2019-05-19 05:27:00 +00:00
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#include <DataStreams/CheckConstraintsBlockOutputStream.h>
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2019-06-05 07:33:34 +00:00
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#include <Parsers/formatAST.h>
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2019-05-19 05:27:00 +00:00
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namespace DB
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{
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void CheckConstraintsBlockOutputStream::write(const Block & block)
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{
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2019-06-05 07:33:34 +00:00
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for (size_t i = 0; i < expressions.size(); ++i)
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{
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auto constraint_expr = expressions[i];
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2019-05-19 05:27:00 +00:00
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if (!checkConstraintOnBlock(block, constraint_expr))
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2019-06-05 07:33:34 +00:00
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throw Exception{"Constraint " + constraints.constraints[i]->name + " is not satisfied at, constraint expression: " +
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serializeAST(*(constraints.constraints[i]->expr), true), ErrorCodes::LOGICAL_ERROR};
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}
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2019-05-19 05:27:00 +00:00
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output->write(block);
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}
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void CheckConstraintsBlockOutputStream::flush()
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{
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output->flush();
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}
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void CheckConstraintsBlockOutputStream::writePrefix()
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{
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output->writePrefix();
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}
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void CheckConstraintsBlockOutputStream::writeSuffix()
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{
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output->writeSuffix();
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}
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bool CheckConstraintsBlockOutputStream::checkConstraintOnBlock(const Block & block, const ExpressionActionsPtr & constraint)
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{
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Block res = block;
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constraint->execute(res);
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assert(block.columns() == res.columns() - 1);
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ColumnWithTypeAndName res_column = res.safeGetByPosition(res.columns() - 1);
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size_t column_size = res_column.column->size();
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for (size_t i = 0; i < column_size; ++i)
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if (!res_column.column->getBool(i))
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return false;
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return true;
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}
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}
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