Class: DuckDB::Appender

Inherits:
Object
  • Object
show all
Includes:
Converter
Defined in:
lib/duckdb/appender.rb,
ext/duckdb/appender.c

Overview

The DuckDB::Appender encapsulates DuckDB Appender.

require 'duckdb'
db = DuckDB::Database.open
con = db.connect
con.query('CREATE TABLE users (id INTEGER, name VARCHAR)')
appender = con.appender('users')
appender.append_row(1, 'Alice')

Constant Summary collapse

RANGE_INT16 = 
-32_768..32_767
RANGE_INT32 = 
-2_147_483_648..2_147_483_647
RANGE_INT64 = 
-9_223_372_036_854_775_808..9_223_372_036_854_775_807

Constants included from Converter

Converter::FLIP_HUGEINT, Converter::HALF_HUGEINT, Converter::HALF_HUGEINT_BIT

Instance Method Summary collapse

Methods included from Converter

_to_date, _to_decimal_from_vector, _to_hugeint_from_vector, _to_interval_from_vector, _to_time, _to_uuid_from_vector

Constructor Details

#initialize(con, schema, table) ⇒ Object 



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# File 'ext/duckdb/appender.c', line 56

static VALUE appender_initialize(VALUE self, VALUE con, VALUE schema, VALUE table) {

    rubyDuckDBConnection *ctxcon;
    rubyDuckDBAppender *ctx;
    char *pschema = 0;

    if (!rb_obj_is_kind_of(con, cDuckDBConnection)) {
        rb_raise(rb_eTypeError, "1st argument should be instance of DackDB::Connection");
    }

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);
    ctxcon = get_struct_connection(con);

    if (schema != Qnil) {
        pschema = StringValuePtr(schema);
    }

    if (duckdb_appender_create(ctxcon->con, pschema, StringValuePtr(table), &(ctx->appender)) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to create appender");
    }
    return self;
}

Instance Method Details

#append(value) ⇒ Object

appends value.

require 'duckdb'
db = DuckDB::Database.open
con = db.connect
con.query('CREATE TABLE users (id INTEGER, name VARCHAR)')
appender = con.appender('users')
appender.begin_row
appender.append(1)
appender.append('Alice')
appender.end_row



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# File 'lib/duckdb/appender.rb', line 170

def append(value)
  case value
  when NilClass
    append_null
  when Float
    append_double(value)
  when Integer
    case value
    when RANGE_INT16
      append_int16(value)
    when RANGE_INT32
      append_int32(value)
    when RANGE_INT64
      append_int64(value)
    else
      append_hugeint(value)
    end
  when String
    blob?(value) ? append_blob(value) : append_varchar(value)
  when TrueClass, FalseClass
    append_bool(value)
  when Time
    append_timestamp(value)
  when Date
    append_date(value)
  when DuckDB::Interval
    append_interval(value)
  else
    raise(DuckDB::Error, "not supported type #{value} (#{value.class})")
  end
end

#append_blob(val) ⇒ Object 



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# File 'ext/duckdb/appender.c', line 259

static VALUE appender_append_blob(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;

    char *pval = StringValuePtr(val);
    idx_t length = (idx_t)RSTRING_LEN(val);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_blob(ctx->appender, (void *)pval, length) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_bool(val) ⇒ Object 



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# File 'ext/duckdb/appender.c', line 99

static VALUE appender_append_bool(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;
    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (val != Qtrue && val != Qfalse) {
        rb_raise(rb_eArgError, "argument must be boolean");
    }

    if (duckdb_append_bool(ctx->appender, (val == Qtrue)) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append boolean");
    }
    return self;
}

#append_date(value) ⇒ Object

appends date value.

require 'duckdb'
db = DuckDB::Database.open
con = db.connect
con.query('CREATE TABLE dates (date_value DATE)')
appender = con.appender('dates')
appender.begin_row
appender.append_date(Date.today)
# or
# appender.append_date(Time.now)
# appender.append_date('2021-10-10')
appender.end_row
appender.flush



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# File 'lib/duckdb/appender.rb', line 58

def append_date(value)
  date = case value
         when Date, Time
           value
         else
           begin
             Date.parse(value)
           rescue
             raise(ArgumentError, "Cannot parse argument `#{value}` to Date.")
           end
         end

  _append_date(date.year, date.month, date.day)
end

#append_double(val) ⇒ Object 



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# File 'ext/duckdb/appender.c', line 221

static VALUE appender_append_double(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;
    double dval = NUM2DBL(val);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_double(ctx->appender, dval) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_float(val) ⇒ Object 



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# File 'ext/duckdb/appender.c', line 209

static VALUE appender_append_float(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;
    float fval = (float)NUM2DBL(val);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_float(ctx->appender, fval) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_hugeint(value) ⇒ Object

appends huge int value.

require 'duckdb'
db = DuckDB::Database.open
con = db.connect
con.query('CREATE TABLE numbers (num HUGEINT)')
appender = con.appender('numbers')
appender
  .begin_row
  .append_hugeint(-170_141_183_460_469_231_731_687_303_715_884_105_727)
  .end_row



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# File 'lib/duckdb/appender.rb', line 37

def append_hugeint(value)
  lower, upper = integer_to_hugeint(value)
  _append_hugeint(lower, upper)
end

#append_int16(val) ⇒ Object 



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# File 'ext/duckdb/appender.c', line 125

static VALUE appender_append_int16(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;
    int16_t i16val = (int16_t)NUM2INT(val);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_int16(ctx->appender, i16val) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_int32(val) ⇒ Object 



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# File 'ext/duckdb/appender.c', line 137

static VALUE appender_append_int32(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;
    int32_t i32val = (int32_t)NUM2INT(val);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_int32(ctx->appender, i32val) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_int64(val) ⇒ Object 



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# File 'ext/duckdb/appender.c', line 149

static VALUE appender_append_int64(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;
    int64_t i64val = (int64_t)NUM2LL(val);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_int64(ctx->appender, i64val) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_int8(val) ⇒ Object 



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# File 'ext/duckdb/appender.c', line 113

static VALUE appender_append_int8(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;
    int8_t i8val = (int8_t)NUM2INT(val);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_int8(ctx->appender, i8val) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_interval(value) ⇒ Object

appends interval. The argument must be ISO8601 duration format. WARNING: This method is expremental.

require 'duckdb'
db = DuckDB::Database.open
con = db.connect
con.query('CREATE TABLE intervals (interval_value INTERVAL)')
appender = con.appender('intervals')
appender
  .begin_row
  .append_interval('P1Y2D') # => append 1 year 2 days interval.
  .end_row
  .flush



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# File 'lib/duckdb/appender.rb', line 152

def append_interval(value)
  value = Interval.to_interval(value)
  _append_interval(value.interval_months, value.interval_days, value.interval_micros)
end

#append_null ⇒ Object 



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# File 'ext/duckdb/appender.c', line 273

static VALUE appender_append_null(VALUE self) {
    rubyDuckDBAppender *ctx;
    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_null(ctx->appender) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_row(*args) ⇒ Object

append a row.

appender.append_row(1, 'Alice')

is same as:

appender.begin_row
appender.append(1)
appender.append('Alice')
appender.end_row



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# File 'lib/duckdb/appender.rb', line 214

def append_row(*args)
  begin_row
  args.each do |arg|
    append(arg)
  end
  end_row
end

#append_time(value) ⇒ Object

appends time value.

require 'duckdb'
db = DuckDB::Database.open
con = db.connect
con.query('CREATE TABLE times (time_value TIME)')
appender = con.appender('times')
appender.begin_row
appender.append_time(Time.now)
# or
# appender.append_time('01:01:01')
appender.end_row
appender.flush



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# File 'lib/duckdb/appender.rb', line 88

def append_time(value)
  time = case value
         when Time
           value
         else
           begin
             Time.parse(value)
           rescue
             raise(ArgumentError, "Cannot parse argument `#{value}` to Time.")
           end
         end

  _append_time(time.hour, time.min, time.sec, time.usec)
end

#append_timestamp(value) ⇒ Object

appends timestamp value.

require 'duckdb'
db = DuckDB::Database.open
con = db.connect
con.query('CREATE TABLE timestamps (timestamp_value TIMESTAMP)')
appender = con.appender('timestamps')
appender.begin_row
appender.append_time(Time.now)
# or
# appender.append_time(Date.today)
# appender.append_time('2021-08-01 01:01:01')
appender.end_row
appender.flush



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# File 'lib/duckdb/appender.rb', line 119

def append_timestamp(value)
  time = case value
         when Time
           value
         when Date
           value.to_time
         else
           begin
             Time.parse(value)
           rescue
             raise(ArgumentError, "Cannot parse argument `#{value}` to Time or Date.")
           end
         end

  _append_timestamp(time.year, time.month, time.day, time.hour, time.min, time.sec, time.nsec / 1000)
end

#append_uint16(val) ⇒ Object 



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# File 'ext/duckdb/appender.c', line 173

static VALUE appender_append_uint16(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;
    uint16_t ui16val = (uint16_t)NUM2UINT(val);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_uint16(ctx->appender, ui16val) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_uint32(val) ⇒ Object 



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# File 'ext/duckdb/appender.c', line 185

static VALUE appender_append_uint32(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;
    uint32_t ui32val = (uint32_t)NUM2UINT(val);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_uint32(ctx->appender, ui32val) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_uint64(val) ⇒ Object 



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# File 'ext/duckdb/appender.c', line 197

static VALUE appender_append_uint64(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;
    uint64_t ui64val = (uint64_t)NUM2ULL(val);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_uint64(ctx->appender, ui64val) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_uint8(val) ⇒ Object 



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# File 'ext/duckdb/appender.c', line 161

static VALUE appender_append_uint8(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;
    int8_t ui8val = (uint8_t)NUM2UINT(val);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_uint8(ctx->appender, ui8val) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_varchar(val) ⇒ Object 



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# File 'ext/duckdb/appender.c', line 233

static VALUE appender_append_varchar(VALUE self, VALUE val) {
    rubyDuckDBAppender *ctx;
    char *pval = StringValuePtr(val);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_varchar(ctx->appender, pval) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#append_varchar_length(val, len) ⇒ Object 



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# File 'ext/duckdb/appender.c', line 245

static VALUE appender_append_varchar_length(VALUE self, VALUE val, VALUE len) {
    rubyDuckDBAppender *ctx;

    char *pval = StringValuePtr(val);
    idx_t length = (idx_t)NUM2ULL(len);

    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_append_varchar_length(ctx->appender, pval, length) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to append");
    }
    return self;
}

#begin_row ⇒ Object 



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# File 'ext/duckdb/appender.c', line 79

static VALUE appender_begin_row(VALUE self) {
    rubyDuckDBAppender *ctx;
    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_appender_begin_row(ctx->appender) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to flush");
    }
    return self;
}

#close ⇒ Object 



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# File 'ext/duckdb/appender.c', line 362

static VALUE appender_close(VALUE self) {
    rubyDuckDBAppender *ctx;
    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_appender_close(ctx->appender) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to flush");
    }
    return self;
}

#end_row ⇒ Object 



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# File 'ext/duckdb/appender.c', line 89

static VALUE appender_end_row(VALUE self) {
    rubyDuckDBAppender *ctx;
    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_appender_end_row(ctx->appender) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to flush");
    }
    return self;
}

#flush ⇒ Object 



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# File 'ext/duckdb/appender.c', line 352

static VALUE appender_flush(VALUE self) {
    rubyDuckDBAppender *ctx;
    TypedData_Get_Struct(self, rubyDuckDBAppender, &appender_data_type, ctx);

    if (duckdb_appender_flush(ctx->appender) == DuckDBError) {
        rb_raise(eDuckDBError, "failed to flush");
    }
    return self;
}