Package org.apache.cayenne.dba.derby
Class DerbyQualifierTranslator
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.derby.DerbyQualifierTranslator
- All Implemented Interfaces:
TraversalHandler
public class DerbyQualifierTranslator extends TrimmingQualifierTranslator
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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 DerbyQualifierTranslator(QueryAssembler queryAssembler, String trimFunction)
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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
appendFunctionArg(Object value, ASTFunctionCall functionExpression)
A little bit ugly code that wraps String scalars to CAST(? AS VARCHAR(length)) because otherwise derby don't know what type will be at the placeholder and use LONG VARCHAR that isn't comparable what leads to statement preparation failure.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.protected void
processColumnWithQuoteSqlIdentifiers(DbAttribute dbAttr, Expression pathExp)
Adds special handling of CHAR columns.Methods inherited from class org.apache.cayenne.access.translator.select.TrimmingQualifierTranslator
getTrimFunction, processColumn, setTrimFunction
Methods inherited from class org.apache.cayenne.access.translator.select.QualifierTranslator
appendLiteral, appendObjectMatch, detectObjectMatch, doAppendPart, doAppendPart, endNode, extractQualifier, finishedChild, objectNode, operandForBitwiseAnd, operandForBitwiseLeftShift, operandForBitwiseNot, operandForBitwiseOr, operandForBitwiseRightShift, operandForBitwiseXor, parenthesisNeeded, processRelTermination, setCaseInsensitive, setQualifier, setUseAliasForExpressions, startNode
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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DerbyQualifierTranslator
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Method Details
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processColumnWithQuoteSqlIdentifiers
Description copied from class:TrimmingQualifierTranslator
Adds special handling of CHAR columns.- Overrides:
processColumnWithQuoteSqlIdentifiers
in classTrimmingQualifierTranslator
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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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appendFunctionArg
protected void appendFunctionArg(Object value, ASTFunctionCall functionExpression) throws IOExceptionA little bit ugly code that wraps String scalars to CAST(? AS VARCHAR(length)) because otherwise derby don't know what type will be at the placeholder and use LONG VARCHAR that isn't comparable what leads to statement preparation failure.- Overrides:
appendFunctionArg
in classQualifierTranslator
- Throws:
IOException
- 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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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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