Top Description Fields Constructors Methods
org.hsqldb

public Class ExpressionAccessor

extends Expression
Class Inheritance
Imports
org.hsqldb.error.Error, .ErrorCode, org.hsqldb.lib.List, org.hsqldb.types.Type
database object component access
Author
Fred Toussi (fredt@users dot sourceforge.net)
Since
2.0.0
Version
2.7.3

Field Summary

Inherited from org.hsqldb.Expression:
aliasBINARYcollationcolumnIndexdataTypeemptyArrayEXPR_FALSEEXPR_TRUEexprSubTypegroupingTypeisColumnConditionisColumnEqualisCorrelatedisDistinctAggregateisSingleColumnConditionisSingleColumnEqualisSingleColumnNotNullisSingleColumnNullLEFTnodeDataTypesnodesnoOptimisationnullabilityopTypeparameterIndexrangeGrouprangeGroupsresultTableColumnIndexRIGHTtableTERNARYTHIRDUNARYvalueData

Constructor Summary

AccessConstructor and Description
pack-priv
ExpressionAccessor(Expression left, Expression right)

Method Summary

Modifier and TypeMethod and Description
protected String
describe(Session session, int blanks)

Overrides org.hsqldb.Expression.describe.

public ColumnSchema
getColumn()

Overrides org.hsqldb.Expression.getColumn.

public String
getSQL()

Overrides org.hsqldb.Expression.getSQL.

For use with CHECK constraints.

public Object[]
getUpdatedArray(Session session, Object[] array, Object value, boolean copy)

Assignment result

public Object
getValue(Session session)

Overrides org.hsqldb.Expression.getValue.

public List<Expression>
resolveColumnReferences(Session session, RangeGroup rangeGroup, int rangeCount, RangeGroup[] rangeGroups, List<Expression> unresolvedSet, boolean acceptsSequences)

Overrides org.hsqldb.Expression.resolveColumnReferences.

public void
resolveTypes(Session session, Expression parent)

Overrides org.hsqldb.Expression.resolveTypes.

Inherited from org.hsqldb.Expression:
checkValidCheckConstraintcollectAllExpressionscollectAllSubqueriescollectObjectNamescollectRangeVariablescollectRangeVariablesconvertToTypecostFactorcountNullsduplicateequalsequalsequalsequalsgetAggregatedValuegetAliasgetCheckSelectgetColumnIndexgetColumnNamegetConditiongetConstantValueNoCheckgetContextSQLgetDataTypegetDegreegetIndexableExpressiongetJoinRangeVariablesgetLeftNodegetNodeDataTypegetNodeDataTypesgetNullabilitygetRangeVariablegetResultgetRightNodegetRowValuegetSimpleNamegetSubqueriesgetSubTypegetTablegetTypegetUnkeyedColumnsgetValuegetValueClassNamehasAggregatehasConditionhashCodehasNonDeterministicFunctionhasReferencehasReferenceinsertValuesIntoSubqueryTableisComposedOfisComposedOfisConditionRangeVariableisCorrelatedisDistinctAggregateisDynamicParamisFalseisIndexableisSelfAggregateisTrueisUnresolvedParammaterialiseprepareTablereplaceAliasInOrderByreplaceColumnReferencesreplaceExpressionsreplaceNodereplaceRangeVariablesresetColumnReferencesresolveCheckOrGenExpressionresolveColumnReferencesresolveColumnSetresolveColumnSetresolveGrantFiltersetAggregatesetAliassetAsConstantValuesetAsConstantValuesetAttributesAsColumnsetCollationsetConditionsetCorrelatedReferencessetDataTypesetLeftNodesetNoOptimisationsetRightNodesetSubTypeswapLeftAndRightNodestestConditionupdateAggregatingValueupdateAggregatingValue

Constructor Detail

ExpressionAccessorback to summary
pack-priv ExpressionAccessor(Expression left, Expression right)

Method Detail

describeback to summary
protected String describe(Session session, int blanks)

Overrides org.hsqldb.Expression.describe.

getColumnback to summary
public ColumnSchema getColumn()

Overrides org.hsqldb.Expression.getColumn.

getSQLback to summary
public String getSQL()

Overrides org.hsqldb.Expression.getSQL.

Doc from org.hsqldb.Expression.getSQL.

For use with CHECK constraints. Under development. Currently supports a subset of expressions and is suitable for CHECK search conditions that refer only to the inserted/updated row. For full DDL reporting of VIEW select queries and CHECK search conditions, future improvements here are dependent upon improvements to SELECT query parsing, so that it is performed in a number of passes. An early pass should result in the query turned into an Expression tree that contains the information in the original SQL without any alterations, and with tables and columns all resolved. This Expression can then be preserved for future use. Table and column names that are not user-defined aliases should be kept as the HsqlName structures so that table or column renaming is reflected in the precompiled query.

getUpdatedArrayback to summary
public Object[] getUpdatedArray(Session session, Object[] array, Object value, boolean copy)

Assignment result

getValueback to summary
public Object getValue(Session session)

Overrides org.hsqldb.Expression.getValue.

resolveColumnReferencesback to summary
public List<Expression> resolveColumnReferences(Session session, RangeGroup rangeGroup, int rangeCount, RangeGroup[] rangeGroups, List<Expression> unresolvedSet, boolean acceptsSequences)

Overrides org.hsqldb.Expression.resolveColumnReferences.

resolveTypesback to summary
public void resolveTypes(Session session, Expression parent)

Overrides org.hsqldb.Expression.resolveTypes.