exposed-jdbc/src/main/kotlin/org/jetbrains/exposed/v1/jdbc/statements/jdbc/JdbcDatabaseMetadataImpl.kt [486:509]:
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        allTables: Map<String, Table>,
        isMysqlDialect: Boolean
    ): Pair<String, ForeignKeyConstraint>? {
        val fromTableName = getString("FKTABLE_NAME")!!
        if (isMysqlDialect && fromTableName !in allTables.keys) return null
        val fromColumnName = identifierManager.quoteIdentifierWhenWrongCaseOrNecessary(
            getString("FKCOLUMN_NAME")!!
        )
        val fromColumn = allTables[fromTableName]?.columns?.firstOrNull {
            val identifier = if (isMysqlDialect) it.nameInDatabaseCase() else it.name
            identifierManager.quoteIdentifierWhenWrongCaseOrNecessary(identifier) == fromColumnName
        } ?: return null // Do not crash if there are missing fields in Exposed's tables
        val constraintName = getString("FK_NAME")!!
        val targetTableName = getString("PKTABLE_NAME")!!
        val targetColumnName = identifierManager.quoteIdentifierWhenWrongCaseOrNecessary(
            if (isMysqlDialect) {
                getString("PKCOLUMN_NAME")!!
            } else {
                identifierManager.inProperCase(getString("PKCOLUMN_NAME")!!)
            }
        )
        val targetColumn = allTables[targetTableName]?.columns?.firstOrNull {
            identifierManager.quoteIdentifierWhenWrongCaseOrNecessary(it.nameInDatabaseCase()) == targetColumnName
        } ?: return null // Do not crash if there are missing fields in Exposed's tables
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exposed-r2dbc/src/main/kotlin/org/jetbrains/exposed/v1/r2dbc/statements/api/R2dbcDatabaseMetadataImpl.kt [353:376]:
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        allTables: Map<String, Table>,
        isMysqlDialect: Boolean
    ): Pair<String, ForeignKeyConstraint>? {
        val fromTableName = getString("FKTABLE_NAME")!!
        if (isMysqlDialect && fromTableName !in allTables.keys) return null
        val fromColumnName = identifierManager.quoteIdentifierWhenWrongCaseOrNecessary(
            getString("FKCOLUMN_NAME")!!
        )
        val fromColumn = allTables[fromTableName]?.columns?.firstOrNull {
            val identifier = if (isMysqlDialect) it.nameInDatabaseCase() else it.name
            identifierManager.quoteIdentifierWhenWrongCaseOrNecessary(identifier) == fromColumnName
        } ?: return null // Do not crash if there are missing fields in Exposed's tables
        val constraintName = getString("FK_NAME")!!
        val targetTableName = getString("PKTABLE_NAME")!!
        val targetColumnName = identifierManager.quoteIdentifierWhenWrongCaseOrNecessary(
            if (isMysqlDialect) {
                getString("PKCOLUMN_NAME")!!
            } else {
                identifierManager.inProperCase(getString("PKCOLUMN_NAME")!!)
            }
        )
        val targetColumn = allTables[targetTableName]?.columns?.firstOrNull {
            identifierManager.quoteIdentifierWhenWrongCaseOrNecessary(it.nameInDatabaseCase()) == targetColumnName
        } ?: return null // Do not crash if there are missing fields in Exposed's tables
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