Package org.apache.cayenne.dba.postgres
Class PostgresQualifierTranslator
java.lang.Object
org.apache.cayenne.access.translator.select.QueryAssemblerHelper
org.apache.cayenne.access.translator.select.QualifierTranslator
org.apache.cayenne.access.translator.select.TrimmingQualifierTranslator
org.apache.cayenne.dba.postgres.PostgresQualifierTranslator
- All Implemented Interfaces:
TraversalHandler
public class PostgresQualifierTranslator extends TrimmingQualifierTranslator
Uses Postgres extensions to optimize various translations.
- Since:
- 1.1
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Field Summary
Fields inherited from class org.apache.cayenne.access.translator.select.TrimmingQualifierTranslator
trimFunctionFields inherited from class org.apache.cayenne.access.translator.select.QualifierTranslator
caseInsensitive, matchingObject, objectMatchTranslator, qualifier, useAliasForExpressions, waitingForEndNodeFields inherited from class org.apache.cayenne.access.translator.select.QueryAssemblerHelper
out, queryAssembler, strategy -
Constructor Summary
Constructors Constructor Description PostgresQualifierTranslator(QueryAssembler queryAssembler) -
Method Summary
Modifier and Type Method Description protected voidappendExtractFunction(ASTExtract functionExpression)Special case for extract date/time parts functions as they have many variantsprotected voidappendFunction(ASTFunctionCall functionExpression)Append function name to result SQL Override this method to rename or skip function if generic name isn't supported on target DB.protected voidappendFunctionArgDivider(ASTFunctionCall functionExpression)Append divider between function arguments.protected voidclearLastFunctionArgDivider(ASTFunctionCall functionExpression)Clear last divider as we currently don't now position of argument until parent element is ended.voidendNode(Expression node, Expression parentNode)Called during the traversal after an expression node children processing is finished.voidfinishedChild(Expression node, int childIndex, boolean hasMoreChildren)Called during traversal after a child of expression has been visited.protected booleanparenthesisNeeded(Expression node, Expression parentNode)voidstartNode(Expression node, Expression parentNode)Called during the traversal before an expression node children processing is started.Methods inherited from class org.apache.cayenne.access.translator.select.TrimmingQualifierTranslator
getTrimFunction, processColumn, processColumnWithQuoteSqlIdentifiers, setTrimFunctionMethods inherited from class org.apache.cayenne.access.translator.select.QualifierTranslator
appendFunctionArg, appendLiteral, appendObjectMatch, detectObjectMatch, doAppendPart, doAppendPart, extractQualifier, objectNode, operandForBitwiseAnd, operandForBitwiseLeftShift, operandForBitwiseNot, operandForBitwiseOr, operandForBitwiseRightShift, operandForBitwiseXor, processRelTermination, setCaseInsensitive, setQualifier, setUseAliasForExpressionsMethods inherited from class org.apache.cayenne.access.translator.select.QueryAssemblerHelper
appendDbPath, appendLikeEscapeCharacter, appendLiteralDirect, appendObjPath, appendPart, getDbEntity, getObjEntity, paramsDbType, processRelTermination, setForceJoinForRelations
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Constructor Details
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PostgresQualifierTranslator
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Method Details
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startNode
Description copied from interface:TraversalHandlerCalled during the traversal before an expression node children processing is started.- Specified by:
startNodein interfaceTraversalHandler- Overrides:
startNodein classQualifierTranslator
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endNode
Description copied from interface:TraversalHandlerCalled during the traversal after an expression node children processing is finished.- Specified by:
endNodein interfaceTraversalHandler- Overrides:
endNodein classQualifierTranslator
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finishedChild
Description copied from interface:TraversalHandlerCalled during traversal after a child of expression has been visited.- Specified by:
finishedChildin interfaceTraversalHandler- Overrides:
finishedChildin classQualifierTranslator
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appendFunction
Description copied from class:QualifierTranslatorAppend function name to result SQL Override this method to rename or skip function if generic name isn't supported on target DB.- Overrides:
appendFunctionin classQualifierTranslator- Since:
- 4.0
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appendFunctionArgDivider
Description copied from class:QualifierTranslatorAppend divider between function arguments. In overriding methods can be replaced e.g. for " || " for CONCAT operation- Overrides:
appendFunctionArgDividerin classQualifierTranslator- Since:
- 4.0
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clearLastFunctionArgDivider
Description copied from class:QualifierTranslatorClear last divider as we currently don't now position of argument until parent element is ended.- Overrides:
clearLastFunctionArgDividerin classQualifierTranslator- Since:
- 4.0
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parenthesisNeeded
- Overrides:
parenthesisNeededin classQualifierTranslator
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appendExtractFunction
Description copied from class:QualifierTranslatorSpecial case for extract date/time parts functions as they have many variants- Overrides:
appendExtractFunctionin classQualifierTranslator
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