Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/11557#discussion_r57271935
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/parser/ng/ExpressionParserSuite.scala
---
@@ -0,0 +1,494 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.
+ */
+package org.apache.spark.sql.catalyst.parser.ng
+
+import java.sql.{Date, Timestamp}
+
+import org.apache.spark.sql.catalyst.TableIdentifier
+import org.apache.spark.sql.catalyst.analysis.{UnresolvedAttribute, _}
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.plans.PlanTest
+import org.apache.spark.sql.types._
+import org.apache.spark.unsafe.types.CalendarInterval
+
+/**
+ * Test basic expression parsing. If a type of expression is supported it
should be tested here.
+ *
+ * Please note that some of the expressions test don't have to be sound
expressions, only their
+ * structure needs to be valid. Unsound expressions should be caught by
the Analyzer or
+ * CheckAnalysis classes.
+ */
+class ExpressionParserSuite extends PlanTest {
+ import CatalystSqlParser._
+ import org.apache.spark.sql.catalyst.dsl.expressions._
+ import org.apache.spark.sql.catalyst.dsl.plans._
+
+ def assertEqual(sqlCommand: String, e: Expression): Unit = {
+ compareExpressions(parseExpression(sqlCommand), e)
+ }
+
+ def intercept(sqlCommand: String, messages: String*): Unit = {
+ val e = intercept[ParseException](parseExpression(sqlCommand))
+ messages.foreach { message =>
+ assert(e.message.contains(message))
+ }
+ }
+
+ test("star expressions") {
+ // Global Star
+ assertEqual("*", UnresolvedStar(None))
+
+ // Targeted Star
+ assertEqual("a.b.*", UnresolvedStar(Option(Seq("a", "b"))))
+ }
+
+ // NamedExpression (Alias/Multialias)
+ test("named expressions") {
+ // No Alias
+ val r0 = 'a
+ assertEqual("a", r0)
+
+ // Single Alias.
+ val r1 = 'a as "b"
+ assertEqual("a as b", r1)
+ assertEqual("a b", r1)
+
+ // Multi-Alias
+ assertEqual("a as (b, c)", MultiAlias('a, Seq("b", "c")))
+ assertEqual("a() (b, c)", MultiAlias('a.function(), Seq("b", "c")))
+
+ // Numeric literals without a space between the literal qualifier and
the alias, should not be
+ // interpreted as such. An unresolved reference should be returned
instead.
+ // TODO add the JIRA-ticket number.
+ assertEqual("1SL", Symbol("1SL"))
+
+ // Aliased star is allowed.
+ assertEqual("a.* b", UnresolvedStar(Option(Seq("a"))) as 'b)
+ }
+
+ test("binary logical expressions") {
+ // And
+ assertEqual("a and b", 'a && 'b)
+
+ // Or
+ assertEqual("a or b", 'a || 'b)
+
+ // Combination And/Or check precedence
+ assertEqual("a and b or c and d", ('a && 'b) || ('c && 'd))
+ assertEqual("a or b or c and d", 'a || 'b || ('c && 'd))
+
+ // Multiple AND/OR get converted into a balanced tree
+ assertEqual("a or b or c or d or e or f", (('a || 'b) || 'c) || (('d
|| 'e) || 'f))
+ assertEqual("a and b and c and d and e and f", (('a && 'b) && 'c) &&
(('d && 'e) && 'f))
+ }
+
+ test("long binary logical expressions") {
+ def testVeryBinaryExpression(op: String, clazz: Class[_]): Unit = {
+ val sql = (1 to 1000).map(x => s"$x == $x").mkString(op)
+ val e = parseExpression(sql)
+ assert(e.collect { case _: EqualTo => true }.size === 1000)
+ assert(e.collect { case x if clazz.isInstance(x) => true }.size ===
999)
+ }
+ testVeryBinaryExpression(" AND ", classOf[And])
+ testVeryBinaryExpression(" OR ", classOf[Or])
+ }
+
+ test("not expressions") {
+ assertEqual("not a", !'a)
+ assertEqual("!a", !'a)
+ assertEqual("not true > true", Not(GreaterThan(true, true)))
+ }
+
+ test("exists expression") {
+ intercept("exists (select 1 from b where b.x = a.x)", "EXISTS clauses
are not supported")
+ }
+
+ test("comparison expressions") {
+ assertEqual("a = b", 'a === 'b)
+ assertEqual("a == b", 'a === 'b)
+ assertEqual("a <=> b", 'a <=> 'b)
+ assertEqual("a <> b", 'a =!= 'b)
+ assertEqual("a != b", 'a =!= 'b)
+ assertEqual("a < b", 'a < 'b)
+ assertEqual("a <= b", 'a <= 'b)
+ assertEqual("a > b", 'a > 'b)
+ assertEqual("a >= b", 'a >= 'b)
+ }
+
+ test("between expressions") {
+ assertEqual("a between b and c", 'a >= 'b && 'a <= 'c)
+ assertEqual("a not between b and c", !('a >= 'b && 'a <= 'c))
+ }
+
+ test("in expressions") {
+ assertEqual("a in (b, c, d)", 'a in ('b, 'c, 'd))
+ assertEqual("a not in (b, c, d)", !('a in ('b, 'c, 'd)))
+ }
+
+ test("in sub-query") {
+ intercept("a in (select b from c)", "IN with a Sub-query is currently
not supported")
+ }
+
+ test("like expressions") {
+ assertEqual("a like 'pattern%'", 'a like "pattern%")
+ assertEqual("a not like 'pattern%'", !('a like "pattern%"))
+ assertEqual("a rlike 'pattern%'", 'a rlike "pattern%")
+ assertEqual("a not rlike 'pattern%'", !('a rlike "pattern%"))
+ assertEqual("a regexp 'pattern%'", 'a rlike "pattern%")
+ assertEqual("a not regexp 'pattern%'", !('a rlike "pattern%"))
+ }
+
+ test("is null expressions") {
+ assertEqual("a is null", 'a.isNull)
+ assertEqual("a is not null", 'a.isNotNull)
+ }
+
+ test("binary arithmetic expressions") {
+ // Simple operations
+ assertEqual("a * b", 'a * 'b)
+ assertEqual("a / b", 'a / 'b)
+ assertEqual("a DIV b", ('a / 'b).cast(LongType))
+ assertEqual("a % b", 'a % 'b)
+ assertEqual("a + b", 'a + 'b)
+ assertEqual("a - b", 'a - 'b)
+ assertEqual("a & b", 'a & 'b)
+ assertEqual("a ^ b", 'a ^ 'b)
+ assertEqual("a | b", 'a | 'b)
+
+ // Check precedences
+ assertEqual(
+ "a * t | b ^ c & d - e + f % g DIV h / i * k",
+ 'a * 't | ('b ^ ('c & ('d - 'e + (('f % 'g / 'h).cast(LongType) / 'i
* 'k)))))
+ }
+
+ test("unary arithmetic expressions") {
+ assertEqual("+a", 'a)
+ assertEqual("-a", -'a)
+ assertEqual("~a", ~'a)
+ assertEqual("-+~~a", -(~(~'a)))
+ }
+
+ test("cast expressions") {
+ // Note that DataType parsing is tested elsewhere.
+ assertEqual("cast(a as int)", 'a.cast(IntegerType))
+ assertEqual("cast(a as timestamp)", 'a.cast(TimestampType))
+ assertEqual("cast(a as array<int>)", 'a.cast(ArrayType(IntegerType)))
+ assertEqual("cast(cast(a as int) as long)",
'a.cast(IntegerType).cast(LongType))
+ }
+
+ test("function expressions") {
+ assertEqual("foo()", 'foo.function())
+ assertEqual("foo.bar()", Symbol("foo.bar").function())
+ assertEqual("foo(*)", 'foo.function(1))
+ assertEqual("foo(a, b)", 'foo.function('a, 'b))
+ assertEqual("foo(all a, b)", 'foo.function('a, 'b))
+ assertEqual("foo(distinct a, b)", 'foo.distinctFunction('a, 'b))
+ assertEqual("grouping(distinct a, b)", 'grouping.distinctFunction('a,
'b))
+ assertEqual("`select`(all a, b)", 'select.function('a, 'b))
+ }
+
+ test("window function expressions") {
+ val func = 'foo.function(1)
+ def windowed(
+ partitioning: Seq[Expression] = Seq.empty,
+ ordering: Seq[SortOrder] = Seq.empty,
+ frame: WindowFrame = UnspecifiedFrame): Expression = {
+ WindowExpression(func, WindowSpecDefinition(partitioning, ordering,
frame))
+ }
+
+ // Basic window testing.
+ assertEqual("foo(*) over w1", UnresolvedWindowExpression(func,
WindowSpecReference("w1")))
+ assertEqual("foo(*) over ()", windowed())
+ assertEqual("foo(*) over (partition by a, b)", windowed(Seq('a, 'b)))
+ assertEqual("foo(*) over (order by a desc, b asc)",
windowed(Seq.empty, Seq('a.desc, 'b.asc )))
+ assertEqual("foo(*) over (partition by a, b order by c)",
windowed(Seq('a, 'b), Seq('c.asc)))
+
+ // Test use of expressions in window functions.
+ assertEqual(
+ "sum(product + 1) over (partition by ((product) + (1)) order by 2)",
+ WindowExpression('sum.function('product + 1),
+ WindowSpecDefinition(Seq('product + 1), Seq(Literal(2).asc),
UnspecifiedFrame)))
+ assertEqual(
+ "sum(product + 1) over (partition by ((product / 2) + 1) order by
2)",
+ WindowExpression('sum.function('product + 1),
+ WindowSpecDefinition(Seq('product / 2 + 1), Seq(Literal(2).asc),
UnspecifiedFrame)))
+
+ // Range/Row
+ val frameTypes = Seq(("rows", RowFrame), ("range", RangeFrame))
+ val boundaries = Seq(
+ ("10 preceding", ValuePreceding(10), CurrentRow),
+ ("3 + 1 following", ValueFollowing(4), CurrentRow), // Will fail
during analysis
+ ("unbounded preceding", UnboundedPreceding, CurrentRow),
+ ("unbounded following", UnboundedFollowing, CurrentRow), // Will
fail during analysis
+ ("between unbounded preceding and current row", UnboundedPreceding,
CurrentRow),
+ ("between unbounded preceding and unbounded following",
+ UnboundedPreceding, UnboundedFollowing),
+ ("between 10 preceding and current row", ValuePreceding(10),
CurrentRow),
+ ("between current row and 5 following", CurrentRow,
ValueFollowing(5)),
+ ("between 10 preceding and 5 following", ValuePreceding(10),
ValueFollowing(5))
+ )
+ frameTypes.foreach {
+ case (frameTypeSql, frameType) =>
+ boundaries.foreach {
+ case (boundarySql, begin, end) =>
+ val query = s"foo(*) over (partition by a order by b
$frameTypeSql $boundarySql)"
+ val expr = windowed(Seq('a), Seq('b.asc),
SpecifiedWindowFrame(frameType, begin, end))
+ assertEqual(query, expr)
+ }
+ }
+
+ // We cannot use non integer constants.
+ intercept("foo(*) over (partition by a order by b rows 10.0
preceding)",
+ "Frame bound value must be a constant integer.")
+
+ // We cannot use an arbitrary expression.
+ intercept("foo(*) over (partition by a order by b rows exp(b)
preceding)",
+ "Frame bound value must be a constant integer.")
+
+ // We cannot have a frame without an order by clause.
+ intercept("foo(*) over (partition by a rows 10 preceding)",
"mismatched input 'rows'")
+ }
+
+ test("row constructor") {
+ // Note that '(a)' will be interpreted as a nested expression.
+ assertEqual("(a, b)", CreateStruct(Seq('a, 'b)))
+ assertEqual("(a, b, c)", CreateStruct(Seq('a, 'b, 'c)))
+ }
+
+ test("scalar sub-query") {
+ assertEqual(
+ "(select max(val) from tbl) > current",
+ ScalarSubquery(table("tbl").select('max.function('val))) > 'current)
+ assertEqual(
+ "a = (select b from s)",
+ 'a === ScalarSubquery(table("s").select('b)))
+ }
+
+ test("case when") {
+ assertEqual("case a when 1 then b when 2 then c else d end",
+ CaseKeyWhen('a, Seq(1, 'b, 2, 'c, 'd)))
+ assertEqual("case when a = 1 then b when a = 2 then c else d end",
+ CaseWhen(Seq(('a === 1, 'b.expr), ('a === 2, 'c.expr)), 'd))
+ }
+
+ test("dereference") {
+ assertEqual("a.b", UnresolvedAttribute("a.b"))
+ assertEqual("`select`.b", UnresolvedAttribute("select.b"))
+ assertEqual("(a + b).b", ('a + 'b).getField("b")) // This will fail
analysis.
+ assertEqual("struct(a, b).b", 'struct.function('a, 'b).getField("b"))
+ }
+
+ test("reference") {
+ // Regular
+ assertEqual("a", 'a)
+
+ // Starting with a digit.
+ assertEqual("1a", Symbol("1a"))
+
+ // Quoted using a keyword.
+ assertEqual("`select`", 'select)
+
+ // Unquoted using an unreserved keyword.
+ assertEqual("columns", 'columns)
+ }
+
+ test("subscript") {
+ assertEqual("a[b]", 'a.getItem('b))
+ assertEqual("a[1 + 1]", 'a.getItem(Literal(1) + 1))
+ assertEqual("`c`.a[b]", UnresolvedAttribute("c.a").getItem('b))
+ }
+
+ test("parenthesis") {
+ assertEqual("(a)", 'a)
+ assertEqual("r * (a + b)", 'r * ('a + 'b))
+ }
+
+ test("type constructors") {
+ // Dates.
+ assertEqual("dAte '2016-03-11'", Literal(Date.valueOf("2016-03-11")))
+ intercept[IllegalArgumentException] {
+ parseExpression("DAtE 'mar 11 2016'")
+ }
+
+ // Timestamps.
+ assertEqual("tImEstAmp '2016-03-11 20:54:00.000'",
+ Literal(Timestamp.valueOf("2016-03-11 20:54:00.000")))
+ intercept[IllegalArgumentException] {
+ parseExpression("timestamP '2016-33-11 20:54:00.000'")
+ }
+
+ // Unsupported datatype.
+ intercept("GEO '(10,-6)'", "Literals of type 'GEO' are currently not
supported.")
+ }
+
+ test("literals") {
+ // NULL
+ assertEqual("null", Literal(null))
+
+ // Boolean
+ assertEqual("trUe", Literal(true))
+ assertEqual("False", Literal(false))
+
+ // Integral should have the narrowest possible type
+ assertEqual("787324", Literal(787324))
+ assertEqual("7873247234798249234", Literal(7873247234798249234L))
+ assertEqual("78732472347982492793712334",
+ Literal(BigDecimal("78732472347982492793712334").underlying()))
+
+ // Decimal
+ assertEqual("7873247234798249279371.2334",
+ Literal(BigDecimal("7873247234798249279371.2334").underlying()))
+
+ // Scientific Decimal
+ assertEqual("9.0e1", 90d)
+ assertEqual(".9e+2", 90d)
+ assertEqual("0.9e+2", 90d)
+ assertEqual("900e-1", 90d)
+ assertEqual("900.0E-1", 90d)
+ assertEqual("9.e+1", 90d)
+ intercept(".e3")
+
+ // Tiny Int Literal
+ assertEqual("10Y", Literal(10.toByte))
+ intercept("-1000Y")
+
+ // Small Int Literal
+ assertEqual("10S", Literal(10.toShort))
+ intercept("40000S")
+
+ // Long Int Literal
+ assertEqual("10L", Literal(10L))
+ intercept("78732472347982492793712334L")
+
+ // Double Literal
+ assertEqual("10.0D", Literal(10.0D))
+ // TODO we need to figure out if we should throw an exception here!
+ assertEqual("1E309", Literal(Double.PositiveInfinity))
+ }
+
+ test("strings") {
+ // Single Strings.
+ assertEqual("\"hello\"", "hello")
+ assertEqual("'hello'", "hello")
+
+ // Multi-Strings.
+ assertEqual("\"hello\" 'world'", "helloworld")
+ assertEqual("'hello' \" \" 'world'", "hello world")
+
+ // 'LIKE' string literals. Notice that an escaped '%' is the same as
an escaped '\' and a
+ // regular '%'; to get the correct result you need to add another
escaped '\'.
+ // TODO figure out if we shouldn't change the
ParseUtils.unescapeSQLString method?
+ assertEqual("'pattern%'", "pattern%")
+ assertEqual("'no-pattern\\%'", "no-pattern\\%")
+ assertEqual("'pattern\\\\%'", "pattern\\%")
+ assertEqual("'pattern\\\\\\%'", "pattern\\\\%")
+
+ // Escaped characters.
+ // See: http://dev.mysql.com/doc/refman/5.7/en/string-literals.html
+ assertEqual("'\\0'", "\u0000") // ASCII NUL (X'00')
+ assertEqual("'\\''", "\'") // Single quote
+ assertEqual("'\\\"'", "\"") // Double quote
+ assertEqual("'\\b'", "\b") // Backspace
+ assertEqual("'\\n'", "\n") // Newline
+ assertEqual("'\\r'", "\r") // Carriage return
+ assertEqual("'\\t'", "\t") // Tab character
+ assertEqual("'\\Z'", "\u001A") // ASCII 26 - CTRL + Z (EOF on windows)
+
+ // Octals
+ assertEqual("'\\110\\145\\154\\154\\157\\041'", "Hello!")
+
+ // Unicode
+
assertEqual("'\\u0087\\u0111\\u0114\\u0108\\u0100\\u0032\\u0058\\u0041'",
"World :)")
+ }
+
+ test("intervals") {
+ def intervalLiteral(u: String, s: String): Literal = {
+ Literal(CalendarInterval.fromSingleUnitString(u, s))
+ }
+
+ // Empty interval statement
+ intercept("interval", "at least one time unit should be given for
interval literal")
+
+ // Single Intervals.
+ val units = Seq(
+ "year",
+ "month",
+ "week",
+ "day",
+ "hour",
+ "minute",
+ "second",
+ "millisecond",
+ "microsecond")
+ val forms = Seq("", "s")
+ val values = Seq("0", "10", "-7", "21")
+ units.foreach { unit =>
+ forms.foreach { form =>
+ values.foreach { value =>
+ val expected = intervalLiteral(unit, value)
+ assertEqual(s"interval $value $unit$form", expected)
+ assertEqual(s"interval '$value' $unit$form", expected)
+ }
+ }
+ }
+
+ // Hive nanosecond notation.
+ assertEqual("interval 13.123456789 seconds", intervalLiteral("second",
"13.123456789"))
+ assertEqual("interval -13.123456789 second", intervalLiteral("second",
"-13.123456789"))
+
+ // Non Existing unit
+ intercept("interval 10 nanoseconds", "No interval can be constructed")
+
+ // Year-Month intervals.
+ val yearMonthValues = Seq("123-10", "496-0", "-2-3", "-123-0")
+ yearMonthValues.foreach { value =>
+ val result = Literal(CalendarInterval.fromYearMonthString(value))
+ assertEqual(s"interval '$value' year to month", result)
+ }
+
+ // Year-Month intervals.
--- End diff --
how about the day-time intervals?
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]