`boolean`	`deletesAreDetected(int arg0)`
`boolean`	`doesMaxRowSizeIncludeBlobs()`
`boolean`	`generatedKeyAlwaysReturned()`
`ResultSet`	`getAttributes(String arg0, String arg1, String arg2, String arg3)`
`ResultSet`	`getBestRowIdentifier(String arg0, String arg1, String arg2, int arg3, boolean arg4)`
`ResultSet`	`getCatalogs()`
`String`	`getCatalogSeparator()`
`String`	`getCatalogTerm()`
`ResultSet`	`getClientInfoProperties()`
`ResultSet`	`getColumnPrivileges(String arg0, String arg1, String arg2, String arg3)`
`ResultSet`	`getColumns(String catalog, String schemaPattern, String columnPattern, String devicePattern)`
`Connection`	`getConnection()`
`ResultSet`	`getCrossReference(String arg0, String arg1, String arg2, String arg3, String arg4, String arg5)`
`int`	`getDatabaseMajorVersion()`
`int`	`getDatabaseMinorVersion()`
`String`	`getDatabaseProductName()`
`String`	`getDatabaseProductVersion()`
`int`	`getDefaultTransactionIsolation()`
`int`	`getDriverMajorVersion()`
`int`	`getDriverMinorVersion()`
`String`	`getDriverName()`
`String`	`getDriverVersion()`
`ResultSet`	`getExportedKeys(String arg0, String arg1, String arg2)`
`String`	`getExtraNameCharacters()`
`ResultSet`	`getFunctionColumns(String arg0, String arg1, String arg2, String arg3)`
`ResultSet`	`getFunctions(String arg0, String arg1, String arg2)`
`String`	`getIdentifierQuoteString()`
`ResultSet`	`getImportedKeys(String arg0, String arg1, String arg2)`
`ResultSet`	`getIndexInfo(String arg0, String arg1, String arg2, boolean arg3, boolean arg4)`
`int`	`getJDBCMajorVersion()`
`int`	`getJDBCMinorVersion()`
`int`	`getMaxBinaryLiteralLength()`
`int`	`getMaxCatalogNameLength()`
`int`	`getMaxCharLiteralLength()`
`int`	`getMaxColumnNameLength()`
`int`	`getMaxColumnsInGroupBy()`
`int`	`getMaxColumnsInIndex()`
`int`	`getMaxColumnsInOrderBy()`
`int`	`getMaxColumnsInSelect()`
`int`	`getMaxColumnsInTable()`
`int`	`getMaxConnections()`
`int`	`getMaxCursorNameLength()`
`int`	`getMaxIndexLength()`
`int`	`getMaxProcedureNameLength()`
`int`	`getMaxRowSize()`
`int`	`getMaxSchemaNameLength()`
`int`	`getMaxStatementLength()`
`int`	`getMaxStatements()`
`int`	`getMaxTableNameLength()`
`int`	`getMaxTablesInSelect()`
`int`	`getMaxUserNameLength()`
`String`	`getMetadataInJson()`
`String`	`getNumericFunctions()`
`ResultSet`	`getPrimaryKeys(String arg0, String arg1, String arg2)`
`ResultSet`	`getProcedureColumns(String arg0, String arg1, String arg2, String arg3)`
`ResultSet`	`getProcedures(String arg0, String arg1, String arg2)`
`String`	`getProcedureTerm()`
`ResultSet`	`getPseudoColumns(String catalog, String schemaPattern, String tableNamePattern, String columnNamePattern)`
`int`	`getResultSetHoldability()`
`RowIdLifetime`	`getRowIdLifetime()`
`ResultSet`	`getSchemas()`
`ResultSet`	`getSchemas(String catalog, String schemaPattern)`
`String`	`getSchemaTerm()`
`String`	`getSearchStringEscape()`
`String`	`getSQLKeywords()`
`int`	`getSQLStateType()`
`String`	`getStringFunctions()`
`ResultSet`	`getSuperTables(String catalog, String schemaPattern, String tableNamePattern)`
`ResultSet`	`getSuperTypes(String catalog, String schemaPattern, String typeNamePattern)`
`String`	`getSystemFunctions()`
`ResultSet`	`getTablePrivileges(String catalog, String schemaPattern, String tableNamePattern)`
`ResultSet`	`getTables(String catalog, String schemaPattern, String tableNamePattern, String[] types)`
`ResultSet`	`getTableTypes()`
`String`	`getTimeDateFunctions()`
`ResultSet`	`getTypeInfo()`
`ResultSet`	`getUDTs(String catalog, String schemaPattern, String typeNamePattern, int[] types)`
`String`	`getURL()`
`String`	`getUserName()`
`ResultSet`	`getVersionColumns(String catalog, String schema, String table)`
`boolean`	`insertsAreDetected(int type)`
`boolean`	`isCatalogAtStart()`
`boolean`	`isReadOnly()`
`boolean`	`isWrapperFor(Class<?> arg0)`
`boolean`	`locatorsUpdateCopy()`
`boolean`	`nullPlusNonNullIsNull()`
`boolean`	`nullsAreSortedAtEnd()`
`boolean`	`nullsAreSortedAtStart()`
`boolean`	`nullsAreSortedHigh()`
`boolean`	`nullsAreSortedLow()`
`boolean`	`othersDeletesAreVisible(int type)`
`boolean`	`othersInsertsAreVisible(int type)`
`boolean`	`othersUpdatesAreVisible(int type)`
`boolean`	`ownDeletesAreVisible(int type)`
`boolean`	`ownInsertsAreVisible(int type)`
`boolean`	`ownUpdatesAreVisible(int type)`
`boolean`	`storesLowerCaseIdentifiers()`
`boolean`	`storesLowerCaseQuotedIdentifiers()`
`boolean`	`storesMixedCaseIdentifiers()`
`boolean`	`storesMixedCaseQuotedIdentifiers()`
`boolean`	`storesUpperCaseIdentifiers()`
`boolean`	`storesUpperCaseQuotedIdentifiers()`
`boolean`	`supportsAlterTableWithAddColumn()`
`boolean`	`supportsAlterTableWithDropColumn()`
`boolean`	`supportsANSI92EntryLevelSQL()`
`boolean`	`supportsANSI92FullSQL()`
`boolean`	`supportsANSI92IntermediateSQL()`
`boolean`	`supportsBatchUpdates()`
`boolean`	`supportsCatalogsInDataManipulation()`
`boolean`	`supportsCatalogsInIndexDefinitions()`
`boolean`	`supportsCatalogsInPrivilegeDefinitions()`
`boolean`	`supportsCatalogsInProcedureCalls()`
`boolean`	`supportsCatalogsInTableDefinitions()`
`boolean`	`supportsColumnAliasing()`
`boolean`	`supportsConvert()`
`boolean`	`supportsConvert(int fromType, int toType)`
`boolean`	`supportsCoreSQLGrammar()`
`boolean`	`supportsCorrelatedSubqueries()`
`boolean`	`supportsDataDefinitionAndDataManipulationTransactions()`
`boolean`	`supportsDataManipulationTransactionsOnly()`
`boolean`	`supportsDifferentTableCorrelationNames()`
`boolean`	`supportsExpressionsInOrderBy()`
`boolean`	`supportsExtendedSQLGrammar()`
`boolean`	`supportsFullOuterJoins()`
`boolean`	`supportsGetGeneratedKeys()`
`boolean`	`supportsGroupBy()`
`boolean`	`supportsGroupByBeyondSelect()`
`boolean`	`supportsGroupByUnrelated()`
`boolean`	`supportsIntegrityEnhancementFacility()`
`boolean`	`supportsLikeEscapeClause()`
`boolean`	`supportsLimitedOuterJoins()`
`boolean`	`supportsMinimumSQLGrammar()`
`boolean`	`supportsMixedCaseIdentifiers()`
`boolean`	`supportsMixedCaseQuotedIdentifiers()`
`boolean`	`supportsMultipleOpenResults()`
`boolean`	`supportsMultipleResultSets()`
`boolean`	`supportsMultipleTransactions()`
`boolean`	`supportsNamedParameters()`
`boolean`	`supportsNonNullableColumns()`
`boolean`	`supportsOpenCursorsAcrossCommit()`
`boolean`	`supportsOpenCursorsAcrossRollback()`
`boolean`	`supportsOpenStatementsAcrossCommit()`
`boolean`	`supportsOpenStatementsAcrossRollback()`
`boolean`	`supportsOrderByUnrelated()`
`boolean`	`supportsOuterJoins()`
`boolean`	`supportsPositionedDelete()`
`boolean`	`supportsPositionedUpdate()`
`boolean`	`supportsResultSetConcurrency(int type, int concurrency)`
`boolean`	`supportsResultSetHoldability(int holdability)`
`boolean`	`supportsResultSetType(int type)`
`boolean`	`supportsSavepoints()`
`boolean`	`supportsSchemasInDataManipulation()`
`boolean`	`supportsSchemasInIndexDefinitions()`
`boolean`	`supportsSchemasInPrivilegeDefinitions()`
`boolean`	`supportsSchemasInProcedureCalls()`
`boolean`	`supportsSchemasInTableDefinitions()`
`boolean`	`supportsSelectForUpdate()`
`boolean`	`supportsStatementPooling()`
`boolean`	`supportsStoredFunctionsUsingCallSyntax()`
`boolean`	`supportsStoredProcedures()`
`boolean`	`supportsSubqueriesInComparisons()`
`boolean`	`supportsSubqueriesInExists()`
`boolean`	`supportsSubqueriesInIns()`
`boolean`	`supportsSubqueriesInQuantifieds()`
`boolean`	`supportsTableCorrelationNames()`
`boolean`	`supportsTransactionIsolationLevel(int level)`
`boolean`	`supportsTransactions()`
`boolean`	`supportsUnion()`
`boolean`	`supportsUnionAll()`
`String`	`toString()` Deprecated. recommend using getMetadataInJson() instead of toString()
`<T> T`	`unwrap(Class<T> iface)`
`boolean`	`updatesAreDetected(int type)`
`boolean`	`usesLocalFilePerTable()`
`boolean`	`usesLocalFiles()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.sql.DatabaseMetaData
getMaxLogicalLobSize, supportsRefCursors

Method Detail

getColumns

public ResultSet getColumns(String catalog,
                            String schemaPattern,
                            String columnPattern,
                            String devicePattern)
                     throws SQLException

Specified by:: getColumns in interface DatabaseMetaData
Throws:: SQLException

isWrapperFor

public boolean isWrapperFor(Class<?> arg0)
                     throws SQLException

Specified by:: isWrapperFor in interface Wrapper
Throws:: SQLException

unwrap

public <T> T unwrap(Class<T> iface)
             throws SQLException

Specified by:: unwrap in interface Wrapper
Throws:: SQLException

allProceduresAreCallable
```
public boolean allProceduresAreCallable()
                                 throws SQLException
```
Specified by:

allProceduresAreCallable in interface DatabaseMetaData

Throws:

SQLException

allTablesAreSelectable
```
public boolean allTablesAreSelectable()
                               throws SQLException
```
Specified by:

allTablesAreSelectable in interface DatabaseMetaData

Throws:

SQLException

autoCommitFailureClosesAllResultSets
```
public boolean autoCommitFailureClosesAllResultSets()
                                             throws SQLException
```
Specified by:

autoCommitFailureClosesAllResultSets in interface DatabaseMetaData

Throws:

SQLException

dataDefinitionCausesTransactionCommit
```
public boolean dataDefinitionCausesTransactionCommit()
                                              throws SQLException
```
Specified by:

dataDefinitionCausesTransactionCommit in interface DatabaseMetaData

Throws:

SQLException

dataDefinitionIgnoredInTransactions
```
public boolean dataDefinitionIgnoredInTransactions()
                                            throws SQLException
```
Specified by:

dataDefinitionIgnoredInTransactions in interface DatabaseMetaData

Throws:

SQLException

deletesAreDetected
```
public boolean deletesAreDetected(int arg0)
                           throws SQLException
```
Specified by:

deletesAreDetected in interface DatabaseMetaData

Throws:

SQLException

doesMaxRowSizeIncludeBlobs
```
public boolean doesMaxRowSizeIncludeBlobs()
                                   throws SQLException
```
Specified by:

doesMaxRowSizeIncludeBlobs in interface DatabaseMetaData

Throws:

SQLException

generatedKeyAlwaysReturned
```
public boolean generatedKeyAlwaysReturned()
                                   throws SQLException
```
Specified by:

generatedKeyAlwaysReturned in interface DatabaseMetaData

Throws:

SQLException

getAttributes

public ResultSet getAttributes(String arg0,
                               String arg1,
                               String arg2,
                               String arg3)
                        throws SQLException

Specified by:: getAttributes in interface DatabaseMetaData
Throws:: SQLException

getBestRowIdentifier

public ResultSet getBestRowIdentifier(String arg0,
                                      String arg1,
                                      String arg2,
                                      int arg3,
                                      boolean arg4)
                               throws SQLException

Specified by:: getBestRowIdentifier in interface DatabaseMetaData
Throws:: SQLException

getCatalogSeparator
```
public String getCatalogSeparator()
                           throws SQLException
```
Specified by:

getCatalogSeparator in interface DatabaseMetaData

Throws:

SQLException

getCatalogTerm
```
public String getCatalogTerm()
                      throws SQLException
```
Specified by:

getCatalogTerm in interface DatabaseMetaData

Throws:

SQLException

getCatalogs
```
public ResultSet getCatalogs()
                      throws SQLException
```
Specified by:

getCatalogs in interface DatabaseMetaData

Throws:

SQLException

getClientInfoProperties
```
public ResultSet getClientInfoProperties()
                                  throws SQLException
```
Specified by:

getClientInfoProperties in interface DatabaseMetaData

Throws:

SQLException

getColumnPrivileges

public ResultSet getColumnPrivileges(String arg0,
                                     String arg1,
                                     String arg2,
                                     String arg3)
                              throws SQLException

Specified by:: getColumnPrivileges in interface DatabaseMetaData
Throws:: SQLException

getConnection
```
public Connection getConnection()
```
Specified by:

getConnection in interface DatabaseMetaData

getCrossReference

public ResultSet getCrossReference(String arg0,
                                   String arg1,
                                   String arg2,
                                   String arg3,
                                   String arg4,
                                   String arg5)
                            throws SQLException

Specified by:: getCrossReference in interface DatabaseMetaData
Throws:: SQLException

getDatabaseMajorVersion
```
public int getDatabaseMajorVersion()
```
Specified by:

getDatabaseMajorVersion in interface DatabaseMetaData

getDatabaseMinorVersion
```
public int getDatabaseMinorVersion()
```
Specified by:

getDatabaseMinorVersion in interface DatabaseMetaData

getDatabaseProductName
```
public String getDatabaseProductName()
```
Specified by:

getDatabaseProductName in interface DatabaseMetaData

getDatabaseProductVersion
```
public String getDatabaseProductVersion()
                                 throws SQLException
```
Specified by:

getDatabaseProductVersion in interface DatabaseMetaData

Throws:

SQLException

getDefaultTransactionIsolation
```
public int getDefaultTransactionIsolation()
```
Specified by:

getDefaultTransactionIsolation in interface DatabaseMetaData

getDriverMajorVersion
```
public int getDriverMajorVersion()
```
Specified by:

getDriverMajorVersion in interface DatabaseMetaData

getDriverMinorVersion
```
public int getDriverMinorVersion()
```
Specified by:

getDriverMinorVersion in interface DatabaseMetaData

getDriverName
```
public String getDriverName()
                     throws SQLException
```
Specified by:

getDriverName in interface DatabaseMetaData

Throws:

SQLException

getDriverVersion
```
public String getDriverVersion()
                        throws SQLException
```
Specified by:

getDriverVersion in interface DatabaseMetaData

Throws:

SQLException

getExportedKeys

public ResultSet getExportedKeys(String arg0,
                                 String arg1,
                                 String arg2)
                          throws SQLException

Specified by:: getExportedKeys in interface DatabaseMetaData
Throws:: SQLException

getExtraNameCharacters
```
public String getExtraNameCharacters()
                              throws SQLException
```
Specified by:

getExtraNameCharacters in interface DatabaseMetaData

Throws:

SQLException

getFunctionColumns

public ResultSet getFunctionColumns(String arg0,
                                    String arg1,
                                    String arg2,
                                    String arg3)
                             throws SQLException

Specified by:: getFunctionColumns in interface DatabaseMetaData
Throws:: SQLException

getFunctions

public ResultSet getFunctions(String arg0,
                              String arg1,
                              String arg2)
                       throws SQLException

Specified by:: getFunctions in interface DatabaseMetaData
Throws:: SQLException

getIdentifierQuoteString
```
public String getIdentifierQuoteString()
                                throws SQLException
```
Specified by:

getIdentifierQuoteString in interface DatabaseMetaData

Throws:

SQLException

getImportedKeys

public ResultSet getImportedKeys(String arg0,
                                 String arg1,
                                 String arg2)
                          throws SQLException

Specified by:: getImportedKeys in interface DatabaseMetaData
Throws:: SQLException

getIndexInfo

public ResultSet getIndexInfo(String arg0,
                              String arg1,
                              String arg2,
                              boolean arg3,
                              boolean arg4)
                       throws SQLException

Specified by:: getIndexInfo in interface DatabaseMetaData
Throws:: SQLException

getJDBCMajorVersion
```
public int getJDBCMajorVersion()
```
Specified by:

getJDBCMajorVersion in interface DatabaseMetaData

getJDBCMinorVersion
```
public int getJDBCMinorVersion()
```
Specified by:

getJDBCMinorVersion in interface DatabaseMetaData

getMaxBinaryLiteralLength
```
public int getMaxBinaryLiteralLength()
```
Specified by:

getMaxBinaryLiteralLength in interface DatabaseMetaData

getMaxCatalogNameLength
```
public int getMaxCatalogNameLength()
```
Specified by:

getMaxCatalogNameLength in interface DatabaseMetaData

getMaxCharLiteralLength
```
public int getMaxCharLiteralLength()
```
Specified by:

getMaxCharLiteralLength in interface DatabaseMetaData

getMaxColumnNameLength
```
public int getMaxColumnNameLength()
```
Specified by:

getMaxColumnNameLength in interface DatabaseMetaData

getMaxColumnsInGroupBy
```
public int getMaxColumnsInGroupBy()
```
Specified by:

getMaxColumnsInGroupBy in interface DatabaseMetaData

getMaxColumnsInIndex
```
public int getMaxColumnsInIndex()
```
Specified by:

getMaxColumnsInIndex in interface DatabaseMetaData

getMaxColumnsInOrderBy
```
public int getMaxColumnsInOrderBy()
```
Specified by:

getMaxColumnsInOrderBy in interface DatabaseMetaData

getMaxColumnsInSelect
```
public int getMaxColumnsInSelect()
```
Specified by:

getMaxColumnsInSelect in interface DatabaseMetaData

getMaxColumnsInTable
```
public int getMaxColumnsInTable()
```
Specified by:

getMaxColumnsInTable in interface DatabaseMetaData

getMaxConnections
```
public int getMaxConnections()
```
Specified by:

getMaxConnections in interface DatabaseMetaData

getMaxCursorNameLength
```
public int getMaxCursorNameLength()
```
Specified by:

getMaxCursorNameLength in interface DatabaseMetaData

getMaxIndexLength
```
public int getMaxIndexLength()
```
Specified by:

getMaxIndexLength in interface DatabaseMetaData

getMaxProcedureNameLength
```
public int getMaxProcedureNameLength()
```
Specified by:

getMaxProcedureNameLength in interface DatabaseMetaData

getMaxRowSize
```
public int getMaxRowSize()
```
Specified by:

getMaxRowSize in interface DatabaseMetaData

getMaxSchemaNameLength
```
public int getMaxSchemaNameLength()
```
Specified by:

getMaxSchemaNameLength in interface DatabaseMetaData

getMaxStatementLength
```
public int getMaxStatementLength()
```
Specified by:

getMaxStatementLength in interface DatabaseMetaData

getMaxStatements
```
public int getMaxStatements()
```
Specified by:

getMaxStatements in interface DatabaseMetaData

getMaxTableNameLength
```
public int getMaxTableNameLength()
```
Specified by:

getMaxTableNameLength in interface DatabaseMetaData

getMaxTablesInSelect
```
public int getMaxTablesInSelect()
```
Specified by:

getMaxTablesInSelect in interface DatabaseMetaData

getMaxUserNameLength
```
public int getMaxUserNameLength()
```
Specified by:

getMaxUserNameLength in interface DatabaseMetaData

getNumericFunctions
```
public String getNumericFunctions()
                           throws SQLException
```
Specified by:

getNumericFunctions in interface DatabaseMetaData

Throws:

SQLException

getPrimaryKeys

public ResultSet getPrimaryKeys(String arg0,
                                String arg1,
                                String arg2)
                         throws SQLException

Specified by:: getPrimaryKeys in interface DatabaseMetaData
Throws:: SQLException

getProcedureColumns

public ResultSet getProcedureColumns(String arg0,
                                     String arg1,
                                     String arg2,
                                     String arg3)
                              throws SQLException

Specified by:: getProcedureColumns in interface DatabaseMetaData
Throws:: SQLException

getProcedureTerm
```
public String getProcedureTerm()
                        throws SQLException
```
Specified by:

getProcedureTerm in interface DatabaseMetaData

Throws:

SQLException

getProcedures

public ResultSet getProcedures(String arg0,
                               String arg1,
                               String arg2)
                        throws SQLException

Specified by:: getProcedures in interface DatabaseMetaData
Throws:: SQLException

getPseudoColumns

public ResultSet getPseudoColumns(String catalog,
                                  String schemaPattern,
                                  String tableNamePattern,
                                  String columnNamePattern)
                           throws SQLException

Specified by:: getPseudoColumns in interface DatabaseMetaData
Throws:: SQLException

getResultSetHoldability
```
public int getResultSetHoldability()
```
Specified by:

getResultSetHoldability in interface DatabaseMetaData

getRowIdLifetime

public RowIdLifetime getRowIdLifetime()
                               throws SQLException

Specified by:: getRowIdLifetime in interface DatabaseMetaData
Throws:: SQLException

getSQLKeywords
```
public String getSQLKeywords()
                      throws SQLException
```
Specified by:

getSQLKeywords in interface DatabaseMetaData

Throws:

SQLException

getSQLStateType
```
public int getSQLStateType()
```
Specified by:

getSQLStateType in interface DatabaseMetaData

getSchemaTerm
```
public String getSchemaTerm()
                     throws SQLException
```
Specified by:

getSchemaTerm in interface DatabaseMetaData

Throws:

SQLException

getSchemas
```
public ResultSet getSchemas()
                     throws SQLException
```
Specified by:

getSchemas in interface DatabaseMetaData

Throws:

SQLException

getSchemas

public ResultSet getSchemas(String catalog,
                            String schemaPattern)
                     throws SQLException

Specified by:: getSchemas in interface DatabaseMetaData
Throws:: SQLException

getSearchStringEscape
```
public String getSearchStringEscape()
                             throws SQLException
```
Specified by:

getSearchStringEscape in interface DatabaseMetaData

Throws:

SQLException

getStringFunctions
```
public String getStringFunctions()
                          throws SQLException
```
Specified by:

getStringFunctions in interface DatabaseMetaData

Throws:

SQLException

getSuperTables

public ResultSet getSuperTables(String catalog,
                                String schemaPattern,
                                String tableNamePattern)
                         throws SQLException

Specified by:: getSuperTables in interface DatabaseMetaData
Throws:: SQLException

getSuperTypes

public ResultSet getSuperTypes(String catalog,
                               String schemaPattern,
                               String typeNamePattern)
                        throws SQLException

Specified by:: getSuperTypes in interface DatabaseMetaData
Throws:: SQLException

getSystemFunctions
```
public String getSystemFunctions()
                          throws SQLException
```
Specified by:

getSystemFunctions in interface DatabaseMetaData

Throws:

SQLException

getTablePrivileges

public ResultSet getTablePrivileges(String catalog,
                                    String schemaPattern,
                                    String tableNamePattern)
                             throws SQLException

Specified by:: getTablePrivileges in interface DatabaseMetaData
Throws:: SQLException

getTableTypes
```
public ResultSet getTableTypes()
                        throws SQLException
```
Specified by:

getTableTypes in interface DatabaseMetaData

Throws:

SQLException

getTables

public ResultSet getTables(String catalog,
                           String schemaPattern,
                           String tableNamePattern,
                           String[] types)
                    throws SQLException

Specified by:: getTables in interface DatabaseMetaData
Throws:: SQLException

getTimeDateFunctions
```
public String getTimeDateFunctions()
                            throws SQLException
```
Specified by:

getTimeDateFunctions in interface DatabaseMetaData

Throws:

SQLException

getTypeInfo
```
public ResultSet getTypeInfo()
                      throws SQLException
```
Specified by:

getTypeInfo in interface DatabaseMetaData

Throws:

SQLException

getUDTs

public ResultSet getUDTs(String catalog,
                         String schemaPattern,
                         String typeNamePattern,
                         int[] types)
                  throws SQLException

Specified by:: getUDTs in interface DatabaseMetaData
Throws:: SQLException

getURL
```
public String getURL()
```
Specified by:

getURL in interface DatabaseMetaData

getUserName
```
public String getUserName()
                   throws SQLException
```
Specified by:

getUserName in interface DatabaseMetaData

Throws:

SQLException

getVersionColumns

public ResultSet getVersionColumns(String catalog,
                                   String schema,
                                   String table)
                            throws SQLException

Specified by:: getVersionColumns in interface DatabaseMetaData
Throws:: SQLException

insertsAreDetected
```
public boolean insertsAreDetected(int type)
                           throws SQLException
```
Specified by:

insertsAreDetected in interface DatabaseMetaData

Throws:

SQLException

isCatalogAtStart
```
public boolean isCatalogAtStart()
                         throws SQLException
```
Specified by:

isCatalogAtStart in interface DatabaseMetaData

Throws:

SQLException

isReadOnly
```
public boolean isReadOnly()
                   throws SQLException
```
Specified by:

isReadOnly in interface DatabaseMetaData

Throws:

SQLException

locatorsUpdateCopy
```
public boolean locatorsUpdateCopy()
                           throws SQLException
```
Specified by:

locatorsUpdateCopy in interface DatabaseMetaData

Throws:

SQLException

nullPlusNonNullIsNull
```
public boolean nullPlusNonNullIsNull()
                              throws SQLException
```
Specified by:

nullPlusNonNullIsNull in interface DatabaseMetaData

Throws:

SQLException

nullsAreSortedAtEnd
```
public boolean nullsAreSortedAtEnd()
                            throws SQLException
```
Specified by:

nullsAreSortedAtEnd in interface DatabaseMetaData

Throws:

SQLException

nullsAreSortedAtStart
```
public boolean nullsAreSortedAtStart()
                              throws SQLException
```
Specified by:

nullsAreSortedAtStart in interface DatabaseMetaData

Throws:

SQLException

nullsAreSortedHigh
```
public boolean nullsAreSortedHigh()
                           throws SQLException
```
Specified by:

nullsAreSortedHigh in interface DatabaseMetaData

Throws:

SQLException

nullsAreSortedLow
```
public boolean nullsAreSortedLow()
                          throws SQLException
```
Specified by:

nullsAreSortedLow in interface DatabaseMetaData

Throws:

SQLException

othersDeletesAreVisible
```
public boolean othersDeletesAreVisible(int type)
                                throws SQLException
```
Specified by:

othersDeletesAreVisible in interface DatabaseMetaData

Throws:

SQLException

othersInsertsAreVisible
```
public boolean othersInsertsAreVisible(int type)
                                throws SQLException
```
Specified by:

othersInsertsAreVisible in interface DatabaseMetaData

Throws:

SQLException

othersUpdatesAreVisible
```
public boolean othersUpdatesAreVisible(int type)
                                throws SQLException
```
Specified by:

othersUpdatesAreVisible in interface DatabaseMetaData

Throws:

SQLException

ownDeletesAreVisible
```
public boolean ownDeletesAreVisible(int type)
                             throws SQLException
```
Specified by:

ownDeletesAreVisible in interface DatabaseMetaData

Throws:

SQLException

ownInsertsAreVisible
```
public boolean ownInsertsAreVisible(int type)
                             throws SQLException
```
Specified by:

ownInsertsAreVisible in interface DatabaseMetaData

Throws:

SQLException

ownUpdatesAreVisible
```
public boolean ownUpdatesAreVisible(int type)
                             throws SQLException
```
Specified by:

ownUpdatesAreVisible in interface DatabaseMetaData

Throws:

SQLException

storesLowerCaseIdentifiers
```
public boolean storesLowerCaseIdentifiers()
                                   throws SQLException
```
Specified by:

storesLowerCaseIdentifiers in interface DatabaseMetaData

Throws:

SQLException

storesLowerCaseQuotedIdentifiers
```
public boolean storesLowerCaseQuotedIdentifiers()
                                         throws SQLException
```
Specified by:

storesLowerCaseQuotedIdentifiers in interface DatabaseMetaData

Throws:

SQLException

storesMixedCaseIdentifiers
```
public boolean storesMixedCaseIdentifiers()
                                   throws SQLException
```
Specified by:

storesMixedCaseIdentifiers in interface DatabaseMetaData

Throws:

SQLException

storesMixedCaseQuotedIdentifiers
```
public boolean storesMixedCaseQuotedIdentifiers()
                                         throws SQLException
```
Specified by:

storesMixedCaseQuotedIdentifiers in interface DatabaseMetaData

Throws:

SQLException

storesUpperCaseIdentifiers
```
public boolean storesUpperCaseIdentifiers()
                                   throws SQLException
```
Specified by:

storesUpperCaseIdentifiers in interface DatabaseMetaData

Throws:

SQLException

storesUpperCaseQuotedIdentifiers
```
public boolean storesUpperCaseQuotedIdentifiers()
                                         throws SQLException
```
Specified by:

storesUpperCaseQuotedIdentifiers in interface DatabaseMetaData

Throws:

SQLException

supportsANSI92EntryLevelSQL
```
public boolean supportsANSI92EntryLevelSQL()
                                    throws SQLException
```
Specified by:

supportsANSI92EntryLevelSQL in interface DatabaseMetaData

Throws:

SQLException

supportsANSI92FullSQL
```
public boolean supportsANSI92FullSQL()
                              throws SQLException
```
Specified by:

supportsANSI92FullSQL in interface DatabaseMetaData

Throws:

SQLException

supportsANSI92IntermediateSQL
```
public boolean supportsANSI92IntermediateSQL()
                                      throws SQLException
```
Specified by:

supportsANSI92IntermediateSQL in interface DatabaseMetaData

Throws:

SQLException

supportsAlterTableWithAddColumn
```
public boolean supportsAlterTableWithAddColumn()
                                        throws SQLException
```
Specified by:

supportsAlterTableWithAddColumn in interface DatabaseMetaData

Throws:

SQLException

supportsAlterTableWithDropColumn
```
public boolean supportsAlterTableWithDropColumn()
                                         throws SQLException
```
Specified by:

supportsAlterTableWithDropColumn in interface DatabaseMetaData

Throws:

SQLException

supportsBatchUpdates
```
public boolean supportsBatchUpdates()
                             throws SQLException
```
Specified by:

supportsBatchUpdates in interface DatabaseMetaData

Throws:

SQLException

supportsCatalogsInDataManipulation
```
public boolean supportsCatalogsInDataManipulation()
                                           throws SQLException
```
Specified by:

supportsCatalogsInDataManipulation in interface DatabaseMetaData

Throws:

SQLException

supportsCatalogsInIndexDefinitions
```
public boolean supportsCatalogsInIndexDefinitions()
                                           throws SQLException
```
Specified by:

supportsCatalogsInIndexDefinitions in interface DatabaseMetaData

Throws:

SQLException

supportsCatalogsInPrivilegeDefinitions
```
public boolean supportsCatalogsInPrivilegeDefinitions()
                                               throws SQLException
```
Specified by:

supportsCatalogsInPrivilegeDefinitions in interface DatabaseMetaData

Throws:

SQLException

supportsCatalogsInProcedureCalls
```
public boolean supportsCatalogsInProcedureCalls()
                                         throws SQLException
```
Specified by:

supportsCatalogsInProcedureCalls in interface DatabaseMetaData

Throws:

SQLException

supportsCatalogsInTableDefinitions
```
public boolean supportsCatalogsInTableDefinitions()
                                           throws SQLException
```
Specified by:

supportsCatalogsInTableDefinitions in interface DatabaseMetaData

Throws:

SQLException

supportsColumnAliasing
```
public boolean supportsColumnAliasing()
                               throws SQLException
```
Specified by:

supportsColumnAliasing in interface DatabaseMetaData

Throws:

SQLException

supportsConvert
```
public boolean supportsConvert()
                        throws SQLException
```
Specified by:

supportsConvert in interface DatabaseMetaData

Throws:

SQLException

supportsConvert

public boolean supportsConvert(int fromType,
                               int toType)
                        throws SQLException

Specified by:: supportsConvert in interface DatabaseMetaData
Throws:: SQLException

supportsCoreSQLGrammar
```
public boolean supportsCoreSQLGrammar()
                               throws SQLException
```
Specified by:

supportsCoreSQLGrammar in interface DatabaseMetaData

Throws:

SQLException

supportsCorrelatedSubqueries
```
public boolean supportsCorrelatedSubqueries()
                                     throws SQLException
```
Specified by:

supportsCorrelatedSubqueries in interface DatabaseMetaData

Throws:

SQLException

supportsDataDefinitionAndDataManipulationTransactions
```
public boolean supportsDataDefinitionAndDataManipulationTransactions()
                                                              throws SQLException
```
Specified by:

supportsDataDefinitionAndDataManipulationTransactions in interface DatabaseMetaData

Throws:

SQLException

supportsDataManipulationTransactionsOnly
```
public boolean supportsDataManipulationTransactionsOnly()
                                                 throws SQLException
```
Specified by:

supportsDataManipulationTransactionsOnly in interface DatabaseMetaData

Throws:

SQLException

supportsDifferentTableCorrelationNames
```
public boolean supportsDifferentTableCorrelationNames()
                                               throws SQLException
```
Specified by:

supportsDifferentTableCorrelationNames in interface DatabaseMetaData

Throws:

SQLException

supportsExpressionsInOrderBy
```
public boolean supportsExpressionsInOrderBy()
                                     throws SQLException
```
Specified by:

supportsExpressionsInOrderBy in interface DatabaseMetaData

Throws:

SQLException

supportsExtendedSQLGrammar
```
public boolean supportsExtendedSQLGrammar()
                                   throws SQLException
```
Specified by:

supportsExtendedSQLGrammar in interface DatabaseMetaData

Throws:

SQLException

supportsFullOuterJoins
```
public boolean supportsFullOuterJoins()
                               throws SQLException
```
Specified by:

supportsFullOuterJoins in interface DatabaseMetaData

Throws:

SQLException

supportsGetGeneratedKeys
```
public boolean supportsGetGeneratedKeys()
                                 throws SQLException
```
Specified by:

supportsGetGeneratedKeys in interface DatabaseMetaData

Throws:

SQLException

supportsGroupBy
```
public boolean supportsGroupBy()
                        throws SQLException
```
Specified by:

supportsGroupBy in interface DatabaseMetaData

Throws:

SQLException

supportsGroupByBeyondSelect
```
public boolean supportsGroupByBeyondSelect()
                                    throws SQLException
```
Specified by:

supportsGroupByBeyondSelect in interface DatabaseMetaData

Throws:

SQLException

supportsGroupByUnrelated
```
public boolean supportsGroupByUnrelated()
                                 throws SQLException
```
Specified by:

supportsGroupByUnrelated in interface DatabaseMetaData

Throws:

SQLException

supportsIntegrityEnhancementFacility
```
public boolean supportsIntegrityEnhancementFacility()
                                             throws SQLException
```
Specified by:

supportsIntegrityEnhancementFacility in interface DatabaseMetaData

Throws:

SQLException

supportsLikeEscapeClause
```
public boolean supportsLikeEscapeClause()
                                 throws SQLException
```
Specified by:

supportsLikeEscapeClause in interface DatabaseMetaData

Throws:

SQLException

supportsLimitedOuterJoins
```
public boolean supportsLimitedOuterJoins()
                                  throws SQLException
```
Specified by:

supportsLimitedOuterJoins in interface DatabaseMetaData

Throws:

SQLException

supportsMinimumSQLGrammar
```
public boolean supportsMinimumSQLGrammar()
                                  throws SQLException
```
Specified by:

supportsMinimumSQLGrammar in interface DatabaseMetaData

Throws:

SQLException

supportsMixedCaseIdentifiers
```
public boolean supportsMixedCaseIdentifiers()
                                     throws SQLException
```
Specified by:

supportsMixedCaseIdentifiers in interface DatabaseMetaData

Throws:

SQLException

supportsMixedCaseQuotedIdentifiers
```
public boolean supportsMixedCaseQuotedIdentifiers()
                                           throws SQLException
```
Specified by:

supportsMixedCaseQuotedIdentifiers in interface DatabaseMetaData

Throws:

SQLException

supportsMultipleOpenResults
```
public boolean supportsMultipleOpenResults()
                                    throws SQLException
```
Specified by:

supportsMultipleOpenResults in interface DatabaseMetaData

Throws:

SQLException

supportsMultipleResultSets
```
public boolean supportsMultipleResultSets()
                                   throws SQLException
```
Specified by:

supportsMultipleResultSets in interface DatabaseMetaData

Throws:

SQLException

supportsMultipleTransactions
```
public boolean supportsMultipleTransactions()
                                     throws SQLException
```
Specified by:

supportsMultipleTransactions in interface DatabaseMetaData

Throws:

SQLException

supportsNamedParameters
```
public boolean supportsNamedParameters()
                                throws SQLException
```
Specified by:

supportsNamedParameters in interface DatabaseMetaData

Throws:

SQLException

supportsNonNullableColumns
```
public boolean supportsNonNullableColumns()
                                   throws SQLException
```
Specified by:

supportsNonNullableColumns in interface DatabaseMetaData

Throws:

SQLException

supportsOpenCursorsAcrossCommit
```
public boolean supportsOpenCursorsAcrossCommit()
                                        throws SQLException
```
Specified by:

supportsOpenCursorsAcrossCommit in interface DatabaseMetaData

Throws:

SQLException

supportsOpenCursorsAcrossRollback
```
public boolean supportsOpenCursorsAcrossRollback()
                                          throws SQLException
```
Specified by:

supportsOpenCursorsAcrossRollback in interface DatabaseMetaData

Throws:

SQLException

supportsOpenStatementsAcrossCommit
```
public boolean supportsOpenStatementsAcrossCommit()
                                           throws SQLException
```
Specified by:

supportsOpenStatementsAcrossCommit in interface DatabaseMetaData

Throws:

SQLException

supportsOpenStatementsAcrossRollback
```
public boolean supportsOpenStatementsAcrossRollback()
                                             throws SQLException
```
Specified by:

supportsOpenStatementsAcrossRollback in interface DatabaseMetaData

Throws:

SQLException

supportsOrderByUnrelated
```
public boolean supportsOrderByUnrelated()
                                 throws SQLException
```
Specified by:

supportsOrderByUnrelated in interface DatabaseMetaData

Throws:

SQLException

supportsOuterJoins
```
public boolean supportsOuterJoins()
                           throws SQLException
```
Specified by:

supportsOuterJoins in interface DatabaseMetaData

Throws:

SQLException

supportsPositionedDelete
```
public boolean supportsPositionedDelete()
                                 throws SQLException
```
Specified by:

supportsPositionedDelete in interface DatabaseMetaData

Throws:

SQLException

supportsPositionedUpdate
```
public boolean supportsPositionedUpdate()
                                 throws SQLException
```
Specified by:

supportsPositionedUpdate in interface DatabaseMetaData

Throws:

SQLException

supportsResultSetConcurrency

public boolean supportsResultSetConcurrency(int type,
                                            int concurrency)
                                     throws SQLException

Specified by:: supportsResultSetConcurrency in interface DatabaseMetaData
Throws:: SQLException

supportsResultSetHoldability

public boolean supportsResultSetHoldability(int holdability)
                                     throws SQLException

Specified by:: supportsResultSetHoldability in interface DatabaseMetaData
Throws:: SQLException

supportsResultSetType
```
public boolean supportsResultSetType(int type)
                              throws SQLException
```
Specified by:

supportsResultSetType in interface DatabaseMetaData

Throws:

SQLException

supportsSavepoints
```
public boolean supportsSavepoints()
                           throws SQLException
```
Specified by:

supportsSavepoints in interface DatabaseMetaData

Throws:

SQLException

supportsSchemasInDataManipulation
```
public boolean supportsSchemasInDataManipulation()
                                          throws SQLException
```
Specified by:

supportsSchemasInDataManipulation in interface DatabaseMetaData

Throws:

SQLException

supportsSchemasInIndexDefinitions
```
public boolean supportsSchemasInIndexDefinitions()
                                          throws SQLException
```
Specified by:

supportsSchemasInIndexDefinitions in interface DatabaseMetaData

Throws:

SQLException

supportsSchemasInPrivilegeDefinitions
```
public boolean supportsSchemasInPrivilegeDefinitions()
                                              throws SQLException
```
Specified by:

supportsSchemasInPrivilegeDefinitions in interface DatabaseMetaData

Throws:

SQLException

supportsSchemasInProcedureCalls
```
public boolean supportsSchemasInProcedureCalls()
                                        throws SQLException
```
Specified by:

supportsSchemasInProcedureCalls in interface DatabaseMetaData

Throws:

SQLException

supportsSchemasInTableDefinitions
```
public boolean supportsSchemasInTableDefinitions()
                                          throws SQLException
```
Specified by:

supportsSchemasInTableDefinitions in interface DatabaseMetaData

Throws:

SQLException

supportsSelectForUpdate
```
public boolean supportsSelectForUpdate()
                                throws SQLException
```
Specified by:

supportsSelectForUpdate in interface DatabaseMetaData

Throws:

SQLException

supportsStatementPooling
```
public boolean supportsStatementPooling()
                                 throws SQLException
```
Specified by:

supportsStatementPooling in interface DatabaseMetaData

Throws:

SQLException

supportsStoredFunctionsUsingCallSyntax
```
public boolean supportsStoredFunctionsUsingCallSyntax()
                                               throws SQLException
```
Specified by:

supportsStoredFunctionsUsingCallSyntax in interface DatabaseMetaData

Throws:

SQLException

supportsStoredProcedures
```
public boolean supportsStoredProcedures()
                                 throws SQLException
```
Specified by:

supportsStoredProcedures in interface DatabaseMetaData

Throws:

SQLException

supportsSubqueriesInComparisons
```
public boolean supportsSubqueriesInComparisons()
                                        throws SQLException
```
Specified by:

supportsSubqueriesInComparisons in interface DatabaseMetaData

Throws:

SQLException

supportsSubqueriesInExists
```
public boolean supportsSubqueriesInExists()
                                   throws SQLException
```
Specified by:

supportsSubqueriesInExists in interface DatabaseMetaData

Throws:

SQLException

supportsSubqueriesInIns
```
public boolean supportsSubqueriesInIns()
                                throws SQLException
```
Specified by:

supportsSubqueriesInIns in interface DatabaseMetaData

Throws:

SQLException

supportsSubqueriesInQuantifieds
```
public boolean supportsSubqueriesInQuantifieds()
                                        throws SQLException
```
Specified by:

supportsSubqueriesInQuantifieds in interface DatabaseMetaData

Throws:

SQLException

supportsTableCorrelationNames
```
public boolean supportsTableCorrelationNames()
                                      throws SQLException
```
Specified by:

supportsTableCorrelationNames in interface DatabaseMetaData

Throws:

SQLException

supportsTransactionIsolationLevel
```
public boolean supportsTransactionIsolationLevel(int level)
                                          throws SQLException
```
Specified by:

supportsTransactionIsolationLevel in interface DatabaseMetaData

Throws:

SQLException

supportsTransactions
```
public boolean supportsTransactions()
                             throws SQLException
```
Specified by:

supportsTransactions in interface DatabaseMetaData

Throws:

SQLException

supportsUnion
```
public boolean supportsUnion()
                      throws SQLException
```
Specified by:

supportsUnion in interface DatabaseMetaData

Throws:

SQLException

supportsUnionAll
```
public boolean supportsUnionAll()
                         throws SQLException
```
Specified by:

supportsUnionAll in interface DatabaseMetaData

Throws:

SQLException

updatesAreDetected
```
public boolean updatesAreDetected(int type)
                           throws SQLException
```
Specified by:

updatesAreDetected in interface DatabaseMetaData

Throws:

SQLException

usesLocalFilePerTable
```
public boolean usesLocalFilePerTable()
                              throws SQLException
```
Specified by:

usesLocalFilePerTable in interface DatabaseMetaData

Throws:

SQLException

usesLocalFiles
```
public boolean usesLocalFiles()
                       throws SQLException
```
Specified by:

usesLocalFiles in interface DatabaseMetaData

Throws:

SQLException

toString
```
@Deprecated
public String toString()
```
Deprecated. recommend using getMetadataInJson() instead of toString()

Overrides:

toString in class Object

getMetadataInJson

public String getMetadataInJson()
                         throws SQLException

Throws:: SQLException

Class IoTDBDatabaseMetadata

Field Summary

Fields inherited from interface java.sql.DatabaseMetaData

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface java.sql.DatabaseMetaData

Method Detail

getColumns

isWrapperFor

unwrap

allProceduresAreCallable

allTablesAreSelectable

autoCommitFailureClosesAllResultSets

dataDefinitionCausesTransactionCommit

dataDefinitionIgnoredInTransactions

deletesAreDetected

doesMaxRowSizeIncludeBlobs

generatedKeyAlwaysReturned

getAttributes

getBestRowIdentifier

getCatalogSeparator

getCatalogTerm

getCatalogs

getClientInfoProperties

getColumnPrivileges

getConnection

getCrossReference

getDatabaseMajorVersion

getDatabaseMinorVersion

getDatabaseProductName

getDatabaseProductVersion

getDefaultTransactionIsolation

getDriverMajorVersion

getDriverMinorVersion

getDriverName

getDriverVersion

getExportedKeys

getExtraNameCharacters

getFunctionColumns

getFunctions

getIdentifierQuoteString

getImportedKeys

getIndexInfo

getJDBCMajorVersion

getJDBCMinorVersion

getMaxBinaryLiteralLength

getMaxCatalogNameLength

getMaxCharLiteralLength

getMaxColumnNameLength

getMaxColumnsInGroupBy

getMaxColumnsInIndex

getMaxColumnsInOrderBy

getMaxColumnsInSelect

getMaxColumnsInTable

getMaxConnections

getMaxCursorNameLength

getMaxIndexLength

getMaxProcedureNameLength

getMaxRowSize

getMaxSchemaNameLength

getMaxStatementLength

getMaxStatements

getMaxTableNameLength

getMaxTablesInSelect

getMaxUserNameLength

getNumericFunctions

getPrimaryKeys

getProcedureColumns

getProcedureTerm

getProcedures

getPseudoColumns

getResultSetHoldability

getRowIdLifetime

getSQLKeywords

getSQLStateType

getSchemaTerm

getSchemas

getSchemas

getSearchStringEscape

getStringFunctions