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42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
#pragma once
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#include <DB/DataTypes/IDataType.h>
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namespace DB
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{
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namespace Conditional
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{
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/// Determine the return type of the function multiIf when all the
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/// branches (then, else) have numeric types.
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DataTypePtr getReturnTypeForArithmeticArgs(const DataTypes & args);
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/// Returns true if either all the branches are null or
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/// all the non-null branches (then, else) have numeric types.
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bool hasArithmeticBranches(const DataTypes & args);
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/// Returns true if either all the branches are null or
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/// all the non-null branches (then, else) are arrays.
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bool hasArrayBranches(const DataTypes & args);
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/// Returns true if either all the branches are null or
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/// all the non-null branches (then, else) have the same type name.
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bool hasIdenticalTypes(const DataTypes & args);
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/// Returns true if either all the branches are null or
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/// all the non-null branches (then, else) are fixed strings.
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bool hasFixedStrings(const DataTypes & args);
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/// Returns true if either all the branches are null or
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/// all the non-null branches (then, else) are fixed strings of equal length.
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bool hasFixedStringsOfIdenticalLength(const DataTypes & args);
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/// Returns true if either all the branches are null or
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/// all the non-null branches (then, else) are strings.
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bool hasStrings(const DataTypes & args);
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}
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}
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