Package org.apache.cayenne.dba.postgres
Class PostgresQualifierTranslator
- java.lang.Object
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- org.apache.cayenne.access.translator.select.QueryAssemblerHelper
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- org.apache.cayenne.access.translator.select.QualifierTranslator
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- org.apache.cayenne.access.translator.select.TrimmingQualifierTranslator
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- org.apache.cayenne.dba.postgres.PostgresQualifierTranslator
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- 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
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Fields inherited from class org.apache.cayenne.access.translator.select.TrimmingQualifierTranslator
trimFunction
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Fields inherited from class org.apache.cayenne.access.translator.select.QualifierTranslator
caseInsensitive, matchingObject, objectMatchTranslator, qualifier, useAliasForExpressions, waitingForEndNode
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Fields inherited from class org.apache.cayenne.access.translator.select.QueryAssemblerHelper
out, queryAssembler, strategy
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Constructor Summary
Constructors Constructor Description PostgresQualifierTranslator(QueryAssembler queryAssembler)
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Method Summary
All Methods Instance Methods Concrete Methods 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, setTrimFunction
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Methods 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, setUseAliasForExpressions
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Methods 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 Detail
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PostgresQualifierTranslator
public PostgresQualifierTranslator(QueryAssembler queryAssembler)
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Method Detail
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startNode
public void startNode(Expression node, Expression parentNode)
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
public void endNode(Expression node, Expression parentNode)
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
public void finishedChild(Expression node, int childIndex, boolean hasMoreChildren)
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
protected void appendFunction(ASTFunctionCall functionExpression)
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
protected void appendFunctionArgDivider(ASTFunctionCall functionExpression)
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
protected void clearLastFunctionArgDivider(ASTFunctionCall functionExpression)
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
protected boolean parenthesisNeeded(Expression node, Expression parentNode)
- Overrides:
parenthesisNeededin classQualifierTranslator
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appendExtractFunction
protected void appendExtractFunction(ASTExtract functionExpression)
Description copied from class:QualifierTranslatorSpecial case for extract date/time parts functions as they have many variants- Overrides:
appendExtractFunctionin classQualifierTranslator
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