Class SchemaVisitor
java.lang.Object
org.antlr.v4.runtime.tree.AbstractParseTreeVisitor<T>
org.apache.drill.exec.record.metadata.schema.parser.SchemaParserBaseVisitor<TupleMetadata>
org.apache.drill.exec.record.metadata.schema.parser.SchemaVisitor
- All Implemented Interfaces:
org.antlr.v4.runtime.tree.ParseTreeVisitor<TupleMetadata>
,SchemaParserVisitor<TupleMetadata>
Visits schema and stores metadata about its columns into
TupleMetadata
class.-
Nested Class Summary
Modifier and TypeClassDescriptionstatic class
Visits column definition, adds column properties toColumnMetadata
if present.static class
Visits various types of columns (primitive, struct, map, array) and stores their metadata intoColumnMetadata
class.static class
Visits schema or column properties. -
Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptionVisit a parse tree produced bySchemaParser.columns()
.Visit a parse tree produced bySchemaParser.schema()
.Methods inherited from class org.apache.drill.exec.record.metadata.schema.parser.SchemaParserBaseVisitor
visitArray_map_type_def, visitArray_simple_type_def, visitArray_struct_type_def, visitArray_type, visitArray_union_type_def, visitBigint, visitBinary, visitBoolean, visitColumn, visitColumn_def, visitComplex_array_column, visitComplex_array_type, visitDate, visitDecimal, visitDefault_value, visitDouble, visitDynamic, visitFloat, visitFormat_value, visitId, visitInt, visitInterval, visitInterval_day, visitInterval_year, visitMap_column, visitMap_key_simple_type_def, visitMap_key_type_def, visitMap_type, visitMap_value_array_type_def, visitMap_value_map_type_def, visitMap_value_simple_type_def, visitMap_value_struct_type_def, visitMap_value_type_def, visitMap_value_union_type_def, visitNullability, visitPrimitive_column, visitProperty_pair, visitProperty_values, visitQuoted_id, visitSimple_array_column, visitSimple_array_type, visitSmallint, visitString_value, visitStruct_column, visitStruct_type, visitTime, visitTimestamp, visitTinyint, visitUnion_column, visitUnion_type, visitUnit1, visitUnit2, visitUnit4, visitUnit8, visitVarchar
Methods inherited from class org.antlr.v4.runtime.tree.AbstractParseTreeVisitor
aggregateResult, defaultResult, shouldVisitNextChild, visit, visitChildren, visitErrorNode, visitTerminal
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface org.antlr.v4.runtime.tree.ParseTreeVisitor
visit, visitChildren, visitErrorNode, visitTerminal
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Constructor Details
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SchemaVisitor
public SchemaVisitor()
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Method Details
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visitSchema
Description copied from class:SchemaParserBaseVisitor
Visit a parse tree produced bySchemaParser.schema()
.The default implementation returns the result of calling
AbstractParseTreeVisitor.visitChildren(org.antlr.v4.runtime.tree.RuleNode)
onctx
.- Specified by:
visitSchema
in interfaceSchemaParserVisitor<TupleMetadata>
- Overrides:
visitSchema
in classSchemaParserBaseVisitor<TupleMetadata>
- Parameters:
ctx
- the parse tree- Returns:
- the visitor result
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visitColumns
Description copied from class:SchemaParserBaseVisitor
Visit a parse tree produced bySchemaParser.columns()
.The default implementation returns the result of calling
AbstractParseTreeVisitor.visitChildren(org.antlr.v4.runtime.tree.RuleNode)
onctx
.- Specified by:
visitColumns
in interfaceSchemaParserVisitor<TupleMetadata>
- Overrides:
visitColumns
in classSchemaParserBaseVisitor<TupleMetadata>
- Parameters:
ctx
- the parse tree- Returns:
- the visitor result
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