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
trimFunction
Fields inherited from class org.apache.cayenne.access.translator.select.QualifierTranslator
caseInsensitive, matchingObject, objectMatchTranslator, qualifier, useAliasForExpressions, waitingForEndNode
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
Modifier and Type Method Description protected void
appendExtractFunction(ASTExtract functionExpression)
Special case for extract date/time parts functions as they have many variantsprotected void
appendFunction(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 void
appendFunctionArgDivider(ASTFunctionCall functionExpression)
Append divider between function arguments.protected void
clearLastFunctionArgDivider(ASTFunctionCall functionExpression)
Clear last divider as we currently don't now position of argument until parent element is ended.void
endNode(Expression node, Expression parentNode)
Called during the traversal after an expression node children processing is finished.void
finishedChild(Expression node, int childIndex, boolean hasMoreChildren)
Called during traversal after a child of expression has been visited.protected boolean
parenthesisNeeded(Expression node, Expression parentNode)
void
startNode(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
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
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 Details
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PostgresQualifierTranslator
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Method Details
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startNode
Description copied from interface:TraversalHandler
Called during the traversal before an expression node children processing is started.- Specified by:
startNode
in interfaceTraversalHandler
- Overrides:
startNode
in classQualifierTranslator
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endNode
Description copied from interface:TraversalHandler
Called during the traversal after an expression node children processing is finished.- Specified by:
endNode
in interfaceTraversalHandler
- Overrides:
endNode
in classQualifierTranslator
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finishedChild
Description copied from interface:TraversalHandler
Called during traversal after a child of expression has been visited.- Specified by:
finishedChild
in interfaceTraversalHandler
- Overrides:
finishedChild
in classQualifierTranslator
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appendFunction
Description copied from class:QualifierTranslator
Append function name to result SQL Override this method to rename or skip function if generic name isn't supported on target DB.- Overrides:
appendFunction
in classQualifierTranslator
- Since:
- 4.0
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appendFunctionArgDivider
Description copied from class:QualifierTranslator
Append divider between function arguments. In overriding methods can be replaced e.g. for " || " for CONCAT operation- Overrides:
appendFunctionArgDivider
in classQualifierTranslator
- Since:
- 4.0
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clearLastFunctionArgDivider
Description copied from class:QualifierTranslator
Clear last divider as we currently don't now position of argument until parent element is ended.- Overrides:
clearLastFunctionArgDivider
in classQualifierTranslator
- Since:
- 4.0
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parenthesisNeeded
- Overrides:
parenthesisNeeded
in classQualifierTranslator
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appendExtractFunction
Description copied from class:QualifierTranslator
Special case for extract date/time parts functions as they have many variants- Overrides:
appendExtractFunction
in classQualifierTranslator
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