81 lines
1.4 KiB
C++
Executable File
81 lines
1.4 KiB
C++
Executable File
#ifndef __SQLPARSER__TABLEREF_H__
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#define __SQLPARSER__TABLEREF_H__
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#include "Expr.h"
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#include <stdio.h>
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#include <vector>
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namespace hsql {
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struct SelectStatement;
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struct JoinDefinition;
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struct TableRef;
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// Possible table reference types.
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enum TableRefType {
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kTableName,
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kTableSelect,
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kTableJoin,
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kTableCrossProduct
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};
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struct TableName {
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char* schema;
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char* name;
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};
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struct Alias {
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Alias(char* name, std::vector<char*>* columns = nullptr);
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~Alias();
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char* name;
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std::vector<char*>* columns;
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};
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// Holds reference to tables. Can be either table names or a select statement.
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struct TableRef {
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TableRef(TableRefType type);
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virtual ~TableRef();
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TableRefType type;
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char* schema;
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char* name;
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Alias* alias;
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SelectStatement* select;
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std::vector<TableRef*>* list;
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JoinDefinition* join;
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// Returns true if a schema is set.
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bool hasSchema() const;
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// Returns the alias, if it is set. Otherwise the name.
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const char* getName() const;
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};
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// Possible types of joins.
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enum JoinType {
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kJoinInner,
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kJoinFull,
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kJoinLeft,
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kJoinRight,
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kJoinCross,
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kJoinNatural
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};
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// Definition of a join construct.
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struct JoinDefinition {
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JoinDefinition();
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virtual ~JoinDefinition();
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TableRef* left;
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TableRef* right;
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Expr* condition;
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JoinType type;
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};
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} // namespace hsql
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#endif
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