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109 changes: 109 additions & 0 deletions
109
...irbyte/integrations/destination/redshift/typing_deduping/RedshiftGenerationIdMigration.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| /* | ||
| * Copyright (c) 2024 Airbyte, Inc., all rights reserved. | ||
| */ | ||
|
|
||
| package io.airbyte.integrations.destination.redshift.typing_deduping | ||
|
|
||
| import com.fasterxml.jackson.databind.JsonNode | ||
| import io.airbyte.cdk.db.jdbc.JdbcDatabase | ||
| import io.airbyte.cdk.integrations.base.JavaBaseConstants | ||
| import io.airbyte.integrations.base.destination.typing_deduping.DestinationHandler | ||
| import io.airbyte.integrations.base.destination.typing_deduping.DestinationInitialStatus | ||
| import io.airbyte.integrations.base.destination.typing_deduping.StreamConfig | ||
| import io.airbyte.integrations.base.destination.typing_deduping.migrators.Migration | ||
| import io.github.oshai.kotlinlogging.KotlinLogging | ||
|
|
||
| private val logger = KotlinLogging.logger {} | ||
|
|
||
| class RedshiftGenerationIdMigration( | ||
| private val database: JdbcDatabase, | ||
| private val databaseName: String, | ||
| ) : Migration<RedshiftState> { | ||
| override fun migrateIfNecessary( | ||
| destinationHandler: DestinationHandler<RedshiftState>, | ||
| stream: StreamConfig, | ||
| state: DestinationInitialStatus<RedshiftState> | ||
| ): Migration.MigrationResult<RedshiftState> { | ||
| if (state.destinationState.isGenerationIdPresent) { | ||
| logger.info { | ||
| "Skipping generation_id migration for ${stream.id.originalNamespace}.${stream.id.originalName} because our state says it's already done" | ||
| } | ||
| return Migration.MigrationResult(state.destinationState, invalidateInitialState = false) | ||
| } | ||
|
|
||
| if (!state.initialRawTableStatus.rawTableExists) { | ||
| // The raw table doesn't exist. No migration necessary. Update the state. | ||
| logger.info { | ||
| "Skipping generation_id migration for ${stream.id.originalNamespace}.${stream.id.originalName} because the raw table doesn't exist" | ||
| } | ||
| return Migration.MigrationResult( | ||
| state.destinationState.copy(isGenerationIdPresent = true), | ||
| invalidateInitialState = false | ||
| ) | ||
| } | ||
|
|
||
| // Add generation_id to the raw table if necessary | ||
| val rawTableDefinitionQueryResult: List<JsonNode> = | ||
| database.queryJsons( | ||
| """ | ||
| SHOW COLUMNS | ||
| FROM TABLE "$databaseName"."${stream.id.rawNamespace}"."${stream.id.rawName}" | ||
| LIKE '${JavaBaseConstants.COLUMN_NAME_AB_GENERATION_ID}' | ||
| """.trimIndent() | ||
| ) | ||
| if (rawTableDefinitionQueryResult.isNotEmpty()) { | ||
| logger.info { | ||
| "${stream.id.originalNamespace}.${stream.id.originalName}: Skipping generation_id migration for raw table because it already has the generation_id column" | ||
| } | ||
| } else { | ||
| logger.info { | ||
| "Migrating generation_id for table ${stream.id.rawNamespace}.${stream.id.rawName}" | ||
| } | ||
| // Quote for raw table columns | ||
| val alterRawTableSql = | ||
| """ | ||
| ALTER TABLE "${stream.id.rawNamespace}"."${stream.id.rawName}" | ||
| ADD COLUMN "${JavaBaseConstants.COLUMN_NAME_AB_GENERATION_ID}" BIGINT; | ||
| """.trimIndent() | ||
| database.execute(alterRawTableSql) | ||
| } | ||
|
|
||
| // Add generation_id to the final table if necessary | ||
| // As a slight optimization, only do this if we previously detected that the final table | ||
| // schema is wrong | ||
| if (state.isFinalTablePresent && state.isSchemaMismatch) { | ||
| val finalTableColumnQueryResult: List<JsonNode> = | ||
| database.queryJsons( | ||
| """ | ||
| SHOW COLUMNS | ||
| FROM TABLE "$databaseName"."${stream.id.finalNamespace}"."${stream.id.finalName}" | ||
| LIKE '${JavaBaseConstants.COLUMN_NAME_AB_GENERATION_ID}' | ||
| """.trimIndent() | ||
| ) | ||
| if (finalTableColumnQueryResult.isNotEmpty()) { | ||
| logger.info { | ||
| "${stream.id.originalNamespace}.${stream.id.originalName}: Skipping generation_id migration for final table because it already has the generation_id column" | ||
| } | ||
| } else { | ||
| logger.info { | ||
| "Migrating generation_id for table ${stream.id.finalNamespace}.${stream.id.finalName}" | ||
| } | ||
| database.execute( | ||
| """ | ||
| ALTER TABLE "${stream.id.finalNamespace}"."${stream.id.finalName}" | ||
| ADD COLUMN "${JavaBaseConstants.COLUMN_NAME_AB_GENERATION_ID}" BIGINT NULL; | ||
| """.trimIndent() | ||
| ) | ||
| } | ||
| } else { | ||
| logger.info { | ||
| "${stream.id.originalNamespace}.${stream.id.originalName}: Skipping generation_id migration for final table. Final table exists: ${state.isFinalTablePresent}; final table schema is incorrect: ${state.isSchemaMismatch}" | ||
| } | ||
| } | ||
|
|
||
| return Migration.MigrationResult( | ||
| state.destinationState.copy(isGenerationIdPresent = true), | ||
| invalidateInitialState = true | ||
| ) | ||
| } | ||
| } |
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