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#378 Add support for MySQL databases in the JDBC source.
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95 changes: 95 additions & 0 deletions
95
pramen/core/src/main/scala/za/co/absa/pramen/core/sql/SqlGeneratorMySQL.scala
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| /* | ||
| * Copyright 2022 ABSA Group Limited | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| package za.co.absa.pramen.core.sql | ||
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| import za.co.absa.pramen.api.sql.{SqlColumnType, SqlConfig, SqlGeneratorBase} | ||
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| import java.time.LocalDate | ||
| import java.time.format.DateTimeFormatter | ||
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| class SqlGeneratorMySQL(sqlConfig: SqlConfig) extends SqlGeneratorBase(sqlConfig) { | ||
| private val dateFormatterApp = DateTimeFormatter.ofPattern(sqlConfig.dateFormatApp) | ||
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| override val beginEndEscapeChars: (Char, Char) = ('`', '`') | ||
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| override def getDtable(sql: String): String = { | ||
| if (sql.exists(_ == ' ')) { | ||
| s"($sql) t" | ||
| } else { | ||
| sql | ||
| } | ||
| } | ||
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| override def getCountQuery(tableName: String): String = { | ||
| s"SELECT COUNT(*) FROM ${escape(tableName)}" | ||
| } | ||
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| override def getCountQuery(tableName: String, infoDateBegin: LocalDate, infoDateEnd: LocalDate): String = { | ||
| val where = getWhere(infoDateBegin, infoDateEnd) | ||
| s"SELECT COUNT(*) FROM ${escape(tableName)} WHERE $where" | ||
| } | ||
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| override def getDataQuery(tableName: String, columns: Seq[String], limit: Option[Int]): String = { | ||
| s"SELECT ${columnExpr(columns)} FROM ${escape(tableName)}${getLimit(limit)}" | ||
| } | ||
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| override def getDataQuery(tableName: String, infoDateBegin: LocalDate, infoDateEnd: LocalDate, columns: Seq[String], limit: Option[Int]): String = { | ||
| val where = getWhere(infoDateBegin, infoDateEnd) | ||
| s"SELECT ${columnExpr(columns)} FROM ${escape(tableName)} WHERE $where${getLimit(limit)}" | ||
| } | ||
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| override def getWhere(dateBegin: LocalDate, dateEnd: LocalDate): String = { | ||
| val dateBeginLit = getDateLiteral(dateBegin) | ||
| val dateEndLit = getDateLiteral(dateEnd) | ||
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| val dateTypes: Array[SqlColumnType] = Array(SqlColumnType.DATETIME) | ||
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| val infoDateColumnAdjusted = | ||
| if (dateTypes.contains(sqlConfig.infoDateType)) { | ||
| s"DATE($infoDateColumn)" | ||
| } else { | ||
| infoDateColumn | ||
| } | ||
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| if (dateBeginLit == dateEndLit) { | ||
| s"$infoDateColumnAdjusted = $dateBeginLit" | ||
| } else { | ||
| s"$infoDateColumnAdjusted >= $dateBeginLit AND $infoDateColumnAdjusted <= $dateEndLit" | ||
| } | ||
| } | ||
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| override def getDateLiteral(date: LocalDate): String = { | ||
| sqlConfig.infoDateType match { | ||
| case SqlColumnType.DATE => | ||
| val dateStr = DateTimeFormatter.ISO_LOCAL_DATE.format(date) | ||
| s"'$dateStr'" | ||
| case SqlColumnType.DATETIME => | ||
| val dateStr = DateTimeFormatter.ISO_LOCAL_DATE.format(date) | ||
| s"'$dateStr'" | ||
| case SqlColumnType.STRING => | ||
| val dateStr = dateFormatterApp.format(date) | ||
| s"'$dateStr'" | ||
| case SqlColumnType.NUMBER => | ||
| val dateStr = dateFormatterApp.format(date) | ||
| s"$dateStr" | ||
| } | ||
| } | ||
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| private def getLimit(limit: Option[Int]): String = { | ||
| limit.map(n => s" LIMIT $n").getOrElse("") | ||
| } | ||
| } |
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