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added decimal type #54

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added decimal type #54

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b9cad79
added decimal type
ExpandingMan Nov 21, 2019
c71ec64
deleted Manifest.toml
ExpandingMan Nov 21, 2019
6cb2d92
reverted julia compat change
ExpandingMan Nov 22, 2019
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3 changes: 2 additions & 1 deletion Project.toml
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Original file line number Diff line number Diff line change
@@ -1,9 +1,10 @@
name = "JDBC"
uuid = "6042db11-3c3d-5e84-8dba-9cbf74c9ba48"
version = "0.5.0"
version = "0.5.1"

[deps]
Dates = "ade2ca70-3891-5945-98fb-dc099432e06a"
Decimals = "abce61dc-4473-55a0-ba07-351d65e31d42"
JavaCall = "494afd89-becb-516b-aafa-70d2670c0337"
Tables = "bd369af6-aec1-5ad0-b16a-f7cc5008161c"

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37 changes: 30 additions & 7 deletions src/JDBC.jl
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Original file line number Diff line number Diff line change
@@ -1,12 +1,12 @@
#This file is part of JDBC.jl. License is MIT.
module JDBC
using JavaCall
using Dates
using Dates, Decimals

export DriverManager, createStatement, prepareStatement, prepareCall, executeQuery, setFetchSize,
getInt, getFloat, getString, getShort, getByte, getTime, getTimestamp, getDate,
getBoolean, getNString, getURL, setInt, setFloat, setString, setShort, setByte, setBoolean,
getMetaData, getColumnCount, getColumnType, getColumnName, executeUpdate, execute, commit,
getBoolean, getNString, getURL, getBigDecimal, setInt, setFloat, setString, setShort, setByte, setBoolean,
setBigDecimal, getMetaData, getColumnCount, getColumnType, getColumnName, executeUpdate, execute, commit,
rollback, setAutoCommit, getResultSet


Expand All @@ -32,6 +32,7 @@ const JStatement = @jimport java.sql.Statement
const JPreparedStatement = @jimport java.sql.PreparedStatement
const JCallableStatement = @jimport java.sql.CallableStatement
const JConnection = @jimport java.sql.Connection
const JBigDecimal = @jimport java.math.BigDecimal

const COLUMN_NO_NULLS = 0
const COLUMN_NULLABLE = 1
Expand All @@ -40,6 +41,10 @@ const COLUMN_NULLABLE_UNKNOWN = 2
init() = JavaCall.init()
destroy() = JavaCall.destroy()


JBigDecimal(x::Decimal) = JBigDecimal((JString,), string(x))
Decimals.Decimal(x::JBigDecimal) = decimal(jcall(x, "toPlainString", JString, ()))

"""
```
createStatement(connection::JConnection)
Expand Down Expand Up @@ -283,8 +288,7 @@ for s in [("String", :JString),
("Float", :jfloat),
("Double", :jdouble),
("Byte", :jbyte),
("URL", :(@jimport(java.net.URL))),
("BigDecimal", :(@jimport(java.math.BigDecimal)))]
("URL", :(@jimport(java.net.URL)))]
m = Symbol(string("get", s[1]))
n = Symbol(string("set", s[1]))
v = quote
Expand All @@ -295,6 +299,25 @@ for s in [("String", :JString),
eval(v)
end

# this requires a special conversion
function getBigDecimal_raw(rs::Union{JResultSet, JCallableStatement}, fld::AbstractString)
jcall(rs, "getBigDecimal", JBigDecimal, (JString,), fld)
end
function getBigDecimal_raw(rs::Union{JResultSet, JCallableStatement}, fld::Integer)
jcall(rs, "getBigDecimal", JBigDecimal, (jint,), fld)
end
function setBigDecimal_raw(stmt::Union{JPreparedStatement, JCallableStatement}, idx::Integer, v)
jcall(stmt, "setBigDecimal", Nothing, (jint, JBigDecimal), idx, v)
end

getBigDecimal(rs::Union{JResultSet,JCallableStatement}, fld) = Decimal(getBigDecimal_raw(rs, fld))
function setBigDecimal(stmt::Union{JPreparedStatement,JCallableStatement}, idx::Integer, v::AbstractString)
setBigDecimal_raw(stmt, idx, JBigDecimal((JString,), v))
end
function setBigDecimal(stmt::Union{JPreparedStatement,JCallableStatement}, idx::Integer, v::Decimal)
setBigDecimal_raw(stmt, idx, JBigDecimal(v))
end

"""
```
getDate(rs::Union{JResultSet, JCallableStatement}, fld::AbstractString)
Expand Down Expand Up @@ -548,7 +571,7 @@ global const get_method_dict = Dict(
# JDBC_COLTYPE_CLOB => 2005,
# JDBC_COLTYPE_DATALINK => 70,
JDBC_COLTYPE_DATE => getDate,
JDBC_COLTYPE_DECIMAL => getFloat,
JDBC_COLTYPE_DECIMAL => getBigDecimal,
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So one of the reasons I hadn't implemented this yet is the fear that doing things this way means every numeric field is now Decimal object, which is hundreds of time slower. Even columsn with small or low precision numbers. Should I not worry about that?

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I was also concerned about just what the meaning was of NUMERIC. As far as I can tell, NUMERIC really does mean decimal, and not float, see here. Even if this is true, it doesn't mean there aren't lots of places where people have carelessly declared fields that should be floats as NUMERIC, but not much we can do about that I suppose.

# JDBC_COLTYPE_DISTINCT => 2001,
JDBC_COLTYPE_DOUBLE => getDouble,
JDBC_COLTYPE_FLOAT => getFloat,
Expand All @@ -560,7 +583,7 @@ global const get_method_dict = Dict(
JDBC_COLTYPE_NCHAR => getNString,
# JDBC_COLTYPE_NCLOB => 2011,
# JDBC_COLTYPE_NULL => 0,
JDBC_COLTYPE_NUMERIC => getDouble,
JDBC_COLTYPE_NUMERIC => getBigDecimal,
JDBC_COLTYPE_NVARCHAR => getNString,
# JDBC_COLTYPE_OTHER => 1111,
JDBC_COLTYPE_REAL => getFloat,
Expand Down
4 changes: 2 additions & 2 deletions src/tables.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -7,14 +7,14 @@ const column_types = Dict(
JDBC_COLTYPE_BOOLEAN=>Bool,
JDBC_COLTYPE_CHAR=>String,
JDBC_COLTYPE_DATE=>Date,
JDBC_COLTYPE_DECIMAL=>Float64,
JDBC_COLTYPE_DECIMAL=>Decimal,
JDBC_COLTYPE_DOUBLE=>Float64,
JDBC_COLTYPE_FLOAT=>Float32,
JDBC_COLTYPE_INTEGER=>Int32,
JDBC_COLTYPE_LONGNVARCHAR=>String,
JDBC_COLTYPE_LONGVARCHAR=>String,
JDBC_COLTYPE_NCHAR=>String,
JDBC_COLTYPE_NUMERIC=>Float64,
JDBC_COLTYPE_NUMERIC=>Decimal,
JDBC_COLTYPE_NVARCHAR=>String,
JDBC_COLTYPE_REAL=>Float64,
JDBC_COLTYPE_ROWID=>Int64,
Expand Down
14 changes: 10 additions & 4 deletions test/runtests.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@ using JDBC
using DataFrames
using Test
using Dates
using Decimals
import Pkg

derby_driver_path = joinpath(dirname(pathof(JDBC)),"..","test","derby.jar")
Expand Down Expand Up @@ -94,23 +95,28 @@ stmt = createStatement(conn)

executeUpdate(stmt, "CREATE TABLE FIRSTTABLE
(ID INT PRIMARY KEY,
NAME VARCHAR(12))")
ppstmt = prepareStatement(conn, "insert into firsttable values (?, ?)")
NAME VARCHAR(12),
VALUE DECIMAL(5,2))")
ppstmt = prepareStatement(conn, "insert into firsttable values (?, ?, ?)")
setInt(ppstmt, 1,10)
setString(ppstmt, 2,"TEN")
setBigDecimal(ppstmt, 3, decimal("10.38"))
executeUpdate(ppstmt)
setInt(ppstmt, 1,20)
setString(ppstmt, 2,"TWENTY")
setBigDecimal(ppstmt, 3, decimal("-1.72e2"))
executeUpdate(ppstmt)
rs=executeQuery(stmt, "select * from FIRSTTABLE")
rs = executeQuery(stmt, "select * from FIRSTTABLE")
ft = JDBC.load(DataFrame, rs)

@testset "Query3" begin
@test size(ft) == (2,2)
@test size(ft) == (2,3)
@test ft[1, :ID] == 10
@test ft[1, :NAME] == "TEN"
@test ft[1, :VALUE] == decimal("10.38")
@test ft[2, :ID] == 20
@test ft[2, :NAME] == "TWENTY"
@test ft[2, :VALUE] == decimal("-1.72e2")
end

close(rs)
Expand Down