41 lines
941 B
Go
41 lines
941 B
Go
package table_analyzers
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import (
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"context"
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"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/config"
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"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/etl"
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"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/models"
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"github.com/google/uuid"
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)
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func PartitionRangeGenerator(
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ctx context.Context,
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tableAnalyzer etl.TableAnalyzer,
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tableInfo config.TableInfo,
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partitionColumn string,
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rowsPerPartition int64,
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) ([]models.Partition, error) {
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rowsCount, err := tableAnalyzer.EstimateTotalRows(ctx, tableInfo)
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if err != nil {
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return nil, err
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}
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if rowsCount <= rowsPerPartition {
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return []models.Partition{{
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Id: uuid.New(),
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HasRange: false,
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RetryCounter: 0,
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}}, nil
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}
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partitionsCount := rowsCount / rowsPerPartition
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partitions, err := tableAnalyzer.CalculatePartitionRanges(ctx, tableInfo, partitionColumn, partitionsCount)
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if err != nil {
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return nil, err
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}
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return partitions, nil
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}
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